Note 12 - Income Taxes - Reconciliation Schedule of Federal Income Tax Benefits (Details) - USD ($)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Expected income tax benefit at statutory rate	$ (724,000)	$ (955,000)
State taxes, net of federal benefit	(126,000)	(166,000)
RTP – Excess Business Interest	115,000	(103,000)
Permanent differences and other	8,000	9,000
Expiration of net operating allowances	802,000	71,000
Change in valuation allowance	(75,000)	1,144,000
Income tax benefit