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Note 11 - Net Foreign Exchange Gain (Details Textual) | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Statement Line Items [Line Items] |  |  |
Closing foreign exchange rate | 81.79 | 16.77 | 1

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- Definition The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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