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2. Earnings Per Share (Details) (Equity Option [Member])	12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Equity Option [Member]
2. Earnings Per Share (Details) [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	939,375	733,375

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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