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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        
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        
Shares issued in connection with public offering
Foreign currency translation (13,000) (13,000)
Share-based compensation 304,000 304,000
Net loss (2,072,000) (2,072,000)
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, 2023 $ 1,346,000 52,705,000 (110,000) (42,217,000) 11,724,000
Balance, shares at May. 31, 2023 16,821,646        
Exercise of stock options
Exercise of stock options, shares        
Net proceeds from ATM
Shares issued in connection with public offering
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