Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended		24 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024
Income Tax Disclosure [Line Items]
Uncertainty tax position related to research and development costs	$ 28,000	$ 25,000	$ 28,000
Operating loss carryforwards	32,778,000		32,778,000
Interest and penalties			0
Unrecognized tax benefits	0		0
Income Tax Expense (Benefit)	(73,604)	317,377
Federal tax benefit	(81,278)	230,139
Wisconsin Department of Revenue [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards	4,381,000		4,381,000
Federal [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards, not subject to expiration	32,778,000		32,778,000
Operating loss carryforwards	1,270,000	6,944,000	1,270,000
Income Tax Expense (Benefit)	230,139
Research and development tax credits including carryovers		$ 132,466
State and Local Jurisdiction [Member]
Income Tax Disclosure [Line Items]
Income Tax Expense (Benefit)	87,238
State and Local Jurisdiction [Member] | Wisconsin Department of Revenue [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards, subject to expiration	11,242,000		11,242,000
State and Local Jurisdiction [Member] | Other States [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards, subject to expiration	15,910,000		$ 15,910,000
Minimum [Member] | State and Local Jurisdiction [Member]
Income Tax Disclosure [Line Items]
Income Tax Expense (Benefit)	$ 7,674