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Income Taxes (Narrative) (Details) - USD ($) | 12 Months Ended
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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 |

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