Notes Payable Notes Payable - Schedule of Borrowings (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2014	Jul. 31, 2013
Short-term Debt [Line Items]
Weighted average borrowing rate	1.3615%
Outstanding balance on credit facility	$ 23,946	$ 50,613
USD-Denominated Borrowing Credit Revolver [Member]
Short-term Debt [Line Items]
Interest rate	1.243%
USD-denominated credit facility China [Member]
Short-term Debt [Line Items]
Interest rate	1.48%