Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Restricted Stock Awards (Details)

v3.21.2
Stock-Based Compensation - Restricted Stock Awards (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation, award vesting period 4 years  
Stock-based compensation, cost unrecognized, period for recognition 1 year 1 month 6 days  
Restricted Stock Awards (RSA)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation, cost unrecognized $ 98  
Stock-based compensation, cost unrecognized, period for recognition 1 year 6 months  
Stock-based compensation, grant date fair value of awards vested $ 6  
Minimum | Restricted Stock Awards (RSA)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation, award vesting period   3 years
Maximum | Restricted Stock Awards (RSA)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation, award vesting period   4 years