Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
Net Revenue:
Product	$ 126,376	$ 130,479	$ 366,443	$ 378,686
Engineering	1,604	3,080	4,354	7,134
Total net revenue	127,980	133,559	370,797	385,820
Cost of sales:
Product	71,340	75,046	202,410	214,261
Engineering	1,707	2,560	3,736	6,114
Total cost of sales	73,047	77,606	206,146	220,375
Gross profit	54,933	55,953	164,651	165,445
Operating expenses:
Research and product development	16,464	17,156	50,269	50,950
Selling and marketing	15,796	15,928	46,278	47,283
General and administrative	13,208	15,339	48,712	42,634
Restructuring	1,839	(107)	8,269	(317)
Total operating expenses	47,307	48,316	153,528	140,550
Income from operations	7,626	7,637	11,123	24,895
Other (expense) income, net	(934)	201	(4,899)	150
Income before income taxes	6,692	7,838	6,224	25,045
Provision for (benefit from) income taxes	1,722	(1,286)	2,863	2,437
Net income	$ 4,970	$ 9,124	$ 3,361	$ 22,608
Net income per common share:
Basic	$ 0.40	$ 0.73	$ 0.27	$ 1.82
Diluted	$ 0.40	$ 0.72	$ 0.27	$ 1.79
Weighted average shares outstanding:
Basic	12,392	12,419	12,412	12,401
Diluted	12,553	12,603	12,623	12,601
Dividends declared and paid per share	$ 0.10	$ 0.10	$ 0.30	$ 0.30