Income Taxes (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Income Taxes [Abstract]
U.S. federal income tax at statutory rate	$ (10,314)	$ (32,271)	$ (8,747)
Valuation allowance			4,110
Foreign tax rate differential	6,035	25,757	961
Nondeductible expenses	487	659	761
Other	(67)	(73)	7
Prior year tax (expense) benefit	(231)		(960)
State and local income tax, net of federal benefit	(20)	(160)	(114)
Provision for income taxes	$ (4,110)	$ (6,088)	$ (3,982)