Condensed Consolidated Statements Of Stockholders' Equity - USD ($) $ in Thousands	Total	Support Com	Common Class B [Member]	Preferred Stock [Member]	Common Stock [Member]	Common Stock [Member] Support Com	Common Stock [Member] Common Class B [Member]	Additional Paid - In Capital [Member]	Additional Paid - In Capital [Member] Support Com	Additional Paid - In Capital [Member] Common Class B [Member]	Common Units [Member]	Common Units [Member] Common Class B [Member]	Preferred Units [Member]	Preferred Units [Member] Common Class B [Member]	Senior Priority Units [Member]	Senior Priority Units [Member] Common Class B [Member]	Total Members' Capital [Member]	Total Members' Capital [Member] Common Class B [Member]	Accumulated Deficit [Member]
Beginning Balance at Dec. 31, 2019	$ 33,724			$ 0	$ 0			$ 0											$ (20,350)
Beginning Balance (in shares) at Dec. 31, 2019				0	0
Members' Capital, Beginning Balance at Dec. 31, 2019											$ 0		$ 54,074		$ 0		$ 54,074
Members' Capital, Common Units, Beginning Balance (in units) at Dec. 31, 2019											750
Members' Capital, Preferred Units, Beginning Balance (in units) at Dec. 31, 2019													54,228
Members' Capital, Senior Priority Units, Beginning Balance (in units) at Dec. 31, 2019															0
Net income (loss)	(2,177)																		(2,177)
Ending Balance at Jun. 30, 2020	31,547			$ 0	$ 0			0											(22,527)
Ending Balance (in shares) at Jun. 30, 2020				0	0
Members' Capital, Ending Balance at Jun. 30, 2020											$ 0		$ 54,074		$ 0		54,074
Members' Capital, Common Units, Ending Balance (in units) at Jun. 30, 2020											750
Members' Capital, Preferred Units, Ending Balance (in units) at Jun. 30, 2020													54,228
Members' Capital, Senior Priority Units, Ending Balance (in units) at Jun. 30, 2020															0
Beginning Balance at Dec. 31, 2019	33,724			$ 0	$ 0			0											(20,350)
Beginning Balance (in shares) at Dec. 31, 2019				0	0
Members' Capital, Beginning Balance at Dec. 31, 2019											$ 0		$ 54,074		$ 0		54,074
Members' Capital, Common Units, Beginning Balance (in units) at Dec. 31, 2019											750
Members' Capital, Preferred Units, Beginning Balance (in units) at Dec. 31, 2019													54,228
Members' Capital, Senior Priority Units, Beginning Balance (in units) at Dec. 31, 2019															0
Net income (loss)	(2,466)
Ending Balance at Sep. 30, 2020	31,258			$ 0	$ 0			0											(22,816)
Ending Balance (in shares) at Sep. 30, 2020				0	0
Members' Capital, Ending Balance at Sep. 30, 2020											$ 0		$ 54,074		$ 0		54,074
Members' Capital, Common Units, Ending Balance (in units) at Sep. 30, 2020											750
Members' Capital, Preferred Units, Ending Balance (in units) at Sep. 30, 2020													54,228
Members' Capital, Senior Priority Units, Ending Balance (in units) at Sep. 30, 2020															0
Beginning Balance at Jun. 30, 2020	31,547			$ 0	$ 0			0											(22,527)
Beginning Balance (in shares) at Jun. 30, 2020				0	0
Members' Capital, Beginning Balance at Jun. 30, 2020											$ 0		$ 54,074		$ 0		54,074
Members' Capital, Common Units, Beginning Balance (in units) at Jun. 30, 2020											750
Members' Capital, Preferred Units, Beginning Balance (in units) at Jun. 30, 2020													54,228
Members' Capital, Senior Priority Units, Beginning Balance (in units) at Jun. 30, 2020															0
Net income (loss)	(289)																		(289)
Ending Balance at Sep. 30, 2020	31,258			$ 0	$ 0			0											(22,816)
Ending Balance (in shares) at Sep. 30, 2020				0	0
Members' Capital, Ending Balance at Sep. 30, 2020											$ 0		$ 54,074		$ 0		54,074
Members' Capital, Common Units, Ending Balance (in units) at Sep. 30, 2020											750
Members' Capital, Preferred Units, Ending Balance (in units) at Sep. 30, 2020													54,228
Members' Capital, Senior Priority Units, Ending Balance (in units) at Sep. 30, 2020															0
Beginning Balance at Dec. 31, 2020	44,360			$ 0	$ 0			0											(24,916)
Beginning Balance (in shares) at Dec. 31, 2020				0	0
Members' Capital, Beginning Balance at Dec. 31, 2020	$ 69,276										$ 0		$ 39,074		$ 30,202		69,276
Members' Capital, Common Units, Beginning Balance (in units) at Dec. 31, 2020	750										750
Members' Capital, Preferred Units, Beginning Balance (in units) at Dec. 31, 2020													39,228
Members' Capital, Senior Priority Units, Beginning Balance (in units) at Dec. 31, 2020															10,000
Contribution of Preferred Units, Senior Priority Units, and notes payable to related party for Greenidge class B common stock (Note 9)			$ 3,615				$ 3			$ 72,888				$ (39,074)		$ (30,202)		$ (69,276)
