XML 46 R36.htm IDEA: XBRL DOCUMENT v3.22.2
Stock-Based Compensation - Evergreen provision (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jan. 01, 2022
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
2019 Plan          
Number of Options          
Period of automatic increase in shares reserved       10 years  
Percentage of the common shares outstanding (as a percent)       4.00%  
Number of shares added (In shares) 1,066,470        
2019 Plan | Stock options          
Number of Options          
Vested   23,333 25,000 47,221 50.000
Forfeited, nonvested   26,666 0 60,000 270,287
2021 inducement plan and 2019 plan          
Unrecognized share-based compensation          
Unrecognized share-based compensation cost   $ 1.0   $ 1.0  
Unrecognized share-based compensation - Weighted average period       1 year 3 months 18 days  
2021 inducement plan and 2019 plan | Stock options          
Number of Options          
Aggregate maximum number of shares of common stock that may be issued   5,415,586   5,415,586  
Maximum | 2019 Plan          
Number of Options          
Aggregate maximum number of shares of common stock that may be issued   6,680,000   6,680,000