XML 80 R53.htm IDEA: XBRL DOCUMENT
v3.25.1

OTHER NON-CURRENT LIABILITIES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
OTHER NON-CURRENT LIABILITIES |
Summary of other non-current liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
As at December 31, | Note |  | ​ | 2024 $ |  | ​ | 2023 $
Restricted share units | 16(b) | ​ | ​ | 3,944 | ​ | ​ | 2,648
Other | ​ | ​ | ​ | 146 | ​ | ​ | 7,325
Total other non-current liabilities | ​ | ​ | ​ | 4,090 | ​ | ​ | 9,973

X
- Definition Disclosure of Other Liabilities [abstract]. + References No definition available. + Details
Name: | fsm_DisclosureOfOtherLiabilitiesAbstract
Namespace Prefix: | fsm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of other liabilities. + References No definition available. + Details
Name: | fsm_DisclosureOfOtherLiabilitiesTextBlock
Namespace Prefix: | fsm_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration