Note 6 - Net Periodic Benefit Cost (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 05, 2015	Jun. 29, 2014	Jul. 05, 2015	Jun. 29, 2014
Defined Benefit Retirement Plan Europe [Member]
Service cost	$ 265,000	$ 188,000	$ 534,000	$ 363,000
Interest cost	2,111,000	2,849,000	4,204,000	5,364,000
Expected return on assets	(2,265,000)	(3,195,000)	(4,512,000)	(6,020,000)
Amortization of prior service cost	9,000	13,000	17,000	25,000
Recognized net actuarial losses	242,000	175,000	481,000	328,000
Net periodic benefit cost	362,000	30,000	724,000	60,000
Salary Continuation Plan SCP [Member]
Service cost	148,000	125,000	297,000	250,000
Interest cost	278,000	268,000	556,000	535,000
Amortization of prior service cost	0	6,000	0	12,000
Net periodic benefit cost	557,000	466,000	1,114,000	930,000
Amortization of loss	$ 131,000	$ 67,000	$ 261,000	$ 133,000