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Earning Per Share (Details Textual)	3 Months Ended
Earning Per Share (Details Textual)	Aug. 31, 2013	Aug. 31, 2012
Earning Per Share (Textual)
Antidilutive Securities excluded from computation of earnings per share, Amount	12,300	13,500

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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