Quarterly report pursuant to Section 13 or 15(d)

Stock Option Plan and Stock-Based Compensation - Stock-Based Compensation Expense (Details)

v3.21.2
Stock Option Plan and 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 Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Stock-based compensation expense $ 676 $ 466 $ 1,751 $ 1,243
Unrecognized compensation cost 3,400   $ 3,400  
Unrecognized compensation cost, period for recognition     2 years 6 months 7 days  
Research and development        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Stock-based compensation expense 211 219 $ 598 601
Selling and marketing        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Stock-based compensation expense 105 145 280 358
General and administrative        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Stock-based compensation expense $ 360 $ 102 $ 873 $ 284