Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 28, 2012	Jan. 29, 2011	Jan. 28, 2012	Jan. 29, 2011
Revenue:
Product	$ 7,369	$ 5,593	$ 17,267	$ 11,317
Service	5,815	6,564	11,297	12,549
Total revenue	13,184	12,157	28,564	23,866
Cost of revenue:
Product	3,493	3,090	7,861	7,763
Service	1,942	2,027	3,836	4,239
Total cost of revenue	5,435	5,117	11,697	12,002
Gross profit	7,749	7,040	16,867	11,864
Operating expenses:
Research and development	7,048	6,239	13,533	13,550
Sales and marketing	2,557	2,643	5,227	5,243
General and administrative	2,140	2,030	4,125	4,156
Restructuring			(271)
Total operating expenses	11,745	10,912	22,614	22,949
Loss from operations	(3,996)	(3,872)	(5,747)	(11,085)
Interest and other income, net	391	470	625	1,238
Loss before income taxes	(3,605)	(3,402)	(5,122)	(9,847)
Income tax expense	89	103	186	197
Net loss	$ (3,694)	$ (3,505)	$ (5,308)	$ (10,044)
Net loss per share:
Basic	$ (0.13)	$ (0.12)	$ (0.18)	$ (0.35)
Diluted	$ (0.13)	$ (0.12)	$ (0.18)	$ (0.35)
Weighted average shares outstanding:
Basic	28,754	28,531	28,748	28,491
Diluted	28,754	28,531	28,748	28,491
Cash distribution paid per common share		$ 6.50		$ 6.50