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Note 30 - Related Parties - Key Management Personnel and Entities (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Statement Line Items [Line Items]      
Key management salaries and bonuses $ 2,041 $ 2,033 $ 2,452
Cash-settled share-based expense* [1] 1,164 788 24
Total $ 3,205 $ 2,821 $ 2,476
[1] Amount inclusive of $311 of the cash settled share based payment that is classified as production costs.