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Long term debt - Schedule of Long Term Debt (Details) - CAD CAD in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Long-term Debt, Current Maturities [Abstract] |  |
Current portion of long term debt | CAD 0 | CAD 8,169
Long-term Debt, Excluding Current Maturities [Abstract] |  |
Less: deferred financing costs | (1,935) | (60)
Long-term debt | 70,065 | 31,266
Convertible debentures |  |
Long-term Debt, Excluding Current Maturities [Abstract] |  |
Long-term debt, gross, non-current | 40,000 | 0
Credit facility |  |
Long-term Debt, Current Maturities [Abstract] |  |
Credit facility | 0 | 8,246
Less: deferred financing costs | 0 | (77)
Long-term Debt, Excluding Current Maturities [Abstract] |  |
Long-term debt, gross, non-current | CAD 32,000 | CAD 31,326

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- Definition Amount, after accumulated amortization, of debt issuance costs classified as current. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 + Details
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- Definition Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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