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Note 11 - Impairment Loss on Trade Receivables - Components of Other Expenses (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Statement Line Items [Line Items]      
Impairment - 2017 royalty rebate $ 0 $ 0 $ 181 [1]
[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.