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Product Warranty
9 Months Ended
Sep. 30, 2012
Product Warranty [Abstract]  
Product Warranty
 
10.  
Product Warranty

As the Company recognizes revenue under the percentage-of-completion method, it provides an accrual for estimated future warranty costs based on historical experience and projected claims.  The activity in the warranty account is as follows:
 

(in thousands)
   
     
Balance at December 31, 2011
 $2,300 
Warranty provision
  727 
Warranty claims
  (897)
Currency adjustment
  27 
Balance at September 30, 2012
 $2,157