Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Narrative (Details)

v3.22.1
Stock-Based Compensation - Narrative (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2022
USD ($)
$ / shares
shares
Sep. 30, 2021
office
$ / shares
shares
Dec. 31, 2021
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options granted (in shares) | shares 0 50,000  
Exercise price of stock options granted (in dollars per share) | $ / shares $ 0 $ 1.08  
Aggregate intrinsic value of options exercised $ 42    
Fair value of options vested $ 12    
Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period of award   1 year  
Number of equal monthly installments | office   12  
2018 Stock Option and Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of common stock shares (in shares) | shares 897,229    
Common stock reserved for issuance (in shares) | shares 3,550,935   762,038
Unrecognized stock compensation expense $ 5,309,000    
Weighed-average period of costs amortized 2 years 6 months    
2018 Employee Stock Purchase Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock reserved for issuance (in shares) | shares 1,008,039   189,215
Unrecognized stock compensation expense $ 283,000    
Weighed-average period of costs amortized 1 year 3 months 18 days    
2009 Stock Option and Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized stock compensation expense $ 3,000    
Weighed-average period of costs amortized 1 year