Share capital (Tables)

9 Months Ended

12 Months Ended

Jul. 31, 2021

Oct. 31, 2020

Disclosure Of Number And Weighted Average Exercise Prices Of Share Options [line items]

Summary of Detailed Information About Stock Options Outstanding

A summary of outstanding stock options is as follows:

	Number of stock options		Exercise price
			$
Expiration dates
September 11, 2022		10,000		0.65
April 10, 2023		20,000		0.65
April 10, 2023		6,656		14.45
April 1, 2024		8,500		14.45
July 17, 2024		31,680		14.45
December 16, 2029		2,500		42.75
April 21, 2030		12,000		42.75
July 19, 2030		12,000		42.75
November 30, 2030		16,000		85.94
February 11, 2031		15,750		85.94
		135,086

A summary of outstanding stock options is as follows:

	Number of stock options		Exercise price
			$
Expiration dates
September 11, 2022		30,000		0.61
April 10, 2023		20,000		0.61
April 10, 2023		8,320		13.54
April 1, 2024		8,500		13.54
July 17, 2024		33,180		13.54

	Number of stock options		Exercise price
			$
December 16, 2029		2,500		40.05
April 21, 2030		16,500		40.05
July 19, 2030		14,500		40.05
		133,500

Summary of Detailed Information About Assumptions Used in Stock Option Pricing Model

The assumptions used in the stock option pricing model were as follows:

Risk free interest rate	0.46	%
Expected life of options	10 years
Expected dividend yield	0.0	%
Expected stock price volatility	65	%
Expected forfeiture rate	0.0	%

The assumptions used in the stock option pricing model were as follows:

Risk free interest rate	0.35 – 0.45%
Expected life of options	10 years
Expected dividend yield	0.0%
Expected stock price volatility	65%
Expected forfeiture rate	0.0%

Long Term Incentive Plan [member]

Disclosure Of Number And Weighted Average Exercise Prices Of Share Options [line items]

Summary of Detailed Information About Stock Option Activity

A summary of activity under the Plan and the LTIP is as follows:

	Number of stock options			Weighted average exercise price per stock option
Balance – October 31, 2020		133,500			15.35
Granted		31,750			85.29
Exercised		(25,664	)		6.59
Forfeited		(4,500	)		42.43
Balance – July 31, 2021		135,086			33.74

A summary of activity under the Plan and the LTIP is as follows:

	Number of stock options		Weighted average exercise price per stock option
			$
Balance – October 31, 2017		30,000		0.63
Granted		28,320		4.56
Balance – October 31, 2018		58,320		2.49
Granted		41,680		13.57
Balance – October 31, 2019		100,000		7.14
Granted		33,500		39.66
Balance – October 31, 2020		133,500		15.35