NET LOSS PER SHARE - Reconciliation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net loss	$ (9,100)	$ (10,379)
Weighted average number of shares - basic (in shares)	19,366,911	19,200,231
Weighted average number of shares - diluted (in shares)	19,366,911	19,200,231
Net loss per share - basic (in dollars per share)	$ (0.47)	$ (0.54)
Net loss per share - diluted (in dollars per share)	$ (0.47)	$ (0.54)