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Share Capital - Summary of Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Equity [Abstract]    
Number of stock options outstanding, Outstanding at beginning of period 398,308 414,965
Number of stock options outstanding, Granted 11,630 10,000
Number of stock options outstanding, Exercised (2,487)
Number of stock options outstanding, Cancelled (24,170)
Number of stock options outstanding, Outstanding at end of period 409,938 398,308
Number of stock options outstanding, Vested at end of period 283,181 245,010
Weighted average exercise price, Outstanding at beginning of period $ 11.50 $ 11.70
Weighted average exercise price, Granted 8.6 9.00
Weighted average exercise price, Exercised
Weighted average exercise price, Cancelled
Weighted average exercise price, Outstanding at end of period 11.38 11.50
Weighted average exercise price, Vested at end of period $ 9.39 $ 8.45
Aggregate intrinsic value, Stock Options Outstanding at beginning of period $ 108 $ 1,859
Aggregate intrinsic value, Stock Options Outstanding at end of period 403 108
Aggregate intrinsic value, Vested at end of period $ 403 $ 108