Stockholders' Equity (Schedule of Warrants) (Details) - Warrant [Member] - USD ($) |
12 Months Ended | |
|---|---|---|
Apr. 30, 2016 |
Apr. 30, 2015 |
|
| Number of Shares | ||
| Balance Outstanding | 28,771,757 | |
| Granted | ||
| Forfeited | ||
| Exercised | (4,855,487) | |
| Expired | ||
| Balance Outstanding | 23,916,270 | 28,771,757 |
| Exercisable | 23,916,270 | |
| Weighted Average Exercise Price | ||
| Balance Outstanding | $ 0.26 | |
| Granted | ||
| Forfeited | ||
| Exercised | 0.155 | |
| Expired | ||
| Balance Outstanding | 0.19 | $ 0.26 |
| Exercisable | $ 0.19 | |
| Weighted Average Remaining Contractual Term | ||
| Balance Outstanding | 3 years | 4 years 2 months 12 days |
| Exercisable | 3 years | |
| Aggregate Intrinsic Value | ||
| Balance Outstanding, beginning balance | $ 179,791 | |
| Balance Outstanding | 85,978 | $ 179,791 |
| Exercisable | $ 85,978 | |
| X | ||||||||||
- Definition Weighted average remaining contractual term for equity-based awards excluding options that are currently exercisable, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
|
| X | ||||||||||
- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the equity instruments reserved for issuance on vested portions of non-options outstanding and currently exercisable under the non-option plan. No definition available.
|
| X | ||||||||||
- Definition Weighted average price at which the non-option holders acquired equity instruments when converting their non-options into equity instruments. No definition available.
|
| X | ||||||||||
- Definition Weighted average price at which grantees could have acquired the underlying equity instruments with respect to non-options of the plan that expired. No definition available.
|
| X | ||||||||||
- Definition Weighted average price at which grantees could have acquired the underlying equity instruments with respect to non-options that were terminated. No definition available.
|
| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the equity instruments by exercise of the non-options. No definition available.
|
| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the equity instruments reserved for issuance under the non-option plan. No definition available.
|
| X | ||||||||||
- Definition Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding Weighted Average Exercise Price [Abstract] No definition available.
|
| X | ||||||||||
- Definition Number of equity instruments other than options outstanding, into which fully or partially vested instruments outstanding as of the balance sheet date can be currently converted under the plan. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- Definition Number of non-option equity instruments exercised by participants. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- Definition Net number of non-option equity instruments granted to participants. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Intrinsic value of equity-based compensation awards outstanding. Excludes stock and unit options. No definition available.
|
| X | ||||||||||
- Definition Intrinsic value of equity-based compensation awards vested. Excludes stock and unit options. No definition available.
|
| X | ||||||||||
- Details
|