Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014
Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited)
Net sales	$ 19,375	$ 16,135	$ 54,211	$ 46,761
Cost of sales	9,270	7,223	25,252	20,527
Gross profit	10,105	8,912	28,959	26,234
Operating expenses
Research and development	991	1,302	3,218	4,012
Sales and marketing	3,864	3,450	11,203	10,655
Medical device excise tax	126	83	370	323
Exit costs	0	64	719	578
General and administrative	3,355	2,602	9,325	8,240
Total operating expenses	8,336	7,501	24,835	23,808
Operating income	1,769	1,411	4,124	2,426
Other income (expense)
Investment income	1	1	3	7
Interest expense	(39)	0	(53)	0
Total other income (expenses)	(38)	1	(50)	7
Income from operations before provision for income taxes	1,731	1,412	4,074	2,433
Provision for income taxes	502	469	1,125	781
Net income	1,229	943	2,949	1,652
Earnings per share:
Basic earnings per share (in dollars per share)	$ 0.05	$ 0.04	$ 0.12	$ 0.07
Diluted earnings per share (in dollars per share)	$ 0.05	$ 0.04	$ 0.12	$ 0.07
Basic weighted average common shares outstanding (in shares)	25,371,764	25,331,925	25,358,631	25,311,641
Diluted weighted average common shares outstanding (in shares)	25,476,336	25,392,782	25,429,946	25,388,493
Net income	1,229	943	2,949	1,652
Foreign currency translation adjustment	378	41	(1,438)	181
Comprehensive income	$ 1,607	$ 984	$ 1,511	$ 1,833