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Earnings Per Share (Details Text)
3 Months Ended 9 Months Ended
Feb. 28, 2013
Feb. 29, 2012
Feb. 28, 2013
Feb. 29, 2012
Convertible Preferred Stock
       
Antidilutive Securities 3,333,334 3,333,334 3,333,334 3,333,334
Call Option
       
Antidilutive Securities 1,940,000 1,940,000 350,000 350,000