Annual report pursuant to Section 13 and 15(d)

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

v3.20.1
Stock-Based Compensation - Summary of Stock Option Activity Including Options Form of Warrants (Details) - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Share-based Payment Arrangement [Abstract]    
Number of shares, stock options outstanding, at the beginning 7,750,000 7,470,000
Number of shares, Granted 800,000 400,000
Number of shares, Exercised   (20,000)
Number of shares, Expired (700,000) (100,000)
Number of shares, stock options outstanding, at the end 7,850,000 7,750,000
Number of shares, stock options exercisable, at the end 7,850,000 7,550,000
Weighted average exercise price, stock options outstanding, at the beginning $ 0.583 $ 0.545
Weighted average exercise price, granted 1.038 0.280
Weighted average exercise price, exercised 0.150
Weighted average exercise price, expired 0.321 0.130
Weighted average exercise price, stock options outstanding, at the end 0.608 0.583
Weighted average exercise price, stock options exercisable, at the end $ 0.608 $ 0.545
Weighted average remaining contractual life (in years), stock options outstanding 3 years 1 month 20 days  
Weighted average remaining contractual life (in years), stock options exercisable 3 years 1 month 20 days