0001628280-25-051859 | 10-Q | XBRL Viewer | Greenidge Generation Holdings INC

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EQUITY BASED COMPENSATION - Narrative (Details) $ in Millions	1 Months Ended			3 Months Ended		9 Months Ended
	Jun. 30, 2025 shares	Nov. 30, 2024 shares	Apr. 30, 2023 shares	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Oct. 31, 2022 shares	Feb. 28, 2021 shares
Disclosure Of Compensation Related Costs Sharebased Payments [Line Items]
Conversion ratio on shares removed for issuance			2
Stock based compensation (benefit) expense \| $				$ (0.3)	$ 0.4	$ 0.6	$ 1.8
Common Class A
Disclosure Of Compensation Related Costs Sharebased Payments [Line Items]
Number of shares registered (in shares) \| shares								307,684
2021 Equity Plan
Disclosure Of Compensation Related Costs Sharebased Payments [Line Items]
Common stock reserved for issuance (in shares) \| shares	2,583,111	1,583,111	883,111						383,111
Number of additional shares authorized (in shares) \| shares	1,000,000	700,000	500,000
RSAs & RSUs
Disclosure Of Compensation Related Costs Sharebased Payments [Line Items]
Unrecognized compensation cost \| $				0.4		$ 0.4
Unrecognized compensation cost, period for recognition						2 years 3 months 10 days
RSAs & RSUs \| 2021 Equity Plan
Disclosure Of Compensation Related Costs Sharebased Payments [Line Items]
Vesting period						2 years
Common shares issuable upon exercise of stock options
Disclosure Of Compensation Related Costs Sharebased Payments [Line Items]
Unrecognized compensation cost \| $				$ 0.2		$ 0.2
Unrecognized compensation cost, period for recognition						1 year 21 days

STOCKHOLDERS' DEFICIT

9 Months Ended

Sep. 30, 2025

Stockholders' Equity Note [Abstract]

STOCKHOLDERS' DEFICIT

STOCKHOLDERS’ DEFICIT

Common Stock Purchase Agreement with B. Riley Principal Capital II, LLC

On July 30, 2024, Greenidge entered into a common stock purchase agreement (the “Common Stock Purchase Agreement”) with B. Riley Principal Capital II, LLC (“B. Riley Principal II”), an affiliate of B. Riley Principal. Pursuant to the Common Stock Purchase Agreement, Greenidge has the right to sell to B. Riley Principal II up to $20 million in shares of its Class A common stock, subject to certain limitations and the satisfaction of specified conditions in the Common Stock Purchase Agreement, from time to time over the 36-month period commencing September 24, 2024.

In connection with the Common Stock Purchase Agreement, Greenidge entered into a registration rights agreement with B. Riley Principal II, pursuant to which Greenidge agreed to prepare and file a registration statement registering the resale by B. Riley Principal II of those shares of Greenidge’s Class A common stock to be issued under the Common Stock Purchase Agreement. The registration statement became effective on September 24, 2024 (the “Effective Date”), relating to the resale of 7,300,000 shares of Greenidge’s Class A common stock in connection with the Common Stock Purchase Agreement.

From the Effective Date through September 30, 2025, Greenidge issued an aggregate of 1,595,855 shares under the Common Stock Purchase Agreement for net proceeds of $4.3 million, of which no shares were issued during the three and nine months ended September 30, 2025.

At The Market Issuance Sales Agreement with B. Riley Securities

On September 19, 2022, as amended on October 3, 2022, Greenidge entered into an At Market Issuance Sales Agreement (the “ATM Agreement”) with B. Riley Securities, Inc. (“B. Riley”) and Northland Securities, Inc., relating to shares of Greenidge’s Class A common stock. Under the ATM Agreement, B. Riley will use its commercially reasonable efforts to sell on Greenidge’s behalf the shares of Greenidge’s Class A common stock requested to be sold by Greenidge, consistent with B. Riley’s normal trading and sales practices, under the terms and subject to the conditions set forth in the ATM Agreement. Greenidge has the discretion, subject to market demand, to vary the timing, prices and number of shares sold in accordance with the ATM Agreement. B. Riley may sell the Company’s Class A common stock by any method permitted by law deemed to be an “at the market offering” as defined in Rule 415(a)(4) promulgated under the Securities Act. Greenidge pays B. Riley commissions for its services in acting as sales agent, in an amount to up to 3.0% of the gross proceeds of all Class A common stock sold through it as sales agent under the ATM Agreement. Pursuant to the registration statement filed registering shares to be sold in accordance with the terms of the ATM Agreement, Greenidge may offer and sell shares of its Class A common stock up to a maximum aggregate offering price of $22,800,000.

From October 1, 2022 through September 30, 2025, Greenidge issued an aggregate of 4,167,463 shares under the ATM Agreement for net proceeds of $20.7 million, of which no shares were issued during the three and nine months ended September 30, 2025.

Armistice Capital Agreement

On February 12, 2024, the Company entered into a securities purchase agreement (the “Armistice SPA”) with Armistice Capital Master Fund Ltd. (“Armistice”). Pursuant to the SPA, Armistice purchased (i) 450,300 shares (the “Shares”) of the Company’s Class A common stock, and (ii) a pre-funded Class A common stock purchase warrant (the “Pre-Funded Warrant”) for 810,205 shares of the Company’s Class A common stock (the “Pre-Funded Warrant Shares”). The per share purchase price of the Shares and the Pre-Funded Warrant Shares was $4.76, resulting in aggregate gross proceeds of $6.0 million, and after giving effect to the exercise price of $0.0001 per Pre-Funded Warrant Share, the Company received net proceeds of $6.0 million. The Pre-Funded Warrant, which had an initial exercise date of February 14, 2024, was exercised in full during the year ended December 31, 2024, which resulted in the issuance of 810,205 Class A shares of common stock. In addition, the Company issued to Armistice a five-year Class A common stock purchase warrant (the “Armistice Warrant”) entitling Armistice, commencing on August 14, 2024, to acquire up to 1,260,505 shares of the Company’s Class A common stock from time to time at an exercise price of $5.25 per share (the “Warrant Shares”). The Warrant Shares remained unexercised as of September 30, 2025.

The Pre-Funded Warrant and Armistice Warrant were classified as a component of permanent stockholders’ equity within additional paid-in capital and were recorded at the issuance date using a relative fair value allocation method. The Company valued the Pre-Funded Warrant at issuance, concluding that its sale price approximated their fair value, and allocated the aggregate net proceeds from the sale proportionately to the Armistice Warrant and Pre-Funded Warrant, including approximately $2.0 million allocated to the Pre-Funded Warrant and recorded as a component of additional paid-in capital. The Company valued the Armistice Warrant using the Black-Scholes-Merton option pricing model and recorded as a component of additional paid-in capital with an allocated amount of $2.8 million. By analogy to ASC 505-20-30-3, the Company would have recorded a charge to retained earnings, however, as the Company is in a deficit position it was recorded as a component of additional paid-in capital.

Warrants

There was no activity for warrants issued by the Company during the nine months ended September 30, 2025.

The following table summarizes information about warrants outstanding at September 30, 2025:


	Number of Warrants Outstanding	Number of Warrants Exercisable	Exercise Price		Expiration Date
February 2024 Warrants	1,260,505	1,260,505	$	5.25	August 14, 2029

Debt Exchange Agreements

During the nine months ended September 30, 2025, the Company entered into privately negotiated exchange agreements, pursuant to which it issued an aggregate of 1,242,456 shares of the Company’s Class A common stock. The shares of the Company’s Class A common stock were issued with an aggregate fair value of $1.5 million, as well as cash payments totaling $2.7 million, in exchange for $10.5 million in aggregate principal amount of the Senior Notes.

Equity Interest Payment Agreement

The Company entered into an Equity Interest Payment Agreement, dated as of January 24, 2025 (the “Equity Interest Payment Agreement”), pursuant to which and as consideration for Atlas Holdings LLC’s, the Company’s controlling shareholder and a related party (collectively with its affiliates, “Atlas”), continued credit support with respect to the letters of credit mentioned in Note 12, “Related Party Transactions,” totaling $8.6 million, the Company shall pay interest at a rate of 8.5% per annum. The interest will be calculated on a per diem basis based on the number of days in the applicable measurement period, which interest payments shall be net of any interest otherwise actually received by Atlas from the issuing bank. Payments will be made by issuing Class A common stock to Atlas calculated using the volume weighted average price of Class A common stock as reported on The Nasdaq Global Select Market, with the total cumulative shares not to exceed 19.99% of the sum of the number of outstanding shares of Class A common stock and shares of Class B common stock as of January 24, 2025. In the event that the Class A common stock issuable under the Equity Interest Payment Agreement exceeds the aforementioned 19.99%, then subsequent payments will be made in cash for the amount in excess of 19.99%.

In connection with the Equity Interest Payment Agreement, the Company agreed to pay, by issuing shares of its Class A common stock, a letter of credit extension payment as further consideration for Atlas to enter into the Equity Interest Payment Agreement and maintain the letters of credit. On January 29, 2025, the Company issued 752,742 shares of Class A common stock to settle the letter of credit extension payment. The aggregate fair value of the Class A common stock issued was $1.4 million. On April 8, 2025, the Company issued an additional 90,954 shares of Class A common stock to settle the equity interest payment for Q1 2025, of which the fair value of the Class A common stock issue was $0.1 million. On July 2, 2025, the Company issued an additional 131,937 shares of Class A common stock to settle the equity interest payment for Q2 2025, of which the fair value of the Class A common stock issued was $0.2 million. On October 9, 2025, the Company issued an additional 102,286 shares of Class A common stock to settle the equity interest payment for Q3 2025, of which the fair value of the Class A common stock issued was $0.2 million, for a cumulative total of 1,077,919 shares of Class A common stock issued pursuant to the Equity Interest Payment Agreement as of the filing date of this report, with an aggregate fair value of $1.9 million, which was recognized as interest expense in the consolidated statements of operations and comprehensive loss.

- Definition

The entire disclosure for equity.

+ References

+ Details

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
CURRENT ASSETS:
Cash and cash equivalents	$ 7,581	$ 8,619
Digital assets	6,118	6,950
Accounts receivable	639	1,493
Prepaid expenses and current other assets	2,611	2,617
Emissions and carbon offset credits	4,748	7,124
Income tax receivable	103	0
Total current assets	21,800	26,803
LONG-TERM ASSETS:
Property and equipment, net	19,735	30,299
Other long-term assets	1,848	569
Long-term assets held for sale	7,184	7,184
Total assets	50,567	64,855
CURRENT LIABILITIES:
Accounts payable	2,467	3,850
Accrued emissions expense	11,807	8,668
Accrued expenses	4,108	4,232
Short-term environmental liability	250	250
Contract liabilities	2,147	2,339
Long-term debt, current portion	3,535	0
Total current liabilities	24,480	19,339
LONG-TERM LIABILITIES:
Long-term debt, net of deferred financing fees	42,314	68,068
Environmental liabilities	30,432	30,432
Other long-term liabilities	2,749	2,770
Total liabilities	99,975	120,609
COMMITMENTS AND CONTINGENCIES (NOTE 10)
STOCKHOLDERS’ DEFICIT:
Preferred stock, par value $0.0001, 20,000,000 shares authorized, none outstanding	0	0
Common stock, par value $0.0001, 500,000,000 shares authorized, 15,679,417 and 13,025,627 shares issued and outstanding as of September 30, 2025 and December 31, 2024, respectively	1	1
Additional paid-in capital	338,052	334,330
Cumulative translation adjustment	0	(348)
Accumulated deficit	(387,461)	(389,737)
Total stockholders’ deficit	(49,408)	(55,754)
Total liabilities and stockholders’ deficit	50,567	64,855
Related Party
CURRENT LIABILITIES:
Related party payables	$ 166	$ 0

STOCKHOLDERS' DEFICIT - Schedule of Warrants (Details) - February 2024 Warrants	Sep. 30, 2025 $ / shares shares
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)	1,260,505
Number of warrants exercisable (in shares)	1,260,505
Exercise price (in dollars per share) \| $ / shares	$ 5.25

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)(Parenthetical) - $ / shares	Sep. 30, 2025	Dec. 31, 2024
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, authorized (in shares)	20,000,000	20,000,000
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, authorized (in shares)	500,000,000	500,000,000
Common stock, issued (in shares)	15,679,417	13,025,627
Common stock, outstanding (in shares)	15,679,417	13,025,627

FAIR VALUE (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024
Assets:
Digital assets	$ 6,118	$ 7,299	$ 6,950
Level 1
Assets:
Digital assets	6,118		6,950
Level 2
Assets:
Digital assets	0		0
Level 3
Assets:
Digital assets	$ 0		$ 0

DEBT (Tables)

9 Months Ended

Sep. 30, 2025

Debt Disclosure [Abstract]

Schedule of Debt

The following table provides information on the Company’s debt agreements as of September 30, 2025 and December 31, 2024:


$ in thousands							Balance as of:
Note	Loan Date	Maturity Date	Interest Rate		Amount Financed		September 30, 2025		December 31, 2024
Senior Unsecured Notes	October 2021/December 2021	October 2026	8.5	%	$	72,200	$	42,491	$	68,541
Senior Unsecured Notes	July 2025/September 2025	June 2030	10.0	%	2,245		3,358		—
Total Debt							45,849		68,541
Less: Debt discount and issue costs							—		(473)
Total debt at book value							45,849		68,068
Less: Current portion							(3,535)		—
Long-term debt, net of current portion and deferred financing fees							$	42,314	$	68,068

Schedule of Interest Expense

The following table details our interest expense related to the Senior Notes and the Equity Interest Payment Agreement (defined below) (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2025		2024		2025		2024
Contractual interest expense on Senior Notes	$	42	$	1,534	$	2,772	$	4,603
Amortization of debt (premium) discount and issuance costs	—		295		(738)		824
Total interest expense on Senior Notes	$	42	$	1,829	$	2,034	$	5,427
Interest expense on Equity Interest Payment Agreement	196		—		1,817		—
Other interest expense	6		3		6		12
Total interest expense	$	244	$	1,832	$	3,857	$	5,439

Schedule of Minimum Future Principal Payments on Debt

Minimum future principal payments on debt at September 30, 2025 were as follows:


$ in thousands
Remainder of 2025	$	—
2026	38,410
2027	—
2028	—
Thereafter	2,245
Total	$	40,655

SEGMENT REPORTING - Narrative (Details)	9 Months Ended
SEGMENT REPORTING - Narrative (Details)	Sep. 30, 2025 segment
Segment Reporting [Abstract]
Number of reporting segments	1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands		3 Months Ended	9 Months Ended
	Sep. 16, 2025 USD ($)	Sep. 30, 2025 USD ($) a offer	Sep. 30, 2025 USD ($) a shares	Aug. 01, 2025 a ft²	May 28, 2025 a	Apr. 10, 2024 a ft²	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Working capital deficit		$ 2,700	$ 2,700
Extinguishment of debt			$ 80,300
Area of land (in acres) \| a		152	152	5.6	34	12
Warehouse space (in square feet) \| ft²				73,000		73,000
Number of tender/exchange offers \| offer		2,000
Disposal Group, Held-for-Sale, Not Discontinued Operations \| Mississippi Facility
Debt Instrument [Line Items]
Proceeds from sale of property, plant and equipment	$ 4,200
Senior Notes
Debt Instrument [Line Items]
Senior notes		$ 38,400	$ 38,400
Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Senior notes							$ 72,200
Interest rate		8.50%	8.50%
Aggregate principal amount		$ 72,200	$ 72,200
Senior Notes \| Senior Notes \| Debt Exchange Agreements
Debt Instrument [Line Items]
Senior notes		$ 38,400	$ 38,400
Interest rate		8.50%	8.50%
Cash received in exchange		$ 5,500
Debt exchanged		14,700	$ 14,700
Aggregate principal amount		4,900	4,900
Capitalized contractual interest payment			4,100
New Notes \| Senior Notes \| Debt Exchange Agreements
Debt Instrument [Line Items]
Senior notes		$ 2,200	$ 2,200
Interest rate		10.00%	10.00%
Aggregate principal amount		$ 2,200	$ 2,200
Capitalized contractual interest payment			$ 1,100
Debt Exchange Agreements
Debt Instrument [Line Items]
Number of shares issued in transaction (in shares) \| shares			1,242,456
Debt Exchange Agreements \| Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Cash received in exchange			$ 2,700
Debt exchanged		$ 10,500	$ 10,500

SUPPLEMENTAL BALANCE SHEET AND CASH FLOW INFORMATION - Schedule of Prepaid Expenses and Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Prepaid expenses:
Electric deposits	$ 588	$ 588
Prepaid insurance	1,304	1,279
Other	719	750
Total	2,611	2,617
Accrued expenses:
Accrued interest	0	974
Other	4,108	3,258
Total	$ 4,108	$ 4,232

DEBT - Schedule of Minimum Future Principal Payments on Debt (Details) $ in Thousands	Sep. 30, 2025 USD ($)
Debt Disclosure [Abstract]
Remainder of 2025	$ 0
2026	38,410
2027	0
2028	0
Thereafter	2,245
Total	$ 40,655

ASSETS HELD FOR SALE	9 Months Ended
ASSETS HELD FOR SALE	Sep. 30, 2025
Discontinued Operations and Disposal Groups [Abstract]
ASSETS HELD FOR SALE	ASSETS HELD FOR SALE On November 27, 2024, the Company entered into a definitive agreement to sell the South Carolina Land to Data Journey LLC (“Data Journey”) for $12.1 million in cash and an 8% profit participation in the property’s planned data center. On August 24, 2025, the Company received written notice of termination from Data Journey. Upon termination, the Company recognized a gain of $0.4 million as a result of a forfeited deposit by Data Journey. The Company continues to market the property for sale. The South Carolina Land, with a carrying value of $7.2 million, is presented as long-term assets held for sale as of September 30, 2025 and December 31, 2024.

