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Note 11 - Property, Plant and Equipment (Details) - Components of Property, Plant and Equipment (USD $)
In Thousands, unless otherwise specified
Jun. 29, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]    
Gross Property, plant and equipment $ 195,483 $ 192,392
Accumulated depreciation (153,152) (147,709)
42,331 44,683
Land and Land Improvements [Member]
    
Property, Plant and Equipment [Line Items]    
Gross Property, plant and equipment 3,006 2,999
Building and Building Improvements [Member]
    
Property, Plant and Equipment [Line Items]    
Gross Property, plant and equipment 26,294 26,053
Property, Plant and Equipment, Other Types [Member]
    
Property, Plant and Equipment [Line Items]    
Gross Property, plant and equipment 162,846 161,207
Construction in Progress [Member]
    
Property, Plant and Equipment [Line Items]    
Gross Property, plant and equipment $ 3,337 $ 2,133