Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Net revenue:
Product	$ 108,454	$ 112,547
Engineering	1,628	7,320
Total net revenue	110,082	119,867
Cost of sales:
Product	65,626	68,674
Engineering	1,520	6,107
Total cost of sales	67,146	74,781
Gross profit	42,936	45,086
Operating expenses:
Research and product development	18,854	14,074
Selling and marketing	14,570	11,655
General and administrative	14,916	11,922
Restructuring	(39)
Total operating expenses	48,301	37,651
(Loss) income from operations	(5,365)	7,435
Other expense, net	(421)	(906)
(Loss) income before income taxes	(5,786)	6,529
(Benefit from) provison for income taxes	(2,011)	2,148
Net (loss) income	$ (3,775)	$ 4,381
Net (loss) income per common share:
Basic	$ (0.30)	$ 0.36
Diluted	$ (0.30)	$ 0.35
Weighted average shares outstanding:
Basic	12,443	12,323
Diluted	12,443	12,582
Dividends declared and paid per share:	$ 0.10	$ 0.10