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Note 19 - Weighted-average Assumptions Used to Determine Net Pension (Income) Expenses (Details)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Non-US [Member]    
Weighted Average Assumptions Used To Determine Net Pension Income Expenses [Line Items]    
Expected long-term rate of return on plan assets 3.86%  
Defined Benefit Plans [Member] | U.S. [Member]    
Weighted Average Assumptions Used To Determine Net Pension Income Expenses [Line Items]    
Effective rate for service cost 3.33% 3.68%
Effective rate for interest cost 2.96% 3.06%
Salary increase rate 3.50% 3.43%
Expected long-term rate of return on plan assets 6.40% 7.00%
Defined Benefit Plans [Member] | Non-US [Member]    
Weighted Average Assumptions Used To Determine Net Pension Income Expenses [Line Items]    
Effective rate for service cost 2.32% 2.66%
Effective rate for interest cost 1.70% 1.56%
Salary increase rate 2.17% 2.09%
Expected long-term rate of return on plan assets 3.98% 4.21%