Note 17 - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Foreign Pension Plan [Member]
Components of net periodic benefit cost
Service cost	$ 778	$ 674	$ 743
Interest cost	589	884	658
Amortization of prior service cost/(benefit)	(5)	(7)	(7)
Recognized actuarial loss	330	149	284
Net periodic benefit cost	1,692	1,700	1,678
United States Pension Plan of US Entity [Member]
Components of net periodic benefit cost
Interest cost	2,430	3,310	3,057
Expected return on plan assets	(2,870)	(4,153)	(3,826)
Recognized actuarial loss	811	522	937
Loss on voluntary pension settlement		7,170
Net periodic benefit cost	371	6,849	168
Supplemental Employee Retirement Plan [Member]
Components of net periodic benefit cost
Interest cost	24	33	41
Amortization of prior service cost/(benefit)	57	57	57
Recognized actuarial loss	154	131	118
Net periodic benefit cost	$ 235	221	$ 216
Loss on voluntary pension settlement		$ 7,170