Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Assumptions (Details)

v3.22.1
Stock-Based Compensation - Assumptions (Details) - Stock Options - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected dividend yield $ 0 $ 0
Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Volatility 90.01% 74.61%
Expected term (in years) 5 years 8 months 8 days 5 years 6 months 18 days
Risk-free rate 0.69% 0.25%
Weighted average grant date fair value per share (in dollars per share) $ 2.07 $ 0.16
Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Volatility 106.22% 74.89%
Expected term (in years) 5 years 11 months 4 days 5 years 10 months 13 days
Risk-free rate 1.08% 0.39%
Weighted average grant date fair value per share (in dollars per share) $ 3.44 $ 0.18