Note 20 - Weighted-average Assumptions Used to Determine Net Pension (Income) Expenses (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
U.S. [Member]
Weighted Average Assumptions Used To Determine Net Pension Income Expenses [Line Items]
Expected long-term rate of return on plan assets	6.00%
Non-US [Member]
Weighted Average Assumptions Used To Determine Net Pension Income Expenses [Line Items]
Expected long-term rate of return on plan assets	3.30%
Defined Benefit Plans [Member] | U.S. [Member]
Weighted Average Assumptions Used To Determine Net Pension Income Expenses [Line Items]
Effective rate for service cost	4.03%	3.33%
Effective rate for interest cost	3.75%	2.96%
Salary increase rate	3.50%	3.50%
Expected long-term rate of return on plan assets	6.50%	6.40%
Defined Benefit Plans [Member] | Non-US [Member]
Weighted Average Assumptions Used To Determine Net Pension Income Expenses [Line Items]
Effective rate for service cost	2.47%	2.32%
Effective rate for interest cost	1.89%	1.70%
Salary increase rate	2.06%	2.17%
Expected long-term rate of return on plan assets	3.46%	3.98%