Income Taxes (Narrative) (Details) - USD ($)	Jun. 30, 2022	Jun. 30, 2021
Income Tax Disclosure [Line Items]
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	38,202,000
Operating loss carryforwards	7,199,000
State and Local Jurisdiction [Member] | Wisconsin Department of Revenue [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards, subject to expiration	12,323,000
Operating loss carryforwards	1,144,000
State and Local Jurisdiction [Member] | Other States [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards, subject to expiration	17,961,000
Operating loss carryforwards	$ 3,536,000