Quarterly report pursuant to Section 13 or 15(d)

STOCK BASED COMPENSATION - Stock-based Compensation Expense (Details)

v3.21.2
STOCK BASED COMPENSATION - Stock-based Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock based compensation expenses $ 9,951 $ 1,895 $ 16,167 $ 4,228
Research and development        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock based compensation expenses 4,450 893 7,205 2,176
General and administrative expenses        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock based compensation expenses 3,138 616 5,332 1,070
Sales and marketing expense        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock based compensation expenses 1,732 294 2,653 715
Cost of sales        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock based compensation expenses $ 631 $ 92 $ 977 $ 267