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Other Income (Narrative) (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Other Income [Line Items] |  |  |  |  |  |
Proceeds from Insurance Settlement, Investing Activities |  |  |  |  | $ 272,000 |
Other income (expense) |  | $ 31,000 |  | $ 2,000 | $ 303,000 |
Tower in Des Moines Iowa [Member] |  |  |  |  |  |
Other Income [Line Items] |  |  |  |  |  |
Proceeds from Insurance Settlement, Investing Activities | $ 290,000 |  | $ 250,000 |  |  |
Other income (expense) | $ 290,000 |  | $ 250,000 |  |  | $ 540,000

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