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Income Taxes - Deferred Tax Asset (Liability) and Related Valuation Allowance (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Income Tax Disclosure [Abstract] |  |  |  |
Allowance for doubtful accounts | $ 274 | $ 104 |  |
Unearned income | 812 | 950 |  |
Federal and state net operating losses | 23,071 | 22,367 |  |
Capital loss carryforward | 5,659 | 7,440 |  |
Accrued expenses | 1,598 | 1,781 |  |
Tax derivatives basis greater than book basis | 307 | 315 |  |
Operating lease liability | 2,295 | 2,368 |  |
Other | 271 | 321 |  |
Deferred tax assets | 34,287 | 35,646 |  |
Valuation allowance | (29,302) | (31,205) | $ (38,810) | $ (40,029)
Net deferred tax asset | 4,985 | 4,441 |  |
Prepaid expenses | (31) | (22) |  |
Investment in partnership | (487) | 0 |  |
Operating lease right-of-use assets | (2,295) | (2,368) |  |
Tax property basis less than book basis | (2,576) | (2,483) |  |
Deferred tax liabilities | (5,389) | (4,873) |  |
Net deferred tax asset (liability) | $ (404) | $ (432) |  |

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