Note 6 - Net Periodic Benefit Cost (Details) - USD ($)	3 Months Ended
	Apr. 03, 2016	Apr. 05, 2015
Defined Benefit Retirement Plan Europe [Member]
Service cost	$ 258,000	$ 269,000
Interest cost	1,720,000	2,093,000
Expected return on assets	(1,997,000)	(2,247,000)
Amortization of prior service cost	27,000	8,000
Recognized net actuarial (gains)/losses	184,000	239,000
Net periodic benefit cost	192,000	362,000
Domestic SCP [Member]
Service cost	111,000	148,000
Interest cost	317,000	278,000
Amortization of prior service cost	0	0
Net periodic benefit cost	630,000	557,000
Amortization of (gain)/loss	$ 202,000	$ 131,000