Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 26, 2013	Jan. 28, 2012	Jan. 26, 2013	Jan. 28, 2012
Revenue:
Product	$ 4,591	$ 7,369	$ 11,775	$ 17,267
Service	4,879	5,815	9,759	11,297
Total revenue	9,470	13,184	21,534	28,564
Cost of revenue:
Product	2,346	3,493	5,503	7,861
Service	1,675	1,942	3,421	3,836
Total cost of revenue	4,021	5,435	8,924	11,697
Gross profit	5,449	7,749	12,610	16,867
Operating expenses:
Research and development	4,177	7,048	10,666	13,533
Sales and marketing	2,257	2,557	4,638	5,227
General and administrative	2,793	2,140	5,880	4,125
Restructuring	264		2,252	(271)
Total operating expenses	9,491	11,745	23,436	22,614
Loss from operations	(4,042)	(3,996)	(10,826)	(5,747)
Interest and other income, net	35	391	236	625
Loss before income taxes	(4,007)	(3,605)	(10,590)	(5,122)
Income tax expense	1,233	89	1,406	186
Net loss	$ (5,240)	$ (3,694)	$ (11,996)	$ (5,308)
Net loss per share:
Basic	$ (0.18)	$ (0.13)	$ (0.42)	$ (0.18)
Diluted	$ (0.18)	$ (0.13)	$ (0.42)	$ (0.18)
Weighted average shares outstanding:
Basic	28,882	28,754	28,882	28,748
Diluted	28,882	28,754	28,882	28,748
Cash distributions paid per common share	$ 2.50		$ 12.50