Related Party Transactions - Summary of Changes in Estimated Liability to Stright Path Included in Other Current Liabilities (Details) (Straight Path [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2014
Straight Path [Member]
Estimated liability to stright path included in other current liabilities
Balance at beginning of year	$ 931
Additional liability	1,930
Payments	(1,001)
Balance at end of year	$ 1,860