NET LOSS PER SHARE - Basic and diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
NET LOSS PER SHARE
Net income /(loss) (numerator), Basic (in dollars)	$ (27,526)	$ (28,858)	$ (96,725)	$ (18,382)
Net income /(loss) (numerator), Diluted (in dollars)	$ (27,526)	$ (28,858)	$ (96,725)	$ (18,382)
Weighted-average shares (denominator), basic (in shares)	43,718,351	43,598,350	43,715,451	43,019,217
Weighted-average shares (denominator), diluted (in shares)	43,718,351	43,598,350	43,715,451	43,019,217
Basic net income / (loss) per share (in dollars per share)	$ (0.63)	$ (0.66)	$ (2.21)	$ (0.43)