SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Customer Concentration (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Concentration Risk [Line Items]
Net revenues	$ 96,708	$ 82,631
Accounts receivable, net of allowance for doubtful accounts of $69 as of March 31, 2022, and December 31, 2021	72,707		$ 62,813
Revenue Benchmark | Customer Concentration Risk | Customer A
Concentration Risk [Line Items]
Net revenues	$ 27,108	$ 19,626
Concentration risk, percentage	28.00%	23.80%
Revenue Benchmark | Customer Concentration Risk | Customer B
Concentration Risk [Line Items]
Net revenues	$ 16,712	$ 16,766
Concentration risk, percentage	17.30%	20.30%
Accounts Receivable | Customer Concentration Risk | Customer A
Concentration Risk [Line Items]
Concentration risk, percentage	11.20%		21.00%
Accounts receivable, net of allowance for doubtful accounts of $69 as of March 31, 2022, and December 31, 2021	$ 8,119		$ 13,161
Accounts Receivable | Customer Concentration Risk | Customer B
Concentration Risk [Line Items]
Concentration risk, percentage	16.10%		24.20%
Accounts receivable, net of allowance for doubtful accounts of $69 as of March 31, 2022, and December 31, 2021	$ 11,688		$ 15,174