STOCKHOLDERS' EQUITY AND EQUITY INCENTIVE PLANS - Schedule of share-based compensation expense by line item (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expenses	$ 7,422	$ 6,059	$ 14,583	$ 11,727
Cost of revenue
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expenses	266	359	535	771
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expenses	1,131	1,111	2,272	2,139
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expenses	798	985	1,571	1,911
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expenses	$ 5,227	$ 3,604	$ 10,205	$ 6,906