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Product Warranty
 6 Months Ended
Jun. 30, 2015
Product Warranty [Abstract]  
Product Warranty
12.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, 2014
 
$
1,456
 
Warranty provision
  
369
 
Warranty claims
  
(209
)
Currency adjustment
  
(43
)
Balance at June 30, 2015
 
$
1,573