Income taxes (Tables)

12 Months Ended

Oct. 31, 2022

Notes to Financial Statements [Abstract]

Disclosure of unused tax losses [Table Text Block]

		Canada		United States		Total
2026	$	1,743,280	$	-	$	1,743,280
2027		1,465,962		-		1,465,962
2028		-		-		-
2029		1,502,416		143,721		1,646,137
2030		2,027,152		1,880,897		3,908,049
2031		1,221,296		18,526		1,239,822
2032		1,353,513		325,793		1,679,306
2033		1,640,591		157,463		1,798,054
2034		2,373,379		679,089		3,052,468
2035		2,682,124		570,901		3,253,025
2036		3,147,625		441,019		3,588,644
2037		2,519,765		232,714		2,752,479
2038		1,703,454		317		1,703,771
2039		1,523,813		-		1,523,813
2040		513,301		-		513,301
2041		889,381		-		889,381
2042		1,262,336		-		1,262,336
	$	27,569,388	$	4,450,440	$	32,019,828

Disclosure of deferred taxes [Table Text Block]

		2022			2021			2020
Non-capital losses and other	$	8,485,255		$	8,924,982		$	8,232,346
Capital losses		162,275			178,808			166,316
Property, equipment, patents and deferred costs		1,639,306			1,794,285			1,666,788
	$	10,286,836		$	10,898,075		$	10,065,450
Deferred tax asset not recognized		(10,286,836	)		(10,898,075	)		(10,065,450	)
	$	-		$	-		$	-

Disclosure of detailed information about effective income tax expense (recovery) [Table Text Block]

		2022			2021			2020
Loss before income taxes	$	(2,287,095	)	$	(1,012,987	)	$	(1,245,393	)
Statutory tax rate		26.5%			26.5%			26.5%
Expected income tax recovery	$	(606,080	)	$	(268,439	)	$	(330,029	)
Accretion expense and loss (gain) on convertible debentures and derivative liabilities		269,531			(97,480	)		-
Stock-based compensation		10,992			95,412			-
Non-deductible (non-taxable) expenses and other items		(3,780	)		82,530			143,550
Effect of exchange rate on deferred tax assets carried forward and other		940,577			(644,649	)		38,037
Change in deferred tax assets not recognized		(611,240	)		832,626			148,442
	$	-		$	-		$	-