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Note 10 - Property, Plant and Equipment (Tables)
3 Months Ended
Apr. 05, 2015
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment [Table Text Block]
    April 5,      December 31,  
    2015     2014  
    (Unaudited)          

Land and land improvements

  $ 2,703     $ 2,770  

Buildings and building improvements

    25,947       26,055  

Machinery, equipment, furniture and fixtures

    159,050       158,816  

Construction in progress

    1,079       2,100  
      188,779       189,741  

Accumulated depreciation

    (153,153 )     (152,087 )
    $ 35,626     $ 37,654