SEGMENTS - Geographical Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 309,204	$ 298,542	$ 267,116
Property and equipment	3,323	5,916
United States
Segment Reporting Information [Line Items]
Revenues	291,420	275,256	246,315
Property and equipment	3,244	4,453
United Kingdom
Segment Reporting Information [Line Items]
Revenues	17,785	23,286	$ 20,801
Property and equipment	$ 79	$ 1,463