Contribution of Preferred Units, Senior Priority Units, and notes payable to related party for Greenidge class B common stock (Note 9) (in shares/units)							26,800,300							(39,228)		(10,000)
Contribution of GGH Common Units for Greenidge class B common stock (Note 9) (in shares/units)							1,199,700					(750)
Proceeds from issuance of preferred stock, net of stock issuance costs	$ 37,113			$ 1				37,112
Proceeds from issuance of preferred stock, net of stock issuance costs (in shares)				1,620,000
Stock-based compensation expense	1,063							1,063
Proceeds from stock options exercised	1,000							1,000
Proceeds from stock options exercised (in shares)					160,000
Stock issued to purchase miners	991							991
Stock issued to purchase miners (in shares)					160,000
Net income (loss)	4,797																		4,797
Ending Balance at Jun. 30, 2021	92,939			$ 1	$ 3			113,054											(20,119)
Ending Balance (in shares) at Jun. 30, 2021				1,620,000	28,320,000
Members' Capital, Ending Balance at Jun. 30, 2021											$ 0		$ 0		$ 0		0
Members' Capital, Common Units, Ending Balance (in units) at Jun. 30, 2021											0
Members' Capital, Preferred Units, Ending Balance (in units) at Jun. 30, 2021													0
Members' Capital, Senior Priority Units, Ending Balance (in units) at Jun. 30, 2021															0
Beginning Balance at Dec. 31, 2020	44,360			$ 0	$ 0			0											(24,916)
Beginning Balance (in shares) at Dec. 31, 2020				0	0
Members' Capital, Beginning Balance at Dec. 31, 2020	$ 69,276										$ 0		$ 39,074		$ 30,202		69,276
Members' Capital, Common Units, Beginning Balance (in units) at Dec. 31, 2020	750										750
Members' Capital, Preferred Units, Beginning Balance (in units) at Dec. 31, 2020													39,228
Members' Capital, Senior Priority Units, Beginning Balance (in units) at Dec. 31, 2020															10,000
Issuance of shares for investor fee associated with successful completion of Merger (Note 9), Value	$ 17,826
Issuance of warrants to advisor in connection with completion of Merger (Note 9)	8,779
Stock issued to purchase miners	991
Net income (loss)	(3,099)
Ending Balance at Sep. 30, 2021	205,802			$ 0	$ 4			233,813											(28,015)
Ending Balance (in shares) at Sep. 30, 2021				0	38,667,705
Members' Capital, Ending Balance at Sep. 30, 2021											$ 0		$ 0		$ 0		0
Members' Capital, Common Units, Ending Balance (in units) at Sep. 30, 2021											0
Members' Capital, Preferred Units, Ending Balance (in units) at Sep. 30, 2021													0
Members' Capital, Senior Priority Units, Ending Balance (in units) at Sep. 30, 2021															0
Beginning Balance at Jun. 30, 2021	92,939			$ 1	$ 3			113,054											(20,119)
Beginning Balance (in shares) at Jun. 30, 2021				1,620,000	28,320,000
Members' Capital, Beginning Balance at Jun. 30, 2021											$ 0		$ 0		$ 0		0
Members' Capital, Common Units, Beginning Balance (in units) at Jun. 30, 2021											0
Members' Capital, Preferred Units, Beginning Balance (in units) at Jun. 30, 2021													0
Members' Capital, Senior Priority Units, Beginning Balance (in units) at Jun. 30, 2021															0
Proceeds from issuance of preferred stock, net of stock issuance costs		$ 91,588							$ 91,588
Proceeds from issuance of preferred stock, net of stock issuance costs (in shares)						2,960,731
Issuance of shares for investor fee associated with successful completion of Merger (Note 9), Share					562,174
Issuance of shares for investor fee associated with successful completion of Merger (Note 9), Value	17,826							17,826
Issuance of warrants to advisor in connection with completion of Merger (Note 9)	8,779							8,779
Conversion of Preferred Stock, Shares				(1,620,000)	6,480,000
Conversion of Preferred Stock				$ (1)	$ 1
Shares issued upon exercise of warrants, Share					344,800
Shares Issued Upon Exercise Of Warrants, Value	2,155							2,155
Stock-based compensation expense	411							411
Net income (loss)	(7,896)																		(7,896)
Ending Balance at Sep. 30, 2021	205,802			$ 0	$ 4			$ 233,813											$ (28,015)
Ending Balance (in shares) at Sep. 30, 2021				0	38,667,705
Members' Capital, Ending Balance at Sep. 30, 2021											$ 0		$ 0		$ 0		$ 0
Members' Capital, Common Units, Ending Balance (in units) at Sep. 30, 2021											0
Members' Capital, Preferred Units, Ending Balance (in units) at Sep. 30, 2021													0
Members' Capital, Senior Priority Units, Ending Balance (in units) at Sep. 30, 2021															0