NET INCOME (LOSS) PER SHARE - Calculation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
NET INCOME (LOSS) PER SHARE
Net loss	$ 6,835	$ (1,147)	$ 7,190	$ (5,297)
Basic weighted-average shares outstanding (in shares)	37,859	37,028	37,799	37,316
Effect of dilutive stock options, unvested restricted stock units, and shares of common stock expected to be issued under Employee Purchase Plan	1,217		1,169
Diluted weighted-average shares outstanding (in shares)	39,076	37,028	38,968	37,316
Basic (in dollars per share)	$ 0.18	$ (0.03)	$ 0.19	$ (0.14)
Diluted (in dollars per share)	$ 0.17	$ (0.03)	$ 0.18	$ (0.14)