EQUITY BASED COMPENSATION - Compensation expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
EQUITY BASED COMPENSATION
Total equity based compensation - continuing operations	$ 2,231	$ 5,434
Total equity based compensation - discontinued operations	448	55
Total equity based compensation	2,679	5,489
Employee termination forfeitures	1,960	84
Accelerated equity compensation expense	523	1,237
Sales, general, and administrative
EQUITY BASED COMPENSATION
Total equity based compensation - continuing operations	2,052	5,252
Research and development
EQUITY BASED COMPENSATION
Total equity based compensation - continuing operations	$ 179	$ 182