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Product Warranty
9 Months Ended
Sep. 30, 2011
Product Warranty [Abstract] 
Product Warranty
11.  
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, 2010
 $   1,680
Warranty provision
         740
Warranty claims
       (331)
Currency adjustment
           (8)
Balance at September 30, 2011
 $   2,081