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DEBT - Carrying Value (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	May 21, 2022
Debt instruments
Principal loan balance	$ 33,957	$ 33,957
Unamortized debt discount and issuance cost	(459)	(532)
Cumulative accretion of exit fee	1,004	765
Total debt	34,502	34,190
Less: current portion of long-term debt	(5,992)
Long-term debt, net	$ 28,510	$ 34,190
Loan Agreement
Debt instruments
Principal loan balance			$ 33,957	$ 80,000

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