Product Warranty (Tables)

3 Months Ended

Mar. 31, 2014

Product Warranties Disclosures [Abstract]

Schedule of Product Warranty Liability

The following table summarizes the change in product warranty liability during the three months ended March 31, 2014 (in thousands):

	Three months ended
	March 31, 2014
Beginning balance		$578
Cost of warranty claims	(15		)
Accruals for product warranties	33
Total		$596