STOCKHOLDERS' EQUITY (Details)							1 Months Ended					3 Months Ended		6 Months Ended	8 Months Ended	12 Months Ended
	Oct. 03, 2022 USD ($)	Apr. 28, 2022 shares	Apr. 07, 2022 USD ($)	Apr. 06, 2022 USD ($) shares	Sep. 15, 2021 USD ($)	Sep. 14, 2021 USD ($) $ / shares shares	Feb. 28, 2023 shares	Sep. 30, 2021 shares	Jan. 31, 2021 USD ($) $ / shares shares	Jul. 31, 2020 USD ($) tranche	Oct. 31, 2018 shares	Jan. 01, 2023 USD ($)	Dec. 31, 2022 USD ($) vote $ / shares shares	Mar. 30, 2023 USD ($) shares	Dec. 31, 2022 USD ($) vote $ / shares shares	Dec. 31, 2022 USD ($) vote $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Sep. 13, 2021 $ / shares shares
Class Of Stock [Line Items]
Common stock, authorized (in shares)													3,000,000,000		3,000,000,000	3,000,000,000	3,000,000,000
Greenidge common stock value per share (in dollars per share) | $ / shares													$ 0.0001		$ 0.0001	$ 0.0001	$ 0.0001
Preferred stock, authorized (in shares)													20,000,000		20,000,000	20,000,000	20,000,000
Preferred stock, par value (in dollars per share) | $ / shares													$ 0.0001		$ 0.0001	$ 0.0001	$ 0.0001
Preferred stock, outstanding (in shares)													0		0	0	0
Common stock, issued (in shares)													46,252,779		46,252,779	46,252,779	40,865,336
Common stock | $													$ 5,000		$ 5,000	$ 5,000	$ 4,000
Common stock, outstanding (in shares)													46,252,779		46,252,779	46,252,779	40,865,336
Number of votes | vote													1		1	1
Maximum class A common stock and class B common stock shares in excess of the exchange cap			19.99%
Greenidge Generation Holdings Inc
Class Of Stock [Line Items]
Number of tranches | tranche										2
Greenidge Generation Holdings Inc | Tranche One
Class Of Stock [Line Items]
Tranche value | $										$ 13,900,000
Greenidge Generation Holdings Inc | Tranche Two
Class Of Stock [Line Items]
Tranche value | $										$ 16,300,000
Equity Incentive Plan
Class Of Stock [Line Items]
Shares based payment arrangement, shares purchased for award (in shares)											1,250
Shares based payment arrangement, equity instrument other than option, granted in period (in shares)											750
Support Com
Class Of Stock [Line Items]
Payment of stock issuance costs | $																	$ 2,297,000
Private Placement
Class Of Stock [Line Items]
Proceeds from issuance of private placement | $									$ 37,100,000
Discount on consideration received			5.00%		5.00%
Discount on consideration received, triggering event achieved			6.00%		6.00%
Discount on consideration received, triggering event, amount | $			$ 200,000,000		$ 200,000,000
Maximum percentage of ownership by investor					4.99%
Sale of stock, period			24 months
At The Market Issuance Sales Agreement
Class Of Stock [Line Items]
Number of shares issued in transaction													2,881,536
Underwriter compensation, percentage of gross stock sales	5.00%
Maximum aggregate consideration to be received on transaction | $	$ 22,800,000
Net proceeds received | $													$ 2,100,000
At The Market Issuance Sales Agreement | Subsequent Event
Class Of Stock [Line Items]
Number of shares issued in transaction							1,333,333							15,000,800
Net proceeds received | $												$ 8,200,000		$ 10,200,000
Greenidge Common Stock
Class Of Stock [Line Items]
Stock split related to exchange for acquisition of ownership interests (in shares)									28,000,000
Preferred Stock
Class Of Stock [Line Items]
Preferred stock, authorized (in shares)																		20,000,000
Preferred stock, par value (in dollars per share) | $ / shares																		$ 0.0001
Class A Common Stock, $0.0001 par value
Class Of Stock [Line Items]
Common stock, authorized (in shares)																		2,400,000,000
Greenidge common stock value per share (in dollars per share) | $ / shares						$ 0.0001												$ 0.0001
Conversion ratio																4
Number of shares converted								5,760,000
Common stock, issued (in shares)													17,726,407		17,726,407	17,726,407
Additional common stock issued (in shares)															1,599,229
Additional common stock issued | $													$ 5,000,000		$ 5,000,000	$ 5,000,000
Stock owned						16.60%
Warrant to purchase (in shares)						344,800
Exercise price (in dollars per share) | $ / shares						$ 6.25
Fair value of warrants | $						$ 8,800,000
Number of votes | vote													1		1	1
Common stock, outstanding (in shares)													17,726,407		17,726,407	17,726,407
Class A Common Stock, $0.0001 par value | Support Com
Class Of Stock [Line Items]
Additional common stock issued (in shares)						562,174
Additional common stock issued | $						$ 17,800,000
Class A Common Stock, $0.0001 par value | Merger Agreement
Class Of Stock [Line Items]
Common stock, issued (in shares)						2,960,731
Common stock | $						$ 93,900,000
Payment of stock issuance costs | $						$ 91,600,000
Class A Common Stock, $0.0001 par value | Common Stock Purchase Agreement and Registration Rights Agreement
Class Of Stock [Line Items]
Proceeds from issuance of private placement | $			$ 500,000,000		$ 500,000,000
Number of shares issued in transaction				2,547,500
Proceeds from common stock purchase agreement | $				$ 54,900,000
Class A Common Stock, $0.0001 par value | Greenidge Common Stock
Class Of Stock [Line Items]
Additional common stock issued (in shares)		5,720,951
Common Class B
Class Of Stock [Line Items]
Common stock, authorized (in shares)																		600,000,000
Greenidge common stock value per share (in dollars per share) | $ / shares																		$ 0.0001
Conversion ratio									4
Number of shares converted								720,000
Common stock, issued (in shares)													28,526,372		28,526,372	28,526,372
Number of votes | vote													10		10	10
Common stock, outstanding (in shares)													28,526,372		28,526,372	28,526,372
Common stock, convertible, conversion ratio													1		1	1
GGHI Class B Common Stock
Class Of Stock [Line Items]
Number of shares issued in exchange for acquisition of ownership interests									28,000,000
GGHI Class B Common Stock | Private Placement
Class Of Stock [Line Items]
Number of shares converted									750
GGHI Class B Common Stock | Greenidge Common Stock
Class Of Stock [Line Items]
Number of shares issued in exchange for acquisition of ownership interests									7,000,000
Series A Redeemable Convertible Preferred Stock | Private Placement
Class Of Stock [Line Items]
Number of shares sold in private placement									1,620,000
Price per share sold in private placement (in dollars per share) | $ / shares									$ 25
Preferred stock, convertible, conversion ratio									4