Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
STOCK-BASED COMPENSATION - Summary of Stock-based Compensation Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Stock-based compensation expense $ 2,029 $ 731 $ 2,929 $ 1,355
Capitalized stock-based compensation 111 141 320 302
Selling and marketing        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Stock-based compensation expense 14 24 32 47
General and administrative        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Stock-based compensation expense 1,238 263 1,469 525
Research and development        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Stock-based compensation expense $ 777 $ 444 $ 1,428 $ 783