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Note 8 - Loans Payable (Details Textual) | Mar. 31, 2021 CAD ($)
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Canada Emergency Business Account loan [member] |
Statement Line Items [Line Items] |
Total borrowings | $ 40,000

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- References No definition available. + Details
Name: | fmst_Statement1LineItems
Namespace Prefix: | fmst_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of outstanding funds that the entity is obligated to repay. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_Borrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | ifrs-full_BorrowingsByNameAxis=fmst_CanadaEmergencyBusinessAccountLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |