Product Warranties (Tables)

9 Months Ended

Sep. 30, 2014

Guarantees [Abstract]

Product Warranty Activity

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

	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
Balance at the beginning of the period	$	225		$	329		$	283		$	364
Accruals for warranties for products sold in the period		76			127			159			228
Fulfillment of warranty obligations		(98	)		(110	)		(230	)		(220	)
Revisions of estimated obligations		(1	)		1			(10	)		(25	)
Balance at the end of the period	$	202		$	347		$	202		$	347