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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Income Taxes [Line Items] |  |
Net operating loss carryforwards | $ 43,100 | $ 39,300
Accrued interest payable related to uncertain tax positions | 159 | $ 136
Undistributed earnings of domestic subsidiaries | 35,100 |
Additional taxes if interest in all businesses is sold rather than to effect a tax-free liquidation | $ 8,400 |
Maximum [Member] |  |
Income Taxes [Line Items] |  |
Net operating losses expiration year | 2039 |
Minimum [Member] |  |
Income Taxes [Line Items] |  |
Net operating losses expiration year | 2024 |

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