SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Sep. 17, 2020
Net Income (Loss) per Common Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)							18,100,000	68,109,671
Numerator [Abstract]
Net loss	$ (34,456)	$ (5,335)	$ (7,857)	$ (1,501)	$ (1,094)	$ (2,128)	$ (47,647)	$ (4,723)
Denominator [Abstract]
Net loss per share attributable to common stockholders, basic and diluted	$ (0.36)			$ (0.07)			$ (1.00)	$ (0.22)
Class A Common Stock Subject to Possible Redemption [Abstract]
Temporary equity, shares outstanding									61,809,312
Private Placement Warrants [Member]
Class A Common Stock Subject to Possible Redemption [Abstract]
Temporary equity, shares outstanding										6,600,000
Private Placement Warrants [Member] | Class A Redeemable Common Stock [Member]
Net Income (Loss) per Common Share [Abstract]
Exercise price of warrants	$ 11.50						$ 11.50