Income taxes (Tables)

12 Months Ended

Oct. 31, 2023

Notes to Financial Statements [Abstract]

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

		2023			2022			2021
Loss before income taxes	$	(2,691,670	)	$	(2,287,095	)	$	(1,012,978	)
		26.5%			26.5%			26.5%
Expected income tax recovery	$	(713,293	)	$	(606,080	)	$	(268,439	)
Accretion expense and loss (gain) on convertible debentures and derivative liabilities		283,688			269,531			(97,480	)
Stock-based compensation		57,761			10,992			95,412
Non-deductible (non-taxable) expenses and other items		(13,660	)		(3,780	)		82,530
Effect of changes in exchange rates		74,714			940,577			(644,649	)
Change in deferred tax assets not recognized		310,790			(611,240	)		832,626
	$	-		$	-		$	-

Disclosure of deferred taxes [Table Text Block]

		2023			2022			2021
Non-capital losses	$	8,833,940		$	8,485,255		$	8,924,982
		159,671			162,275			178,808
Property, equipment, patents and deferred costs		1,605,743			1,639,306			1,794,285
	$	10,599,354		$	10,286,836		$	10,898,075
Deferred tax asset not recognized		(10,599,354	)		(10,286,836	)		(10,898,075	)
	$	-		$	-		$	-

Disclosure of unused tax losses [Table Text Block]

		Canada		United States		Total
2026	$	1,731,988	$	-	$	1,731,988
2027		1,456,466		-		1,456,466
2028		-		-		-
2029		1,492,685		143,721		1,636,406
2030		2,014,021		1,880,897		3,894,918
2031		1,213,385		18,526		1,231,911
2032		1,344,746		325,793		1,670,539
2033		1,629,964		157,463		1,787,427
2034		2,358,006		679,089		3,037,095
2035		2,664,751		570,901		3,235,652
2036		3,127,236		441,019		3,568,255
2037		2,503,443		232,714		2,736,157
2038		1,692,420		317		1,692,737
2039		1,513,943		-		1,513,943
2040		509,976		-		509,976
2041		883,620		-		883,620
2042		1,254,159		-		1,254,159
2043		1,494,374		-		1,494,374
	$	28,885,183	$	4,450,440	$	33,335,623