Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Options Other Info (Details)

v3.22.1
Stockholders' Equity - Options Other Info (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Options outstanding    
Closing price of Company's stock (in dollars per share) $ 0.55  
Employee Stock Option    
Options outstanding    
Unrecognized compensation expense $ 5.5  
Weighted average remaining period for recognition of unrecognized compensation expense 2 years 10 months 2 days  
Per-share weighted-average grant date fair value of options granted (in dollars per share) $ 0.46 $ 1.65
Employee Stock Option | Weighted-average    
Weighted-average assumptions:    
Expected term of options (in years) 6 years 3 months 18 days 6 years 2 months 12 days
Risk-free interest rate (as a percent) 1.50% 0.80%
Expected volatility (as a percent) 92.50% 97.50%