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Income Taxes - Change In Valuation Allowance (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Changes In The Valuation Allowance For Deferred Tax Assets [Roll Forward] |  |
Valuation allowance at the beginning of the year | $ 21,138 | $ 19,929
Decreases recorded as benefits to income tax provision | (4,341) | 0
Increases recorded to income tax provision | 0 | 1,209
Valuation allowance at the end of the year | $ 16,797 | $ 21,138

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- Definition Valuation Allowance, Deferred Tax Asset, Decrease Recorded As A Benefit To Income Tax Provision, Amount + References No definition available. + Details
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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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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=116821951&loc=d3e32123-109318 + Details
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