Note 7 - Income Taxes - Income Tax Reconciliation (Details) - USD ($)	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Provision for income tax at the statutory rate of 21%	$ (343,000)	$ (290,000)
Change in valuation allowance	(464,000)	(360,000)
Expiration of net operating loss carry forwards	526,000	427,000
Disallowed expense	281,000	223,000
Total provision for income tax	$ 0	$ 0