Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Oct. 27, 2012	Oct. 29, 2011
Revenue:
Product	$ 7,184	$ 9,898
Service	4,880	5,482
Total revenue	12,064	15,380
Cost of revenue:
Product	3,157	4,368
Service	1,746	1,894
Total cost of revenue	4,903	6,262
Gross profit	7,161	9,118
Operating expenses:
Research and development	6,489	6,485
Sales and marketing	2,381	2,670
General and administrative	3,087	1,985
Restructuring	1,988	(271)
Total operating expenses	13,945	10,869
Loss from operations	(6,784)	(1,751)
Interest and other income, net	201	234
Loss before income taxes	(6,583)	(1,517)
Income tax expense	173	97
Net loss	$ (6,756)	$ (1,614)
Net loss per share:
Basic	$ (0.23)	$ (0.06)
Diluted	$ (0.23)	$ (0.06)
Weighted average shares outstanding:
Basic	28,881	28,741
Diluted	28,881	28,741
Cash distribution paid per common share	$ 10.00