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Share-based payment arrangements - Summary of assumptions used to estimate the fair value of options granted (Details) - CAD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of range of exercise prices of outstanding share options [line items]
Expected dividends	$ 0	$ 0
Bottom of range
Disclosure of range of exercise prices of outstanding share options [line items]
Risk-free interest rate	0.30%	0.30%
Expected volatility (range)	64.00%	63.00%
Expected life (range)	1 year 11 months 1 day	1 year 11 months 15 days
Top of range
Disclosure of range of exercise prices of outstanding share options [line items]
Risk-free interest rate	0.80%	1.00%
Expected volatility (range)	68.00%	70.00%
Expected life (range)	3 years 11 months 4 days	3 years 11 months 15 days

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- Definition

Option Life of Share Options Granted

+ References

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- Definition

The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2021-01-01
-Paragraph 47
-Subparagraph a
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_47_a_i&doctype=Standard
-URIDate 2021-03-24

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- Definition

The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2021-01-01
-Paragraph 47
-Subparagraph a
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_47_a_i&doctype=Standard
-URIDate 2021-03-24

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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- Definition

The amount of an expected dividend used to calculate the fair value of share options granted.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2021-01-01
-Paragraph 47
-Subparagraph a
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_47_a_i&doctype=Standard
-URIDate 2021-03-24

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