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Earnings Per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares
3 Months Ended 9 Months Ended
Feb. 29, 2016
Feb. 28, 2015
Feb. 29, 2016
Feb. 28, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share 4,008,333 3,333,333 4,008,333 4,483,333
Options To Purchase Common Stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share 675,000 675,000 1,150,000
Preferred Stock Convertible Into Common Stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share 3,333,333 3,333,333 3,333,333 3,333,333