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Note 18 - Exploration and Evaluation Assets (Details Textual) - USD ($) $ in Thousands |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 16, 2020 | Nov. 24, 2020 | Nov. 19, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Jan. 01, 2019
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |
Decrease in exploration and evaluation assets from reallocation to assets held for sale | [1] |  |  |  | $ 500 |  |  |  |  |  |
Assets arising from exploration for and evaluation of mineral resources |  |  |  |  | 6,768 | $ 7,139 | [2] | $ 6,967 |  | $ 6,967 | [2]
Impairment loss recognised in profit or loss, exploration and evaluation assets | [1] |  |  |  | 2,930 |  |  |  |  |  |
Total non-current assets or disposal groups classified as held for sale or as held for distribution to owners |  |  |  |  | 500 |  | [2] |  |  | 296 | [2]
Cash flows from (used in) exploration for and evaluation of mineral resources, classified as investing activities |  |  |  |  | (2,759) | (172) | [3] |  | [3] |  |
Total trade and other current payables |  |  |  |  | 8,664 | 8,348 | [2] |  |  | 10,051 | [2]
Eagle Vulture, Mascot and Penzance [member] |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total non-current assets or disposal groups classified as held for sale or as held for distribution to owners |  |  |  |  | 500 |  |  |  |  |  |
Eagle Vulture, Mascot and Penzance [member] |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |
Decrease in exploration and evaluation assets from reallocation to assets held for sale | [1] |  |  |  | 500 |  |  |  |  |  |
Assets arising from exploration for and evaluation of mineral resources |  |  |  |  |  | 3,416 |  | 3,344 |  |  |
Impairment loss recognised in profit or loss, exploration and evaluation assets | [1] |  |  |  | 2,930 |  |  |  |  |  |
Eagle Vulture, Mascot and Penzance [member] | Gross carrying amount [member] |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |
Assets arising from exploration for and evaluation of mineral resources |  |  |  |  | 3,430 |  |  |  |  |  |
Glen Hume [Member] |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |
Decrease in exploration and evaluation assets from reallocation to assets held for sale | [1] |  |  |  |  |  |  |  |  |  |
Assets arising from exploration for and evaluation of mineral resources |  |  |  |  | 2,661 |  |  |  |  |  |
Impairment loss recognised in profit or loss, exploration and evaluation assets | [1] |  |  |  |  |  |  |  |  |  |
Period of option agreement (Month) |  |  |  | 1 year 90 days |  |  |  |  |  |  |
Cash flows from (used in) exploration for and evaluation of mineral resources, classified as investing activities |  |  | $ (2,500) |  |  |  |  |  |  |  |
Expected exploration and evaluation of mineral resources expenses |  |  | 1,000 |  |  |  |  |  |  |  |
Option agreement exercise expense |  |  | $ 2,500 |  |  |  |  |  |  |  |
Percentage of net smelter royalty |  |  | 1.00% |  |  |  |  |  |  |  |
Option agreement, net smelter royalty buy-out, first five years |  |  | $ 15,000 |  |  |  |  |  |  |  |
Option agreement, net smelter royalty buy-out, five to ten years |  |  | 10,000 |  |  |  |  |  |  |  |
Option agreement, net smelter royalty buy-out, after ten years |  |  | $ 5,000 |  |  |  |  |  |  |  |
Connemara North [Member] |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |
Decrease in exploration and evaluation assets from reallocation to assets held for sale | [1] |  |  |  |  |  |  |  |  |  |
Assets arising from exploration for and evaluation of mineral resources |  |  |  |  | 300 |  |  |  |  |  |
Impairment loss recognised in profit or loss, exploration and evaluation assets | [1] |  |  |  |  |  |  |  |  |  |
Period of option agreement (Month) |  | 1 year 180 days |  |  |  |  |  |  |  |  |
Option agreement exercise expense |  | $ 600 |  |  |  |  |  |  |  |  |
Percentage of net smelter royalty |  | 1.00% |  |  |  |  |  |  |  |  |
Total trade and other current payables |  | $ 300 |  |  |  |  |  |  |  |  |
Option agreement exercise expense within seven days of transfer of ownership |  | $ 4,400 |  |  |  |  |  |  |  |  |
[1] | Management determined the fair value of Eagle Vulture, Mascot and Penzance as the future sale price as agreed by independent parties in the sale contract that amounted to $500. The carrying amount of Eagle Vulture, Mascot and Penzance before the impairment was $3,430 and the write down resulted in an impairment expense of $2,930. The $500 carrying value was reallocated to Assets held for sale in December, 2020.
[2] | The Group voluntarily changed its disclosure policy for exploration and evaluation assets to be disclosed separately as Exploration and evaluation assets rather than as part of Property, plant and equipment; similarly lease liabilities were classified separately from trade and other payables (refer to note 4(b)(i) and 4(b)(ii)). The new disclosure policies were adopted from December, 2020 and have been applied retrospectively.
[3] | The Group voluntarily changed its disclosure policy for exploration and evaluation assets to be disclosed separately as Acquisition of exploration and evaluation assets rather than as part of Acquisition of property, plant and equipment (refer to note 4(b)(i)). The new disclosure policy was adopted from December 10, 2020 and has been applied retrospectively.

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