Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Jul. 31, 2012	$ 25	$ 26,421	$ 30,538	$ (506)	$ 56,478
Balance (in shares) at Jul. 31, 2012	25,160,069
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	2,559	0	2,559
Foreign currency translation adjustment	0	0	0	47	47
Restricted stock grants	$ 0	293	0	0	293
Restricted stock grants (in shares)	58,272
Stock-based compensation	$ 0	638	0	0	638
Stock-based compensation (in shares)	15,309
Proceeds from stock options exercised	$ 0	65	0	0	65
Proceeds from stock options exercised (in shares)	59,310
Tax benefit associated with stock options exercised	$ 0	72	0	0	72
Balance at Jul. 31, 2013	$ 25	27,489	33,097	(459)	60,152
Balance (in shares) at Jul. 31, 2013	25,292,960
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	3,063	0	3,063
Foreign currency translation adjustment	0	0	0	104	104
Restricted stock grants	$ 0	426	0	0	426
Restricted stock grants (in shares)	7,000
Stock-based compensation	$ 0	582	0	0	582
Stock-based compensation (in shares)	14,648
Proceeds from stock options exercised	$ 0	59	0	0	59
Proceeds from stock options exercised (in shares)	50,000
Tax benefit associated with stock options exercised	$ 0	38	0	0	38
Balance at Jul. 31, 2014	$ 25	28,594	36,160	(355)	64,424
Balance (in shares) at Jul. 31, 2014	25,364,608
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	4,478	0	4,478
Foreign currency translation adjustment	0	0	0	(1,339)	(1,339)
Restricted stock grants	$ 0	361	0	0	361
Restricted stock grants (in shares)	172,221
Restricted stock relinquished for tax payments	$ 0	(95)	0	0	(95)
Stock-based compensation	$ 0	568	0	0	568
Stock-based compensation (in shares)	13,958
Proceeds from stock options exercised	$ 1	28	0	0	29
Proceeds from stock options exercised (in shares)	22,500
Tax benefit associated with stock options exercised	$ 0	16	0	0	16
Balance at Jul. 31, 2015	$ 26	$ 29,472	$ 40,638	$ (1,694)	$ 68,442
Balance (in shares) at Jul. 31, 2015	25,573,287