Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Capital Stock, Stock Plans and Stock Based Compensation - Schedule of Stock Options Roll Forward (Details) (Parenthetical) - Stock Option [Member] - $ / shares
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Stock option exercise price per share lower limit $ 2.79 $ 2.79
Stock option exercise price per share upper limit $ 8.40 $ 13.35