Stock-Based Compensation - Summary of common stock, and non-vested common stock, options granted, forfeited or expired and exercised (Details) (USD $)	3 Months Ended
Oct. 31, 2013	Oct. 31, 2013
Options
Options Outstanding		$ 29,701,197
Options Granted	8,879,499
Options Forfeited or expired	0
Options Exercised	0
Options Outstanding	38,580,696
Options Exercisable	29,701,197
Weighted Average Exercise Price per Share
Weighted Average Exercise Price per Share		$ 0.080
Weighted Average Exercise Price per Share, Granted	$ 0.001
Weighted Average Exercise Price per Share, Forfeited or expired
Weighted Average Exercise Price per Share, Exercised
Weighted Average Exercise Price per Share, Outstanding	$ 0.062
Weighted Average Exercise Price per Share, Exercisable	$ 0.080
Aggregate Intrinsic Value
Options Outstanding	966,445
Options Exercisable	708,940
Non-vested Options
Options Outstanding		$ 60,000
Options Granted	8,879,499
Options Vested	(60,000)
Options Forfeited or expired	0
Options Outstanding	8,879,499
Non-vested Weighted Average Grant Date Fair Value
Weighted Average Exercise Price per Share		$ 0.460
Weighted Average Exercise Price per Share, Granted	$ 0.029
Weighted Average Vested, Grant Date Fair Value	$ 0.460
Weighted Average Exercise Price per Share, Forfeited or expired
Weighted Average Exercise Price per Share, Outstanding	$ 0.029

Intrinsic value of equity-based compensation awards outstanding. Excludes stock and unit options.

No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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.

+ References

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(3)-(4)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(3)-(4)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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

+ References

No definition available.

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- Definition

The increase or decrease in number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding, including vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Subparagraph (c)(1)

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- Definition

Change in the weighted average exercise price of options outstanding.

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Number of options vested.

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No definition available.

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- Definition

Weighted average grant-date fair value of options vested.

+ References

No definition available.

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- Definition

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

+ References

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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- Definition

Number of share options (or share units) exercised during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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