STOCK-BASED COMPENSATION - Schedule of stock-based compensation expense (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Stock-Based Compensation (Details) [Line Items]
Total stock-based compensation expense	$ 170		$ 206		$ 336	$ 430
Issuance of common stock for service		$ 100	1	$ 3
Research and development
Stock-Based Compensation (Details) [Line Items]
Total stock-based compensation expense	5		3		9	4
Selling, general and administrative
Stock-Based Compensation (Details) [Line Items]
Total stock-based compensation expense	165		$ 203		327	$ 426
Issuance of common stock for service	$ 56				$ 56