Note 7 - Property, Plant, and Equipment
 12 Months Ended
Dec. 31, 2015
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Disclosure [Text Block]

7)

Property, plant, and equipment

Property, plant, and equipment consisted of the following at December 31:


   

2015

    

2014

  

Land and land improvements

   $ 5,741     $ 5,741  

Buildings and building equipment

     26,478       26,524  

Machinery and equipment

     157,289       152,792  

Construction in progress

     3,586       1,186  

Accumulated depreciation

     (68,764

)

     (58,872

)

Total

   $ 124,330     $ 127,371  

Depreciation expense totaled $10,079, $8,981, and $10,316 for the years ended December 31, 2015, 2014, and 2013, respectively.