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Earnings Per Share (Details Text)
3 Months Ended 6 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Nov. 30, 2012
Nov. 30, 2011
Convertible Preferred Stock
       
Antidilutive Securities 3,333,334 3,333,334 3,333,334 3,333,334
Call Option
       
Antidilutive Securities 1,940,000 350,000 1,940,000 350,000