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Note 17 - Tax Expense - Income Tax Components (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Tax recognised in profit or loss |  |  |  |  |
Current tax | $ 7,311 | $ 3,783 |  | $ 4,995 |
Income tax– current year | 6,802 | 2,523 |  | 3,702 |
Income tax – Prior year under provision | 29 | 1,075 |  | 71 |
Withholding tax expense – current year | 480 | 580 |  | 1,222 |
Withholding tax expense – Prior year over provision |  | (395) |  |  |
Deferred tax expense | 2,979 | 3,662 |  | 3,696 |
Origination and reversal of temporary differences | 2,979 | 3,662 |  | 3,696 |
Tax expense – recognised in profit or loss | 10,290 | 7,445 | [1] | 8,691 | [1]
Tax expense | $ 10,290 | $ 7,445 |  | $ 8,691 |
[1] | The Group initially applied IFRS 16 on January 1, 2019, using the modified retrospective approach. Under this approach, comparative information is not restated. There was no cumulative effect of initially applying IFRS 16 to recognise in retained earnings at the date of initial application.

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