Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Stock Option Activities) (Details)

v3.21.2
Stockholders' Equity (Stock Option Activities) (Details) - USD ($)
$ / shares in Units, $ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Weighted Average Exercise Price    
Unrecognized compensation recognition period 1 year 10 months 24 days  
Stock Options [Member]    
Options rollforward    
Stock Options, Outstanding, Number, Beginning Balance 1,141,675  
Options, Outstanding, Number, Ending Balance 1,141,675 1,141,675
Options vested and exercisable 713,547  
Weighted Average Exercise Price    
Weighted Average Exercise Price, Beginning $ 5.73  
Weighted Average Exercise Price, Ending 5.73 $ 5.73
Weighted Average Exercise Price, options vested and exercisable $ 5.73  
Weighted Average Remaining Contractual Life, Options outstanding (in years) 5 years 6 months 21 days 6 years 3 months 21 days
Weighted Average Remaining Contractual Life, Options vested and exercisable (in years) 5 years 6 months 21 days  
Unrecognized share-based compensation $ 12,000.0  
Unrecognized compensation recognition period 1 month 6 days