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Note 26 - Cash Flow Information - Non-cash Items and Information (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jun. 23, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Statement Line Items [Line Items] |  |  |  |
Profit for the year |  | $ 11,896 | $ 11,085 | $ 5,590
Tax expense |  | 8,691 | 7,717 | 2,370
Net finance cost |  | 31 | 176 | 535
Loss on sale of Property, plant and equipment |  | 2 | 44 |
Impairment of Property, plant and equipment |  | 12 | 20 | 33
Foreign exchange gains on cash held |  | 121 | (105) | (2,865)
Site restoration |  | 36 | 32 |
Cash-settled share-based payment expense |  | 1,208 | 788 |
Equity-settled share-based payment expense | $ 806 | 835 | 170 | 24
Depreciation |  | 3,763 | 3,491 | 3,322
Allowance for obsolete stock |  | 32 | 862 | 46
Provision for impairment - royalty rebate (note 17) |  | 181 |  |
Cash generated by operations before working capital changes |  | 26,808 | 24,110 | 9,055
Inventories |  | (1,975) | (1,990) | 375
Prepayments |  | 82 | (99) | (321)
Trade and other receivables |  | (1,437) | 555 | (1,472)
Trade and other payables |  | 5,407 | 3,095 | 1,186
Cash flows from operating activities |  | $ 28,885 | $ 25,671 | $ 8,823

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