Patents (Tables)

12 Months Ended

Oct. 31, 2020

Intangible assets and goodwill [abstract]

Disclosure of detailed information about patents [Table Text Block]

		November 1,							November 1,				October 31,
		2018		Additions		Impairment			2019		Additions		2020
Cost	$	904,431	$	—	$	(223,143	)	$	681,288	$	—	$	681,288
Accumulated amortization		508,326		152,962		—			661,288		8,123		669,411
Net book value	$	396,105						$	20,000			$	11,877