Note 10 - Pensions (Details) - Components of Net Periodic Benefit Cost (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
United States Pension Plan of US Entity, Defined Benefit [Member]
Note 10 - Pensions (Details) - Components of Net Periodic Benefit Cost [Line Items]
Service cost	$ 150	$ 150
Interest cost	971	891
Expected return on plan assets	(1,411)	(1,340)
Amortization of net loss	137	236
Total cost of the plan	(153)	(63)
Expected plan participants’ contribution	0	0
Net periodic benefit cost	(153)	(63)
Foreign Pension Plan, Defined Benefit [Member]
Note 10 - Pensions (Details) - Components of Net Periodic Benefit Cost [Line Items]
Service cost	311	255
Interest cost	591	183
Expected return on plan assets	(573)	(74)
Amortization of net loss	48	39
Total cost of the plan	377	403
Expected plan participants’ contribution	0	0
Net periodic benefit cost	$ 377	$ 403