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Income Taxes - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Income Tax [Line Items] |  |
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent | 4.74% | 4.74%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent | 25.74% | 25.74%
Valuation Allowance, Deferred Tax Asset, Change in Amount | $ (3,095) | $ (4,217)
Deferred Tax Assets, Valuation Allowance | 52,910 | $ 49,815
Operating Loss Carryforwards | 188,600 |
Operating Loss Carryforwards Expire Date |  | 2037
Income Tax Expense (Benefit) | $ 0 | $ 0
Scenario, Plan [Member] |  |
Income Tax [Line Items] |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 21.00%

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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