Share capital and additional paid-in capital

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Stockholders' Equity Note Disclosure [Text Block]

14. Share capital and additional paid-in capital

Shares of redeemable preferred stock (“preferred shares”) are issued under the Company’s Employee Share Incentive Plan (see Note 19) and carry the same voting and dividend rights as shares of common stock (“common shares”). Preferred shares vest over four years and convert to common stock on a share for share basis on the fourth anniversary of each grant date. Preferred shares are only redeemable with the Company’s agreement. Upon liquidation, preferred shares rank in preference to the common shares to the extent of the par value of the preferred shares and any related additional paid in capital.