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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Income Tax Disclosure [Abstract] |  |
Deferred tax assets (liabilities), Employee benefits and deferred compensation | $ 1,040 | $ 1,035
Deferred tax assets (liabilities), Investments and asset impairments | 1,818 | 1,818
Deferred tax assets (liabilities), Other temporary differences | (871) | (674)
Deferred tax assets (liabilities), Net operating loss and capital loss carryforwards | 15,591 | 16,136
Deferred Tax Assets, Gross | 17,578 | 18,315
Valuation allowance | (17,578) | (18,315)
Net deferred tax assets |  |

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