DIGITAL ASSETS (Tables)

9 Months Ended

Sep. 30, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Bitcoin Held

The following table presents the Company’s bitcoin holdings as of September 30, 2025 and December 31, 2024 (in thousands, except bitcoin held):


Digital assets holdings	September 30, 2025		December 31, 2024
Number of bitcoin held	53.6		74.5
Carrying basis of bitcoin	$	6,000	$	5,523
Fair Value of bitcoin	$	6,118	$	6,950

Schedule of Digital Assets Rollforward

The following table represents a reconciliation of the fair values of the Company’s digital assets (in thousands):


Digital assets:	Three Months Ended September 30, 2025		Nine Months Ended September 30, 2025
Beginning balance at fair value	$	7,299	$	6,950
Additions	4,178		12,639
Dispositions	(5,822)		(15,044)
Gain on digital assets	463		1,573
Ending balance	$	6,118	$	6,118

RELATED PARTY TRANSACTIONS	9 Months Ended
RELATED PARTY TRANSACTIONS	Sep. 30, 2025
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS As of September 30, 2025, Atlas controlled 70.0% of the voting power of the Company’s outstanding capital stock. As a result, the Company is a “controlled company” within the meaning of Nasdaq’s corporate governance standards. Letters of Credit Atlas obtained a letter of credit from a financial institution in the amount of $5.0 million at September 30, 2025 and December 31, 2024, payable to the NYSDEC. This letter of credit guarantees the current value of the Company’s landfill environmental trust liability. See Note 10, “Commitments and Contingencies” for further details. Atlas also has a letter of credit from a financial institution in the amount of $3.6 million at September 30, 2025 and December 31, 2024, payable to Empire in the event the Company should not make contracted payments for costs related to a pipeline interconnection project the Company has entered into with Empire. Co-Defendant Endorsement On October 14, 2024, the Company agreed to include a co-defendant endorsement under its directors and officers liability insurance policy (the “D&O Policy”) with respect to Atlas and certain of its affiliates, which, in certain circumstances, extends coverage to claims for losses attributable to a wrongful act of the Company or any of its insured persons jointly made and continuously maintained against the Company and/or any of its insured persons under the D&O Policy, on the one hand, and Atlas and/or certain of its affiliates, on the other. The inclusion of such co-defendant endorsement resulted in no change to the Company’s premiums with respect to its D&O insurance policy. Mississippi Facility On April 10, 2024, the Company closed on the purchase of a parcel of land containing approximately 12 acres located in Columbus, Mississippi, including over 73,000 square feet of industrial warehouse space, from a subsidiary of Motus Pivot Inc., a portfolio company of Atlas. The purchase price was $1.45 million. This property provided the Company with access to 32.5 MW of additional power capacity. The transaction closed in April 2024 and the Company deployed 8.5 MW of miners on the property. The Company sold certain assets of the site on September 16, 2025. See Note 4, “Property and Equipment.” Equity Interest Payment Agreement The Company entered into the Equity Interest Payment Agreement, pursuant to which and as consideration for Atlas’ continued credit support with respect to the letters of credit mentioned above, totaling $8.6 million, the Company shall pay interest at a rate of 8.5% per annum. The interest will be calculated on a per diem basis based on the number of days in the applicable measurement period, which interest payments shall be net of any interest otherwise actually received by Atlas from the issuing bank. Payments will be made by issuing Class A common stock to Atlas calculated using the volume weighted average price of Class A common stock as reported on The Nasdaq Global Select Market, with the total cumulative shares not to exceed 19.99% of the sum of the number of outstanding shares of Class A common stock and Class B common stock as of January 24, 2025. In the event that the Class A common stock issuable under the Equity Interest Payment Agreement exceeds the aforementioned 19.99%, then subsequent payments will be made in cash for the amount in excess of 19.99%. The Company recognized interest expense of $0.2 million and $0.5 million during the three and nine months ended September 30, 2025, respectively, in connection with the Equity Interest Payment Agreement. In connection with the Equity Interest Payment Agreement, the Company agreed to pay, by issuing shares of its Class A common stock, a letter of credit extension payment as further consideration for Atlas to enter into the Equity Interest Payment Agreement and maintain the letters of credit. On January 29, 2025, the Company issued 752,742 shares of Class A common stock to settle the letter of credit extension payment. The aggregate fair value of the Class A common stock issued was $1.4 million. On April 8, 2025, the Company issued an additional 90,954 shares of Class A common stock to settle the equity interest payment for Q1 2025, of which the fair value of the Class A common stock issue was $0.1 million. On July 2, 2025, the Company issued an additional 131,937 shares of Class A common stock to settle the equity interest payment for the second quarter of 2025, of which the fair value of the Class A common stock issued was $0.2 million. On October 9, 2025 the Company issued an additional 102,286 shares of Class A common stock , of which the fair value was $0.2 million, for a cumulative total of 1,077,919 shares of Class A common stock issued pursuant to the Equity Interest Payment Agreement as of the filing date of this report, with an aggregate fair value of $1.9 million, which was recognized as interest expense in the consolidated statements of operations and comprehensive loss. Other Affiliates of Atlas from time to time incur certain costs for the benefit of Greenidge, which are fully reimbursed by Greenidge. Greenidge did not reimburse Atlas or its affiliates for any such costs during the three and nine months ended September 30, 2025.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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-Paragraph 1
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
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-Section 50
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
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-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483326/850-10-50-1

+ Details

COMMITMENTS AND CONTINGENCIES	9 Months Ended
COMMITMENTS AND CONTINGENCIES	Sep. 30, 2025
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Legal Matters From time to time, the Company may be involved in various lawsuits and legal proceedings that arise in the ordinary course of business. However, litigation is subject to inherent uncertainties, and an adverse result in such matters may arise and harm the Company’s business. Except as otherwise disclosed in this Note 10, “Commitments and Contingencies—Legal Matters”, including, without limitation, the subsection titled “Title V Air Permit Renewal Litigation,” the Company is currently not aware of any such legal proceedings or claims that it believes will have a material adverse effect on its business, financial condition, or operating results. Title V Air Permit Renewal Litigation In late June 2022, the New York State Department of Environmental Conservation (“NYSDEC”) announced its denial of the Title V Air Permit renewal application (the “Renewal Application”) for the Company’s New York Facility. The Company filed a notice with NYSDEC in July 2022 requesting a hearing on NYSDEC’s decision as part of its efforts to secure a new permit. In September 2023, the administrative law judge presiding over the hearing issued a ruling (the “Issues Ruling”) with respect to the status of the parties and certain issues to be adjudicated in the hearing. The Company submitted an interim appeal with NYSDEC thereafter challenging such ruling with a motion to stay the broader appeals process while the interim appeal was being resolved. On May 8, 2024, the Company’s interim appeal to NYSDEC and request for an adjudicatory hearing were ultimately denied, and the June 2022 non-renewal of the Company’s Title V Air Permit was affirmed by NYSDEC’s Regional Director for Region 7 (the “Regional Director”), which rendered NYSDEC’s decision final for purposes of seeking judicial review. On August 15, 2024, the Company filed a verified petition and complaint pursuant to Article 78 of the New York Civil Practice Law and Rules against NYSDEC in New York Supreme Court, Yates County (the "Court"), seeking declaratory and injunctive relief relating to NYSDEC’s denial of the Renewal Application for the New York Facility, including, among other things, to (i) annul NYSDEC’s June 2022 denial of the Renewal Application and the May 8, 2024 affirmation of such denial by the Regional Director; (ii) issue certain declaratory judgments with respect to NYSDEC’s interpretation of the New York Climate Leadership and Community Protection Act on which the denial of the Renewal Application was predicated; and (iii) enjoin NYSDEC from taking any action to request that the New York Facility cease operations. On August 20, 2024, the Company submitted a motion to the Court by Order to Show Cause seeking a temporary restraining and preliminary injunction (the “TRO Request”) permitting the New York Facility to continue operations during the pendency of the Article 78 proceeding. Subsequent to submission of the TRO Request, Greenidge and NYSDEC agreed to a briefing schedule with the respect to the TRO Request, with a hearing before the Court which occurred in late October 2024. In connection with the agreed-upon briefing schedule, NYSDEC agreed that Greenidge need not (i) cease operations of any air contamination sources located at the New York Facility, (ii) render such air contamination sources inoperable, or (iii) relinquish the Title V Air Permit until November 1, 2024 (the “November 1 Stay”). On October 29, 2024, a hearing was held before the Court and a stipulation on the record was entered into between the Company and NYSDEC, agreeing to extend the November 1 Stay through November 14, 2024 (the “November 14 Stay”). On November 14, 2024, the Court issued a decision (the “November 14 Decision”) on the Article 78 proceeding (i) annulling the denial of the Renewal Application and NYSDEC’s order to shut down the New York Facility; (ii) finding that, in utilizing its authority to issue the denial of the Renewal Application, NYSDEC acted in a manner that was both affected by errors of law and arbitrary and capricious; and (iii) remanding the matter to NYSDEC for further proceedings consistent with the November 14 Decision. On December 13, 2024, the Company filed a notice of appeal with the Appellate Division of the Supreme Court of the State of New York, Fourth Judicial Department (the “Fourth Department”), appealing the November 14 Decision to the extent that the Court: (i) erred in holding that NYSDEC had the authority to deny the Renewal Application pursuant to Section 7(2) of the Climate Leadership and Community Protection Act (“CLCPA”) and Part 621 of Title 6 of the New York Code of Rules & Regulations; (ii) failed to define the term “statement of justification” or declare the scope of analysis required by that Section 7(2) requirement, which definition and scope was a critical component of Greenidge’s Article 78 challenge of NYSDEC’s Final Decision, and was included in Greenidge’s request for declaratory judgment; (iii) erred in holding that the analytical framework required by Section 7(2) of the CLCPA can be compartmentalized, such that NYSDEC need not even consider mitigation proposals with respect to its inconsistency analysis or as to the purported “justification” element of the CLCPA; and (iv) erred in finding that NYSDEC’s determination, that approving the Renewal Application would be inconsistent with the CLCPA, was rational, which appeal was perfected by the Company on June 14, 2025 and is scheduled to be heard during the Fourth Department’s term commencing January 2026 (subject to such appeal's withdrawal discontinuance pursuant to the terms of the Stipulation, as defined and described below). Prior to that time, on December 9, 2024, the Administrative Law Judge (“ALJ”) assigned to the Greenidge administrative proceedings before NYSDEC’s Office of Hearings and Mediation Services (“OHMS”) notified the parties of its intent to hold a status conference given the Court’s remittance of the matter back to NYSDEC, which was held on December 16, 2024. On December 19, 2024, the Company submitted a motion by Order to Show Cause to the Court requesting a stay of NYSDEC’s administrating proceedings with respect to the Renewal Application, which was denied on January 24, 2025. On January 27, 2025, the Company submitted a motion by Order to Show Cause to the Fourth Department requesting a stay of NYSDEC’s administrating proceedings with respect to the Renewal Application, which motion was denied on February 24, 2025. On February 7, 2025, the Company submitted a renewed appeal (the “Renewed Appeal”) of the Issues Ruling to NYSDEC’s Commissioner, and further appealed the ALJ’s determination that the Renewal Application must proceed to an adjudicatory hearing rather than revert back to NYSDEC Staff. On March 31, 2025, the Regional Director issued an interim decision with respect to the Renewed Appeal (i) affirming the full party status of each of Seneca Lake Guardian, The Committee to Preserve the Finger Lakes, Fossil Free Tompkins and Sierra Club-Atlantic Chapter (the “Third-Party Intervenors”) and (ii) remanding the Renewal Application to OHMS for the purpose of holding an adjudicatory hearing with respect to the nature and extent of the required statement of justification, as well as the extent and type of mitigation measures, each as required by Section 7(2) of the CLCPA. On July 31, 2025, the ALJ granted a joint request by the Company and NYSDEC for an adjournment on the hearing scheduled to commence on August 5, 2025, solely on the issue of justification, to November 18, 2025 and hearing dates for the remaining adjudicable issues expected to continue through January 2026 (subject to discontinuance pursuant to the terms of the Stipulation, as defined and described below). On August 11, 2025, the Third-Party Intervenors submitted a motion to the ALJ to expedite the administrative hearing with respect to justification to dates in September or October 2025, which was denied. Stipulation of Settlement with NYSDEC On November 7, 2025, the Company entered into a Stipulation of Settlement (the “Stipulation”) with NYSDEC, which provides a pathway to resolving ongoing administrative and judicial proceedings concerning renewal of the Company’s Title V Air Permit for the New York Facility consistent with the CLCPA. Pursuant to the terms of the Stipulation, the Company submitted to NYSDEC an application (the “Application”), supplementing the Renewal Application to modify and renew its existing Title V Air Permit to incorporate new greenhouse gas (“GHG”) emissions limits and related monitoring and reporting requirements set forth in the Stipulation. Pursuant to the terms of the Stipulation, NYSDEC agreed to process the Application pursuant to the New York State Uniform Procedures Act and 6 NYCRR Part 621, and issue a draft Title V permit modification and renewal (the “Draft Title V Permit”) that includes substantially the same conditions as the Renewal Application and the GHG limits and reporting obligations agreed upon in the Stipulation. The Draft Title V Permit will be subject to a public notice and comment period in addition to a 45-day review period by the U.S. Environmental Protection Agency. Upon completion of the administrative process and withdrawal of Greenidge’s pending appeal before the Fourth Department, NYSDEC will issue a final Title V Air Permit consistent with the GHG emission limits set forth in Schedule 1 of the Stipulation. The Company’s existing Title V Air Permit remains valid pursuant to Section 401(2) of the New York State Administrative Procedure Act throughout the administrative process set forth in the Stipulation. On November 12, 2025, the Third-Party Intervenors delivered a letter to the ALJ objecting to the Stipulation and alleging that the Stipulation, among other things, (i) is procedurally improper because it was negotiated without adequate notice to, or participation by, the Third-Party Intervenors and was entered into without the consent, or a full briefing, of all parties to the administrative hearing; (ii) fails to establish that the proposed Title V Air Permit modification ensures consistency with the CLCPA or moots issues raised in the administrative proceeding; and (iii) contradicts the finality of NYSDEC’s denial of the Renewal Application by purporting to modify the draft Title V Air Permit submitted in connection therewith. The Company’s attempts to secure a new permit or to renew its existing permit (as modified by the Stipulation), and the associated legal and administrative challenges, have caused, and may continue, to cause the Company to incur additional costs and result in the diversion of management attention, which could adversely affect the Company’s business, financial condition and results of operations. The Stipulation halts these proceedings and provides a pathway to renewal of the Title V Air Permit; however, there can be no assurance of successful final issuance of a Title V Air Permit, compliance with the newly stipulated GHG limits, or the absence of third-party challenges before, during or after the public comment period. The Company’s inability to succeed in securing a Title V Air Permit for the New York Facility could have a material adverse effect on the Company’s business, financial condition, and operating results, and its ability to meet its long-term debt obligations. See also Note 2, “Summary of Significant Accounting Policies” for additional information. Environmental Liabilities The Company has a coal combustion residual (“CCR”) liability associated with the closure of a coal ash pond located on the Company’s property in Torrey, New York. In accordance with ASC 410-30, the Company has a liability of $17.3 million as of September 30, 2025 and December 31, 2024. CCRs are subject to federal and state requirements. In October 2023, the Company completed the necessary steps to officially cease use of the coal ash pond. Following this occurring, the Company was required to complete the remediation of the coal ash pond CCR by November 2028 and will perform the work in stages over the next four years. On October 1, 2025, the Company provided a beneficial use demonstration to support a two-year extension of the deadline to initiate closure. With this two-year extension, the deadline for Greenidge to either initiate closure of the C-Pond or to demonstrate the need for an additional two-year extension under 40 C.F.R. § 257.102(e)(2)(ii) will be October 10, 2027. Beneficial use is the recycling or reuse of CCR in lieu of disposal by landfill and is most commonly used in the production of concrete and certain other building materials. The Company has completed initial chemical composition testing to support that it meets the requirements for beneficial use cases, which could eliminate the landfill disposal expenses, but would not alter the closure by removal plan. Further economic and viability analysis is required in order to initiate a material change to the closure plan and therefore no changes to the liability or closure plan assumptions have been made as of September 30, 2025. Estimates are based on various assumptions including, but not limited to, closure and post-closure cost estimates, timing of expenditures, escalation factors, and requirements of granted permits. Additional adjustments to the environment liability may occur periodically due to changes in remediation requirements regarding CCRs or the potential for beneficial use thereof which the Company is currently exploring, each of which may lead to material changes in estimates and assumptions. The Company owns and operates a fully permitted landfill that also acts as a leachate treatment facility. In accordance with ASC 410-30, Environmental Obligations (“ASC 410-30”), the Company has recorded an environmental liability of $13.4 million as of September 30, 2025 and December 31, 2024. As required by NYSDEC, companies with landfills are required to fund a trust to cover closure costs and expenses after the landfill has stopped operating or, in lieu of a trust, may negotiate to maintain a letter of credit guaranteeing the payment of the liability. Estimates are based on various assumptions including, but not limited to, closure and post-closure cost estimates, timing of expenditures, escalation factors, and requirements of granted permits. Additional adjustments to the environment liability may occur periodically due to potential changes in estimates and assumptions. The liability has been determined based on estimated costs to remediate as well as post-closure costs which are assumed over an approximate 30-year period and assumes an annual inflation rate of 2.3%. The Company deposited $1.3 million into a trust during the first quarter of 2025 in connection with the environmental liabilities, which is presented in other long-term assets in the consolidated balance sheet. Commitments The Company entered into a contract with Empire Pipeline Incorporated (“Empire”) in September 2020 which provides for the transportation to its pipeline of 15,000 dekatherms of natural gas per day, approximately $0.2 million per month. The contract ends in September 2030 and may be terminated by either party with 12 months’ notice after the initial 10-year period. In January 2024, the Company entered into a five-year capacity lease agreement, which provides the Company with 7.5 MW of self-mining capacity. The Company began mining in April 2024. During the nine months ended September 30, 2025, the Company recognized $2.9 million of variable costs in connection with the capacity lease agreement, which is included within Cost of revenue - cryptocurrency mining (exclusive of depreciation) in the consolidated statements of operations and comprehensive loss. There was no variable lease cost in connection with the capacity lease agreement during the nine months ended September 30, 2024. Effective March 31, 2025, the Company concluded that the portion of the contract consideration became fixed, creating a required minimum usage of 7.5 MW at a cost of $58.50 per MWh. As such, the Company re-assessed and re-allocated consideration in the contract to separate lease components and the non-lease components using relative standalone prices. The Company concluded that the portion of the contract consideration allocated to the lease component was de minimis and, therefore, no ROU asset and lease liability were recorded in the consolidated balance sheets. In June 2024, the Company entered into an operating lease, which has a term of five years. The Company recorded a ROU asset and lease liability of $0.2 million, which are included in Other long-term assets and Other long-term liabilities, respectively, upon commencement of such operating lease in August 2024.

