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, 2021	$ 984,571	38,836,743	(47,956)	(30,546,335)	9,227,023
Balances (in Shares) at May. 31, 2021	12,307,157
Foreign currency translation					(12,901)
Net loss					(2,772,023)
Balances at Feb. 28, 2022	$ 1,028,152	42,108,865	(60,857)	(33,318,358)	9,757,802
Balances (in Shares) at Feb. 28, 2022	12,851,924
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
Exercise of stock options	$ 1,600	28,985			30,585
Exercise of stock options (in Shares)	20,000
Net proceeds from ATM	$ 12,970	870,443			883,413
Net proceeds from ATM (in Shares)	162,117
Foreign currency translation			(4,750)		(4,750)
Stock option expense		314,397			314,397
Net loss				(1,125,274)	(1,125,274)
Balances at Nov. 30, 2021	$ 1,015,385	41,158,551	(58,319)	(33,214,190)	8,901,427
Balances (in Shares) at Nov. 30, 2021	12,692,327
Exercise of stock options	$ 160	4,535			4,695
Exercise of stock options (in Shares)	2,000
Net proceeds from ATM	$ 12,607	620,430			633,037
Net proceeds from ATM (in Shares)	157,597
Foreign currency translation			(2,538)		(2,538)
Stock option expense		325,349			325,349
Net loss				(104,168)	(104,168)
Balances at Feb. 28, 2022	$ 1,028,152	42,108,865	(60,857)	(33,318,358)	9,757,802
Balances (in Shares) at Feb. 28, 2022	12,851,924
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
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 (in Shares)					46,500
Foreign currency translation					$ (36,975)
Net loss					(5,347,823)
Balances at Feb. 28, 2023	$ 1,079,065	45,443,164	(110,911)	(40,425,202)	5,986,116
Balances (in Shares) at Feb. 28, 2023	13,488,313
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
Exercise of stock options	$ 2,520	62,685			65,205
Exercise of stock options (in Shares)	31,500
Net proceeds from ATM	$ 3,283	169,631			172,914
Net proceeds from ATM (in Shares)	41,012
Foreign currency translation			(8,950)		(8,950)
Stock option expense		318,230			318,230
Net loss				(1,626,088)	(1,626,088)
Balances at Nov. 30, 2022	$ 1,078,353	45,035,298	(95,413)	(38,775,343)	7,242,895
Balances (in Shares) at Nov. 30, 2022	13,479,413
Net proceeds from ATM	$ 712	24,038			24,750
Net proceeds from ATM (in Shares)	8,900
Foreign currency translation			(15,498)		(15,498)
Stock option expense		383,828			383,828
Net loss				(1,649,859)	(1,649,859)
Balances at Feb. 28, 2023	$ 1,079,065	$ 45,443,164	$ (110,911)	$ (40,425,202)	$ 5,986,116
Balances (in Shares) at Feb. 28, 2023	13,488,313