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Note 18 - Exploration and Evaluation Assets - Exploration and Evaluation Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Statement Line Items [Line Items]    
Balance $ 7,139 [1] $ 6,967
- Consumables and drilling 189 3
- Contractor   93
- Labour 46 40
- Power 24 36
- Option payments 2,800  
Reallocate to assets held for sale (note 21.1) ~ [2] (500)  
Impairment ~ [2] (2,930)  
Balance 6,768 7,139 [1]
Glen Hume [Member]    
Statement Line Items [Line Items]    
Balance
- Consumables and drilling 161
- Contractor  
- Labour
- Power
- Option payments 2,500  
Reallocate to assets held for sale (note 21.1) ~ [2]  
Impairment ~ [2]  
Balance 2,661
Connemara North [Member]    
Statement Line Items [Line Items]    
Balance
- Consumables and drilling
- Contractor  
- Labour
- Power
- Option payments 300  
Reallocate to assets held for sale (note 21.1) ~ [2]  
Impairment ~ [2]  
Balance 300
GG [member]    
Statement Line Items [Line Items]    
Balance 3,441 3,347
- Consumables and drilling 28 6
- Contractor   36
- Labour 35 32
- Power 19 20
- Option payments  
Reallocate to assets held for sale (note 21.1) ~ [2]  
Impairment ~ [2]  
Balance 3,523 3,441
Eagle Vulture, Mascot and Penzance [member]    
Statement Line Items [Line Items]    
Balance 3,416 3,344
- Consumables and drilling (3)
- Contractor   57
- Labour 11 8
- Power 3 10
- Option payments  
Reallocate to assets held for sale (note 21.1) ~ [2] (500)  
Impairment ~ [2] (2,930)  
Balance 3,416
Sabiwa [member]    
Statement Line Items [Line Items]    
Balance 282 276
- Consumables and drilling
- Contractor  
- Labour
- Power 2 6
- Option payments  
Reallocate to assets held for sale (note 21.1) ~ [2]  
Impairment ~ [2]  
Balance $ 284 $ 282
[1] 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.
[2] 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.