Note 5 - Investments - Movements in Warrants (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Statement Line Items [Line Items]
Warrants	$ 39	$ 661
Increase (decrease) in fair value of credit derivatives or similar instruments related to financial assets designated as measured at fair value through profit or loss	(39)	(622)
Warrants		$ 39

The increase (decrease) in the fair value of credit derivatives or similar instruments related to financial assets designated as measured at fair value through profit or loss. [Refer: Derivatives [member]; Financial assets]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 9
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_9_d&doctype=Standard
-URIDate 2019-03-27

Name:	ifrs-full_ChangesInFairValueOfFinancialAssetsRelatedCreditDerivativesOrSimilarInstruments
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration