Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Jul. 31, 2023	Jul. 31, 2022
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, Issued (in shares)	93,809,357	87,509,357
Common Stock, Shares, Outstanding (in shares)	89,059,357	82,509,357
Common Stock, Shares, Outstanding (in shares)	89,059,357	82,509,357