Income taxes (Tables)

12 Months Ended

Oct. 31, 2021

Notes to Financial Statements [Abstract]

Disclosure of unused tax losses [Table Text Block]

		Canada		Other foreign		Total
2026	$	1,939,567	$	-	$	1,939,567
2027		1,631,024		-		1,631,024
2028		-		-		-
2029		1,671,583		143,221		1,814,804
2030		2,255,401		1,880,897		4,136,298
2031		1,358,809		18,526		1,377,335
2032		1,505,914		325,793		1,831,707
2033		1,825,316		157,463		1,982,779
2034		2,640,613		679,089		3,319,702
2035		2,984,122		570,901		3,555,023
2036		3,502,035		441,019		3,943,054
2037		2,803,481		232,719		3,036,200
2038		1,895,257		317		1,895,574
2039		1,695,389		-		1,695,389
2040		531,199		-		531,199
2041		989,523		-		989,523
	$	29,229,232	$	4,449,945	$	33,679,177

Disclosure of deferred taxes [Table Text Block]

		2021			2020			2019
Non-capital losses and other	$	8,924,982		$	8,232,346		$	8,073,286
Capital losses		178,808			166,316			175,090
Property, equipment, patents and deferred costs		1,794,285			1,666,788			1,668,632
	$	10,898,075		$	10,065,450		$	9,917,008
Deferred tax asset not recognized		(10,898,075	)		(10,065,450	)		(9,917,008	)
	$	-		$	-		$	-

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

		2021			2020			2019
Loss before income taxes	$	(1,012,978	)	$	(1,245,393	)	$	(2,832,864	)
Statutory tax rate		26.50%			26.50%			26.50%
Expected income tax recovery	$	(268,439	)	$	(330,029	)	$	(750,709	)
Non-deductible expenses and other items		80,462			143,550			270,610
Effect of exchange rate on deferred tax assets carried forward and other		(644,649	)		38,037			4,269
Change in deferred tax assets not recognized		832,626			148,442			475,830
	$	-		$	-		$	-