Note 2 - Significant Accounting Policies (Details Textual) - USD ($) shares in Thousands	3 Months Ended			6 Months Ended
	Jan. 31, 2024	Oct. 31, 2023	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023	Jul. 31, 2023
Common Stock to be Issued	$ 55,000			$ 55,000		$ 30,000
Operating Expenses	$ 26,916		$ 25,751	$ 85,736	$ 77,403
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	0				0
Revision of Prior Period, Error Correction, Adjustment [Member]
Common Stock to be Issued		$ (8,000)
Operating Expenses		$ 8,000