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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares
Apr. 30, 2024
Jul. 31, 2023
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 750,000,000 750,000,000
Common stock, shares issued (in shares) 405,951,114 378,452,864
Common stock, shares outstanding (in shares) 405,951,114 378,452,864