Stock-Based Compensation (Details) (USD $)	9 Months Ended
Apr. 30, 2013
Options Outstanding, August 1, 2012	10,979,634
Options Granted	17,630,299
Options Forfeited or expired	485,778
Options Exercised	1,056,488
Options Outstanding, April 30, 2013	27,067,667
Options Exercisable, April 30, 2013	26,995,167
Weighted Average Exercise Price Share Outstanding, August 1, 2012	$ 0.257
Weighted Average Exercise Price Share Granted	$ 0.001
Weighted Average Exercise Price Share Forfeited or expired	$ 0.727
Weighted Average Exercise Price Share Exercised	$ 0.001
Weighted Average Exercise Price Share Outstanding, April 30, 2013	$ 0.092
Weighted Average Exercise Price Share Exercisable, April 30, 2013	$ 0.090
Aggregate Intrinsic Value Exercised	$ 37,320
Aggregate Intrinsic Value Outstanding, April 30, 2013	546,025
Aggregate Intrinsic Value Exercisable, April 30, 2013	$ 546,025

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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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.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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