Product Warranty

6 Months Ended

Jun. 30, 2014

Product Warranties Disclosures [Abstract]

As of June 30, 2014 and December 31, 2013, MRV's product warranty liability recorded in accrued liabilities was $0.6 million. MRV accrues for warranty costs as part of cost of goods sold based on associated material product costs, technical support labor costs and associated overhead. The products sold are generally covered by a warranty for periods of 90 days to three years.

The following table summarizes the change in product warranty liability during the six months ended June 30, 2014 (in thousands):



	Six months ended
	June 30, 2014
Beginning balance	$	578
Cost of warranty claims	(18		)
Accruals for product warranties	43
Total	$	603