Product Warranty (Tables)

6 Months Ended

Jun. 30, 2012

Product Warranties Disclosures [Abstract]

Schedule of Product Warranty Liability

The following table summarizes the change in product warranty liability during the six months ended June 30, 2012 (in thousands):

	Six months ended
	June 30, 2012
Beginning balance	$	1,098
Cost of warranty claims	(345		)
Accruals for product warranties	356
Total	$	1,109