Warrants (Schedule of detailed information about warrants outstanding and exercisable) (Details) - Broker Warrants [Member]	12 Months Ended
Oct. 31, 2025 share $ / shares	Oct. 31, 2025 share $ / shares	Oct. 31, 2024 share $ / shares	Oct. 31, 2023 share
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Other Equity Instruments [Line Items]
Number of warrants	63,000	63,000	247,000	0
Exercise price \| (per share)	$ 0.095	$ 0.07	$ 0.04
Remaining contractual life	1 month 20 days	1 month 20 days
Expiry Date December 22,2025 [Member]
Disclosure Of Number And Weighted Average Remaining Contractual Life Of Outstanding Other Equity Instruments [Line Items]
Number of warrants	63,000	63,000
Exercise price \| (per share)	$ 0.095	$ 0.07
Remaining contractual life	1 month 20 days	1 month 20 days

The number of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 2
-IssueDate 2025-01-01
-Paragraph 45
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_45&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted average exercise price of other equity instruments (ie other than share options) granted in a share-based payment arrangement. [Refer: Weighted average [member]]

+ References

+ Details

Name:	ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement2019
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	mmtif_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingOtherEquityInstrumentsLineItems
Namespace Prefix:	mmtif_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The weighted average remaining contractual life of outstanding other equity instruments.

+ References

No definition available.

+ Details

Name:	mmtif_WeightedAverageRemainingContractualLifeOfOutstandingOtherEquityInstruments
Namespace Prefix:	mmtif_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	ifrs-full_ComponentsOfEquityAxis=mmtif_BrokerWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	mmtif_RangesOfExercisePricesForOutstandingOtherEquityInstrumentsAxis=mmtif_ExpiryDateDecember222025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: