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Share-Based Compensation - Narrative (Details)
$ / shares in Units, $ in Thousands
6 Months Ended
Jun. 30, 2022
USD ($)
$ / shares
shares
Jun. 30, 2021
USD ($)
shares
Jan. 01, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percent of fair value of shares, employees purchase     0.85
Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average grant date fair value (in dollars per share) $ 1.88    
Share price (in dollars per share) $ 0.64    
Unrecognized compensation expense related to non-vested stock options | $ $ 2,866    
Unrecognized compensation cost, recognition period 1 year 10 months 17 days    
Restricted stock units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation expense related to non-vested stock options | $ $ 334    
Unrecognized compensation cost, recognition period 2 years 8 months 15 days    
Employee Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock, discount on shares | $ $ 2 $ 11  
Shares purchased | shares 23,884 19,270  
Minimum | Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share price (in dollars per share) $ 0.71    
Maximum | Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share price (in dollars per share) $ 2.55