Warrant liability (Narrative) (Details) - USD ($)	12 Months Ended
Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2022
Disclosure Of Warrant Liability [Abstract]
Cash share issuance costs	$ 13,326	$ 0	$ 0

Represents the amount of cash share issuance costs.

No definition available.

Name:	mmtif_CashShareIssuanceCosts
Namespace Prefix:	mmtif_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration