Stock-Based Compensation (Details) (USD $)	6 Months Ended
Jan. 31, 2013
Options Outstanding, August 1, 2012	10,979,634
Options Granted	0
Options Forfeited or expired	440,778
Options Exercised	85,701
Options Outstanding, January 31, 2013	10,453,155
Options Exercisable, January 31, 2013	10,369,405
Weighted Average Exercise Price Outstanding, August 1, 2012	$ 0.257
Weighted Average Exercise Price Granted	$ 0
Weighted Average Exercise Price Forfeited or expired	$ 0.736
Weighted Average Exercise Price Exercised	$ 0.001
Weighted Average Exercise Price Outstanding, January 31, 2013	$ 0.239
Weighted Average Exercise Price Exercisable, January 31, 2013	$ 0.236
Aggregate Intrinsic Value Exercised	$ 3,342
Aggregate Intrinsic Value Outstanding, January 31, 2013	220,359
Aggregate Intrinsic Value Exercisable, January 31, 2013	$ 220,359

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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