CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (Unaudited) - 3 months ended Aug. 31, 2020 - USD ($)	Series A Preferred Stock [Member] 5% Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balances at May. 31, 2020	$ 25,714	$ 939,205	$ 35,213,707	$ (39,841)	$ (21,925,732)	$ 14,213,053
Balances (in Shares) at May. 31, 2020	321,429	11,740,089
Exercise of stock options		$ 1,000	13,900			14,900
Exercise of stock options (in Shares)		12,500
Foreign currency translation				(1,721)		(1,721)
Compensation expense in connection with options granted			3,808			3,808
Net loss					(1,649,415)	(1,649,415)
Balances at Aug. 31, 2020	$ 25,714	$ 940,205	$ 35,231,415	$ (41,562)	$ (23,575,147)	$ 12,580,625
Balances (in Shares) at Aug. 31, 2020	321,429	11,752,589