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Share capital - Stock options plans and changes (Details)	12 Months Ended
	Nov. 30, 2021 $ / shares shares	Nov. 30, 2021 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance - end of period, number of options | shares	10,539,324	10,539,324
Balance - end of period, weighted average exercise price | $ / shares	$ 1.99
Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance - beginning of the year, number of options | shares	8,647,500	8,647,500
Balance - beginning of the year, weighted average exercise price | $ / shares		$ 1.87
Number of options, Granted | shares	3,374,150	3,374,150
Weighted average exercise price, Granted | $ / shares		$ 1.97
Number of options, Exercised | shares	(1,330,326)	(1,330,326)
Weighted average exercise price, Exercised | $ / shares		$ 1.14
Number of options, Cancelled | shares	(140,666)	(140,666)
Weighted average exercise price, Cancelled | $ / shares		$ 2.38
Balance - end of period, number of options | shares	10,539,324	10,539,324
Balance - end of period, weighted average exercise price | $ / shares		$ 1.99

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Net number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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