CONTINGENT FORWARD CONTRACTS - Narrative (Details) - USD ($)		1 Months Ended									2 Months Ended	12 Months Ended
	Dec. 24, 2020	Apr. 30, 2021	Mar. 31, 2021	Feb. 28, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Oct. 31, 2019	Apr. 30, 2019	Apr. 30, 2021	Dec. 31, 2022	Dec. 31, 2021		Dec. 31, 2020		Apr. 01, 2021
Forward Contract Indexed to Issuer's Equity [Line Items]
Contingent forward contract liability, fair value loss												$ 0	$ 454,546,000		$ 118,382,000
Change in fair value of forward contracts												0	454,546,000		118,382,000
Stock price (in dollars per share)																	$ 23.78
Eligible Holders
Forward Contract Indexed to Issuer's Equity [Line Items]
Aggregate value of convertible preferred shares approved for issuance				$ 71,000,000
Series D
Forward Contract Indexed to Issuer's Equity [Line Items]
Proceeds from issuance of convertible preferred stock							$ 200,000,000	$ 200,000,000	$ 400,000,000	$ 200,000,000		0	3,000,000		$ 400,000,000
Issuance of convertible preferred shares (in shares)							82,496,121	82,496,092							164,992,213	[1]
Settlement of Series D contingent forward contract liability							$ 21,384,000	$ 18,180,000							$ 39,563,000
Issuance of convertible preferred shares															400,000,000
Series E
Forward Contract Indexed to Issuer's Equity [Line Items]
Proceeds from issuance of convertible preferred stock	$ 400,000,000	$ 92,900,000	$ 107,100,000	$ 400,000,000	$ 400,000,000	$ 500,000,000					$ 200,000,000	$ 0	$ 600,000,000		$ 899,725,000
Issuance of convertible preferred shares (in shares)	133,818,821	66,909,408		133,818,821		167,273,525							200,728,229	[1]	301,092,346	[1]
Settlement of Series D contingent forward contract liability															$ 110,456,000
Preferred stock, price (in dollars per share)		$ 2.99		$ 2.99		$ 2.99					$ 2.99
Issuance of convertible preferred shares				$ 400,000,000									$ 3,206,159,000		898,932,000
Series E | Eligible Holders
Forward Contract Indexed to Issuer's Equity [Line Items]
Preferred stock, price (in dollars per share)				$ 2.99
Convertible preferred shares approved for issuance (in shares)				23,737,221
Series E | Additional Purchasers
Forward Contract Indexed to Issuer's Equity [Line Items]
Preferred stock, price (in dollars per share)				$ 2.99
Series E | Management
Forward Contract Indexed to Issuer's Equity [Line Items]
Issuance of convertible preferred shares (in shares)											3,034,194
Series E | Director
Forward Contract Indexed to Issuer's Equity [Line Items]
Issuance of convertible preferred shares (in shares)											1,658,705
Series E | Chief Executive Officer
Forward Contract Indexed to Issuer's Equity [Line Items]
Issuance of convertible preferred shares (in shares)		535,275
Series D Contingent Forward Contract Liability
Forward Contract Indexed to Issuer's Equity [Line Items]
Contingent forward contract, fair value					0			36,400,000							0
Contingent forward contract reclassified to preferred shares								$ 18,200,000
Settlement of Series D contingent forward contract liability							$ 39,600,000
Contingent forward contract liability, fair value loss															8,700,000
Series E Contingent Forward Contract Liability
Forward Contract Indexed to Issuer's Equity [Line Items]
Contingent forward contract, fair value	$ 110,500,000	$ 722,400,000		$ 1,444,900,000	$ 110,500,000	$ 800,000					$ 722,400,000		$ 0		110,500,000
Contingent forward contract reclassified to preferred shares		$ 1,200,000,000
Contingent forward contract liability, fair value loss															$ 109,700,000

[1] The number of shares of convertible preferred stock and common stock issued and outstanding prior to the Merger have been retroactively adjusted by the Exchange Ratio (as defined in Note 3 “Reverse Recapitalization”) to give effect to the reverse recapitalization treatment of the Merger. See Note 1 “Description of Business” and Note 3 “Reverse Capitalization” for more information.