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Financial Instruments - Additional Information (Details) - CAD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disclosure Of Financial Instruments [Line Items]
Percentage of change in financial assets	2.00%	1.00%
Percentage of change in financial liabilities	3.00%	1.00%
Restricted short-term investments	$ 664	$ 550
Allowance for doubtful accounts	78
Maximum exposure to credit risk	344,659	$ 108,165
Gross cash proceeds from equity financing	$ 54,876
Government Agencies
Disclosure Of Financial Instruments [Line Items]
Portion of receivable	19.00%	55.00%
Credit Card Processor And Bill Payment
Disclosure Of Financial Instruments [Line Items]
Portion of receivable	42.00%	30.00%
Interest Rate Risk
Disclosure Of Financial Instruments [Line Items]
Restricted short-term investments	$ 65,395
Liqudity Risk
Disclosure Of Financial Instruments [Line Items]
Gross cash proceeds from equity financing	$ 470,670

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- Definition

The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2018-01-01
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 16
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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2018-01-01
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 9
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_9_a&doctype=Standard&book=B
-URIDate 2017-03-09

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