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Note 23 - Equity-settled Share-based Expense - Inputs for Measurement of Grant Date Fair Values (Details) | 12 Months Ended |
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Dec. 31, 2017 USD ($) | Dec. 31, 2017 CAD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2016 CAD ($) | Dec. 31, 2015 CAD ($) | Dec. 31, 2015 USD ($)
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |
Options granted |  | 5,000 | [1] | 5,000 | [1] | 18,000 | [1] | 18,000 | [1] | 23,000 |
Risk-free interest rate |  | 2.40% |  | 2.40% |  | 0.53% |  | 0.53% |  |  |
Expected stock price volatility (based on historical volatility) |  | 118.00% |  | 118.00% |  | 119.00% |  | 119.00% |  |  |
Expected option life in years |  | 3 |  | 3 |  | 5 |  | 5 |  |  |
Exercise price | [1] |  |  | $ 8.10 |  |  |  | $ 11.50 |  |  |
Share price at grant date | [1] |  |  | $ 8.10 |  |  |  | $ 11.50 |  |  |
Fair value at grant date | [1] | $ 5.81 |  |  |  | $ 9.45 |  |  |  |  |
Options granted on December 21, 2015 [member] |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |
Options granted | [1] |  |  |  |  |  |  |  |  | 90,000 |
Risk-free interest rate |  |  |  |  |  |  |  |  |  | 0.53% |
Expected stock price volatility (based on historical volatility) |  |  |  |  |  |  |  |  |  | 412.00% |
Expected option life in years |  |  |  |  |  |  |  |  |  | 5 |
Exercise price | [1] |  |  |  |  |  |  |  |  | $ 0.74 |
Share price at grant date | [1] |  |  |  |  |  |  |  |  | $ 0.74 |
Fair value at grant date | [1] |  |  |  |  |  |  |  |  |  | $ 0.27
Options granted on October 7, 2015 [member] |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |
Options granted | [1] |  |  |  |  |  |  |  |  | 25,000 |
Risk-free interest rate |  |  |  |  |  |  |  |  |  | 0.53% |
Expected stock price volatility (based on historical volatility) |  |  |  |  |  |  |  |  |  | 396.00% |
Expected option life in years |  |  |  |  |  |  |  |  |  | 5 |
Exercise price | [1] |  |  |  |  |  |  |  |  | $ 0.80 |
Share price at grant date | [1] |  |  |  |  |  |  |  |  | $ 0.79 |
Fair value at grant date | [1] |  |  |  |  |  |  |  |  |  | $ 0.27
Restricted stock units (RSUs) [member] |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share price at grant date |  | 7.37 |  |  |  | 5.50 |  |  |  |  |
Fair value (USD) |  | 7.37 |  |  |  | 5.50 |  |  |  |  |
Performance share units (PSUs) [member] |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share price at grant date |  | 7.37 |  |  |  | 5.50 |  |  |  |  |
Fair value (USD) |  | $ 7.17 |  |  |  | $ 5.25 |  |  |  |  |
Performance multiplier percentage |  | 94.00% |  | 94.00% |  | 100.00% |  | 100.00% |  |  |
[1] | Amounts stated after the 1:5 share consolidation, refer note 19.

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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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