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Share capital and additional paid-in capital | 12 Months Ended
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Dec. 31, 2017
Equity [Abstract] |
Stockholders' Equity Note Disclosure [Text Block] | 13. 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 18) 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.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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