| Income Taxes - Unrecognized Tax Benefits (Details) $ in Thousands | Sep. 30, 2020  USD ($) | 
|---|---|
| Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | |
| Balance, December 31, 2019 | $ 400 | 
| Balance, September 30, 2020 | $ 400 | 
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available. 
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- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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