Accounts Receivable And Other Receivables - Summary of Accounts Receivable and Other Receivable (Details) - CAD ($) $ in Thousands	12 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Concentration Risk1 [Line Items]
Trade accounts receivable, net	$ 59,537	$ 57,011
Trade accounts receivable from shareholders exercising significant influence	6,718	9,653
Other receivables	1,407	482
Trade and other current receivables	$ 67,662	$ 67,146
Trade accounts receivable \| One customer
Concentration Risk1 [Line Items]
Concentration percentage	10.00%	14.00%

Concentration Risk1

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Concentration Risk, Percentage1

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- Definition

Trade accounts receivable from shareholders exercising significant influence.

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- Definition

The amount receivable by the entity that it does not separately disclose in the same statement or note.

+ References

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- Definition

The amount of current trade receivables and current other receivables. [Refer: Current trade receivables; Other current receivables]

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- Definition

The amount due from customers for goods and services sold.

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