CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balances at May. 31, 2021	$ 984,571	$ 38,836,743	$ (47,956)	$ (30,546,335)	$ 9,227,023
Balances (in Shares) at May. 31, 2021	12,307,157
Exercise of stock options	$ 120	3,775			3,895
Exercise of stock options (in Shares)	1,500
Net proceeds from ATM	$ 16,124	784,586			800,710
Net proceeds from ATM (in Shares)	201,553
Foreign currency translation			(5,613)		(5,613)
Stock option expense		319,622			319,622
Net loss				(1,542,581)	(1,542,581)
Balances at Aug. 31, 2021	$ 1,000,815	39,944,726	(53,569)	(32,088,916)	8,803,056
Balances (in Shares) at Aug. 31, 2021	12,510,210
Balances at May. 31, 2022	$ 1,029,432	42,446,597	(73,936)	(35,077,379)	8,324,714
Balances (in Shares) at May. 31, 2022	12,867,924
Exercise of stock options	$ 1,200	12,750			13,950
Exercise of stock options (in Shares)	15,000
Net proceeds from ATM	$ 41,918	1,721,650			1,763,568
Net proceeds from ATM (in Shares)	523,977
Foreign currency translation			(12,527)		(12,527)
Stock option expense		303,755			303,755
Net loss				(2,071,876)	(2,071,876)
Balances at Aug. 31, 2022	$ 1,072,550	$ 44,484,752	$ (86,463)	$ (37,149,255)	$ 8,321,584
Balances (in Shares) at Aug. 31, 2022	13,406,901