XML 51 R41.htm IDEA: XBRL DOCUMENT
v3.24.2.u1

Note 9 - Segmented Information - Geographic Information (Details) - CAD ($) | Jun. 30, 2024 | Mar. 31, 2024
--- | --- | ---
Statement Line Items [Line Items] |  |
Exploration and evaluation assets | $ 15,742,212 | $ 15,094,413
Canada 1 [member] |  |
Statement Line Items [Line Items] |  |
Exploration and evaluation assets | 13,975,934 | 13,336,387
United States 1 [member] |  |
Statement Line Items [Line Items] |  |
Exploration and evaluation assets | $ 1,766,278 | $ 1,758,026

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

X
- References No definition available. + Details
Name: | ifrs-full_AssetsArisingFromExplorationForAndEvaluationOfMineralResources
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=fmst_Canada1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=fmst_UnitedStates1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |