Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation - Stock Option Activity (Details)

v3.21.2
Stock Based Compensation - Stock Option Activity (Details) - $ / shares
9 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Sep. 30, 2021
Weighted Average Grant Date Fair Value  per Option      
Weighted Average Remaining Contractual Life (Years) 5 years 3 months 18 days 5 years 6 months  
Stock options      
Number of Options      
Number of options exercisable (in shares) 1,178,411   1,178,411
Weighted Average Exercise Price per Option      
Weighted average exercise price per option, exercisable (in usd per share) $ 1.07   $ 1.07
Weighted Average Grant Date Fair Value  per Option      
Options exercisable, Weighted Average Remaining Contractual life (Years)     6 months
Stock options | Directors, Officers, Consultants and Employees      
Number of Options      
Beginning balance (in shares)     2,351,240
Granted (in shares)     523,713
Exercised (in shares)     (884,954)
Forfeited (in shares)     (170,000)
Expired (in shares)     (56,000)
Ending balance (in shares) 1,763,999 2,351,240 1,763,999
Weighted Average Exercise Price per Option      
Beginning balance (in usd per share)     $ 2.00
Exercise price (in usd per share)     11.32
Exercised (in usd per share)     3.20
Forfeited (in usd per share)     0.94
Expired (in usd per share)     6.13
Ending balance (in usd per share) $ 4.14 $ 2.00 4.14
Weighted Average Grant Date Fair Value  per Option      
Granted (in usd per share)     $ 5.73