Income taxes (Tables)

12 Months Ended

Oct. 31, 2025

Notes to Financial Statements [Abstract]

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

		2025			2024			2023
Loss before income taxes	$	(668,749	)	$	(3,062,798	)	$	(2,691,670	)
Statutory tax rate		26.5%			26.5%			26.5%
Expected income tax recovery	$	(177,218	)	$	(811,641	)	$	(713,293	)
Accretion expense and loss (gain) on convertible debentures and derivative liabilities		(285,390	)		224,771			283,688
Stock-based compensation		-			1,727			57,761
Non-deductible (non-taxable) expenses and financing costs		8,746			239,387			(13,660	)
Effect of changes in exchange rates		61,744			30,403			74,714
Other		9,382			-			-
Change in deferred tax assets not recognized		382,736			315,353			310,790
	$	-		$	-		$	-

Disclosure of deferred taxes [Table Text Block]

		2025			2024			2023
Non-capital losses	$	9,579,099		$	9,163,035		$	8,833,940
Capital losses		158,010			159,162			159,671
Property, equipment, patents and deferred costs		1,559,553			1,591,255			1,605,743
	$	11,296,662		$	10,913,452		$	10,599,354
Deferred tax asset not recognized		(11,296,662	)		(10,913,452	)		(10,599,354	)
	$	-		$	-		$	-

Disclosure of unused tax losses [Table Text Block]

		Canada		United States		Total
2026	$	1,713,894	$	-	$	1,713,894
2027		1,441,250		-		1,441,250
2028		-		-		-
2029		1,477,090		143,721		1,620,811
2030		1,992,980		1,880,897		3,873,877
2031		1,200,708		18,526		1,219,234
2032		1,330,697		325,793		1,656,490
2033		1,612,936		157,463		1,770,399
2034		2,333,371		679,089		3,012,460
2035		2,636,912		570,901		3,207,813
2036		3,094,565		441,019		3,535,584
2037		2,477,289		232,714		2,710,003
2038		1,674,739		317		1,675,056
2039		1,498,126		-		1,498,126
2040		504,648		-		504,648
2041		874,389		-		874,389
2042		1,241,057		-		1,241,057
2043		1,474,043		-		1,474,043
2044		1,329,031		-		1,329,031
2045		1,789,382		-		1,789,382
	$	31,697,105	$	4,450,440	$	36,147,545