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Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017
Tax Credit Carryforward [Line Items] |  |
Operating loss and tax credit carryforwards limitations on use minimum change in ownership percentage | 50.00% |
Maximum indefinite lived deferred tax liability as percentage of net operating loss | 8000.00% |
Valuation allowance, deferred tax asset, increase (decrease), amount | $ 1,400 |
Impact on tax provision from unrecognized tax benefits | 55 | $ 72
Domestic Tax Authority |  |
Tax Credit Carryforward [Line Items] |  |
Operating loss carryforwards | 19,700 |
State and Local Jurisdiction |  |
Tax Credit Carryforward [Line Items] |  |
Operating loss carryforwards | 3,700 |
Research Tax Credit Carryforward | Domestic Tax Authority |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforwards, research | $ 100 |

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