Product Warranty

6 Months Ended

Jun. 30, 2012

Product Warranty [Abstract]

Product Warranty

(7) Product Warranty

The Company’s products carry limited warranties that range from one to four years and vary by product. The warranty period begins on the date of retail purchase or lease by the original purchaser. The Company accrues estimated product warranty costs at the time of sale and any additional amounts are recorded when such costs are probable and can be reasonably estimated. Factors that affect the Company’s warranty liability include the number of units sold or leased, historical and anticipated rates of warranty repairs and the cost per repair. Warranty and related costs are reflected within sales, marketing and support in the accompanying statements of operations. As of June 30, 2012 and December 31, 2011, the Company had accrued product warranty costs of $924 and $933, respectively. The following table summarizes product warranty activity during 2012 and 2011:

	Six months ended June 30,
	2012			2011
Beginning balance	$	933		$	887
Charges to expense		243			233
Costs incurred		(252	)		(325	)
Ending balance	$	924		$	795