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Note 20 - Deferred Income Tax (Details Textual)
$ in Millions
Dec. 31, 2019
USD ($)
Statement Line Items [Line Items]  
Recognized tax losses expiring within one year, percentage 0.20%
Recognized tax losses expiring in two to five years, percentage 2.50%
Recognized tax losses expiring in more than five years, percentage 97.30%
Unused tax losses for which no deferred tax asset recognised $ 121.2
Unused tax losses for which no deferred tax asset recognised, percent expiring in less than one year 2.80%
Unused tax losses for which no deferred tax asset recognised, percent expiring between two and five years 20.20%
Unused tax losses for which no deferred tax asset recognised, percent expiring in more than five years 77.00%
UNITED STATES  
Statement Line Items [Line Items]  
Deferred tax assets related to taxable losses of subsidiaries $ 338.0