Product Warranties (Tables)

6 Months Ended

Jun. 30, 2014

Guarantees [Abstract]

Product Warranty Activity

Product warranty activity for the three and six months ended June 30, was as follows (in thousands):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
Balance at the beginning of the period	$	249		$	324		$	283		$	364
Accruals for warranties for products sold in the period		60			72			84			101
Fulfillment of warranty obligations		(77	)		(63	)		(132	)		(110	)
Revisions of estimated obligations		(7	)		(4	)		(10	)		(26	)
Balance at the end of the period	$	225		$	329		$	225		$	329