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Note 20 - Weighted-average Assumptions Used to Determine Net Pension (Income) Expenses (Details)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
U.S. [Member]    
Weighted Average Assumptions Used To Determine Net Pension Income Expenses [Line Items]    
Expected long-term rate of return on plan assets 5.20%  
Defined Benefit Plans [Member] | U.S. [Member]    
Weighted Average Assumptions Used To Determine Net Pension Income Expenses [Line Items]    
Effective rate for service cost 2.97% 4.03%
Effective rate for interest cost 2.58% 3.75%
Salary increase rate 3.50% 3.50%
Expected long-term rate of return on plan assets 6.00% 6.50%
Interest crediting rate for cash balance plan 2.50% 2.50%
Defined Benefit Plans [Member] | Non-US [Member]    
Weighted Average Assumptions Used To Determine Net Pension Income Expenses [Line Items]    
Effective rate for service cost 1.48% 2.47%
Effective rate for interest cost 1.19% 1.89%
Salary increase rate 1.72% 2.06%
Expected long-term rate of return on plan assets 3.27% 3.46%