Note 12 - Components of Net Periodic Benefit Cost (Details) - USD ($)	12 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Dec. 28, 2013
United States Pension Plan of US Entity [Member]
Components of net periodic benefit cost:
Service cost	$ 750,000	$ 600,000	$ 600,000
Interest cost	3,093,000	3,884,000	3,565,000
Expected return on plan assets	$ (2,749,000)	$ (5,646,000)	$ (5,360,000)
Amortization of prior service (credit)
Amortization of losses	$ 870,000	$ 549,000	$ 942,000
Total cost (credit) of the plan for the year	1,964,000	(613,000)	(253,000)
Expected plan participants’ contributions	0	0	0
Net periodic benefit cost (credit)	1,964,000	$ (613,000)	$ (253,000)
Settlement loss	29,928,000
Total expense (income) for the year	31,892,000	$ (613,000)	$ (253,000)
Foreign Pension Plan [Member]
Components of net periodic benefit cost:
Service cost	824,000	925,000	744,000
Interest cost	1,735,000	2,060,000	1,376,000
Expected return on plan assets	$ (2,346,000)	$ (2,292,000)	$ (1,207,000)
Amortization of prior service (credit)
Amortization of losses	$ 221,000	$ 216,000	$ 130,000
Total cost (credit) of the plan for the year	434,000	909,000	1,043,000
Expected plan participants’ contributions	0	0	0
Net periodic benefit cost (credit)	$ 434,000	$ 909,000	$ 1,043,000
Settlement loss
Total expense (income) for the year	$ 434,000	$ 909,000	$ 1,043,000
Service cost	1,574,000	1,525,000
Interest cost	4,828,000	5,944,000
Total cost (credit) of the plan for the year	$ 32,400,000	$ 300,000	$ 800,000