SHARE-BASED AWARDS - RSU and Restricted Share Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Weighted- Average Grant-Date Fair Value
Retroactive conversion of shares due to Business Combination (in dollars per share)		$ (1.15)
RSUs
Number of RSUs
Unvested and Outstanding (in shares)		14,070,000
Retroactive conversion of shares due to Business Combination (in shares)		8,689,000
Beginning balance (in shares)	22,759,000
Granted (in shares)	29,189,000
Forfeited (in shares)	(5,423,000)
Ending balance (in shares)	46,525,000
Vested and outstanding (in shares)	0
Weighted- Average Grant-Date Fair Value
Weighted-Average Grant Date Fair Value (in dollars per share)		$ 6.79
Retroactive conversion of shares due to Business Combination (in dollars per share)		$ (2.59)
Beginning balance	$ 4.20
Granted (in dollars per share)	15.67
Forfeited (in dollars per share)	4.33
Ending balance	10.88
Vested and outstanding (in dollars per share)	$ 0
Restricted Shares
Number of RSUs
Unvested and Outstanding (in shares)		2,156,000
Retroactive conversion of shares due to Business Combination (in shares)		1,331,000
Beginning balance (in shares)	3,487,000
Granted (in shares)	0
Vested (in shares)	(1,339,000)
Ending balance (in shares)	2,148,000
Vested and outstanding (in shares)	0
Weighted- Average Grant-Date Fair Value
Weighted-Average Grant Date Fair Value (in dollars per share)		$ 5.98
Retroactive conversion of shares due to Business Combination (in dollars per share)		$ (2.28)
Beginning balance	$ 3.70
Granted (in dollars per share)	0
Vested (in dollars per share)	3.63
Ending balance	3.74
Vested and outstanding (in dollars per share)	$ 0