CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010
Revenue
Product	$ 34,096	$ 24,486	$ 44,655
Service	23,189	24,202	23,962
Total revenue	57,285	48,688	68,617
Cost of revenue
Product	16,601	14,408	21,955
Service	7,730	8,102	8,999
Total cost of revenue	24,331	22,510	30,954
Gross profit	32,954	26,178	37,663
Operating expenses:
Research and development	27,190	26,619	31,685
Sales and marketing	10,444	10,755	10,942
General and administrative	8,759	8,194	9,098
Asset impairments	790		1,076
Restructuring	(271)		5,625
Total operating expenses	46,912	45,568	58,426
Loss from operations	(13,958)	(19,390)	(20,763)
Interest and other income, net	1,098	1,950	5,592
Loss before income taxes	(12,860)	(17,440)	(15,171)
Income tax expense (benefit)	64	358	(366)
Net loss	$ (12,924)	$ (17,798)	$ (14,805)
Net loss per share:
Basic	$ (0.45)	$ (0.62)	$ (0.52)
Diluted	$ (0.45)	$ (0.62)	$ (0.52)
Weighted average shares outstanding:
Basic	28,807	28,567	28,422
Diluted	28,807	28,567	28,422
Cash distribution paid per common share		$ 6.50	$ 10.00