COMMITMENTS, CONTINGENCIES AND REGULATORY MATTERS - Lease Activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Lessee, Lease, Description [Line Items]
Cash used in operating activities for amounts included in the measurement of lease liabilities	$ 1,182	$ 3,078
Short-term (twelve months or less) lease costs	28	481
Selling, general and administrative expense
Lessee, Lease, Description [Line Items]
Operating lease costs:	934	2,092
Cost of revenue
Lessee, Lease, Description [Line Items]
Operating lease costs:	$ 265	$ 171