RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS, Balance Sheet (Details) - USD ($)	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS [Abstract]
Net tangible asset threshold for redeeming Public Shares	$ 5,000,001
Balance Sheet [Abstract]
Class A common stock subject to possible redemption	300,000,000	$ 300,000,000	$ 300,000,000	$ 300,000,000
Additional paid-in capital	0	0	0	0
Accumulated deficit	(21,926,666)	(29,677,197)	(26,558,510)	(44,602,188)
Total Stockholders' Equity (Deficit)	$ (21,925,916)	$ (29,676,447)	$ (26,557,760)	$ (44,601,438)	$ (33,758,440)	$ (30,248,542)	$ (20,529,402)	$ (20,131,351)
Number of shares subject to possible redemption (in shares)		30,000,000	30,000,000
Class A Common Stock [Member]
Common Stock Subject to Possible Redemption [Abstract]
Common stock subject to possible redemption, price (in dollars per share)	$ 10.00			$ 10.00
Balance Sheet [Abstract]
Class A common stock	$ 0	$ 0	$ 0	$ 0
Number of shares subject to possible redemption (in shares)	30,000,000			30,000,000
As Previously Reported [Member]
Balance Sheet [Abstract]
Class A common stock subject to possible redemption		265,323,550	268,442,238
Additional paid-in capital		9,544,994	6,426,337
Accumulated deficit		(4,546,088)	(1,427,401)
Total Stockholders' Equity (Deficit)		$ 5,000,003	$ 5,000,002
Number of shares subject to possible redemption (in shares)		26,532,355	26,844,224
As Previously Reported [Member] | Class A Common Stock [Member]
Balance Sheet [Abstract]
Class A common stock		$ 347	$ 316
Adjustments [Member]
Balance Sheet [Abstract]
Class A common stock subject to possible redemption		34,676,450	31,557,762
Additional paid-in capital		(9,544,994)	(6,426,337)
Accumulated deficit		(25,131,109)	(25,131,109)
Total Stockholders' Equity (Deficit)		$ (34,676,450)	$ (31,557,762)
Number of shares subject to possible redemption (in shares)		3,467,645	3,155,776
Adjustments [Member] | Class A Common Stock [Member]
Balance Sheet [Abstract]
Class A common stock		$ (347)	$ (316)