Long-term loan (Narrative) (Details)	1 Months Ended
Apr. 15, 2020 CAD ($)	Oct. 31, 2020 USD ($)	Apr. 15, 2020 USD ($)	Oct. 31, 2019 USD ($)
Disclosure Of Detailed Information About Loan From Government [Line Items]
Long-term loan	$ 40,000	$ 30,269	$ 30,269	$ 0
Canada Emergency Business Account ("CEBA") program [Member]
Disclosure Of Detailed Information About Loan From Government [Line Items]
Long-term loan	$ 40,000		30,269
Maturity date	December 31, 2025
Amount of loan forgiveness if repaying balance loan before December 31, 2022	$ 10,000		$ 7,567
Term loan interest rate per annum	5.00%		5.00%

The interest rate on borrowings. [Refer: Borrowings]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-IssueDate 2019-01-01
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-URIDate 2019-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The maturity of borrowings. [Refer: Borrowings]

+ References

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The non-current portion of non-current borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard
-URIDate 2019-03-27

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Information about the amount of loan forgiveness.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

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

- Details

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Namespace Prefix:
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Balance Type:
Period Type: