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Contingencies (Tables)
 6 Months Ended
Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Product Warranty Liability
Changes in the warranty liability for the six months June 30, 2015, and 2014, are summarized below:
 
 
Six Months Ended 
 June 30,
 
 
2015
 
2014
Aggregate product warranty liability at beginning of period
 
$
268

 
$
596

Net aggregate expense (benefit) related to product warranties
 
8

 
(75
)
Aggregate reductions for payments
 
(8
)
 
(22
)
Aggregate product warranty liability at end of period
 
$
268

 
$
499