Goodwill and Other Intangibles - Schedule of Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period	5 years 8 months 12 days	6 years
Gross Carrying Amount	$ 4,532	$ 5,273
Accumulated Amortization	(2,790)	(3,883)
Net Balance	1,742	1,390
Intellectual Property [Member]
Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period	4 years 8 months 12 days	4 years 8 months 12 days
Gross Carrying Amount	670	2,119
Accumulated Amortization	(335)	(1,715)
Net Balance	335	404
Customer Lists [Member]
Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period	6 years 6 months	6 years 9 months 18 days
Gross Carrying Amount	3,154	3,154
Accumulated Amortization	(2,387)	(2,168)
Net Balance	767	986
Technology and domain names [Member]
Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period	3 years
Gross Carrying Amount	708
Accumulated Amortization	(68)
Net Balance	$ 640