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Share Capital (Narrative) (Details) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Feb. 28, 2017 USD ($) shares / $ shares | Dec. 31, 2017 USD ($) shares | Dec. 31, 2016 USD ($) | May 29, 2017 $ / shares
Disclosure of classes of share capital [line items] |  |  |  |
Issue of equity |  | $ 74,804,000 | $ 122,813,000 |
Number of shares that remain available under the plan for issuance | shares |  | 2,222,905 |  |
Expense from share-based payment transactions with employees |  | $ 3,841,000 | 14,138,000 |
Stock Options Clase of Share Capital [member] |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Issuance of common shares, shares | shares | 11,873,750 |  |  |
Shares issed for the period per share amount | shares / $ | 6.30 |  |  |
Proceeds from issuing shares, gross | $ 74,804,000 |  |  |
Proceeds from issuing shares | $ 70,497,000 |  |  |
Number of shares authorised | shares |  | 12,200,000 |  |
Granted, options | shares |  | 617,694 |  |
Risk free interest rate, share options granted |  | 0.77% |  |
Expected volatility, share options granted |  | 63.02% |  |
Option life, share options granted |  | 3 |  |
Description of expected forfeiture rate |  | 5.57 |  |
Expected dividend, share options granted |  | $ 0 |  |
Description of option pricing model, share options granted |  | Black-Scholes model |  |
Fair value per share granted options | $ / shares |  |  |  | $ 2.61
Expense from share-based payment transactions with employees |  | $ 674,000 | $ 468,000 |

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- Definition The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_47_a_i&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_47_a_i&doctype=Standard -URIDate 2017-03-09 + Details
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