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Earnings (Loss) Per Share (Narrative) (Details) (Preferred Stock [Member])	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities that are not included in the diluted net loss calculation	278,539	1,666,667	1,666,667
Convertible preferred stock, shares of common stock issued upon conversion		1

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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