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Stockholders' Equity and Stock-based Compensation (Details 4)	Apr. 30, 2013	Jul. 31, 2012
Common Stock Reserved for Issuance
Exercise of stock options to purchase common stock	4,016,543	6,486,641
Issuances of shares available under stock plans	9,308,740	7,655,332
Total common stock reserved for issuance	17,488,660	18,134,150
Restricted Stock Units (RSUs)
Common Stock Reserved for Issuance
Vesting of restricted stock units	4,163,377	3,992,177

- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

+ References+ Details