Earnings Per Share - Schedule of Calculation of Anti-dilutive Earnings Per Share (Details) - shares	3 Months Ended		9 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share	4,033,333	3,333,333	3,333,333	3,333,333
Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share	3,333,333	3,333,333	3,333,333	3,333,333
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share	200,000
Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share	500,000