Annual report pursuant to Section 13 and 15(d)

Capital Stock, Stock Plans,Warrants, and Stock Based Compensation - Schedule of Stock Options Roll Forward (Details) (Parenthetical)

v3.21.1
Capital Stock, Stock Plans,Warrants, and Stock Based Compensation - Schedule of Stock Options Roll Forward (Details) (Parenthetical) - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Stock Option Outstanding [Member]    
Stock option exercise price per share lower limit $ 2.79 $ 2.79
Stock option exercise price per share upper limit 7.29 8.40
Stock Option Exercisable [Member]    
Stock option exercise price per share lower limit 2.79 2.79
Stock option exercise price per share upper limit $ 7.05 $ 8.40