XML 122 R64.htm IDEA: XBRL DOCUMENT
v3.20.1

Interest and Finance (Costs) Income, Net (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Interest and Finance (Costs) Income, Net [Abstract] |
Schedule of interest and finance (costs) income, net |
|  | Years ended December 31,
|  | 2019 |  | 2018
Interest income |  | $ | 1,838 |  | $ | 3,429
Interest expense |  |  | (857) |  |  | (1,092)
Bank stand-by and commitment fees |  |  | (415) |  |  | (470)
Accretion expense |  |  | (590) |  |  | (830)
Loss on debt restructuring |  |  | - |  |  | (653)
|  | $ | (24) |  | $ | 384

X
- Definition The tabular disclosure of finance income (cost). + References No definition available. + Details
Name: | fsm_DisclosureOfFinanceIncomeCostTableTextBlock
Namespace Prefix: | fsm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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