RELATED PARTY TRANSACTIONS (Details) $ in Thousands							3 Months Ended		9 Months Ended		10 Months Ended
RELATED PARTY TRANSACTIONS (Details) $ in Thousands	Oct. 09, 2025 USD ($) shares	Jul. 02, 2025 USD ($) shares	Apr. 08, 2025 USD ($) shares	Jan. 29, 2025 USD ($) shares	Jan. 24, 2025 USD ($)	Apr. 10, 2024 USD ($) a ft² MW	Sep. 30, 2025 USD ($) a MW	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) a MW	Sep. 30, 2024 USD ($)	Nov. 12, 2025 USD ($) shares	Aug. 01, 2025 a ft²	May 28, 2025 a	Dec. 31, 2024 USD ($)
Related Party Transaction [Line Items]
Area of land (in acres) \| a						12	152		152			5.6	34
Warehouse space (in square feet) \| ft²						73,000						73,000
Purchase price of land						$ 1,450
Power associated with acquired facility \| MW						32.5
Miners deployed to new facility \| MW							8.5		8.5
Interest expense							$ 244	$ 1,832	$ 3,857	$ 5,439
Debt Exchange Agreements
Related Party Transaction [Line Items]
Total cumulative shares, maximum percentage allowed for issue					19.99%
Interest expense							200		500
Common Class A \| Debt Exchange Agreements
Related Party Transaction [Line Items]
Issuance of shares in connection with equity interest payment agreement (in shares) \| shares		131,937	90,954	752,742
Stock issued during period, value, debt modification amendment fee		$ 200	$ 100	$ 1,400
Common Class A \| Debt Exchange Agreements \| Subsequent Event
Related Party Transaction [Line Items]
Issuance of shares in connection with equity interest payment agreement (in shares) \| shares	102,286										1,077,919
Stock issued during period, value, debt modification amendment fee	$ 200										$ 1,900
Letter of Credit \| Debt Exchange Agreements
Related Party Transaction [Line Items]
Interest rate					8.50%
Atlas Holdings LLC \| Debt Exchange Agreements
Related Party Transaction [Line Items]
Letters of credit outstanding					$ 8,600
NYSDEC \| Atlas Holdings LLC
Related Party Transaction [Line Items]
Letters of credit outstanding							5,000		5,000					$ 5,000
Empire Pipeline Incorporated \| Atlas Holdings LLC
Related Party Transaction [Line Items]
Letters of credit outstanding							$ 3,600		$ 3,600					$ 3,600
Greenidge Generation Holdings Inc \| Atlas Holdings LLC And Affiliates
Related Party Transaction [Line Items]
Voting power of outstanding capital stock (as percent)							70.00%		70.00%

STOCKHOLDERS' DEFICIT - Narrative (Details) - USD ($)										3 Months Ended		9 Months Ended	10 Months Ended	12 Months Ended		36 Months Ended
STOCKHOLDERS' DEFICIT - Narrative (Details) - USD ($)	Oct. 09, 2025	Jul. 02, 2025	Apr. 08, 2025	Jan. 29, 2025	Jan. 24, 2025	Sep. 24, 2024	Jul. 30, 2024	Feb. 12, 2024	Oct. 03, 2022	Sep. 30, 2025	Mar. 31, 2024	Sep. 30, 2025	Nov. 12, 2025	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2025	Aug. 14, 2024
Class of Stock [Line Items]
Common stock issuance upon exercise of prefunded warrant (in shares)															810,205
Issuance of warrants to advisor in connection with completion of merger											$ 4,866,000
Warrants issued (in shares)												0
Senior Notes \| Senior Notes
Class of Stock [Line Items]
Interest rate										8.50%		8.50%		8.50%		8.50%
February 2024 Pre-Funded Warrant
Class of Stock [Line Items]
Warrants outstanding (in shares)								810,205
Issuance of warrants to advisor in connection with completion of merger								$ 2,000,000
Common Stock Warrant
Class of Stock [Line Items]
Issuance of warrants to advisor in connection with completion of merger								$ 2,800,000
Common Stock Purchase Agreement
Class of Stock [Line Items]
Maximum aggregate consideration to be received on transaction							$ 20,000,000
Sale of stock, period							36 months
Number of shares issued in transaction (in shares)						7,300,000				0		0		1,595,855
Net proceeds received														$ 4,300,000
At The Market Issuance Sales Agreement
Class of Stock [Line Items]
Maximum aggregate consideration to be received on transaction									$ 22,800,000
Number of shares issued in transaction (in shares)										0		0				4,167,463
Net proceeds received																$ 20,700,000
Underwriter compensation, percentage of gross stock sales									3.00%
Securities Purchase Agreement
Class of Stock [Line Items]
Number of shares issued in transaction (in shares)								450,300
Net proceeds received								$ 6,000,000
Sale of stock, price (in dollars per share)								$ 4.76
Exercise price (in dollars per share)								$ 0.0001									$ 5.25
Warrant term								5 years
Number of securities called by warrants (in shares)																	1,260,505
Debt Exchange Agreements
Class of Stock [Line Items]
Number of shares issued in transaction (in shares)												1,242,456
Total cumulative shares, maximum percentage allowed for issue					19.99%
Debt Exchange Agreements \| Common Class A
Class of Stock [Line Items]
Stock issued during period, value, debt modification amendment fee		$ 200,000	$ 100,000	$ 1,400,000
Issuance of shares in connection with equity interest payment agreement (in shares)		131,937	90,954	752,742
Debt Exchange Agreements \| Common Class A \| Subsequent Event
Class of Stock [Line Items]
Stock issued during period, value, debt modification amendment fee	$ 200,000												$ 1,900,000
Issuance of shares in connection with equity interest payment agreement (in shares)	102,286												1,077,919
Debt Exchange Agreements \| Senior Notes \| Senior Notes
Class of Stock [Line Items]
Stock issued during period, value, debt modification amendment fee												$ 1,500,000
Cash received in exchange												2,700,000
Debt exchanged										$ 10,500,000		$ 10,500,000		$ 10,500,000		$ 10,500,000
Debt Exchange Agreements \| Letter of Credit
Class of Stock [Line Items]
Interest rate					8.50%
Debt Exchange Agreements \| Atlas Holdings LLC
Class of Stock [Line Items]
Letters of credit outstanding					$ 8,600,000

PROPERTY AND EQUIPMENT - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 46,867	$ 54,762
Less: Accumulated depreciation	(27,132)	(24,463)
Property and equipment, net	$ 19,735	30,299
Plant infrastructure
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years
Property and equipment, gross	$ 1,522	1,522
Miners
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Property and equipment, gross	$ 32,125	36,182
Miner facility infrastructure
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years
Property and equipment, gross	$ 10,810	13,227
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,020	1,952
Equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Property and equipment, gross	$ 45	45
Construction in process
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 345	$ 1,834

EARNINGS (LOSS) PER SHARE - Basic Earnings and Diluted per Share of Common Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Numerator
Net loss, basic	$ 11,958	$ (6,367)	$ 2,276	$ (15,879)
Net loss, diluted	$ 11,958	$ (6,367)	$ 2,276	$ (15,879)
Denominator
Weighted average shares outstanding, diluted (in shares)	15,659	10,652	14,954	10,040
Effect of dilutive securities (in shares)	232	0	125	0
Diluted weighted average shares outstanding (in shares)	15,891	10,652	15,079	10,040
Net income (loss) per share:
Basic (in dollars per share)	$ 0.76	$ (0.60)	$ 0.15	$ (1.58)
Diluted (in dollars per share)	$ 0.75	$ (0.60)	$ 0.15	$ (1.58)

ASSETS HELD FOR SALE (Details) - USD ($) $ in Thousands	Nov. 27, 2024	Sep. 30, 2025	Dec. 31, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Long-term assets held for sale		$ 7,184	$ 7,184
South Carolina Datacenter \| Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received from disposal	$ 12,100
Disposal group, including discontinued operation, consideration from sale, profit participation percentage	8.00%
Discontinued operation, gain (loss) on disposal of discontinued operation, net of tax	$ 400
South Carolina Datacenter \| Discontinued Operations, Held-for-Sale or Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Long-term assets held for sale		$ 7,200	$ 7,200

STOCKHOLDERS' DEFICIT (Tables)

9 Months Ended

Sep. 30, 2025

Stockholders' Equity Note [Abstract]

Schedule of Stockholders' Equity Note, Warrants or Rights

The following table summarizes information about warrants outstanding at September 30, 2025:


	Number of Warrants Outstanding	Number of Warrants Exercisable	Exercise Price		Expiration Date
February 2024 Warrants	1,260,505	1,260,505	$	5.25	August 14, 2029

COMMITMENTS AND CONTINGENCIES (Details)	1 Months Ended		9 Months Ended
COMMITMENTS AND CONTINGENCIES (Details)	Jan. 31, 2024 MW	Sep. 30, 2020 USD ($) dth	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Nov. 07, 2025	Oct. 01, 2025	Mar. 31, 2025 $ / MWh MW	Dec. 31, 2024 USD ($)	Aug. 31, 2024 USD ($)	Jun. 30, 2024
Product Liability Contingency [Line Items]
Environmental trust liability			$ 30,432,000					$ 30,432,000
Environmental liability related to landfill, period			30 years
Annual inflation rate on environmental liability related to landfill			2.30%
Deposit in trust for environmental liability			$ 1,300,000
Purchase commitment, energy volume required per day (in dekatherm) \| dth		15,000
Purchase commitment per month		$ 200,000
Purchase commitment, termination notice period		12 months
Purchase commitment period		10 years
Mining lease term	5 years
Power of mining facility \| MW	7.5						7.5
Variable lease cost			2,900,000	$ 0
Cost per megawatt hour (in dollars per megawatt hour) \| $ / MWh							58.50
Right-of-use assets			0						$ 200,000
Lease liabilities			0						$ 200,000
Lease term										5 years
Subsequent Event
Product Liability Contingency [Line Items]
EPA public notice and comment period					45 days
Environmental liabilities beneficial use demonstration, extension period						2 years
Coal ash impoundment
Product Liability Contingency [Line Items]
Environmental liability			$ 17,300,000					17,300,000
Environmental liability, remediation period			4 years
Environmental trust liability			$ 13,400,000					$ 13,400,000

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (UNAUDITED) (Parenthetical)	12 Months Ended
	Dec. 31, 2023
Statement of Stockholders' Equity [Abstract]
Accounting standards update [Extensible Enumeration]	Accounting Standards Update 2023-08 [Member]

- Definition

Indicates amendment to accounting standards.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 105
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 9
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479343/105-10-65-9

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 105
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 9
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479343/105-10-65-9

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 105
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 9
-Subparagraph (d)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479343/105-10-65-9

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 105
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 9
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479343/105-10-65-9

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 105
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479343/105-10-65-9

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 17
-Subparagraph (d)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480336/718-10-65-17

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 17
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480336/718-10-65-17

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 17
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480336/718-10-65-17

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 17
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+ Details

ORGANIZATION AND DESCRIPTION OF BUSINESS	9 Months Ended
ORGANIZATION AND DESCRIPTION OF BUSINESS	Sep. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION AND DESCRIPTION OF BUSINESS	ORGANIZATION AND DESCRIPTION OF BUSINESS Greenidge Generation Holdings Inc., together with its subsidiaries (collectively, “Greenidge” or the “Company”) owns and operates a vertically integrated cryptocurrency datacenter and power generation company. The Company owns and operates facilities in Torrey, New York (the “New York Facility”) and Columbia, Mississippi (the “Mississippi Facility”), the latter of which was sold during the quarter ended September 30, 2025 (see Note 4, "Property and Equipment"), and operates a facility under a lease in Underwood, North Dakota (the “North Dakota Facility”). The Company generates revenue in U.S. dollars by providing hosting, power and technical support services to third-party owned bitcoin mining equipment and generates revenue in the form of bitcoin by earning bitcoin as rewards and transaction fees for supporting the global bitcoin network with application-specific integrated circuit computers (“ASICs” or “miners”) owned by the Company, which may be operated at the Company’s sites or at third-party hosting sites through short-term hosting agreements. The Company also owns and operates a 106 megawatt (“MW”) power facility that is connected to the New York Independent System Operator (“NYISO”) power grid. In addition to the electricity used “behind the meter” by the New York datacenter, the Company sells electricity to NYISO at all times when its power plant is running and increases or decreases the amount of electricity sold based on prevailing prices in the wholesale electricity market and demand for electricity.

EARNINGS (LOSS) PER SHARE (Tables)

9 Months Ended

Sep. 30, 2025

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table sets forth a reconciliation of the numerator and denominator used to compute basic and diluted net income (loss) per share of common stock (in thousands, except per share data):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2025		2024		2025		2024
Numerator


Net income (loss)	$	11,958	$	(6,367)	$	2,276	$	(15,879)
Denominator
Basic weighted average shares outstanding	15,659		10,652		14,954		10,040
Dilutive effect of service based restricted stock units	232		—		125		—

Diluted weighted average shares outstanding	15,891		10,652		15,079		10,040

Net income (loss) per share:
Basic	$	0.76	$	(0.60)	$	0.15	$	(1.58)
Diluted	$	0.75	$	(0.60)	$	0.15	$	(1.58)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following table sets forth potential shares of common stock that are not included in the diluted net loss per share calculation because to do so would be anti-dilutive for the period indicated (in thousands):


	Three Months Ended September 30,		Nine Months Ended September 30,
Anti-dilutive securities	2025	2024	2025	2024
Restricted stock units	22	160	90	160
Common shares issuable upon exercise of stock options	293	483	293	483
Common shares issuable upon exercise of warrants	1,261	1,441	1,261	1,441
Total	1,576	2,084	1,644	2,084

FAIR VALUE (Tables)

9 Months Ended

Sep. 30, 2025

Fair Value Disclosures [Abstract]

Schedule of Fair Value of Assets Measured On Recurring Basis and Fair Value Hierarchy

The following tables present information about the Company’s assets and liabilities that are measured at fair value on a recurring basis and indicate the fair value hierarchy of the valuation inputs the Company utilized to determine such fair value (in thousands):


	As of December 31, 2024
	Level 1		Level 2		Level 3		Total
Assets:
Digital assets	$	6,950	$	—	$	—	$	6,950


	As of September 30, 2025
	Level 1		Level 2		Level 3		Total
Assets:
Digital assets	$	6,118	$	—	$	—	$	6,118

DIGITAL ASSETS

9 Months Ended

Sep. 30, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

DIGITAL ASSETS

The following table presents the Company’s bitcoin holdings as of September 30, 2025 and December 31, 2024 (in thousands, except bitcoin held):


Digital assets holdings	September 30, 2025		December 31, 2024
Number of bitcoin held	53.6		74.5
Carrying basis of bitcoin	$	6,000	$	5,523
Fair Value of bitcoin	$	6,118	$	6,950

The carrying basis represents the valuation of bitcoin at the time the Company earns the bitcoin through mining activities.

The following table represents a reconciliation of the fair values of the Company’s digital assets (in thousands):


Digital assets:	Three Months Ended September 30, 2025		Nine Months Ended September 30, 2025
Beginning balance at fair value	$	7,299	$	6,950
Additions	4,178		12,639
Dispositions	(5,822)		(15,044)
Gain on digital assets	463		1,573
Ending balance	$	6,118	$	6,118

The Company’s bitcoin holdings are not subject to contractual sale restrictions. As of September 30, 2025, the Company held no other digital assets.

DIGITAL ASSETS - Schedule of Bitcoin Held (Details) $ in Thousands	Sep. 30, 2025 USD ($) bitcoin	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($) bitcoin
Goodwill and Intangible Assets Disclosure [Abstract]
Number of bitcoin held \| bitcoin	53.6		74.5
Carrying basis of bitcoin	$ 6,000		$ 5,523
Fair Value of bitcoin	$ 6,118	$ 7,299	$ 6,950

INCOME TAXES	9 Months Ended
INCOME TAXES	Sep. 30, 2025
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The income tax provision for interim periods is determined using an estimate of the annual effective tax rate, adjusted for discrete items, if any, that are taken into account in the relevant period. Each quarter, the estimate of the annual effective tax rate is updated, and if the estimated effective tax rate changes, a cumulative adjustment is made. In addition, the effect of changes in enacted tax laws or rates or tax status is recognized in the interim period in which the change occurs. The effective tax rate for the three months ended September 30, 2025 and 2024 was 0.0% and a benefit of 1.8%, respectively, and for the nine months ended September 30, 2025 and 2024 was a benefit of 2.0% and 0.7%, respectively, which was lower than the statutory rate of 21% because the Company has recognized a full valuation allowance on its deferred tax assets, as well as receiving refunds during 2025 in connection with prior tax periods and an adjustment for the New York State income tax receivable during 2024 upon the completion of the 2023 tax return. The Company continued to evaluate the realizability of deferred tax assets, due to continued reduced profitability, and concluded that a valuation allowance should continue to be recognized for any deferred tax assets generated during the quarter.

- Definition

The entire disclosure for income tax.

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+ Details

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Sep. 30, 2025
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

DEBT - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Debt Instrument [Line Items]
Amortization of debt (premium) discount and issuance costs			$ (738)	$ 825
Interest expense on Equity Interest Payment Agreement	$ 196	$ 0	1,817	0
Other interest expense	6	3	6	12
Total interest expense	244	1,832	3,857	5,439
Senior Notes
Debt Instrument [Line Items]
Contractual interest expense on Senior Notes	42	1,534	2,772	4,603
Amortization of debt (premium) discount and issuance costs	0	295	(738)	824
Total interest expense on Senior Notes	$ 42	$ 1,829	$ 2,034	$ 5,427

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Sep. 30, 2025
Accounting Policies [Abstract]
Presentation of Condensed Consolidated Financial Statements	Presentation of Condensed Consolidated Financial Statements In the opinion of Greenidge management, the accompanying condensed consolidated financial statements include all adjustments necessary for a fair presentation of the results for the interim periods presented and such adjustments are of a normal recurring nature. The results for the unaudited interim condensed consolidated statements of operations are not necessarily indicative of results to be expected for the year ending December 31, 2025 or for any future interim period. The unaudited interim condensed consolidated financial statements do not include all of the information and notes required by United States Generally Accepted Accounting Principles for complete financial statements. The accompanying condensed consolidated financial statements should be read in conjunction with the notes to the consolidated financial statements of the Company in its 2024 Annual Report on Form 10-K. Going Concern In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2014-15, Presentation of Financial Statements – Going Concern, the Company’s management evaluated whether there are conditions or events that pose risk associated with the Company's ability to continue as a going concern within one year after the date these financial statements have been issued. The Company’s consolidated financial statements have been prepared assuming that it will continue as a going concern. The Company has historically incurred operating losses and negative cash flows from operations and as of September 30, 2025 has a working capital deficit of $2.7 million. These losses were primarily the result of challenging bitcoin mining economics beginning in 2022, driven by increased energy prices and a significant decline in bitcoin prices. While the recovery in bitcoin prices and a reduction in energy costs have since improved mining economics, these gains have been partially offset by increased mining difficulty and by the April 19, 2024 halving, which reduced miner rewards. The Company’s projected operating cash flows are not sufficient to meet the existing debt obligations, specifically the remaining $38.4 million aggregate principal amount of the Company's 8.50% Senior Notes due in October 2026 (the “Senior Notes”), which mature on October 31, 2026. The potential inability to meet this debt service obligation raises substantial doubt as to the Company’s ability to continue as a going concern. As a result, the Company continues to explore a number of potential strategic alternatives with respect to the Company’s corporate or capital structure. Management has taken certain actions since 2022 to improve the Company’s liquidity, including, among other things, the sale of assets, the proceeds of which were used to extinguish $80.3 million of debt, and significant restructuring activities to materially reduce selling, general and administrative expenses. In addition to these actions taken in prior years, the Company completed the following transactions in 2025 to continue to improve its liquidity position: •On August 1, 2025, the Company entered into an Asset Purchase Agreement (the “APA”) and certain ancillary agreements to sell the Mississippi Facility, other than the adjoining 5.6 acre tract of land with over 73,000 square feet of industrial warehouse space, for $4.2 million in cash, which closed on September 16, 2025 (see Note 4, "Property and Equipment"). •During the nine months ended September 30, 2025, the Company entered into privately negotiated exchange agreements, pursuant to which it issued an aggregate of 1,242,456 shares of the Company’s Class A common stock and paid an aggregate of $2.7 million in cash in exchange for $10.5 million in aggregate principal amount of the Senior Notes. •During the three months ended September 30, 2025, the Company completed two separate tender/exchange offers (the “Tender/Exchange Offers”), each of which consisted of separate concurrent offers to purchase for cash, or issue a new series of 10.00% Senior Notes due 2030 (the “New Notes”) in exchange for, its outstanding 8.50% Senior Notes. Pursuant to the Tender/Exchange Offers, the Company purchased $14.7 million in aggregate principal amount of the Senior Notes for a total of $5.5 million in cash and exchanged $4.9 million in aggregate principal amount of the Senior Notes for $2.2 million in aggregate principal amount of the New Notes. Following the conclusion of the privately negotiated exchanges and Tender/Exchange Offers, the Company had $38.4 million and $4.1 million in aggregate principal amount and capitalized contractual interest payments, respectively, in connection with the Senior Notes outstanding. The Senior Notes mature on October 31, 2026 and payment of all outstanding principal shall be due on October 31, 2026. See Note 5, “Debt” for additional information. The Company is considering various items to address the Senior Notes obligations, including: •The retirement or purchase of its outstanding debt through cash purchases and/or exchanges for equity or other debt, which may be conducted in open-market purchases, privately negotiated transactions or other transactions. Such repurchases or exchanges, if any will be upon such terms and at such prices as the Company may determine, and will depend on prevailing market conditions, liquidity requirements, contractual restrictions and other factors. The amounts involved may be material and to the extent equity is used, dilutive. •Issuances of new debt to refinance or fully settle the existing Senior Notes. •The sale of assets, including the remaining 152 acres in Spartanburg, South Carolina (the “South Carolina Land”, which remains held for sale, and the Company anticipates completing a sale of the land within the next 12 months. The Company’s cash flow projections indicate that it will have sufficient liquidity to meet its cash requirements through the third quarter of 2026 but will not be sufficient to meet the debt payments due in October 2026. The Company’s operating cash flows are highly dependent on bitcoin mining economics commonly measured by hashprice. Increases in the price of bitcoin benefit the Company by increasing the amount of revenue earned for each bitcoin earned. Increases in the difficulty to mine a bitcoin adversely affect the Company by decreasing the number of bitcoin earned. Increases in the costs of electricity, natural gas, and emissions credits adversely affect the Company by increasing operating costs. Depending on the Company’s assumptions regarding the bitcoin hashprice and energy price inputs, the estimates of the amounts of required liquidity vary significantly. There can be no assurances that these assumptions used to estimate liquidity requirements and future cash burn rates will be correct, and the ability to be predictive is uncertain due to the limited ability to predict future bitcoin and energy prices. Additionally, the inability to procure and comply with the permits and licenses required to operate the Company’s facilities, including the Title V Air Permit for the New York Facility, which is subject to a Stipulation of Settlement but may still face legal challenges by third party environmental groups (see Note 10, “Commitments and Contingencies”), may have an adverse impact on its ability to meet cash flow forecasts. Given the uncertainty regarding the Company’s financial condition over the next 12 months from the date these financial statements were issued, the Company has concluded that there is substantial doubt about its ability to continue as a going concern for a reasonable period of time. The consolidated financial statements do not include any adjustments that might result from the outcome of this uncertainty.
Reclassifications	Reclassifications Certain prior year amounts have been reclassified to conform to the current year’s presentation.
Leases	Leases The Company accounts for leases in accordance with ASC 842. The Company determines if an arrangement is or contains a lease at contract inception. The Company recognizes a right-of-use (“ROU”) asset and a lease liability at the lease commencement date. The lease liability is initially measured at the present value of the unpaid lease payments at the lease commencement date and is subsequently measured at amortized cost using the effective interest method. As the rate implicit in the lease is not readily available, the Company uses its incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. The Company leases property for its corporate office and land used in cryptocurrency mining operations. Leases are categorized into two asset classes: corporate real estate and land - cryptocurrency mining. For the corporate real estate asset class, the Company has elected to combine lease and non-lease components. The Company excluded short-term leases having initial terms of 12 months or less as an accounting policy election and recognizes rent expense on a straight-line basis over the lease term. Lease payments included in the measurement of the lease liability comprise fixed payments. Variable lease payment amounts, such as increases in lease payments based on changes in usage, are not included in the measurement of the ROU asset or lease liability and are expensed as incurred. See Note 10, “Commitments and Contingencies” for additional information.
Recent Accounting Pronouncements, Not Yet Adopted and Recent Accounting Pronouncements, Adopted	Recent Accounting Pronouncements, Not Yet Adopted In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosure. ASU 2023-09 mostly requires, on an annual basis, disclosure of specific categories in an entity’s effective tax rate reconciliation and income taxes paid disaggregated by jurisdiction. The incremental disclosures may be presented on a prospective or retrospective basis. The ASU is effective for fiscal years beginning after December 15, 2024 with early adoption permitted. The Company is currently evaluating the impact the adoption of this ASU will have on its consolidated financial statements and disclosures. In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. ASU 2024-03 requires additional disclosures of certain costs and expenses specified in the updated guidance to provide enhanced transparency into aggregate amounts presented on the Consolidated Statements of Operations and Comprehensive Loss. In January 2025, the FASB issued ASU 2025-01, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40), which clarifies the effective date of ASU 2024-03. This guidance becomes effective for annual periods beginning after December 15, 2026, and interim periods within annual periods beginning after December 15, 2027. Early adoption is permitted. The Company is currently evaluating this guidance to determine the impact on its disclosures. In November 2024, the FASB issued ASU 2024-04, Debt—Debt with Conversion and Other Options (Subtopic 470-20): Induced Conversions of Convertible Debt Instruments. ASU 2024-04 clarifies the requirements for determining whether certain settlements of convertible debt instruments should be accounted as an induced conversion. This guidance becomes effective for annual reporting periods beginning after December 15, 2025, and interim periods within those annual reporting periods. Early adoption is permitted. The Company expects this guidance will have no impact to its consolidated financial statements. In September 2025, the FASB issued ASU 2025-06, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software. The amendments in this update remove references to software development stages and require entities to start capitalizing software costs when management has authorized and committed to funding the software project and it is probable that the project will be completed and the software will be used to perform the function intended. The update permits entities to apply the guidance on a prospective transition approach, modified transition approach or retrospective transition approach. The update is effective for all entities for annual periods beginning December 15, 2027, and for interim periods within those annual periods. Early adoption is permitted as of the beginning of an annual reporting period. The Company expects this guidance will have no impact to its consolidated financial statements. In September 2025, the FASB issued ASU 2025-07, Derivatives and Hedging (Topic 815) and Revenue from Contracts with Customers (Topic 606): Derivatives Scope Refinements and Scope Clarification for Share-Based Noncash Consideration from a Customer in a Revenue Contract. The amendments in this guidance narrow the scope to exclude certain contracts from derivative accounting in Topic 815 and clarify the accounting for share-based noncash consideration from a customer in Topic 606. The amendments in this update are effective for all entities for annual periods beginning after December 15, 2026, and interim periods within those annual periods. Early adoption is permitted. The Company expects this guidance will have no impact to its consolidated financial statements. Recent Accounting Pronouncements, Adopted In March 2025, the FASB issued ASU No. 2025-02, Liabilities (Subtopic 405): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 122, which amends the Accounting Standards Codification to remove the text of SEC Staff Bulletin (“SAB”) 121: Accounting for Obligations to Safeguard Crypto-Assets an Entity Holds for its Platform Users as it has been rescinded by the issuance of SAB 122. ASU 2025-02 is effective immediately and has not had an impact on the Company’s financial statements. In May 2025, the FASB issued ASU No. 2025-03, Business Combinations (Topic 805) and Consolidation (Topic 810): Determining the Accounting Acquirer in the Acquisition of a Variable Interest Entity, which provides updated guidance on identifying the accounting acquirer in an acquisition transaction effected primarily by exchanging equity interests when the legal acquiree is a variable interest entity that meets the definition of a business. The updates in this ASU are effective for all entities for annual reporting periods beginning after December 15, 2026, and interim periods within those annual periods. The updates require entities to apply the new guidance prospectively to any acquisition transaction that occurs after the initial application date. Early adoption is permitted as of the beginning of an interim or annual reporting period. The adoption of ASU 2025-03 did not have an effect on the Company’s financial statements. In May 2025, the FASB issued ASU No. 2025-04, Compensation—Stock Compensation (Topic 718) and Revenue from Contracts with Customers (Topic 606): Clarifications to Share-Based Consideration Payable to a Customer. The updates in this ASU include revising the definition of the term “performance condition” for share-based compensation payable to customers, elimination of the policy election permitting a grantor to account for forfeitures as they occur, clarification that share-based consideration encompasses the same instruments as share-based payment arrangements but the grantee does not need to be the supplier of goods or services to the grantor, and clarification that a grantor is required to assess the probability that an award will vest using only the guidance in Topic 718. The updates in this ASU are effective for all entities for annual reporting periods beginning after December 15, 2026, and interim periods with those annual periods. Early adoption is permitted. Either modified retrospective or a retrospective basis is permitted when applying the updated guidance upon adoption. The adoption of ASU 2025-04 did not have an effect on the Company’s financial statements. In July 2025, the FASB issued ASU 2025-05, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets. The amendments in this ASU provide all entities with a practical expedient allowing entities to assume that current conditions as of the balance sheet date do not change for the remaining life of the asset when estimating expected credit losses. Entities, other than a public business entity, that elect the practical expedient are permitted to make an accounting policy election to consider collection activity after the balance sheet date when estimating expected credit losses. This guidance becomes effective for annual periods beginning after December 15, 2025, and interim periods within those annual reporting periods. Early adoption is permitted in both interim and annual reporting periods in which financial statements have not yet been issued or made available for issuances. Application of the amendments are to be made prospectively. The Company elected to early adopt the guidance in this update effective July 1, 2025. The adoption of ASU 2025-05 did not have an effect on the Company's financial statements.

EQUITY BASED COMPENSATION - Schedule of RSAs and RSUs (Details) - RSAs & RSUs	9 Months Ended
	Sep. 30, 2025 $ / shares shares
RSAs & RSUs
Unvested, beginning balance (in shares) \| shares	131,347
Granted (in shares) \| shares	825,106
Vested (in shares) \| shares	(435,701)
Forfeited (in shares) \| shares	(37,573)
Unvested, ending balance (in shares) \| shares	483,179
Weighted Average Grant Date Fair Value
Unvested, beginning balance (in dollars per share) \| $ / shares	$ 3.31
Granted (in dollars per share) \| $ / shares	0.88
Vested (in dollars per share) \| $ / shares	1.47
Forfeited (in dollars per share) \| $ / shares	1.55
Unvested, ending balance (in dollars per share) \| $ / shares	$ 0.96

EQUITY BASED COMPENSATION (Tables)

9 Months Ended

Sep. 30, 2025

Share-Based Payment Arrangement [Abstract]

Schedule of Unvested Restricted Common Stock Unit Awards Activity

The Company’s unvested RSA and RSU award activity for the nine months ended September 30, 2025 is summarized below:


	RSAs & RSUs	Weighted Average Grant Date Fair Value
Unvested at December 31, 2024	131,347	$	3.31
Granted	825,106	$	0.88
Vested	(435,701)	$	1.47
Forfeited	(37,573)	$	1.55
Unvested at September 30, 2025	483,179	$	0.96

Schedule of Stock Options Activity

The Company’s common stock options activity for the nine months ended September 30, 2025 is summarized below:


	Options	Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Life (in years)	Aggregate Intrinsic Value
Outstanding at December 31, 2024	482,492	$	15.75


Forfeited	(61,760)	$	13.20
Expired	(128,059)	$	14.95
Outstanding at September 30, 2025	292,673	$	16.63	7.28	$	—
Exercisable as of September 30, 2025	213,507	$	21.07	6.93	$	—

FAIR VALUE

9 Months Ended

Sep. 30, 2025

Fair Value Disclosures [Abstract]

FAIR VALUE

The Company follows the guidance in ASC Topic 820, Fair Value Measurement. For assets and liabilities measured at fair value on a recurring and nonrecurring basis, a three-level hierarchy based upon observable and unobservable inputs is used to arrive at fair value. The Company uses valuation approaches that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible. The Company determines fair value based on assumptions that market participants would use in pricing an asset or liability in the principal or most advantageous market. When considering market participant assumptions in fair value measurements, the following fair value hierarchy distinguishes between observable and unobservable inputs, which are categorized in one of the following levels:

•Level 1 inputs: Unadjusted quoted prices in active markets for identical assets or liabilities accessible to the reporting entity at the measurement date.

•Level 2 inputs: Other than quoted prices included in Level 1 inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability.

•Level 3 inputs: Unobservable inputs for the asset or liability used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at measurement date.

As of September 30, 2025 and December 31, 2024, the carrying amount of accounts receivable, prepaid expenses and other assets, emissions and carbon offset credits, accounts payable, accrued expenses, accrued emissions expense, and other short-term liabilities approximated their fair value due to their relatively short maturities.


	As of December 31, 2024
	Level 1		Level 2		Level 3		Total
Assets:
Digital assets	$	6,950	$	—	$	—	$	6,950


	As of September 30, 2025
	Level 1		Level 2		Level 3		Total
Assets:
Digital assets	$	6,118	$	—	$	—	$	6,118

Assets Measured on a Nonrecurring Basis

Assets that are measured at fair value on a nonrecurring basis are remeasured when carrying value exceeds fair value. This includes the evaluation of long-lived assets. Where an indication of an impairment exists, the Company’s estimates of fair value of long-lived assets require the use of significant unobservable inputs, representative of Level 3 fair value measurements, including numerous assumptions with respect to future circumstances that might impact the long-lived assets’ operations in the future and are therefore uncertain.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 107
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-107

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 940
-SubTopic 820
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478119/940-820-50-1

+ Details

CONCENTRATIONS (Details)	3 Months Ended		9 Months Ended
CONCENTRATIONS (Details)	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Concentration Risk [Line Items]
Termination notice period			6 months
Cryptocurrency mining
Concentration Risk [Line Items]
Revenue from contract with customer, term			1 day
Sales Revenue Net \| Customer Concentration Risk \| Data Center Customer One
Concentration Risk [Line Items]
Concentration risk percentage	41.00%	53.00%	38.00%	50.00%
Sales Revenue Net \| Customer Concentration Risk \| Operator Customer One
Concentration Risk [Line Items]
Concentration risk percentage	25.00%	26.00%	27.00%	34.00%
Sales Revenue Net \| Customer Concentration Risk \| One Major Customer
Concentration Risk [Line Items]
Concentration risk percentage	31.00%	21.00%	35.00%	16.00%
Cost of Goods and Service Benchmark \| Supplier Concentration Risk \| One Major Vendor
Concentration Risk [Line Items]
Concentration risk percentage	39.00%	33.00%	45.00%	36.00%

PROPERTY AND EQUIPMENT

9 Months Ended

Sep. 30, 2025

Property, Plant and Equipment [Abstract]

PROPERTY AND EQUIPMENT

Property and equipment, net, consisted of the following at September 30, 2025 and December 31, 2024:


$ in thousands	Estimated Useful Lives	September 30, 2025		December 31, 2024
Plant infrastructure	10 years	$	1,522	$	1,522
Miners	3 years	32,125		36,182
Miner facility infrastructure	10 years	10,810		13,227
Land	N/A	2,020		1,952
Equipment	5 years	45		45


Construction in process	N/A	345		1,834

		46,867		54,762
Less: Accumulated depreciation		(27,132)		(24,463)
		$	19,735	$	30,299

Total depreciation expense was $3.0 million and $3.4 million for the three months ended September 30, 2025 and 2024, respectively, and $9.3 million and $9.9 million for the nine months ended September 30, 2025 and 2024, respectively.

Mississippi Facility

On April 10, 2024, the Company closed on the purchase of a parcel of land containing approximately 12 acres located in Columbus, Mississippi, including over 73,000 square feet of industrial warehouse space, from a subsidiary of Motus Pivot Inc., a portfolio company of Atlas. The purchase price was $1.45 million, which the Company financed with cash on hand. On August 1, 2025, Greenidge Mississippi LLC, a wholly owned subsidiary of the Company, entered into the APA and certain ancillary agreements to sell certain assets comprising the Mississippi Facility, other than the adjoining 5.6 acre tract of land with over 73,000 square feet of industrial warehouse space, and miners to US Digital Mining Mississippi LLC, a wholly owned subsidiary of LM Funding America, Inc. (collectively, the “Buyer”), for an aggregate purchase price of $4.2 million in cash. The sale of the facility closed on September 16, 2025 and a gain of $1.8 million was recognized on the sale.

On May 28, 2025, the Company closed on the purchase of a parcel of land containing approximately 34 acres located in Columbus, Mississippi for a purchase price of $0.2 million.

Sale of Equipment

During the nine months ended September 30, 2025, Greenidge sold construction in process assets with a carrying value of $0.8 million for proceeds of $0.7 million resulting in a loss on the sale of assets of $0.1 million. No construction in process assets were sold in the three months ended September 30, 2025.

Impairment

The Company reviews its long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be fully recoverable. To determine recoverability of a long-lived asset, management evaluates whether the estimated future undiscounted net cash flows, based on prevailing market conditions, from the asset are less than its carrying amount. If impairment is indicated, the long-lived asset is written down to fair value. There were no triggering events identified as of September 30, 2025.

There were no impairment charges during the three months ended September 30, 2024. The Company recognized an impairment charge of $0.2 million of property and equipment, net, during the nine months ended September 30, 2024. The impairment was related to miners no longer viable for operation.

SUPPLEMENTAL BALANCE SHEET AND CASH FLOW INFORMATION - Schedule of Cash Flow Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Cash and Cash Equivalents [Line Items]
Accumulated deficit	$ (387,461)		$ (389,737)
Property and equipment purchases in accounts payable	34	$ 174
Common stock issued in exchange for reduction in debt	1,462	0
Shares issued to settle extension fees and accrued interest for stand-by letters of credit	1,651	0
Accrued interest added to debt principal	93	0
Sale of equipment in exchange for receivable	0	1,200
Operating leases	0	156
Cash paid for interest	4,049	4,603
Cumulative Effect, Period of Adoption, Adjustment
Cash and Cash Equivalents [Line Items]
Accumulated deficit	$ 0	$ 22

SEGMENT REPORTING - Schedule of Segment Reporting Information, by Segment (Details) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Total revenue	$ 15,220,000	$ 12,351,000	$ 47,323,000	$ 44,741,000
Selling, general and administrative	3,069,000	3,720,000	8,951,000	13,199,000
Depreciation	3,026,000	3,390,000	9,336,000	9,909,000
Impairment of long-lived assets	0	0	0	169,000
(Gain) loss on sale of assets	(1,739,000)	693,000	(1,384,000)	661,000
Gain on insurance proceeds	0	0	(399,000)	0
Interest expense, net	244,000	1,832,000	3,857,000	5,439,000
Change in fair value of warrant asset	0	0	0	420,000
Loss on liquidation of subsidiary	0	0	348,000	0
Gain on troubled debt restructuring	(11,496,000)	0	(11,496,000)	0
Other income, net	(402,000)	0	(421,000)	0
Benefit from income taxes	0	(118,000)	(44,000)	(118,000)
Reportable Segment
Segment Reporting Information [Line Items]
Total revenue	15,220,000	12,351,000	47,323,000	44,741,000
Natural gas expense	4,561,000	3,248,000	17,812,000	11,696,000
Electricity for mining expense	1,057,000	1,034,000	3,550,000	1,761,000
Emissions expense	2,252,000	2,666,000	7,106,000	6,154,000
Hosting fee expense	137,000	380,000	432,000	3,267,000
Other cost of revenue	3,016,000	2,029,000	8,972,000	8,267,000
Segment gross profit	4,197,000	2,994,000	9,451,000	13,596,000
Selling, general and administrative	3,069,000	3,720,000	8,951,000	13,199,000
Depreciation	3,026,000	3,390,000	9,336,000	9,909,000
Impairment of long-lived assets	0	0	0	169,000
Gain on digital assets	(463,000)	(156,000)	(1,573,000)	(204,000)
(Gain) loss on sale of assets	(1,739,000)	693,000	(1,384,000)	661,000
Gain on insurance proceeds	0	0	(399,000)	0
Interest expense, net	244,000	1,832,000	3,857,000	5,439,000
Change in fair value of warrant asset	0	0	0	420,000
Loss on liquidation of subsidiary	0	0	348,000	0
Gain on troubled debt restructuring	(11,496,000)	0	(11,496,000)	0
Other income, net	(402,000)	0	(421,000)	0
Benefit from income taxes	0	(118,000)	(44,000)	(118,000)
Segment net income (loss)	$ 11,958,000	$ (6,367,000)	$ 2,276,000	$ (15,879,000)

SUBSEQUENT EVENTS	9 Months Ended
SUBSEQUENT EVENTS	Sep. 30, 2025
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS Subsequent events have been evaluated through November 13, 2025, the date at which the condensed consolidated financial statements were available to be issued, and the Company has concluded that no such events or transactions took place that would require disclosure herein except as stated directly below. Stipulation of Settlement with NYSDEC On November 7, 2025, the Company entered into a Stipulation of Settlement with NYSDEC, providing a pathway for the issuance of a five-year Title V Air Permit for the New York Facility, consistent with the CLCPA, and resolving ongoing administrative and judicial proceedings related thereto. See Note 10, “Commitments and Contingencies—Legal Matters,” including, without limitation, the subsections titled “Title V Air Permit Renewal Litigation” and “Stipulation of Settlement with NYSDEC.” Equity Interest Payment On October 9, 2025, the Company issued an aggregate of 102,286 shares of the Company's Class A common stock to settle the interest payment obligation for the third quarter of 2025 in connection with the Equity Interest Payment Agreement, a related party transaction approved by the Company's Board of Directors. Tender/Exchange Offer On November 6, 2025, the Company announced the expiration and final results of a third tender/exchange offer (the “Third Tender/Exchange Offer”), which consisted of separate concurrent offers to purchase for cash, or issue New Notes in exchange for, its Senior Notes, which commenced on October 6, 2025. Pursuant to the Third Tender/Exchange Offer, the Company purchased $0.3 million in aggregate principal amount of the Senior Notes for a total of $0.1 million in cash and exchanged $0.1 million in aggregate principal amount of the Senior Notes for less than $0.1 million in aggregate principal amount of the New Notes. Following the conclusion of the Third Tender/Exchange Offer on November 5, 2025, the Company had $38.1 million in aggregate principal amount of Senior Notes outstanding and $2.3 million in aggregate principal amount of New Notes outstanding.

DEBT - Narrative (Details) - USD ($) $ in Thousands			3 Months Ended			9 Months Ended		12 Months Ended
DEBT - Narrative (Details) - USD ($) $ in Thousands	Nov. 06, 2025	Jul. 21, 2025	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2021	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Debt Instrument [Line Items]
Interest expense			$ 244	$ 1,832		$ 3,857	$ 5,439
Gain on troubled debt restructuring			11,496	$ 0		11,496	$ 0
Unamortized discount (premium) and debt issuance costs			0			0		$ 473
Debt Exchange Agreements
Debt Instrument [Line Items]
Interest expense			200			$ 500
Number of shares issued in transaction (in shares)						1,242,456
Senior Notes
Debt Instrument [Line Items]
Senior notes			38,400			$ 38,400
Notional value						38,400		68,500
Fair value of debt			15,300			15,300		24,800
Contractual interest payments						4,100
Unamortized discount (premium) and debt issuance costs								500
Senior Notes \| Debt Exchange Agreements \| Subsequent Event
Debt Instrument [Line Items]
Senior notes	$ 38,100
New Notes
Debt Instrument [Line Items]
Notional value						2,200
Contractual interest payments								$ 1,100
New Notes \| Debt Exchange Agreements \| Subsequent Event
Debt Instrument [Line Items]
Senior notes	2,300
Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Senior notes					$ 72,200
Aggregate principal amount			72,200			72,200
Senior Notes \| Senior Notes \| Debt Exchange Agreements
Debt Instrument [Line Items]
Senior notes			38,400			38,400
Cash received in exchange			5,500
Debt exchanged			14,700			14,700
Aggregate principal amount			4,900			4,900
Gain on troubled debt restructuring			11,500			11,500
Capitalized contractual interest payment						4,100
Senior Notes \| Senior Notes \| Debt Exchange Agreements \| Subsequent Event
Debt Instrument [Line Items]
Cash received in exchange	100
Debt exchanged	300
Aggregate principal amount	100
Senior Notes \| Senior Notes \| Debt Exchange Agreements
Debt Instrument [Line Items]
Stock issued during period, value, debt modification amendment fee						1,500
Cash received in exchange						2,700
Debt exchanged			10,500			10,500
Senior Notes \| Senior Notes \| Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage					102.00%
Senior Notes \| Senior Notes \| Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage					101.00%
Senior Notes \| Senior Notes \| Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage					100.00%
Senior Notes \| Senior Notes \| Debt Instrument, Redemption, Period Four
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage					100.50%
Senior Notes \| New Notes \| Debt Exchange Agreements
Debt Instrument [Line Items]
Senior notes			2,200			2,200
Aggregate principal amount			$ 2,200			2,200
Capitalized contractual interest payment						$ 1,100
Senior Notes \| New Notes \| Debt Exchange Agreements \| Subsequent Event
Debt Instrument [Line Items]
Aggregate principal amount	$ 100
Senior Notes \| New Notes \| Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage		102.00%
Senior Notes \| New Notes \| Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage		101.00%
Senior Notes \| New Notes \| Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage		100.00%
Senior Notes \| New Notes \| Debt Instrument, Redemption, Period Four
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage		100.50%

EARNINGS (LOSS) PER SHARE

9 Months Ended

Sep. 30, 2025

Earnings Per Share [Abstract]

EARNINGS (LOSS) PER SHARE

The Company calculates basic net income (loss) per share by dividing the net loss by the weighted average number of shares of common stock outstanding for the period. The diluted net income (loss) per share is computed by assuming the exercise, settlement, and vesting of all potential dilutive common stock equivalents outstanding for the period using the treasury stock method.

The following table sets forth a reconciliation of the numerator and denominator used to compute basic and diluted net income (loss) per share of common stock (in thousands, except per share data):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2025		2024		2025		2024
Numerator


Net income (loss)	$	11,958	$	(6,367)	$	2,276	$	(15,879)
Denominator
Basic weighted average shares outstanding	15,659		10,652		14,954		10,040
Dilutive effect of service based restricted stock units	232		—		125		—

Diluted weighted average shares outstanding	15,891		10,652		15,079		10,040

Net income (loss) per share:
Basic	$	0.76	$	(0.60)	$	0.15	$	(1.58)
Diluted	$	0.75	$	(0.60)	$	0.15	$	(1.58)

For the three and nine months ended September 30, 2024, because the Company was in a loss position, basic net loss per share is the same as diluted net loss per share, as the inclusion of the potential common shares would have been anti-dilutive.


	Three Months Ended September 30,		Nine Months Ended September 30,
Anti-dilutive securities	2025	2024	2025	2024
Restricted stock units	22	160	90	160
Common shares issuable upon exercise of stock options	293	483	293	483
Common shares issuable upon exercise of warrants	1,261	1,441	1,261	1,441
Total	1,576	2,084	1,644	2,084

DEBT - Schedule of Equipment Financing Agreements (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Total Debt	$ 45,849	$ 68,541
Less: Debt discount and issue costs	0	(473)
Total debt at book value	45,849	68,068
Less: Current portion	(3,535)	0
Long-term debt, net of deferred financing fees	$ 42,314	68,068
Senior Notes Due October 2026
Debt Instrument [Line Items]
Less: Debt discount and issue costs		(500)
Senior Notes Due October 2026 \| Senior Notes
Debt Instrument [Line Items]
Interest Rate	8.50%
Amount Financed	$ 72,200
Total Debt	$ 42,491	68,541
Senior Notes Due June 2030 \| Senior Notes
Debt Instrument [Line Items]
Interest Rate	10.00%
Amount Financed	$ 2,245
Total Debt	$ 3,358	$ 0

INCOME TAXES (Details)	3 Months Ended		9 Months Ended
INCOME TAXES (Details)	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Effective income tax rate as a percentage	0.00%	1.80%	(2.00%)	0.70%

PROPERTY AND EQUIPMENT - Narrative (Details)				3 Months Ended		9 Months Ended
PROPERTY AND EQUIPMENT - Narrative (Details)	Sep. 16, 2025 USD ($)	May 28, 2025 USD ($) a	Apr. 10, 2024 USD ($) a ft²	Sep. 30, 2025 USD ($) a	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) a	Sep. 30, 2024 USD ($)	Aug. 01, 2025 a ft²
Property, Plant and Equipment [Line Items]
Depreciation expense				$ 3,000,000	$ 3,400,000	$ 9,300,000	$ 9,900,000
Area of land (in acres) \| a		34	12	152		152		5.6
Payments to acquire land		$ 200,000	$ 1,450,000
Warehouse space (in square feet) \| ft²			73,000					73,000
(Gain) loss on sale of assets				$ (1,739,000)	693,000	$ (1,384,000)	661,000
Impairment of long-lived assets				0	$ 0	0	$ 169,000
Disposal Group, Held-for-Sale, Not Discontinued Operations \| Mississippi Facility
Property, Plant and Equipment [Line Items]
Proceeds from sale of property, plant and equipment	$ 4,200,000
Disposal group, not discontinued operation, gain (loss) on disposal	$ 1,800,000
Construction in process
Property, Plant and Equipment [Line Items]
Proceeds from sale of property, plant and equipment						700,000
Property, plant and equipment sold						800,000
(Gain) loss on sale of assets						$ 100,000
Payments for construction in process				$ 0

EARNINGS (LOSS) PER SHARE - Antidilutive Securities (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share amount (in shares)	1,576	2,084	1,644	2,084
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share amount (in shares)	22	160	90	160
Common shares issuable upon exercise of stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share amount (in shares)	293	483	293	483
Common shares issuable upon exercise of warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share amount (in shares)	1,261	1,441	1,261	1,441

SUPPLEMENTAL BALANCE SHEET AND CASH FLOW INFORMATION - Schedule of Contract Liability (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2025 USD ($)
Contract With Customer, Liability [Roll Forward]
Balance as of December 31, 2024	$ 2,339
Revenue recognized	(2,339)
Deposits received	2,147
Balance as of September 30, 2025	$ 2,147

SUBSEQUENT EVENTS (Details) - USD ($) $ in Thousands							3 Months Ended	9 Months Ended	10 Months Ended
SUBSEQUENT EVENTS (Details) - USD ($) $ in Thousands	Nov. 07, 2025	Nov. 06, 2025	Oct. 09, 2025	Jul. 02, 2025	Apr. 08, 2025	Jan. 29, 2025	Sep. 30, 2025	Sep. 30, 2025	Nov. 12, 2025	Dec. 31, 2021
Common Class A \| Debt Exchange Agreements
Subsequent Event [Line Items]
Issuance of shares in connection with equity interest payment agreement (in shares)				131,937	90,954	752,742
Subsequent Event
Subsequent Event [Line Items]
Loss contingency, settlement agreement, term	5 years
Subsequent Event \| Common Class A \| Debt Exchange Agreements
Subsequent Event [Line Items]
Issuance of shares in connection with equity interest payment agreement (in shares)			102,286						1,077,919
Senior Notes Due October 2026
Subsequent Event [Line Items]
Senior notes							$ 38,400	$ 38,400
Senior Notes Due October 2026 \| Senior Notes
Subsequent Event [Line Items]
Amount Financed							72,200	72,200
Senior notes										$ 72,200
Senior Notes Due October 2026 \| Senior Notes \| Debt Exchange Agreements
Subsequent Event [Line Items]
Debt exchanged							10,500	10,500
Cash received in exchange								2,700
Debt Exchange Agreements \| Senior Notes Due October 2026 \| Subsequent Event
Subsequent Event [Line Items]
Senior notes		$ 38,100
Debt Exchange Agreements \| Senior Notes Due October 2026 \| Senior Notes
Subsequent Event [Line Items]
Debt exchanged							14,700	14,700
Cash received in exchange							5,500
Amount Financed							4,900	4,900
Senior notes							38,400	38,400
Debt Exchange Agreements \| Senior Notes Due October 2026 \| Senior Notes \| Subsequent Event
Subsequent Event [Line Items]
Debt exchanged		300
Cash received in exchange		100
Amount Financed		100
Debt Exchange Agreements \| New Notes \| Subsequent Event
Subsequent Event [Line Items]
Senior notes		2,300
Debt Exchange Agreements \| New Notes \| Senior Notes
Subsequent Event [Line Items]
Amount Financed							2,200	2,200
Senior notes							$ 2,200	$ 2,200
Debt Exchange Agreements \| New Notes \| Senior Notes \| Subsequent Event
Subsequent Event [Line Items]
Amount Financed		$ 100

EQUITY BASED COMPENSATION - Schedule of Common Stock Options (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2025 USD ($) $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract]
Exercisable, weighted average remaining contractual life as of end of period	6 years 11 months 4 days
Outstanding, aggregate intrinsic value as of end of period \| $	$ 0
Common shares issuable upon exercise of stock options
Options
Outstanding, beginning balance (in shares) \| shares	482,492
Forfeited (in shares) \| shares	(61,760)
Expired (in shares) \| shares	(128,059)
Outstanding, ending balance (in shares) \| shares	292,673
Exercisable as of end of period (in shares) \| shares	213,507
Weighted Average Exercise Price Per Share
Weighted average exercise price per share, beginning balance (in dollars per share) \| $ / shares	$ 15.75
Weighted average exercise price per share forfeited (in dollars per share) \| $ / shares	13.20
Weighted average exercise price per share, expired (in dollars per share) \| $ / shares	14.95
Weighted average exercise price per share, ending balance (in dollars per share) \| $ / shares	16.63
Exercisable as of end of period (in dollars per share) \| $ / shares	$ 21.07
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, weighted average remaining contractual life as of end of period	7 years 3 months 10 days
Exercisable, aggregate intrinsic value, as of end of period \| $	$ 0

SUPPLEMENTAL BALANCE SHEET AND CASH FLOW INFORMATION

9 Months Ended

Sep. 30, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

SUPPLEMENTAL BALANCE SHEET AND CASH FLOW INFORMATION

Contract liabilities

At times, the Company receives payments from customers before revenue is recognized, resulting in the recognition of a contract liability presented on the Condensed Consolidated Balance Sheets.

Changes in the Contract liability balance for the nine months ended September 30, 2025 were as follows:


$ in thousands	Contract Liabilities
Balance as of December 31, 2024	$	2,339
Revenue recognized	(2,339)
Deposits received	2,147
Balance as of September 30, 2025	$	2,147

Prepaid expenses and accrued expenses


$ in thousands	September 30, 2025		December 31, 2024
Prepaid expenses:
Electric deposits	$	588	$	588
Prepaid insurance	1,304		1,279


Other	719		750
Total	$	2,611	$	2,617

Accrued expenses:
Accrued interest	$	—	$	974
Other	4,108		3,258
Total	$	4,108	$	4,232

Greenidge had the following noncash investing and financing activities:


	Nine Months Ended September 30,
$ in thousands	2025		2024
Cumulative-effect adjustment due to the adoption of ASU 2023-08	$	—	$	22
Property and equipment purchases in accounts payable	$	34	$	174
Common stock issued in exchange for reduction in debt	$	1,462	$	—
Shares issued to settle extension fees and accrued interest for stand-by letters of credit	$	1,651	$	—
Accrued interest added to principal of Senior Notes due 2030	$	93	$	—
Sale of equipment in exchange for receivable	$	—	$	1,200


Right-of-use asset obtained in exchange for operating lease liability	$	—	$	156

The following table provides supplemental cash flow information for cash paid for interest:


	Nine Months Ended September 30,
$ in thousands	2025		2024
Cash paid for interest	$	4,049	$	4,603

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ DEFICIT (UNAUDITED) - USD ($) $ in Thousands	Total	Securities Purchase Agreement	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Common Stock Securities Purchase Agreement	Additional Paid - In Capital	Additional Paid - In Capital Securities Purchase Agreement	Subscription Receivable	Cumulative Translation Adjustment	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
Stockholders' equity, beginning balance (in shares) at Dec. 31, 2023				9,131,252
Stockholders' equity, beginning balance at Dec. 31, 2023	$ (51,024)		$ 22	$ 1		$ 319,992		$ (698)	$ (345)	$ (369,974)	$ 22
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense (benefit)	1,070					1,070
Issuance of shares in connection with equity interest payment agreement (in shares)				45,269	450,300
Issuance of shares in connection with Equity Interest Payment Agreement	1,038	$ 1,133				340	$ 1,133	698
Restricted shares award issuance (in shares)				159,357
Issuance of warrants in connection with Securities Purchase Agreement	4,866					4,866
Foreign currency translation adjustment	(3)								(3)
Net income (loss)	(3,944)									(3,944)
Stockholders' equity ending balance (in shares) at Mar. 31, 2024				9,786,178
Stockholders equity, ending balance at Mar. 31, 2024	(46,842)			$ 1		327,401		0	(348)	(373,896)
Stockholders' equity, beginning balance (in shares) at Dec. 31, 2023				9,131,252
Stockholders' equity, beginning balance at Dec. 31, 2023	(51,024)		22	$ 1		319,992		(698)	(345)	(369,974)	22
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification of foreign currency translation adjustment realized upon liquidation of foreign subsidiary	0
Foreign currency translation adjustment	(3)
Net income (loss)	(15,879)
Stockholders' equity ending balance (in shares) at Sep. 30, 2024				10,671,337
Stockholders equity, ending balance at Sep. 30, 2024	(58,049)			$ 1		328,129		0	(348)	(385,831)
Stockholders' equity, beginning balance (in shares) at Dec. 31, 2023				9,131,252
Stockholders' equity, beginning balance at Dec. 31, 2023	$ (51,024)		$ 22	$ 1		319,992		(698)	(345)	(369,974)	$ 22
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issuance upon exercise of prefunded warrant (in shares)	810,205
Stockholders' equity ending balance (in shares) at Dec. 31, 2024	13,025,627			13,025,627
Stockholders equity, ending balance at Dec. 31, 2024	$ (55,754)			$ 1		334,330		0	(348)	(389,737)
Stockholders' equity, beginning balance (in shares) at Mar. 31, 2024				9,786,178
Stockholders' equity, beginning balance at Mar. 31, 2024	(46,842)			$ 1		327,401		0	(348)	(373,896)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense (benefit)	311					311
Common stock issuance upon exercise of prefunded warrant (in shares)				810,205
Restricted shares award issuance (in shares)				27,604
Net income (loss)	(5,568)									(5,568)
Stockholders' equity ending balance (in shares) at Jun. 30, 2024				10,623,987
Stockholders equity, ending balance at Jun. 30, 2024	(52,099)			$ 1		327,712		0	(348)	(379,464)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense (benefit)	417					417
Restricted shares award issuance (in shares)				47,350
Reclassification of foreign currency translation adjustment realized upon liquidation of foreign subsidiary	0
Foreign currency translation adjustment	0
Net income (loss)	(6,367)									(6,367)
Stockholders' equity ending balance (in shares) at Sep. 30, 2024				10,671,337
Stockholders equity, ending balance at Sep. 30, 2024	$ (58,049)			$ 1		328,129		0	(348)	(385,831)
Stockholders' equity, beginning balance (in shares) at Dec. 31, 2024	13,025,627			13,025,627
Stockholders' equity, beginning balance at Dec. 31, 2024	$ (55,754)			$ 1		334,330		0	(348)	(389,737)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense (benefit)	543					543
Issuance of shares in connection with equity interest payment agreement (in shares)				752,742
Issuance of shares in connection with Equity Interest Payment Agreement	1,370					1,370
Restricted shares award issuance (in shares)				303,549
Issuance of shares in connection with debt exchange agreements (in shares)				643,456
Issuance of shares in connection with Debt Exchange Agreements	815					815
Reclassification of foreign currency translation adjustment realized upon liquidation of foreign subsidiary	348								348
Net income (loss)	(5,564)									(5,564)
Stockholders' equity ending balance (in shares) at Mar. 31, 2025				14,725,374
Stockholders equity, ending balance at Mar. 31, 2025	$ (58,242)			$ 1		337,058		0	0	(395,301)
Stockholders' equity, beginning balance (in shares) at Dec. 31, 2024	13,025,627			13,025,627
Stockholders' equity, beginning balance at Dec. 31, 2024	$ (55,754)			$ 1		334,330		0	(348)	(389,737)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification of foreign currency translation adjustment realized upon liquidation of foreign subsidiary	348
Foreign currency translation adjustment	0
Net income (loss)	$ 2,276
Stockholders' equity ending balance (in shares) at Sep. 30, 2025	15,679,417			15,679,417
Stockholders equity, ending balance at Sep. 30, 2025	$ (49,408)			$ 1		338,052		0	0	(387,461)
Stockholders' equity, beginning balance (in shares) at Mar. 31, 2025				14,725,374
Stockholders' equity, beginning balance at Mar. 31, 2025	(58,242)			$ 1		337,058		0	0	(395,301)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense (benefit)	378					378
Issuance of shares in connection with equity interest payment agreement (in shares)				90,954
Issuance of shares in connection with Equity Interest Payment Agreement	119					119
Restricted shares award issuance (in shares)				83,807
Issuance of shares in connection with debt exchange agreements (in shares)				599,000
Issuance of shares in connection with Debt Exchange Agreements	647					647
Net income (loss)	(4,118)									(4,118)
Stockholders' equity ending balance (in shares) at Jun. 30, 2025				15,499,135
Stockholders equity, ending balance at Jun. 30, 2025	(61,216)			$ 1		338,202		0	0	(399,419)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense (benefit)	(312)					(312)
Issuance of shares in connection with equity interest payment agreement (in shares)				131,937
Issuance of shares in connection with Equity Interest Payment Agreement	162					162
Restricted shares award issuance (in shares)				48,345
Reclassification of foreign currency translation adjustment realized upon liquidation of foreign subsidiary	0
Foreign currency translation adjustment	0
Net income (loss)	$ 11,958									11,958
Stockholders' equity ending balance (in shares) at Sep. 30, 2025	15,679,417			15,679,417
Stockholders equity, ending balance at Sep. 30, 2025	$ (49,408)			$ 1		$ 338,052		$ 0	$ 0	$ (387,461)

SUPPLEMENTAL BALANCE SHEET AND CASH FLOW INFORMATION (Tables)

9 Months Ended

Sep. 30, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Contract Liability Rollforward

Changes in the Contract liability balance for the nine months ended September 30, 2025 were as follows:


$ in thousands	Contract Liabilities
Balance as of December 31, 2024	$	2,339
Revenue recognized	(2,339)
Deposits received	2,147
Balance as of September 30, 2025	$	2,147

Schedule of Prepaid and Accrued Expenses


$ in thousands	September 30, 2025		December 31, 2024
Prepaid expenses:
Electric deposits	$	588	$	588
Prepaid insurance	1,304		1,279


Other	719		750
Total	$	2,611	$	2,617

Accrued expenses:
Accrued interest	$	—	$	974
Other	4,108		3,258
Total	$	4,108	$	4,232

Schedule of Supplemental Cash Flow Information

Greenidge had the following noncash investing and financing activities:


	Nine Months Ended September 30,
$ in thousands	2025		2024
Cumulative-effect adjustment due to the adoption of ASU 2023-08	$	—	$	22
Property and equipment purchases in accounts payable	$	34	$	174
Common stock issued in exchange for reduction in debt	$	1,462	$	—
Shares issued to settle extension fees and accrued interest for stand-by letters of credit	$	1,651	$	—
Accrued interest added to principal of Senior Notes due 2030	$	93	$	—
Sale of equipment in exchange for receivable	$	—	$	1,200


Right-of-use asset obtained in exchange for operating lease liability	$	—	$	156

The following table provides supplemental cash flow information for cash paid for interest:


	Nine Months Ended September 30,
$ in thousands	2025		2024
Cash paid for interest	$	4,049	$	4,603

