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Note 7 - Other (Income), Net (Details Textual) - USD ($)
3 Months Ended
Apr. 01, 2018
Apr. 02, 2017
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component $ 175,000 $ 156,000
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property 281,000 2,416,000
Foreign Currency Transaction Gain (Loss), before Tax, Total $ (27,000) $ (430,000)