Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Jan. 31, 2024	Jul. 31, 2023
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.001	$ 0.001
Preferred Stock, Shares Authorized (in shares)	50,000,000	50,000,000
Preferred Stock, Shares Issued (in shares)	0	0
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.001	$ 0.001
Common Stock, Shares Authorized (in shares)	250,000,000	250,000,000
Common Stock, Shares, Outstanding (in shares)	93,301,023	89,059,357
Common Stock, Shares, Issued (in shares)	93,301,023	89,059,357
Common Stock, Shares, Outstanding (in shares)	93,301,023	89,059,357
Common Stock, Shares, Issued (in shares)	93,301,023	89,059,357