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Stockholders' Equity (Schedule of Warrants) (Details) (Warrant [Member], USD $)
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3 Months Ended |
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Jul. 31, 2013
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Warrant [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Beginning Balance | 9,090,292 |
| Granted | 1,115,026 |
| Exercised | |
| Forfeited | (40,000) |
| Expired | |
| Ending Balance | 10,165,318 |
| Weighted average exercise price, beginning | $ 0.46 |
| Weighted average exercise price, granted | $ 0.33 |
| Weighted average exercise price, forfeited | $ 0.50 |
| Weighted average exercise price, ending | $ 0.45 |
| Weighted Average Remaining Contractual Term, Outstanding | 4 years 1 month 6 days |
| Aggregate Intrinsic Value, Outstanding | $ 51,862 |
| Exercisable | 10,165,318 |
| Weighted Average Exercise Price, Exercisable | $ 0.45 |
| Weighted Average Remaining Contractual Term, Exercisable | 4 years 1 month 6 days |
| Aggregate Intrinsic Value, Exercisable | $ 51,862 |
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- Definition
The number of exercisable warrants (fully vested and expected to vest) that may be converted as of the balance sheet date. No definition available.
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- Definition
Weighted average price at which grantees can acquire the shares upon exercise of the warrants. No definition available.
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- Definition
Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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- Definition
Weighted average exercise price of warrants forfeited. No definition available.
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- Definition
Weighted average exercise price of warrants granted. No definition available.
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- Definition
Weighted average price at which grantees can acquire the shares upon exercise of the warrants. No definition available.
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- Definition
Intrinsic value of equity-based compensation awards outstanding. Excludes stock and unit options. No definition available.
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- Definition
Intrinsic value of equity-based compensation awards vested. Excludes stock and unit options. No definition available.
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- Definition
Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Number of non-option equity instruments exercised by participants. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of shares under non-option equity instrument agreements for which rights to exercise lapsed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Net number of non-option equity instruments granted to participants. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of equity instruments other than options outstanding, including both vested and non-vested instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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