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Note 8 - Other Expense (Income), Net (Details Textual) - USD ($)
6 Months Ended
Jul. 02, 2017
Jul. 03, 2016
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property $ 2,537,000 $ 2,391,000
Foreign Currency Transaction Gain (Loss), before Tax $ 604,000 146,000
Toluca [Member]    
Sale Leaseback Transaction, Current Period Gain Recognized   $ 2,370,000