Income taxes (Tables)

12 Months Ended

Oct. 31, 2019

Notes to Financial Statements [Abstract]

Disclosure of unused tax losses [Table Text Block]

		Canada		Other foreign		Total
2026	$	1,824,942		-	$	1,824,942
2027		1,534,633		-		1,534,633
2028				-		-
2029		1,572,795		452,762		2,025,557
2030		2,122,111		1,880,897		4,003,008
2031		1,278,506		18,526		1,297,032
2032		1,416,917		325,793		1,742,710
2033		1,717,443		157,463		1,874,906
2034		2,484,557		679,089		3,163,646
2035		2,807,765		570,901		3,378,666
2036		3,295,071		441,019		3,736,090
2037		2,637,800		232,719		2,870,519
2038		1,783,250		-		1,783,250
2039		1,224,688		5,254		1,229,942
	$	25,700,478	$	4,764,423	$	30,464,901

Disclosure of deferred taxes [Table Text Block]

		2019			2018			2017
Non-capital losses and other	$	8,073,286		$	7,698,859		$	7,277,434
Capital losses		175,090			175,090			350,180
Property, equipment, patents and deferred costs		1,668,632			1,567,228			1,598,394
	$	9,917,008		$	9,441,177		$	9,226,008
Deferred tax asset not recognized		(9,917,008	)		(9,441,177	)		(9,226,008	)
	$	-		$	-		$	-

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

		2019			2018			2017
Loss before income taxes	$	(2,832,864	)	$	(2,362,239	)	$	(4,346,200	)
Statutory tax rate		26.50%			26.50%			26.50%
Expected income tax recovery	$	(750,709	)	$	(625,993	)	$	(1,151,743	)
Non-deductible expenses and other items		270,610			182,056			413,499
Effect of exchange rate on deferred tax assets carried forward		4,269			225,846			424,023
Effect of higher tax rates in foreign jurisdiction		-			-			163,651
Change in deferred tax assets not recognized		475,830			218,091			150,570
	$	-		$	-		$	-