Earnings Per Share - Schedule of Anti-Dilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares	3 Months Ended		6 Months Ended
	Nov. 30, 2018	Nov. 30, 2017	Nov. 30, 2018	Nov. 30, 2017
Antidilutive securities excluded from computation of earnings per share	3,333,333	4,033,333	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