Note 16 - Weighted-average Assumptions Used to Determine Net Pension (Income) Expenses (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
UNITED STATES
Weighted Average Assumptions Used To Determine Net Pension Income Expenses [Line Items]
Effective rate for service cost	3.49%	3.50%	4.19%
Effective rate for interest cost	2.82%	3.50%	4.19%
Salary increase rate	3.37%	3.34%	3.37%
Expected long-term rate of return on plan assets	7.40%	7.40%	7.63%
Non-US [Member]
Weighted Average Assumptions Used To Determine Net Pension Income Expenses [Line Items]
Effective rate for service cost	2.81%	2.09%	3.34%
Effective rate for interest cost	1.90%	2.09%	3.34%
Salary increase rate	1.91%	1.95%	2.62%
Expected long-term rate of return on plan assets	4.65%	4.69%	4.93%