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Shareholders Equity and Capital Stock (Details 3) - $ / shares
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Shareholders' Equity and Capital Stock      
Number of RSUs Unvested, Beginning Balance 1,155,928 985,496 1,175,952
Number of RSUs Unvested, Granted 737,553 713,106 470,756
Number of RSUs Released (475,086)   (621,092)
Number of RSUs Forfeited 13,433 (542,674) (40,120)
Number of RSUs Unvested, Ending Balance 1,404,962 1,155,928 985,496
Number of RSUs Unvested, Beginning Balance, Weighted average grant date fair value $ 0.65 $ 0.67 $ 0.65
Granted, Weighted average grant date fair value 0.48 0.61 0.71
Released, Weighted average grant date fair value 0.70   0.63
Forfeited, Weighted average grant date fair value 0.61 0.68 0.57
Number of RSUs Unvested, Ending Balance, Weighted Average Grant Date Fair Value $ 0.54 $ 0.65 $ 0.67