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Share Capital - Summary of Share-based Compensation Expense related to Acquisition and Asset Purchase Milestones (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2018 CAD ($) shares | Mar. 31, 2017 CAD ($) | Sep. 07, 2017 shares | Dec. 12, 2016 shares
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] |  |  |  |
Share-based compensation expense related to acquisition milestones | $ | $ 19,475 | $ 690 |  |
common shares issued |  |  | 111,366 | 490,641
Apollo/Bodystream |  |  |  |
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] |  |  |  |
Released during fiscal 2018 | 243,493 |  |  |
Remaining shares to be issued on completion of milestones* | 1,941,804 |  |  |
Share-based compensation expense related to acquisition milestones | $ | $ 5,095 | $ 690 |  |
Spectrum Cannabis GmbH |  |  |  |
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] |  |  |  |
Remaining shares to be issued on completion of milestones* | 23,570 |  |  |
Share-based compensation expense related to acquisition milestones | $ | $ 349 |  |  |
Spot |  |  |  |
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] |  |  |  |
Remaining shares to be issued on completion of milestones* | 30,658 |  |  |
Share-based compensation expense related to acquisition milestones | $ | $ 330 |  |  |
Spectrum Denmark |  |  |  |
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] |  |  |  |
Remaining shares to be issued on completion of milestones* | 1,906,214 |  |  |
Share-based compensation expense related to acquisition milestones | $ | $ 7,206 |  |  |
BC Tweed |  |  |  |
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] |  |  |  |
Released during fiscal 2018 | 155,158 |  |  |
Remaining shares to be issued on completion of milestones* | 240,061 |  |  |
Share-based compensation expense related to acquisition milestones | $ | $ 5,001 |  |  |
Vert Mirabel |  |  |  |
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] |  |  |  |
Remaining shares to be issued on completion of milestones* | 84,903 |  |  |
Share-based compensation expense related to acquisition milestones | $ | $ 1,131 |  |  |
Green Hemp |  |  |  |
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] |  |  |  |
Remaining shares to be issued on completion of milestones* | 24,567 |  |  |
Share-based compensation expense related to acquisition milestones | $ | $ 167 |  |  |
Intellectual property acquisition |  |  |  |
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] |  |  |  |
Remaining shares to be issued on completion of milestones* | 33,804 |  |  |
Share-based compensation expense related to acquisition milestones | $ | $ 196 |  |  |
Apollo C R O Inc |  |  |  |
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] |  |  |  |
common shares issued | 1,111,702 |  |  |
Body Stream |  |  |  |
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] |  |  |  |
common shares issued | 1,073,595 |  |  |

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