XML 95 R57.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Share Capital - Stock Options (Narrative) (Details) - USD ($)
1 Months Ended 12 Months Ended
Apr. 30, 2013
May 31, 2013
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation award, common stock for purchase, exercise price     1    
Stock issued, exercise of stock options (in shares)     0 549,189 0
Proceeds from exercise of stock options     $ 0 $ 1,429,000 $ 0
Share-based compensation arrangement by share-based payment award, options, vested and expected to vest, outstanding, weighted average remaining contractual term     2 years 3 months 18 days    
Weighted average remaining contractual term of exercisable stock options     1 year 3 months 18 days    
Weighted average grant date fair value for options granted (in USD per share)     $ 0.89 $ 1.15 $ 1.11
Weighted average grant date fair value for options vested (in USD per share)     $ 1.10 $ 1.23 $ 1.31
Total fair value of stock options vested     $ 1,900,000 $ 2,800,000 $ 2,500,000
Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period     3 years    
Expected term during grantee's service   5 years      
Expected term after end of grantee's service   3 months      
Term for stock options granted prior to May of 2013 10 years