Convertible debentures (Schedule of detailed information about convertible debenture) (Details) - USD ($)	Oct. 31, 2021	Oct. 31, 2020
Convertible Debentures [Line Items]
Convertible debentures	$ 2,452,402	$ 3,081,518
Derivative liabilities	787,081	533,562
Equity component of convertible debentures	14,004	23,952
USD denominated debentures with equity components and CDN denominated debentures with embedded derivatives [Member]
Convertible Debentures [Line Items]
Convertible debentures	2,248,108	2,881,719
Derivative liabilities	557,322	197,270
Equity component of convertible debentures	14,004	23,952
USD denominated debentures with embedded derivatives [Member]
Convertible Debentures [Line Items]
Convertible debentures	204,294	199,799
Derivative liabilities	229,759	336,292
Equity component of convertible debentures	$ 0	$ 0

The amount of current derivative financial liabilities. [Refer: Derivative financial liabilities]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_CurrentDerivativeFinancialLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

A component of equity representing components of convertible instruments classified as equity.

+ References

+ Details

Name:	ifrs-full_ReserveOfEquityComponentOfConvertibleInstruments
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of current borrowings. [Refer: Borrowings]

+ References

+ Details

Name:	ifrs-full_ShorttermBorrowings
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

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

- Details

Name:	mmtif_ConvertibleDebenturesAxis=mmtif_UsdDenominatedDebenturesWithEquityComponentsAndCdnDenominatedDebenturesWithEmbeddedDerivativesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	mmtif_ConvertibleDebenturesAxis=mmtif_UsdDenominatedDebenturesWithEmbeddedDerivativesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: