Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2013

Commitments and Contingencies [Abstract]

Product warranty accrued liability

We provide warranties for our products for a specific period of time, generally twelve months, against material defects. We provide for the estimated future costs of warranty obligations in cost of sales when the related revenue is recognized. The accrued warranty costs represent the best estimate at the time of sale of the total costs that we expect to incur to repair or replace product parts that fail while still under warranty. The amount of accrued estimated warranty costs are primarily based on historical experience as to product failures as well as current information on repair costs. On a quarterly basis, we review the accrued balances and update these based on the historical warranty cost trends. The following table reflects the change in our warranty accrual which is included in "accrued liabilities" on the condensed consolidated balance sheets, during the three months ended March 31, 2013 and 2012 (in thousands):

	Three Months Ended March 31,
	2013			2012
Beginning accrued warranty and related costs	$	588		$	1,003
Accruals for warranties issued		264			102
Adjustments related to pre-existing warranties including expirations and changes in estimates		166			(8	)
Cost of warranty repair		(269	)		(100	)
Ending accrued warranty and related costs	$	749		$	997

Outstanding contractual obligations

Outstanding contractual obligations as of March 31, 2013 are summarized as follows (in thousands):

	Payments due by period
Contractual Obligations	Total		Less than 1 year		1-3 years		4-5 years		More than 5 years
Operating leases	$	917	$	389	$	528	$	—	$	—
Royalty agreement		3,925		800		1,544		1,150		431
Total	$	4,842	$	1,189	$	2,072	$	1,150	$	431