Note 10 - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2016		Mar. 28, 2015
United States Pension Plan of US Entity [Member]
Service cost		[1]	$ 250
Interest cost		[1]	1,031
Expected return on plan assets		[1]	(916)
Amortization of net loss		[1]	290
Total cost of the plan		[1]	655
Net periodic benefit cost		[1]	655
Foreign Pension Plan [Member]
Service cost	$ 332		315
Interest cost	497		513
Expected return on plan assets	(520)		(600)
Amortization of net loss	73		61
Total cost of the plan	382		289
Net periodic benefit cost	$ 382		$ 289

[1] The U.S. pension plan was terminated effective July 30, 2014 and, following receipt of a favorable Letter of Determination from the IRS (dated April14, 2015), all liabilities of the plan were settled during the third quarter of fiscal 2015.