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Note D - Product Warranties (Tables)
9 Months Ended
Sep. 30, 2014
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability [Table Text Block]
   

September 30,

 

(Dollars in thousands)

 

2014

   

2013

 

Balance at beginning of year

  $ 1,170     $ 1,133  

Provision

    1,161       1,023  

Claims

    (1,214 )     (995 )

Balance at end of period

  $ 1,117     $ 1,161