FAIR VALUE MEASUREMENTS - Schedule of Changes in Fair Value Liabilities on Recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at end of period	$ 0	$ 154,395
Warrant liabilities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	0	3,329
Fair value of warrants issued	0	5,096
Change in fair value	0	8,426
Fair value of warrants exercised	0	(356)
Balance at end of period	0	16,495
Redeemable Convertible Preferred Stock
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	0	22,911
Change in fair value	0	138,141
Fair value of derivatives extinguished	0	(23,152)
Balance at end of period	$ 0	$ 137,900