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Income Taxes - Narrative (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Operating Loss Carryforwards [Line Items] |  |  |
Income tax expense (benefit) allocated to comprehensive income (loss) | $ 14 | $ 73 | $ 37
Tax act provisional tax benefit |  |  | $ 3,343
Net tax benefit due to Tax Cuts and Jobs Act of 2017, percent |  |  | 0.063
Valuation Allowance |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Valuation allowance and reserves | 1,284 | 1,452 | $ 148
State |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards | 21,918 | 21,575 |
Tax credit carryforward | $ 4,049 | $ 4,107 |

X
- Definition Percentage of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to Tax Cuts and Jobs Act. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
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