Note 11 - Components of Net Periodic Benefit Cost (Income) for the Domestic and International Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
United States Pension Plan of US Entity [Member]
Components of net periodic benefit cost
Interest cost	$ 597	$ 608
Expected return on plan assets	(662)	(718)
Recognized actuarial loss	194	203
Net periodic cost	129	93
Foreign Pension Plan [Member]
Components of net periodic benefit cost
Interest cost	187	149
Recognized actuarial loss	49	83
Net periodic cost	423	428
Service cost	188	197
Amortization of prior service benefit	$ (1)	$ (1)