Annual report pursuant to Section 13 and 15(d)

Stock-based Plans and Stock-based Compensation (Stock Option Activity) (Details)

v3.21.1
Stock-based Plans and Stock-based Compensation (Stock Option Activity) (Details) - Employee Stock Option [Member] - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Outstanding at Beginning of Period 5,781,884 4,987,426  
Granted 1,545,000 2,592,500  
Exercised (15,000)  
Forfeit/canceled (814,068) (923,389)  
Expired (490,264) (874,653)  
Outstanding at End of Period 6,007,552 5,781,884 4,987,426
Expected to vest at End of Period 6,007,552    
Exercisable at End of Period 3,477,356    
Unrecognized expense at End of Period $ 1,734,104    
Weighted Average Exercise Price Per Share      
Outstanding at Beginning of Period $ 1.15 $ 1.16  
Granted 1.19 1.01  
Exercised 0.48  
Forfeit/canceled 0.94 1.00  
Expired 1.07 0.93  
Outstanding at End of Period 1.20 $ 1.15 $ 1.16
Vested 1.24    
Exercisable at end of period $ 1.24    
Weighted Average Remaining Contractual Life (Years)      
Outstanding, Weighted Average Remaining Contractual Term (Years) 6 years 9 months 7 days 7 years 1 month 28 days 7 years 1 month 13 days
Expected, Weighted Average Remaining Contractual Term (Years) 6 years 9 months 7 days    
Exercisable, Weighted Average Remaining Contractual Term (Years) 5 years 1 month 24 days    
Aggregate Intrinsic Value      
Aggregate Intrinsic Value, Outstanding $ 4,056,639 $ 527,868 $ 1,215,067
Expected to vest at End of Period 4,056,639    
Exercisable at End of Period $ 2,252,766