Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Summary of Stock Option Activity Including Options Form of Warrants (Details)

v3.21.1
Stock-Based Compensation - Summary of Stock Option Activity Including Options Form of Warrants (Details) - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]    
Number of shares, stock options outstanding, at the beginning 1,308,333 1,291,667
Number of shares, Granted 200,000 133,333
Number of shares, Exercised
Number of shares, Expired (33,333) (116,667)
Number of shares, stock options outstanding, at the end 1,475,000 1,308,333
Number of shares, stock options exercisable, at the end 1,325,000 1,308,333
Weighted average exercise price, stock options outstanding, at the beginning $ 3.648 $ 3.498
Weighted average exercise price, granted 7.140 6.228
Weighted average exercise price, exercised
Weighted average exercise price, expired 3.000 1.926
Weighted average exercise price, stock options outstanding, at the end 4.136 3.648
Weighted average exercise price, stock options exercisable, at the end $ 3.796 $ 3.648
Weighted average remaining contractual life (in years), stock options outstanding 3 years 1 month 2 days  
Weighted average remaining contractual life (in years), stock options exercisable 2 years 11 months 1 day