Loss per share (Tables)

9 Months Ended

12 Months Ended

Jul. 31, 2021

Oct. 31, 2020

Basic and diluted earnings per share [abstract]

Summary of Weighted Average Number of Ordinary Shares

	Three months ended July 31,						Nine months ended July 31,
	2021			2020			2021			2020
Net loss	$	(6,897,318	)	$	(1,810,981	)	$	(21,590,783	)	$	(4,842,463	)
Weighted average number of ordinary shares		2,394,475			2,100,603			2,372,731			2,057,723
Basic and diluted loss per share	$	(2.88	)	$	(0.86	)	$	(9.10	)	$	(2.35	)

	2020			2019			2018
Net loss	$	(9,275,962	)	$	(4,100,782	)	$	(908,869	)
Weighted average number of ordinary shares		2,068,952			1,801,338			1,700,751
Basic and diluted loss per share	$	(4.48	)	$	(2.28	)	$	(0.53	)

Summary of Anti Dilutive Potential Ordinary Shares Excluded from Weighted Average Number of Ordinary Shares

The following potential common shares are anti-dilutive and are therefore excluded from the weighted average number of common shares for the purpose of diluted earnings per share:

	Three months ended July 31,				Nine months ended July 31,
	2021		2020		2021		2020
Stock options		135,086		133,500		135,086		133,500
Restricted share units		9,501		2,182		9,501		2,182
		144,587		135,682		144,587		135,682

The following potential ordinary shares are anti-dilutive and are therefore excluded from the weighted average number of ordinary shares for the purpose of diluted earnings per share:

	2020		2019		2018
Stock options		133,500		99,500		58,320
Convertible debt		—		13,436		13,436
Restricted share units		2,182		—		—
		135,682		112,936		71,756