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Note 21 - Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2024
Statement Line Items [Line Items] |
Disclosure of changes in non-cash working capital [text block] |
|  |  |  |  |  | Years ended December 31 |
|  | 2024 |  |  | 2023 |  |  | 2022 |
Accounts receivable |  | $ | 321 |  |  | $ | (5 | ) |  | $ | (47 | )
Prepaid expenses and deposits |  |  | 104 |  |  |  | (59 | ) |  |  | (94 | )
Accounts payable and accrued liabilities |  |  | (15 | ) |  |  | (120 | ) |  |  | (762 | )
Changes in non-cash working capital |  | $ | 410 |  |  | $ | (184 | ) |  | $ | (903 | )
Disclosure of additional cash flows [text block] |
|  |  |  |  |  | Years ended December 31 |
|  | 2024 |  |  | 2023 |  |  | 2022 |
Income taxes refunded |  | $ | (193 | ) |  | $ | (307 | ) |  | $ | (187 | )
Income taxes paid |  |  | - |  |  |  | 18 |  |  |  | - |
Income tax expense (recovery) |  | $ | (193 | ) |  | $ | (289 | ) |  | $ | (187 | )

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- Definition Schedule for entire disclosure for additional cash flows. + References No definition available. + Details
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Data Type: | dtr-types:textBlockItemType
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- Definition Schedule disclosing information related to non-cash working capital. + References No definition available. + Details
Name: | fury_DisclosureOfSChangesInNoncashWorkingCapitalTextBlock
Namespace Prefix: | fury_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Data Type: | xbrli:stringItemType
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Period Type: | duration