NET LOSS PER SHARE - Computation of Net loss per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator
Net loss	$ (17,498)	$ (16,067)	$ (14,660)	$ (12,949)	$ (10,353)	$ (6,815)	$ (48,225)	$ (30,117)
Denominator
Weighted-average shares outstanding used in computing net loss per share, basic	51,844,904			49,264,938			50,345,841	33,535,829
Weighted-average shares outstanding used in computing net loss per share, diluted	51,844,904			49,264,938			50,345,841	33,535,829
Net loss per share, basic	$ (0.34)			$ (0.26)			$ (0.96)	$ (0.90)
Net loss per share, diluted	$ (0.34)			$ (0.26)			$ (0.96)	$ (0.90)