REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 153,120	$ 178,453
Revenue recognized when services are performed or assets are sold
Disaggregation of Revenue [Line Items]
Revenue	134,631	157,855
Revenue related to technology platforms and professional services
Disaggregation of Revenue [Line Items]
Revenue	10,450	14,043
Reimbursable expenses revenue
Disaggregation of Revenue [Line Items]
Revenue	$ 8,039	$ 6,555

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details