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
OPERATING ACTIVITIES FROM OPERATIONS:
Net income (loss)	$ 2,276	$ (15,879)
Adjustments to reconcile net income (loss) from operations to net cash flow from operating activities:
Depreciation	9,336	9,909
Change in fair value of warrant asset	0	420
Amortization of debt issuance costs (debt premium)	(738)	825
Impairment of long-lived assets	0	169
(Gain) loss on sale of assets	(1,384)	661
Gain on troubled debt restructuring	(11,496)	0
Stock-based compensation expense	609	1,798
Revenues from digital assets production	(12,639)	(15,041)
Proceeds from sale of digital assets	0	11,141
Gain on digital assets	(1,573)	(204)
Gain on insurance proceeds	(399)	0
Loss on liquidation of foreign subsidiary	348	0
Changes in operating assets and liabilities:
Accounts receivable	854	346
Emissions and carbon offset credits	2,376	220
Prepaids and other assets	6	1,668
Income tax receivable	(103)	(89)
Accounts payable	(1,309)	(299)
Accrued emissions	3,139	(4,374)
Accrued expenses	(33)	(1,874)
Contract liabilities	(192)	2,200
Related party payable	1,817	0
Other	(1,298)	55
Net cash flow used for operating activities	(10,403)	(8,348)
INVESTING ACTIVITIES FROM OPERATIONS:
Purchases of and deposits for property and equipment	(2,477)	(6,938)
Proceeds from sale of assets	5,015	1,878
Proceeds from insurance claim	399	0
Proceeds from sale of digital assets	15,044	628
Net cash flow provided by (used for) investing activities	17,981	(4,432)
FINANCING ACTIVITIES FROM OPERATIONS:
Proceeds from issuance of common stock, net of issuance costs	0	1,038
Proceeds from issuance of common stock and pre-funded warrants	0	6,000
Principal payments on debt	(8,616)	0
Net cash flow (used for) provided by financing activities	(8,616)	7,038
CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(1,038)	(5,742)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH - beginning of year	8,619	13,312
CASH AND CASH EQUIVALENTS - end of period	$ 7,581	$ 7,570

CONCENTRATIONS	9 Months Ended
CONCENTRATIONS	Sep. 30, 2025
Risks and Uncertainties [Abstract]
CONCENTRATIONS	CONCENTRATIONS The Company has a single hosting customer that accounted for 41% and 53% of the Company’s revenue during the three months ended September 30, 2025 and 2024, respectively, as well as 38% and 50% of the Company’s revenue during the nine months ended September 30, 2025 and 2024, respectively. The single hosting customer has the option to terminate the hosting agreement with 6 months' notice. For the Company’s self-mining operations, Greenidge considers its mining pool operators to be its customers. Greenidge has historically used a limited number of pool operators that have operated under contracts with a one-day term, which allows Greenidge the option to change pool operators at any time. Revenue from the Company’s pool operator customer accounted for approximately 25% and 26% of total revenue for the three months ended September 30, 2025 and 2024, respectively, and 27% and 34% of the Company’s revenue during the nine months ended September 30, 2025 and 2024, respectively. The Company has one major power customer, NYISO, that accounted for 31% and 21% of its revenue for the three months ended September 30, 2025 and 2024, respectively, and 35% and 16% of the Company’s revenue during the nine months ended September 30, 2025 and 2024, respectively. The Company has one natural gas vendor that accounted for approximately 39% and 33% of cost of revenue for the three months ended September 30, 2025 and 2024, respectively, and 45% and 36% of the Company’s revenue during the nine months ended September 30, 2025 and 2024, respectively.

- Definition

The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (d)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-21

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (d)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-21

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-21

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-21

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-21

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 3A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482836/275-10-55-3A

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-2A

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-1

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/275/tableOfContent

+ Details

DIGITAL ASSETS - Schedule of Digital Assets Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Crypto Asset [Roll Forward]
Beginning balance at fair value	$ 7,299		$ 6,950
Additions	4,178		12,639
Dispositions	(5,822)		(15,044)
Gain on digital assets	463	$ 156	1,573	$ 204
Ending balance	$ 6,118		$ 6,118

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	9 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Sep. 30, 2025
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Presentation of Condensed Consolidated Financial Statements In the opinion of Greenidge management, the accompanying condensed consolidated financial statements include all adjustments necessary for a fair presentation of the results for the interim periods presented and such adjustments are of a normal recurring nature. The results for the unaudited interim condensed consolidated statements of operations are not necessarily indicative of results to be expected for the year ending December 31, 2025 or for any future interim period. The unaudited interim condensed consolidated financial statements do not include all of the information and notes required by United States Generally Accepted Accounting Principles for complete financial statements. The accompanying condensed consolidated financial statements should be read in conjunction with the notes to the consolidated financial statements of the Company in its 2024 Annual Report on Form 10-K. Going Concern In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2014-15, Presentation of Financial Statements – Going Concern, the Company’s management evaluated whether there are conditions or events that pose risk associated with the Company's ability to continue as a going concern within one year after the date these financial statements have been issued. The Company’s consolidated financial statements have been prepared assuming that it will continue as a going concern. The Company has historically incurred operating losses and negative cash flows from operations and as of September 30, 2025 has a working capital deficit of $2.7 million. These losses were primarily the result of challenging bitcoin mining economics beginning in 2022, driven by increased energy prices and a significant decline in bitcoin prices. While the recovery in bitcoin prices and a reduction in energy costs have since improved mining economics, these gains have been partially offset by increased mining difficulty and by the April 19, 2024 halving, which reduced miner rewards. The Company’s projected operating cash flows are not sufficient to meet the existing debt obligations, specifically the remaining $38.4 million aggregate principal amount of the Company's 8.50% Senior Notes due in October 2026 (the “Senior Notes”), which mature on October 31, 2026. The potential inability to meet this debt service obligation raises substantial doubt as to the Company’s ability to continue as a going concern. As a result, the Company continues to explore a number of potential strategic alternatives with respect to the Company’s corporate or capital structure. Management has taken certain actions since 2022 to improve the Company’s liquidity, including, among other things, the sale of assets, the proceeds of which were used to extinguish $80.3 million of debt, and significant restructuring activities to materially reduce selling, general and administrative expenses. In addition to these actions taken in prior years, the Company completed the following transactions in 2025 to continue to improve its liquidity position: •On August 1, 2025, the Company entered into an Asset Purchase Agreement (the “APA”) and certain ancillary agreements to sell the Mississippi Facility, other than the adjoining 5.6 acre tract of land with over 73,000 square feet of industrial warehouse space, for $4.2 million in cash, which closed on September 16, 2025 (see Note 4, "Property and Equipment"). •During the nine months ended September 30, 2025, the Company entered into privately negotiated exchange agreements, pursuant to which it issued an aggregate of 1,242,456 shares of the Company’s Class A common stock and paid an aggregate of $2.7 million in cash in exchange for $10.5 million in aggregate principal amount of the Senior Notes. •During the three months ended September 30, 2025, the Company completed two separate tender/exchange offers (the “Tender/Exchange Offers”), each of which consisted of separate concurrent offers to purchase for cash, or issue a new series of 10.00% Senior Notes due 2030 (the “New Notes”) in exchange for, its outstanding 8.50% Senior Notes. Pursuant to the Tender/Exchange Offers, the Company purchased $14.7 million in aggregate principal amount of the Senior Notes for a total of $5.5 million in cash and exchanged $4.9 million in aggregate principal amount of the Senior Notes for $2.2 million in aggregate principal amount of the New Notes. Following the conclusion of the privately negotiated exchanges and Tender/Exchange Offers, the Company had $38.4 million and $4.1 million in aggregate principal amount and capitalized contractual interest payments, respectively, in connection with the Senior Notes outstanding. The Senior Notes mature on October 31, 2026 and payment of all outstanding principal shall be due on October 31, 2026. See Note 5, “Debt” for additional information. The Company is considering various items to address the Senior Notes obligations, including: •The retirement or purchase of its outstanding debt through cash purchases and/or exchanges for equity or other debt, which may be conducted in open-market purchases, privately negotiated transactions or other transactions. Such repurchases or exchanges, if any will be upon such terms and at such prices as the Company may determine, and will depend on prevailing market conditions, liquidity requirements, contractual restrictions and other factors. The amounts involved may be material and to the extent equity is used, dilutive. •Issuances of new debt to refinance or fully settle the existing Senior Notes. •The sale of assets, including the remaining 152 acres in Spartanburg, South Carolina (the “South Carolina Land”, which remains held for sale, and the Company anticipates completing a sale of the land within the next 12 months. The Company’s cash flow projections indicate that it will have sufficient liquidity to meet its cash requirements through the third quarter of 2026 but will not be sufficient to meet the debt payments due in October 2026. The Company’s operating cash flows are highly dependent on bitcoin mining economics commonly measured by hashprice. Increases in the price of bitcoin benefit the Company by increasing the amount of revenue earned for each bitcoin earned. Increases in the difficulty to mine a bitcoin adversely affect the Company by decreasing the number of bitcoin earned. Increases in the costs of electricity, natural gas, and emissions credits adversely affect the Company by increasing operating costs. Depending on the Company’s assumptions regarding the bitcoin hashprice and energy price inputs, the estimates of the amounts of required liquidity vary significantly. There can be no assurances that these assumptions used to estimate liquidity requirements and future cash burn rates will be correct, and the ability to be predictive is uncertain due to the limited ability to predict future bitcoin and energy prices. Additionally, the inability to procure and comply with the permits and licenses required to operate the Company’s facilities, including the Title V Air Permit for the New York Facility, which is subject to a Stipulation of Settlement but may still face legal challenges by third party environmental groups (see Note 10, “Commitments and Contingencies”), may have an adverse impact on its ability to meet cash flow forecasts. Given the uncertainty regarding the Company’s financial condition over the next 12 months from the date these financial statements were issued, the Company has concluded that there is substantial doubt about its ability to continue as a going concern for a reasonable period of time. The consolidated financial statements do not include any adjustments that might result from the outcome of this uncertainty. Reclassifications Certain prior year amounts have been reclassified to conform to the current year’s presentation. Significant Accounting Policies The Company’s significant accounting policies are described in Note 2. Summary of Significant Accounting Policies, in the Company’s consolidated financial statements included in the Company’s Annual Report filed on Form 10-K for the year ended December 31, 2024. There have been no material changes to the significant accounting policies, except as described herein, for the nine months ended September 30, 2025. Leases The Company accounts for leases in accordance with ASC 842. The Company determines if an arrangement is or contains a lease at contract inception. The Company recognizes a right-of-use (“ROU”) asset and a lease liability at the lease commencement date. The lease liability is initially measured at the present value of the unpaid lease payments at the lease commencement date and is subsequently measured at amortized cost using the effective interest method. As the rate implicit in the lease is not readily available, the Company uses its incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. The Company leases property for its corporate office and land used in cryptocurrency mining operations. Leases are categorized into two asset classes: corporate real estate and land - cryptocurrency mining. For the corporate real estate asset class, the Company has elected to combine lease and non-lease components. The Company excluded short-term leases having initial terms of 12 months or less as an accounting policy election and recognizes rent expense on a straight-line basis over the lease term. Lease payments included in the measurement of the lease liability comprise fixed payments. Variable lease payment amounts, such as increases in lease payments based on changes in usage, are not included in the measurement of the ROU asset or lease liability and are expensed as incurred. See Note 10, “Commitments and Contingencies” for additional information. Recent Accounting Pronouncements, Not Yet Adopted In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosure. ASU 2023-09 mostly requires, on an annual basis, disclosure of specific categories in an entity’s effective tax rate reconciliation and income taxes paid disaggregated by jurisdiction. The incremental disclosures may be presented on a prospective or retrospective basis. The ASU is effective for fiscal years beginning after December 15, 2024 with early adoption permitted. The Company is currently evaluating the impact the adoption of this ASU will have on its consolidated financial statements and disclosures. In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. ASU 2024-03 requires additional disclosures of certain costs and expenses specified in the updated guidance to provide enhanced transparency into aggregate amounts presented on the Consolidated Statements of Operations and Comprehensive Loss. In January 2025, the FASB issued ASU 2025-01, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40), which clarifies the effective date of ASU 2024-03. This guidance becomes effective for annual periods beginning after December 15, 2026, and interim periods within annual periods beginning after December 15, 2027. Early adoption is permitted. The Company is currently evaluating this guidance to determine the impact on its disclosures. In November 2024, the FASB issued ASU 2024-04, Debt—Debt with Conversion and Other Options (Subtopic 470-20): Induced Conversions of Convertible Debt Instruments. ASU 2024-04 clarifies the requirements for determining whether certain settlements of convertible debt instruments should be accounted as an induced conversion. This guidance becomes effective for annual reporting periods beginning after December 15, 2025, and interim periods within those annual reporting periods. Early adoption is permitted. The Company expects this guidance will have no impact to its consolidated financial statements. In September 2025, the FASB issued ASU 2025-06, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software. The amendments in this update remove references to software development stages and require entities to start capitalizing software costs when management has authorized and committed to funding the software project and it is probable that the project will be completed and the software will be used to perform the function intended. The update permits entities to apply the guidance on a prospective transition approach, modified transition approach or retrospective transition approach. The update is effective for all entities for annual periods beginning December 15, 2027, and for interim periods within those annual periods. Early adoption is permitted as of the beginning of an annual reporting period. The Company expects this guidance will have no impact to its consolidated financial statements. In September 2025, the FASB issued ASU 2025-07, Derivatives and Hedging (Topic 815) and Revenue from Contracts with Customers (Topic 606): Derivatives Scope Refinements and Scope Clarification for Share-Based Noncash Consideration from a Customer in a Revenue Contract. The amendments in this guidance narrow the scope to exclude certain contracts from derivative accounting in Topic 815 and clarify the accounting for share-based noncash consideration from a customer in Topic 606. The amendments in this update are effective for all entities for annual periods beginning after December 15, 2026, and interim periods within those annual periods. Early adoption is permitted. The Company expects this guidance will have no impact to its consolidated financial statements. Recent Accounting Pronouncements, Adopted In March 2025, the FASB issued ASU No. 2025-02, Liabilities (Subtopic 405): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 122, which amends the Accounting Standards Codification to remove the text of SEC Staff Bulletin (“SAB”) 121: Accounting for Obligations to Safeguard Crypto-Assets an Entity Holds for its Platform Users as it has been rescinded by the issuance of SAB 122. ASU 2025-02 is effective immediately and has not had an impact on the Company’s financial statements. In May 2025, the FASB issued ASU No. 2025-03, Business Combinations (Topic 805) and Consolidation (Topic 810): Determining the Accounting Acquirer in the Acquisition of a Variable Interest Entity, which provides updated guidance on identifying the accounting acquirer in an acquisition transaction effected primarily by exchanging equity interests when the legal acquiree is a variable interest entity that meets the definition of a business. The updates in this ASU are effective for all entities for annual reporting periods beginning after December 15, 2026, and interim periods within those annual periods. The updates require entities to apply the new guidance prospectively to any acquisition transaction that occurs after the initial application date. Early adoption is permitted as of the beginning of an interim or annual reporting period. The adoption of ASU 2025-03 did not have an effect on the Company’s financial statements. In May 2025, the FASB issued ASU No. 2025-04, Compensation—Stock Compensation (Topic 718) and Revenue from Contracts with Customers (Topic 606): Clarifications to Share-Based Consideration Payable to a Customer. The updates in this ASU include revising the definition of the term “performance condition” for share-based compensation payable to customers, elimination of the policy election permitting a grantor to account for forfeitures as they occur, clarification that share-based consideration encompasses the same instruments as share-based payment arrangements but the grantee does not need to be the supplier of goods or services to the grantor, and clarification that a grantor is required to assess the probability that an award will vest using only the guidance in Topic 718. The updates in this ASU are effective for all entities for annual reporting periods beginning after December 15, 2026, and interim periods with those annual periods. Early adoption is permitted. Either modified retrospective or a retrospective basis is permitted when applying the updated guidance upon adoption. The adoption of ASU 2025-04 did not have an effect on the Company’s financial statements. In July 2025, the FASB issued ASU 2025-05, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets. The amendments in this ASU provide all entities with a practical expedient allowing entities to assume that current conditions as of the balance sheet date do not change for the remaining life of the asset when estimating expected credit losses. Entities, other than a public business entity, that elect the practical expedient are permitted to make an accounting policy election to consider collection activity after the balance sheet date when estimating expected credit losses. This guidance becomes effective for annual periods beginning after December 15, 2025, and interim periods within those annual reporting periods. Early adoption is permitted in both interim and annual reporting periods in which financial statements have not yet been issued or made available for issuances. Application of the amendments are to be made prospectively. The Company elected to early adopt the guidance in this update effective July 1, 2025. The adoption of ASU 2025-05 did not have an effect on the Company's financial statements.

