SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) segments	Dec. 31, 2023 USD ($) client	Dec. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) Segment	Dec. 31, 2022 USD ($) client	Dec. 31, 2021 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net assets	$ (48,554,000)	$ (48,554,000)	$ (48,554,000)	$ (48,554,000)	$ (48,554,000)	$ (45,792,000)	$ (39,316,000)
Number of reportable segments		3			3
Unbilled receivables	5,163,000	$ 5,163,000	5,163,000	5,163,000	$ 5,163,000	8,523,000
Share-based compensation	250,000					268,000
Goodwill, impairment loss	0					0
Compensation expense, bonus	500,000					6,100,000
Accumulated deficit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net assets	$ 425,247,000	$ 425,247,000	$ 425,247,000	$ 425,247,000	$ 425,247,000	427,394,000	$ 434,523,000
Cumulative-effect adjustment from adoption of ASU 2016-13, Credit Losses
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net assets						51,000
Cumulative-effect adjustment from adoption of ASU 2016-13, Credit Losses | Accumulated deficit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net assets						$ 51,000
Revenue
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, number of customers | client			25			25
Customer Concentration Risk | Top 25 Clients | Revenue
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage				85.00%		75.00%
Customer Concentration Risk | Three Customers | Revenue
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage				50.00%
Customer Concentration Risk | One Contracting Customer | Accounts Receivable
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage				20.00%