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Note 14 - Tax Expense - Income Tax Components (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Tax recognised in profit or loss |  |  |
Current tax | $ 4,995 | $ 3,106 | $ (197)
Income tax– current year | 3,702 | 2,414 | 506
Income tax – Prior year under provision | 71 | 49 | (1,636)
Withholding tax expense | 1,222 | 643 | 933
Deferred tax expense | 3,696 | 4,611 | 2,567
Origination and reversal of temporary differences | 3,696 | 4,611 | 2,567
Tax expense – recognised in profit or loss | 8,691 | 7,717 | 2,370
Tax recognised in other comprehensive income |  |  |
Income tax - current year |  |  | (199)
Tax expense | $ 8,691 | $ 7,717 | $ 2,171

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