The number of share options outstanding in a share-based payment arrangement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2021-01-01
-Paragraph 45
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45_d&doctype=Standard
-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2021-01-01
-Paragraph 45
-Subparagraph b
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45_b_i&doctype=Standard
-URIDate 2021-03-24

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2021-01-01
-Paragraph 45
-Subparagraph b
-Clause vi
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45_b_vi&doctype=Standard
-URIDate 2021-03-24

+ Details

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

- Definition

The weighted average exercise price of share options outstanding in a share-based payment arrangement. [Refer: Weighted average [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2021-01-01
-Paragraph 45
-Subparagraph b
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45_b_i&doctype=Standard
-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2021-01-01
-Paragraph 45
-Subparagraph b
-Clause vi
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45_b_vi&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019
Namespace Prefix:	ifrs-full_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted average remaining contractual life of outstanding share options. [Refer: Weighted average [member]]

+ References

+ Details

Name:	ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:durationItemType
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 domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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

- Definition

It represents information about expiry date of stock options outstanding.

+ References

No definition available.

+ Details

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

- Details

Name:	mmtif_StockOptionsByIssuanceDateAxis=mmtif_JuneTwentyNineTwoZeroOneEightMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	mmtif_StockOptionsByIssuanceDateAxis=mmtif_NovemberOneThreeTwoZeroTwoZeroMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	mmtif_StockOptionsByIssuanceDateAxis=mmtif_Issued1OctoberEightTwoZeroTwoOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	mmtif_StockOptionsByIssuanceDateAxis=mmtif_Issued2OctoberEightTwoZeroTwoOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	mmtif_StockOptionsByIssuanceDateAxis=mmtif_Issued3OctoberEightTwoZeroTwoOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Stock options (Schedule of detailed information related to number and weighted average remaining contractual life of outstanding share options) (Details)	12 Months Ended
	Oct. 31, 2021 share $ / shares	Oct. 31, 2020 share $ / shares	Oct. 31, 2019 share $ / shares
Disclosure Of Information About Stock Options [Line Items]
Number of stock options outstanding \| share	11,700,000	2,200,000	5,730,000
Exercise price \| $ / shares	$ 0.06	$ 0.10	$ 0.25
Weighted average remaining contractual life of outstanding share options	3 years 1 month 6 days
June 29, 2018 [Member]
Disclosure Of Information About Stock Options [Line Items]
Number of stock options outstanding \| share	2,200,000
Exercise price \| $ / shares	$ 0.10
Weighted average remaining contractual life of outstanding share options	1 year 8 months 12 days
Expiry date of stock options outstanding	June 29, 2023
November 13, 2020 [Member]
Disclosure Of Information About Stock Options [Line Items]
Number of stock options outstanding \| share	6,500,000
Exercise price \| $ / shares	$ 0.05
Weighted average remaining contractual life of outstanding share options	4 years
Expiry date of stock options outstanding	November 13, 2025
October 8, 2021 [Member]
Disclosure Of Information About Stock Options [Line Items]
Number of stock options outstanding \| share	1,000,000
Exercise price \| $ / shares	$ 0.07
Weighted average remaining contractual life of outstanding share options	4 years 10 months 24 days
Expiry date of stock options outstanding	October 8, 2026
October 8, 2021 [Member]
Disclosure Of Information About Stock Options [Line Items]
Number of stock options outstanding \| share	1,000,000
Exercise price \| $ / shares	$ 0.07
Weighted average remaining contractual life of outstanding share options	10 months 24 days
Expiry date of stock options outstanding	October 8, 2022
October 8, 2021 [Member]
Disclosure Of Information About Stock Options [Line Items]
Number of stock options outstanding \| share	1,000,000
Exercise price \| $ / shares	$ 0.07
Weighted average remaining contractual life of outstanding share options	4 months 24 days
Expiry date of stock options outstanding	April 8, 2022