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Income Taxes - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2018
Operating Loss Carryforwards [Line Items] |  |  |
Unrecognized deferred tax liability | $ 524 |  |
Total unrecognized tax benefits | 178 | $ 774 | $ 239
Unrecognized tax benefits affecting the company's effective income tax rate |  | 748 |
Unrecognized tax benefits, interest on income taxes accrued |  | 235 |
Foreign Tax Authority |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards, valuation allowance |  | 10,100 |
Operating loss carryforwards |  | 43,800 |
Increase in valuation allowance | $ 1,500 |  |
Operating loss carryforward, indefinite |  | 30,600 |
Operating loss carryforward, expiring |  | $ 13,200 |

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- Definition Amount of tax liability from transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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