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REVENUE - Narrative (Details) - USD ($)	3 Months Ended		12 Months Ended
REVENUE - Narrative (Details) - USD ($)	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Revenue and Concentration Risk [Line Items]
Revenue increase (decrease) due to changes in estimated transaction price due to contractual adjustments	$ 3,000,000
Capitalized costs incurred to obtain or fulfill contract	$ 0
Government Contracts Concentration Risk \| Medicare \| Revenues
Revenue and Concentration Risk [Line Items]
Concentration risk (percent)	12.00%	11.00%
Customer concentration \| Medicare \| Accounts receivable
Revenue and Concentration Risk [Line Items]
Concentration risk (percent)	15.00%		12.00%