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Share Capital - Summary of Outstanding Stock Options (Details) | Mar. 31, 2018 CAD ($) shares Year
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Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Share Options [Line Items] |
Exercise price of share options exercisable | $ 4.55
Weighted Average Remaining Contractual Life (3.41 years) |
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Share Options [Line Items] |
Options Outstanding | shares | 3,471,904
Options Outstanding | Year | 3.41
Options Exercisable | shares | 1,569,274
Weighted Average Remaining Contractual Life (3.41 years) | Minimum |
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Share Options [Line Items] |
Options Outstanding | $ 0.56
Exercise price of share options exercisable | 0.56
Weighted Average Remaining Contractual Life (3.41 years) | Maximum |
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Share Options [Line Items] |
Options Outstanding | 3.78
Exercise price of share options exercisable | $ 3.78
Weighted Average Remaining Contractual Life (5.13 years) |
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Share Options [Line Items] |
Options Outstanding | shares | 5,731,691
Options Outstanding | Year | 5.13
Options Exercisable | shares | 577,665
Weighted Average Remaining Contractual Life (5.13 years) | Minimum |
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Share Options [Line Items] |
Options Outstanding | $ 3.79
Exercise price of share options exercisable | 3.79
Weighted Average Remaining Contractual Life (5.13 years) | Maximum |
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Share Options [Line Items] |
Options Outstanding | 8.51
Exercise price of share options exercisable | $ 8.51
Weighted Average Remaining Contractual Life (4.91 years) |
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Share Options [Line Items] |
Options Outstanding | shares | 2,712,240
Options Outstanding | Year | 4.91
Options Exercisable | shares | 536,254
Weighted Average Remaining Contractual Life (4.91 years) | Minimum |
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Share Options [Line Items] |
Options Outstanding | $ 8.52
Exercise price of share options exercisable | 8.52
Weighted Average Remaining Contractual Life (4.91 years) | Maximum |
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Share Options [Line Items] |
Options Outstanding | 11.76
Exercise price of share options exercisable | $ 11.76
Weighted Average Remaining Contractual Life (5.67 years) |
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Share Options [Line Items] |
Options Outstanding | shares | 1,540,000
Options Outstanding | Year | 5.67
Options Exercisable | shares | 16,667
Weighted Average Remaining Contractual Life (5.67 years) | Minimum |
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Share Options [Line Items] |
Options Outstanding | $ 11.77
Exercise price of share options exercisable | 11.77
Weighted Average Remaining Contractual Life (5.67 years) | Maximum |
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Share Options [Line Items] |
Options Outstanding | 27.94
Exercise price of share options exercisable | $ 27.94
Weighted Average Remaining Contractual Life (5.88 years) |
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Share Options [Line Items] |
Options Outstanding | shares | 3,790,000
Options Outstanding | Year | 5.88
Weighted Average Remaining Contractual Life (5.88 years) | Minimum |
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Share Options [Line Items] |
Options Outstanding | $ 27.95
Exercise price of share options exercisable | 27.95
Weighted Average Remaining Contractual Life (5.88 years) | Maximum |
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Share Options [Line Items] |
Options Outstanding | 33.66
Exercise price of share options exercisable | $ 33.66
Weighted Average Remaining Contractual Life (4.96 years) |
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Share Options [Line Items] |
Options Outstanding | shares | 17,245,835
Options Outstanding | Year | 4.96
Options Exercisable | shares | 2,699,860

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