Note 16 - Weighted-average Assumptions Used to Determine Benefit Obligation Amounts (Details)	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
UNITED STATES
Weighted Average Assumptions Used To Determine Benefit Obligation Amounts [Line Items]
Discount rate	3.74%	3.89%	3.50%
Salary increase rate	3.43%	3.37%	3.34%
Non-US [Member]
Weighted Average Assumptions Used To Determine Benefit Obligation Amounts [Line Items]
Discount rate	2.04%	2.50%	2.09%
Salary increase rate	1.99%	1.91%	1.95%