Note 9 - Capital Risk Management (Details Textual) $ in Thousands	12 Months Ended
Dec. 31, 2018 USD ($)
Statement Line Items [Line Items]
Dividends paid, ordinary shares	$ 0
Total non-current liabilities	0
Working capital	$ 129,316

The amount of liabilities that do not meet the definition of current liabilities. [Refer: Current liabilities]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-URIDate 2017-03-09

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2017-01-01
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
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