Summary of Significant Accounting Policies - Net Income (Loss) Per Share (Details Narrative)	12 Months Ended
Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011
Stock Options
Anti-dilutive securities not included in diluted net loss per common share computation	319,908	299,317	316,533
Warrant
Anti-dilutive securities not included in diluted net loss per common share computation	221,875

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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