SEGMENTS - Geographical Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 75,405	$ 58,853	$ 143,333	$ 112,083
Property and equipment	8,619		8,619		$ 11,273
United States
Segment Reporting Information [Line Items]
Revenues	69,178	54,145	130,831	103,262
Property and equipment	6,116		6,116		7,750
United Kingdom
Segment Reporting Information [Line Items]
Revenues	6,227	$ 4,708	12,502	$ 8,821
Property and equipment	2,379		2,379		3,423
India
Segment Reporting Information [Line Items]
Property and equipment	$ 124		$ 124		$ 100