Financial Instruments - Summary of Impairment Losses on Accounts Receivable Recognized in Profit or Loss (Details) - CAD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Financial Instruments [Abstract]
Impairment loss (reversal) on trade receivables	$ (506)	$ 582
Impairment loss (reversal) on other receivables	(126)	170
Impairment loss (reversal) on accounts receivable	$ (632)	$ 752

The amount of impairment loss or reversal of impairment loss recognised in profit or loss for trade receivables. [Refer: Impairment loss recognised in profit or loss; Reversal of impairment loss recognised in profit or loss; Trade receivables]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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