Contingencies (Tables)

9 Months Ended

Sep. 30, 2013

Commitments and Contingencies Disclosure [Abstract]

Schedule of Product Warranty Liability

Changes in the warranty liability for the nine months September 30, 2013, and 2012, are summarized below:

	Nine Months Ended   September 30,
	2013			2012
Aggregate product warranty liability at beginning of period	$	776		313
Net aggregate expense related to product warranties	208			710
Aggregate reductions for payments	(89		)	(240		)
Aggregate product warranty liability at end of period	$	895		$	783