Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Jan. 31, 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)	401,058,973	378,452,864
Common stock, shares outstanding (in shares)	401,058,973	378,452,864