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Subsequent Events Subsequent Events	12 Months Ended
Subsequent Events Subsequent Events	Jul. 31, 2016
Subsequent Event [Line Items]
Subsequent Events [Text Block]	20 — Subsequent Events Exercise of Stock Options In September 2016, certain executives exercised, on a net issuance basis, options to acquire an aggregate of 9,000,000 shares of the Company's common stock subject to options outstanding under the Company's 2001 Stock Plan and 2007 Equity Incentive Plan, as well as pursuant to a stand-alone stock option agreements dated April 14, 2009. As a result of the exercise and the executives' surrender of shares to satisfy the exercise price and tax withholding obligations, the Company issued the executives a net number of 3,667,853 shares of its common stock. All shares surrendered to satisfy the exercise price and tax withholding obligations were canceled. Drawdown Under Credit Agreement In September 2016, the Company initiated a drawdown of $135.0 million under the Company's existing Revolving Loan Facility. These funds are being used for general corporate purposes, including working capital and capital expenditures, as well as the satisfaction of the Company’s tax withholding obligations on behalf of certain executives, arising from their exercise of stock options, as described above.