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Note 32 - Cash Flow Information - Non-cash Items and Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Statement Line Items [Line Items]      
Operating profit $ 40,735 $ 60,889 $ 21,421
Impairment of property, plant and equipment 144 208
Impairment of exploration and evaluation assets 2,930
Profit on sale of subsidiary (5,409)
Unrealised foreign exchange gains (note 11) (8,367) (31,307) (243)
Cash-settled share-based expense (note 30.1) 1,413 689 228
Cash-settled share-based expense included in production costs (note 9) 634 107 43
Settlement of cash-settled share-based expense (1) (1,384)
Equity-settled share-based expense 14
Site restoration 30
Depreciation 4,628 4,434 4,071
Allowance for obsolete inventory 15
Fair value loss/ (gain) on derivative assets (note 23) 266 (102)
Disposal of property, plant and equipment 63
Derecognition of property, plant and equipment 182
Net cash used for assets and liabilities held for sale (2)
Cash generated by operations before working capital changes 42,420 28,124 25,785
Inventories (5,707) (1,655) (277)
Prepayments 816 (2,099) (62)
Trade and other receivables 539 393 (1,916)
Trade and other payables (101) (878) (2,411)
Cash generated by operations $ 37,967 $ 23,885 [1] $ 21,119 [1]
[1] 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.