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Note 16 - Employee Benefit Plans - Components of Pension Expense (Benefit) (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jul. 05, 2015
Jun. 29, 2014
Jul. 05, 2015
Jun. 29, 2014
Service cost $ 3,000 $ 0 $ 7,000 $ 6,000
Interest cost on projected benefit obligation 411,000 448,000 845,000 895,000
Net amortizations, deferrals and other costs 177,000 123,000 347,000 265,000
Expected return on plan assets (558,000) (592,000) (1,122,000) (1,199,000)
Pension expense (benefit) $ 33,000 $ (21,000) $ 77,000 $ (33,000)