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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.

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