Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Net Revenue:
Product	$ 125,938	$ 131,272	$ 240,067	$ 248,207
Engineering	1,931	2,673	2,750	4,054
Total net revenue	127,869	133,945	242,817	252,261
Cost of sales:
Product	68,123	74,077	131,070	139,215
Engineering	967	2,375	2,029	3,554
Total cost of sales	69,090	76,452	133,099	142,769
Gross profit	58,779	57,493	109,718	109,492
Operating expenses:
Research and product development	16,566	16,425	33,805	33,794
Selling and marketing	15,249	15,846	30,482	31,355
General and administrative	22,308	13,073	35,504	27,295
Restructuring	3,147	(152)	6,430	(210)
Total operating expenses	57,270	45,192	106,221	92,234
Income from operations	1,509	12,301	3,497	17,258
Other (expense), net	(3,507)	(169)	(3,965)	(51)
(Loss) Income before income taxes	(1,998)	12,132	(468)	17,207
Provision for income taxes	987	2,302	1,141	3,723
Net (loss) income	$ (2,985)	$ 9,830	$ (1,609)	$ 13,484
Net (loss) income per common share:
Basic	$ (0.24)	$ 0.79	$ (0.13)	$ 1.09
Diluted	$ (0.24)	$ 0.78	$ (0.13)	$ 1.07
Weighted average shares outstanding:
Basic	12,418	12,378	12,422	12,393
Diluted	12,418	12,558	12,422	12,588
Dividends declared and paid per share	$ 0.10	$ 0.10	$ 0.20	$ 0.20