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Note 36 - Related Parties (Details Textual)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Statement Line Items [Line Items]      
Estimated financial effect of contingent liabilities, determinate number of years for severance pay 2    
Expense from cash-settled share-based payment transactions including costs included in production costs $ 295 $ 107 $ 43
Contingent liability arising from termination [member]      
Statement Line Items [Line Items]      
Estimated financial effect of contingent liabilities $ 8,338 $ 6,259 $ 6,567