Share capital - Stock options plans and changes (Details)	9 Months Ended
Aug. 31, 2019 $ / shares shares	Aug. 31, 2019 $ / shares shares	Aug. 31, 2018 $ / shares	Aug. 31, 2018 $ / shares
Weighted average exercise price, Granted	$ 2.96		$ 1.15
Weighted average exercise price, Exercised		$ 1.08		$ 0.43
Balance - End of Period, Number of stock options \| shares	11,042,502	11,042,502
Balance - End of Period, Weighted average exercise price		$ 0.96
Stock option [Member]
Balance - beginning of the year, Number of stock Options \| shares	8,821,434	8,821,434
Balance - beginning of the year, Weighted average exercise price		$ 0.60
Number of options, Granted \| shares	2,527,500	2,527,500
Weighted average exercise price, Granted		$ 2.22
Number of options, Exercised \| shares	(306,432)	(306,432)
Weighted average exercise price, Exercised		$ 0.84
Balance - End of Period, Number of stock options \| shares	11,042,502	11,042,502
Balance - End of Period, Weighted average exercise price		$ 0.97

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.

+ References

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-Name Accounting Standards Codification
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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

+ References

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

No definition available.

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Number of share options (or share units) exercised during the current period.

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