Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED BALANCE SHEETS (Parenthetical)

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
Aug. 31, 2023
Aug. 31, 2022
SHAREHOLDERS' EQUITY:    
Common stock, par value (in dollars per share) $ 0.003 $ 0.003
Common stock, shares authorized (in shares) 40,000,000.0 40,000,000.0
Common stock, shares outstanding (in shares) 24,078,720 23,980,645
Series B Preferred Stock [Member]    
SHAREHOLDERS' EQUITY:    
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized (in shares) 25,000,000 25,000,000
Preferred stock, shares issued (in shares) 432,513 432,513
Preferred stock, shares outstanding (in shares) 432,513 432,513
Liquidation preference $ 432,513 $ 432,513