Stock-Based Compensation (Details 2) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
Apr. 30, 2013	Apr. 30, 2013	Jul. 31, 2012
Additional disclosures
Weighted-average grant date fair value (in dollars per share)	$ 0.18	$ 0.15	$ 0.18
Unrecognized non-cash compensation cost	$ 206,000	$ 206,000	$ 242,000
Weighted average period for recognition of unrecognized non-cash compensation cost		1 year 8 months 5 days	10 months 21 days
$0.18 - 0.42
Stock option activity by range of exercise prices
Exercise price, low end of the range (in dollars per share)		$ 0.18
Exercise price, high end of the range (in dollars per share)		$ 0.42
Number of Shares Outstanding	4,351,500	4,351,500
Weighted Average Contractual Life		6 years 11 months 8 days
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 0.23	$ 0.23
Number of Shares Exercisable	3,060,699	3,060,699
Weighted Average Remaining Contractual Life		5 years 10 months 6 days
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 0.22	$ 0.22

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Aggregate unrecognized cost of option awards made to employees under a stock option plan or plans, that have yet to vest.

+ References

No definition available.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph c(1)

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- Definition

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

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- Definition

Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

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-Publisher FASB

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-Number 123R

-Paragraph A240

-Subparagraph b(1)(c)

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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