SEGMENT REPORTING (Tables)

9 Months Ended

Sep. 30, 2025

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment


	Three Months Ended September 30,				Nine Months Ended September 30,
$ in thousands	2025		2024		2025		2024
Segment revenue	$	15,220	$	12,351	$	47,323	$	44,741
Less:
Natural gas expense	4,561		3,248		17,812		11,696
Electricity for mining expense	1,057		1,034		3,550		1,761
Emissions expense	2,252		2,666		7,106		6,154
Hosting fee expense	137		380		432		3,267
Other cost of revenue (a)	3,016		2,029		8,972		8,267
Segment gross profit	$	4,197	$	2,994	$	9,451	$	13,596

Selling, general and administrative	3,069		3,720		8,951		13,199
Depreciation	3,026		3,390		9,336		9,909

Impairment of long-lived assets	—		—		—		169
Gain on digital assets	(463)		(156)		(1,573)		(204)
(Gain) loss on sale of assets	(1,739)		693		(1,384)		661
Gain on insurance proceeds	—		—		(399)		—

Interest expense, net	244		1,832		3,857		5,439
Change in fair value of warrant asset	—		—		—		420
Loss on liquidation of subsidiary	—		—		348		—
Gain on troubled debt restructuring	(11,496)		—		(11,496)		—
Other income, net	(402)		—		(421)		—
Benefit from income taxes	—		(118)		(44)		(118)
Segment net income (loss)	$	11,958	$	(6,367)	$	2,276	$	(15,879)

(a) Other cost of revenue primarily consists of labor and repairs and maintenance expenses

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (UNAUDITED) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
REVENUE:
Total revenue	$ 15,220,000	$ 12,351,000	$ 47,323,000	$ 44,741,000
OPERATING COSTS AND EXPENSES:
Selling, general and administrative	3,069,000	3,720,000	8,951,000	13,199,000
Depreciation	3,026,000	3,390,000	9,336,000	9,909,000
Impairment of long-lived assets	0	0	0	169,000
Gain on digital assets	(463,000)	(156,000)	(1,573,000)	(204,000)
(Gain) loss on sale of assets	(1,739,000)	693,000	(1,384,000)	661,000
Gain on insurance proceeds	0	0	(399,000)	0
Total operating costs and expenses	14,916,000	17,004,000	52,803,000	54,879,000
Operating income (loss)	304,000	(4,653,000)	(5,480,000)	(10,138,000)
OTHER INCOME (EXPENSE), NET:
Interest expense, net	(244,000)	(1,832,000)	(3,857,000)	(5,439,000)
Change in fair value of warrant asset	0	0	0	(420,000)
Gain on troubled debt restructuring	11,496,000	0	11,496,000	0
Loss on liquidation of subsidiary	0	0	(348,000)	0
Other income, net	402,000	0	421,000	0
Total other income (expense), net	11,654,000	(1,832,000)	7,712,000	(5,859,000)
Income (loss) from operations before income taxes	11,958,000	(6,485,000)	2,232,000	(15,997,000)
Benefit from income taxes	0	(118,000)	(44,000)	(118,000)
Net income (loss)	11,958,000	(6,367,000)	2,276,000	(15,879,000)
Comprehensive Loss
Net income (loss)	11,958,000	(6,367,000)	2,276,000	(15,879,000)
Foreign currency translation adjustment	0	0	0	(3,000)
Reclassification of foreign currency translation adjustment realized upon liquidation of foreign subsidiary	0	0	348,000	0
Comprehensive income (loss)	$ 11,958,000	$ (6,367,000)	$ 2,624,000	$ (15,882,000)
Net income (loss) per share:
Basic (in dollars per share)	$ 0.76	$ (0.60)	$ 0.15	$ (1.58)
Diluted (in dollars per share)	$ 0.75	$ (0.60)	$ 0.15	$ (1.58)
Weighted Average Shares Outstanding
Basic (in shares)	15,659	10,652	14,954	10,040
Diluted (in shares)	15,891	10,652	15,079	10,040
Datacenter hosting
REVENUE:
Total revenue	$ 6,304,000	$ 6,490,000	$ 18,169,000	$ 22,582,000
OPERATING COSTS AND EXPENSES:
Cost of revenue	5,587,000	4,975,000	18,355,000	16,963,000
Cryptocurrency mining
REVENUE:
Total revenue	4,178,000	3,267,000	12,639,000	15,041,000
OPERATING COSTS AND EXPENSES:
Cost of revenue	2,532,000	2,605,000	8,577,000	9,525,000
Power and capacity
REVENUE:
Total revenue	4,738,000	2,594,000	16,515,000	7,118,000
OPERATING COSTS AND EXPENSES:
Cost of revenue	$ 2,904,000	$ 1,777,000	$ 10,940,000	$ 4,657,000

SEGMENT REPORTING

9 Months Ended

Sep. 30, 2025

Segment Reporting [Abstract]

SEGMENT REPORTING

The Company has one reportable segment. The Datacenter Operations segment primarily derives revenue through datacenter hosting, crypto-currency self-mining, and power and capacity sales. The Company’s chief operating decision maker is collectively the Chief Executive Officer and the President. They assess the performance of the segment and decide how to allocate resources based on segment gross profit and net income. The metrics are used to evaluate the investment in the expansion of new datacenters or other uses such as the continued deleveraging of the Company. Gross profit and net income are used to monitor budget versus actual results.


	Three Months Ended September 30,				Nine Months Ended September 30,
$ in thousands	2025		2024		2025		2024
Segment revenue	$	15,220	$	12,351	$	47,323	$	44,741
Less:
Natural gas expense	4,561		3,248		17,812		11,696
Electricity for mining expense	1,057		1,034		3,550		1,761
Emissions expense	2,252		2,666		7,106		6,154
Hosting fee expense	137		380		432		3,267
Other cost of revenue (a)	3,016		2,029		8,972		8,267
Segment gross profit	$	4,197	$	2,994	$	9,451	$	13,596

Selling, general and administrative	3,069		3,720		8,951		13,199
Depreciation	3,026		3,390		9,336		9,909

Impairment of long-lived assets	—		—		—		169
Gain on digital assets	(463)		(156)		(1,573)		(204)
(Gain) loss on sale of assets	(1,739)		693		(1,384)		661
Gain on insurance proceeds	—		—		(399)		—

Interest expense, net	244		1,832		3,857		5,439
Change in fair value of warrant asset	—		—		—		420
Loss on liquidation of subsidiary	—		—		348		—
Gain on troubled debt restructuring	(11,496)		—		(11,496)		—
Other income, net	(402)		—		(421)		—
Benefit from income taxes	—		(118)		(44)		(118)
Segment net income (loss)	$	11,958	$	(6,367)	$	2,276	$	(15,879)

(a) Other cost of revenue primarily consists of labor and repairs and maintenance expenses

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

Cover - shares	9 Months Ended
Cover - shares	Sep. 30, 2025	Nov. 10, 2025
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2025
Document Transition Report	false
Entity File Number	001-40808
Entity Registrant Name	Greenidge Generation Holdings Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	86-1746728
Entity Address, Address Line One	1159 Pittsford-Victor Road
Entity Address, Address Line Two	Suite 240
Entity Address, City or Town	Pittsford
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	14534
City Area Code	315
Local Phone Number	536-2359
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0001844971
Amendment Flag	false
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q3
Common Class A
Document Information [Line Items]
Title of 12(b) Security	Class A Common Stock, $0.0001 par value
Trading Symbol	GREE
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		13,065,603
Senior Notes
Document Information [Line Items]
Title of 12(b) Security	8.50% Senior Notes due 2026
Trading Symbol	GREEL
Security Exchange Name	NASDAQ
Common Class B
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,733,394

DEBT

9 Months Ended

Sep. 30, 2025

Debt Disclosure [Abstract]

DEBT

The following table provides information on the Company’s debt agreements as of September 30, 2025 and December 31, 2024:


$ in thousands							Balance as of:
Note	Loan Date	Maturity Date	Interest Rate		Amount Financed		September 30, 2025		December 31, 2024
Senior Unsecured Notes	October 2021/December 2021	October 2026	8.5	%	$	72,200	$	42,491	$	68,541
Senior Unsecured Notes	July 2025/September 2025	June 2030	10.0	%	2,245		3,358		—
Total Debt							45,849		68,541
Less: Debt discount and issue costs							—		(473)
Total debt at book value							45,849		68,068
Less: Current portion							(3,535)		—
Long-term debt, net of current portion and deferred financing fees							$	42,314	$	68,068

The Company incurred interest expense of $0.2 million and $1.8 million during the three months ended September 30, 2025 and 2024, respectively, detailed in the table below. The Company incurred interest expense of $3.9 million and $5.4 million during the nine months ended September 30, 2025 and 2024, respectively, detailed in the table below.

The following table details our interest expense related to the Senior Notes and the Equity Interest Payment Agreement (defined below) (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2025		2024		2025		2024
Contractual interest expense on Senior Notes	$	42	$	1,534	$	2,772	$	4,603
Amortization of debt (premium) discount and issuance costs	—		295		(738)		824
Total interest expense on Senior Notes	$	42	$	1,829	$	2,034	$	5,427
Interest expense on Equity Interest Payment Agreement	196		—		1,817		—
Other interest expense	6		3		6		12
Total interest expense	$	244	$	1,832	$	3,857	$	5,439

Senior Unsecured Notes

During the fourth quarter of 2021, the Company sold $72.2 million of the Senior Notes pursuant to the Company’s registration statement on Form S-1. Interest on the Senior Notes is payable quarterly in arrears on January 31, April 30, July 31 and October 31 of each year to the holders of record at the close of business on the immediately preceding January 15, April 15, July 15 and October 15, respectively. The Senior Notes are senior unsecured obligations of the Company and rank equal in right of payment with the Company’s existing and future senior unsecured indebtedness. The Senior Notes trade on the Nasdaq Global Select Market under the symbol “GREEL.”

The Company may redeem the Senior Notes for cash in whole or in part at any time (i) on or after October 31, 2023 and prior to October 31, 2024, at a price equal to 102% of their principal amount, plus accrued and unpaid interest to, but excluding, the date of redemption, (ii) on or after October 31, 2024 and prior to October 31, 2025, at a price equal to 101% of their principal amount, plus accrued and unpaid interest to, but excluding, the date of redemption, and (iii) on or after October 31, 2025 and prior to maturity, at a price equal to 100% of their principal amount, plus accrued and unpaid interest to, but excluding, the date of redemption. In addition, the Company may redeem the Senior Notes, in whole, but

not in part, at any time at its option, at a redemption price equal to 100.5% of the principal amount plus accrued and unpaid interest to, but not including, the date of redemption, upon the occurrence of certain change of control events.

During the three months ended September 30, 2025, the Company completed the Tender/Exchange Offers. Pursuant to the Tender/Exchange Offer, the Company purchased $14.7 million in aggregate principal amount of the Senior Notes for a total of $5.5 million in cash and exchanged $4.9 million in aggregate principal amount of the Senior Notes for $2.2 million in aggregate principal amount of the New Notes.

The Company concluded the privately negotiated exchanges and Tender/Exchange Offers met the definition of a troubled debt restructuring under ASC 470-60, Troubled Debt Restructurings by Debtors, as the Company was experiencing financial difficulties and the creditors granted a concession. The adjusted carrying value of the Senior Notes and New Notes (collectively the “Notes”) exceeded the undiscounted cash flows of the Notes, and therefore, the Company wrote down the carrying value of the Notes to the undiscounted future cash flows of the Notes and recognized a gain on troubled debt restructuring of $11.5 million during the three and nine months ended September 30, 2025. Following the conclusion of the privately negotiated exchanges and Tender/Exchange Offers, the Company had $38.4 million and $4.1 million in aggregate principal amount and capitalized contractual interest payments, respectively, in connection with the Senior Notes outstanding and $2.2 million and $1.1 million in aggregate principal amount and capitalized contractual interest payments, respectively, in connection with the New Notes outstanding.

Senior Unsecured New Notes

Interest on the New Notes is payable quarterly in arrears on March 31, June 30, September 30 and December 31 of each year to the holders of record at the close of business on the immediately preceding March 15, June 15, September 15 and December 15, respectively. The New Notes are senior unsecured obligations of the Company and rank equal in right of payment with the Company’s existing and future senior unsecured indebtedness.

The Company may redeem the New Notes for cash in whole or in part at any time (i) on or after July 31, 2026 and prior to July 31, 2027, at a price equal to 102% of their principal amount, plus accrued and unpaid interest to, but excluding, the date of redemption, (ii) on or after July 31, 2027 and prior to July 31, 2028, at a price equal to 101% of their principal amount, plus accrued and unpaid interest to, but excluding, the date of redemption, and (iii) on or after July 31, 2028 and prior to maturity, at a price equal to 100% of their principal amount, plus accrued and unpaid interest to, but excluding, the date of redemption. In addition, the Company may redeem the New Notes, in whole, but not in part, at any time at its option, at a redemption price equal to 100.5% of the principal amount plus accrued and unpaid interest to, but not including, the date of redemption, upon the occurrence of certain change of control events.

Minimum Future Principal Payments

Minimum future principal payments on debt at September 30, 2025 were as follows:


$ in thousands
Remainder of 2025	$	—
2026	38,410
2027	—
2028	—
Thereafter	2,245
Total	$	40,655

Fair Value Disclosure

The notional value and estimated fair value of the Company’s Senior Notes totaled $38.4 million and $15.3 million, respectively, at September 30, 2025 and $68.5 million and $24.8 million, respectively, at December 31, 2024. The notional value of the Senior Notes does not include contractual interest payments of $4.1 million and unamortized discounts and debt issuance costs of $0.5 million at September 30, 2025 and December 31, 2024, respectively. The estimated fair value of the Senior Notes was measured using quoted market prices at the reporting date. Such instruments were valued using Level 1 inputs. The Company believes the notional value of the New Notes of $2.2 million at September 30, 2025, which does not include contractual interest payments of $1.1 million, approximates its fair value.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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+ Details

PROPERTY AND EQUIPMENT (Tables)

9 Months Ended

Sep. 30, 2025

Property, Plant and Equipment [Abstract]

Schedule of Property and Equipment, Net

Property and equipment, net, consisted of the following at September 30, 2025 and December 31, 2024:


$ in thousands	Estimated Useful Lives	September 30, 2025		December 31, 2024
Plant infrastructure	10 years	$	1,522	$	1,522
Miners	3 years	32,125		36,182
Miner facility infrastructure	10 years	10,810		13,227
Land	N/A	2,020		1,952
Equipment	5 years	45		45


Construction in process	N/A	345		1,834

		46,867		54,762
Less: Accumulated depreciation		(27,132)		(24,463)
		$	19,735	$	30,299

EQUITY BASED COMPENSATION

9 Months Ended

Sep. 30, 2025

Share-Based Payment Arrangement [Abstract]

EQUITY BASED COMPENSATION

In February 2021, Greenidge adopted an equity incentive plan and reserved 383,111 shares of Class A common stock for issuance under the plan (the “2021 Equity Plan”), applicable to employees and non-employee directors. In April 2023, the stockholders approved an amendment and restatement of the Company’s 2021 Equity Plan to increase the maximum aggregate number of shares of Class A common stock that may be issued for all purposes under the Plan by 500,000 shares of Class A common stock from 383,111 to 883,111 shares of Class A common stock and to remove the counting of shares of Class A common stock granted in connection with awards other than stock options and stock appreciation rights against the total number of shares available under the Plan as two shares of Class A common stock for every one share of Class A common stock granted in connection with such award. In November 2024, the stockholders approved an amendment and restatement of the 2021 Equity Plan to increase the maximum aggregate number of shares of Class A common stock that may be issued for all purposes under the 2021 Equity Plan by 700,000 shares of Class A common stock

from 883,111 to 1,583,111 shares of Class A common stock. In June 2025, the stockholders approved an amendment and restatement of the 2021 Equity Plan to increase the maximum aggregate number of shares of Class A common stock that may be issued for all purposes under the 2021 Equity Plan by 1,000,000 share of Class A common stock from 1,583,111 to 2,583,111 shares of Class A common stock. In October 2022, the Company registered 307,684 shares of Class A common stock, outside of the 2021 Equity Plan, that were reserved for issuance upon the vesting and exercise of non-qualified stock option inducement grants.

RSAs and RSUs

Restricted stock awards (“RSAs”) and restricted stock units (“RSUs”) are generally granted with an eligible vesting range from upon grant to over a two-year period.

The Company’s unvested RSA and RSU award activity for the nine months ended September 30, 2025 is summarized below:


	RSAs & RSUs	Weighted Average Grant Date Fair Value
Unvested at December 31, 2024	131,347	$	3.31
Granted	825,106	$	0.88
Vested	(435,701)	$	1.47
Forfeited	(37,573)	$	1.55
Unvested at September 30, 2025	483,179	$	0.96

The value of RSA and RSU grants is measured based on their fair market value on the date of grant and amortized over their requisite service periods. At September 30, 2025, there was approximately $0.4 million of total unrecognized compensation cost related to unvested restricted stock rights, which is expected to be recognized over a remaining weighted-average vesting period of approximately 2.28 years.

Common Stock Options

The Company’s common stock options activity for the nine months ended September 30, 2025 is summarized below:


	Options	Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Life (in years)	Aggregate Intrinsic Value
Outstanding at December 31, 2024	482,492	$	15.75


Forfeited	(61,760)	$	13.20
Expired	(128,059)	$	14.95
Outstanding at September 30, 2025	292,673	$	16.63	7.28	$	—
Exercisable as of September 30, 2025	213,507	$	21.07	6.93	$	—

The value of common stock option grants is measured based on their fair market value on the date of grant and amortized over their requisite service periods. At September 30, 2025, there was approximately $0.2 million of total unrecognized compensation cost related to unvested common stock options, which is expected to be recognized over a remaining weighted-average vesting period of approximately 1.06 years.

Stock-Based Compensation

The Company recognized stock-based compensation benefit of $0.3 million, which was due to forfeited options during the period, and stock-based compensation expense of $0.4 million during the three months ended September 30, 2025 and 2024, respectively, and $0.6 million and $1.8 million during the nine months ended September 30, 2025 and 2024,

respectively. Stock-based compensation expense is included in selling, general and administrative expenses in the accompanying unaudited condensed consolidated statements of operations and comprehensive loss.