Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Income Tax Disclosure [Line Items]
Interest and penalties	$ 0	$ 0
Unrecognized tax benefits	0	$ 0
Federal [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards, subject to expiration	352,000
Operating loss carryforwards, not subject to expiration	31,310,000
Operating loss carryforwards	30,777,000
State and Local Jurisdiction [Member] | Wisconsin Department of Revenue [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards, subject to expiration	15,153,000
Operating loss carryforwards	8,795,000
State and Local Jurisdiction [Member] | Other States [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards, subject to expiration	13,499,000
Operating loss carryforwards	$ 11,855,000