Stock options (Schedule of detailed information about options, valuation assumptions) (Details)	12 Months Ended
Oct. 31, 2022 USD ($) year $ / shares	Oct. 31, 2021 USD ($) year $ / shares
Disclosure Of Information About Stock Options [Line Items]
Share price at grant date		$ 0.05
Exercise price	$ 0.07
Risk free interest rate		0.75%
Expected life of options in years \| year		5
Expected dividend yield	0.00%	0.00%
Forfeiture rate	0.00%	0.00%
Minimum [Member]
Disclosure Of Information About Stock Options [Line Items]
Share price at grant date	$ 0.03
Exercise price		$ 0.05
Volatility factor	212.00%	148.00%
Risk free interest rate	0.97%
Expected life of options in years \| year	1
Weighted average Black Scholes value at grant date \| $	$ 0.02	$ 0.05
Maximum [Member]
Disclosure Of Information About Stock Options [Line Items]
Share price at grant date	$ 0.05
Exercise price		$ 0.07
Volatility factor	272.00%	180.00%
Risk free interest rate	4.33%
Expected life of options in years \| year	2
Weighted average Black Scholes value at grant date \| $	$ 0.03	$ 0.06

The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2022-03-24
-Paragraph 47
-Subparagraph a
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2022-en-r&anchor=para_47_a_i&doctype=Standard
-URIDate 2022-03-24

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- Definition

The option life of share options granted.

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- Definition

The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]]

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- Definition

The exercise price of share options granted.

+ References

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- Definition

The percentage of an expected dividend used to calculate the fair value of share options granted.

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- Definition

The weighted average fair value of share options granted during the period at the measurement date. [Refer: Weighted average [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2022-03-24
-Paragraph 47
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2022-en-r&anchor=para_47_a&doctype=Standard
-URIDate 2022-03-24

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- Definition

The weighted average share price used as input to the option pricing model to calculate the fair value of share options granted. [Refer: Option pricing model [member]; Weighted average [member]]

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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- Definition

Forfeiture rate

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