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Product Warranty
 3 Months Ended
Mar. 31, 2014
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, 2013
 
$
1,851
 
Warranty provision
  
184
 
Warranty claims
  
(244
)
Currency adjustment
  
(1
)
Balance at March 31, 2014
 
$
1,790