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Organization, Use of Estimates and Basis of Presentation (Tables) | 9 Months Ended
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Jan. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] | The following table reflects the total potential share-based instruments outstanding at January 31, 2014 and 2013 that could have an effect on the future computation of dilution per common share:
|  | January 31, |
|  | 2014 |  | 2013 |
Stock options |  |  | 22,633,955 |  |  | 15,018,955 |
Warrants |  |  | 3,276,667 |  |  | 3,276,667 |
Restricted stock |  |  | - |  |  | 75,000 |
Total common stock equivalents |  |  | 25,910,622 |  |  | 18,370,622 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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