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Note 19 - Weighted-average Assumptions Used to Determine Benefit Obligation Amounts (Details)
Dec. 31, 2018
Dec. 31, 2017
U.S. [Member]    
Weighted Average Assumptions Used To Determine Benefit Obligation Amounts [Line Items]    
Discount rate 4.04% 3.34%
Salary increase rate 3.50% 3.50%
Non-US [Member]    
Weighted Average Assumptions Used To Determine Benefit Obligation Amounts [Line Items]    
Discount rate 2.05% 1.90%
Salary increase rate 2.06% 2.17%