Note 10 - Pensions (Details) - Components of Net Periodic Benefit Cost (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
United States Pension Plan of US Entity [Member]
Note 10 - Pensions (Details) - Components of Net Periodic Benefit Cost [Line Items]
Service cost	$ 150	$ 150	$ 300	$ 300
Interest cost	971	892	1,942	1,783
Expected return on plan assets	(1,411)	(1,340)	(2,822)	(2,680)
Amortization of net loss	137	235	274	471
Total cost (credit) of the plan	(153)	(63)	(306)	(126)
Expected plan participants’ contribution	0	0	0	0
Net periodic benefit (credit) cost	(153)	(63)	(306)	(126)
Foreign Pension Plan [Member]
Note 10 - Pensions (Details) - Components of Net Periodic Benefit Cost [Line Items]
Service cost	311	268	622	523
Interest cost	592	299	1,183	482
Expected return on plan assets	(573)	(197)	(1,146)	(271)
Amortization of net loss	47	38	95	77
Total cost (credit) of the plan	377	408	754	811
Net periodic benefit (credit) cost	$ 377	$ 408	$ 754	$ 811