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Share Capital - Summary of Warrants (Parenthetical) (Details) - CAD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disclosure Of Warrants [Line Items]
Share issue costs	$ 2,448	$ 2,448
Greenstar investment | Warrants
Disclosure Of Warrants [Line Items]
Share issue costs	$ 253

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- Definition

Disclosure of warrants.

+ References

No definition available.

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- Definition

The amount of cost related to the issuance of shares.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 106
-Subparagraph d
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-URIDate 2017-03-09

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