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Note 4 - Change in Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | [1] | Jan. 01, 2019
Statement Line Items [Line Items] |  |  |  |
Impairment loss recognised in profit or loss, trade receivables | $ 0 | $ 0 | $ 181 |
Bottom of range [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Weighted average lessee's incremental borrowing rate applied to lease liabilities recognised at date of initial application of IFRS 16 |  |  |  | 4.00%
Top of range [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Weighted average lessee's incremental borrowing rate applied to lease liabilities recognised at date of initial application of IFRS 16 |  |  |  | 10.25%
[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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- Definition The amount of impairment loss recognised in profit or loss for trade receivables. [Refer: Impairment loss recognised in profit or loss; Trade receivables] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The weighted average lessee's incremental borrowing rate applied to lease liabilities recognised in the statement of financial position at the date of initial application of IFRS 16. The incremental borrowing rate is the rate of interest that a lessee would have to pay to borrow over a similar term, and with a similar security, the funds necessary to obtain an asset of a similar value to the right-of-use asset in a similar economic environment. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph C12 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_C12_a&doctype=Appendix&subtype=C -URIDate 2019-03-27 + Details
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