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, 2022	$ 1,029,000	$ 42,447,000	$ (74,000)	$ (35,077,000)	$ 8,325,000
Balance, shares at May. 31, 2022	12,867,924
Foreign currency translation			(13,000)		(13,000)
Share-based compensation		304,000			304,000
Net loss				(2,072,000)	(2,072,000)
Exercise of stock options	$ 1,000	13,000			14,000
Exercise of stock options, shares	15,000
Net proceeds from ATM	$ 42,000	1,722,000			1,764,000
Net proceeds from ATM, shares	523,977
Balances at Aug. 31, 2022	$ 1,072,000	44,486,000	(87,000)	(37,149,000)	8,322,000
Balance, shares at Aug. 31, 2022	13,406,901
Balances at May. 31, 2022	$ 1,029,000	42,447,000	(74,000)	(35,077,000)	8,325,000
Balance, shares at May. 31, 2022	12,867,924
Foreign currency translation					(37,000)
Net loss					(5,348,000)
Balances at Feb. 28, 2023	$ 1,079,000	45,445,000	(111,000)	(40,425,000)	5,988,000
Balance, shares at Feb. 28, 2023	13,488,313
Balances at Aug. 31, 2022	$ 1,072,000	44,486,000	(87,000)	(37,149,000)	8,322,000
Balance, shares at Aug. 31, 2022	13,406,901
Foreign currency translation			(9,000)		(9,000)
Share-based compensation		318,000			318,000
Net loss				(1,626,000)	(1,626,000)
Exercise of stock options	$ 3,000	63,000			66,000
Exercise of stock options, shares	31,500
Net proceeds from ATM	$ 3,000	170,000			173,000
Net proceeds from ATM, shares	41,012
Balances at Nov. 30, 2022	$ 1,078,000	45,037,000	(96,000)	(38,775,000)	7,244,000
Balance, shares at Nov. 30, 2022	13,479,413
Foreign currency translation			(15,000)		(15,000)
Share-based compensation		384,000			384,000
Net loss				(1,650,000)	(1,650,000)
Net proceeds from ATM	$ 1,000	24,000			25,000
Net proceeds from ATM, shares	8,900
Balances at Feb. 28, 2023	$ 1,079,000	45,445,000	(111,000)	(40,425,000)	5,988,000
Balance, shares at Feb. 28, 2023	13,488,313
Balances at May. 31, 2023	$ 1,346,000	52,705,000	(110,000)	(42,217,000)	11,724,000
Balance, shares at May. 31, 2023	16,821,646
Foreign currency translation			6,000		6,000
Share-based compensation		170,000			170,000
Net loss				(1,132,000)	(1,132,000)
Balances at Aug. 31, 2023	$ 1,346,000	52,875,000	(104,000)	(43,349,000)	10,768,000
Balance, shares at Aug. 31, 2023	16,821,646
Balances at May. 31, 2023	$ 1,346,000	52,705,000	(110,000)	(42,217,000)	11,724,000
Balance, shares at May. 31, 2023	16,821,646
Foreign currency translation					8,000
Net loss					(4,557,000)
Balances at Feb. 29, 2024	$ 1,346,000	53,338,000	(102,000)	(46,774,000)	7,808,000
Balance, shares at Feb. 29, 2024	16,821,646
Balances at Aug. 31, 2023	$ 1,346,000	52,875,000	(104,000)	(43,349,000)	10,768,000
Balance, shares at Aug. 31, 2023	16,821,646
Foreign currency translation
Share-based compensation		122,000			122,000
Net loss				(1,507,000)	(1,507,000)
Balances at Nov. 30, 2023	$ 1,346,000	52,997,000	(104,000)	(44,856,000)	9,383,000
Balance, shares at Nov. 30, 2023	16,821,646
Foreign currency translation			2,000		2,000
Share-based compensation		341,000			341,000
Net loss				(1,918,000)	(1,918,000)
Balances at Feb. 29, 2024	$ 1,346,000	$ 53,338,000	$ (102,000)	$ (46,774,000)	$ 7,808,000
Balance, shares at Feb. 29, 2024	16,821,646