NET LOSS PER SHARE- Schedule of Shares Outstanding Were Excluded from the Calculation of Diluted Net Loss Per Ordinary Share (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net Loss Per Share [Line Items]
Shares issuable upon exercise of stock options	34,145,152	33,772,485	33,815,815	33,986,646
Shares issuable upon vesting of non-vested shares	1,347,060	0	1,011,788	0
Shares issuable upon vesting of Capped non-vested shares	660,122	0	331,885	0
Shares issuable upon exercise of warrants	28,437,000	0	28,437,000	0
Shares issuable upon conversion of non-controlling interests of a subsidiary	0	17,253,182	0	17,253,182
Shares issuable upon vesting of Earn-out shares	19,999,988	0	19,999,988	0
Shares issuable that may be subject to cancellation	1,687,500	0	1,687,500	0
Shares issuable upon conversion of Series B2 Preferred
Net Loss Per Share [Line Items]
Shares issuable upon conversion of Series	0	8,545,490	0	8,545,490
Shares issuable upon conversion of Series C1 Preferred
Net Loss Per Share [Line Items]
Shares issuable upon conversion of Series	0	26,757,258	0	26,757,258
Shares issuable upon conversion of Series C2 Preferred
Net Loss Per Share [Line Items]
Shares issuable upon conversion of Series	0	20,249,450	0	20,249,450
Shares issuable upon conversion of Series D1 Preferred
Net Loss Per Share [Line Items]
Shares issuable upon conversion of Series	0	22,311,516	0	22,311,516
Shares issuable upon conversion of Series D2 Preferred
Net Loss Per Share [Line Items]
Shares issuable upon conversion of Series	0	16,432,674	0	16,432,674