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Income Taxes (Narrative) (Details) - USD ($) | Jun. 30, 2022 | Jun. 30, 2021
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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 |

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