Earnings Per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares	3 Months Ended		9 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share	3,333,333	4,008,333	3,333,333	4,008,333
Options To Purchase Common Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share		675,000		675,000
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