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Income Taxes - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Income Tax Disclosure [Line Items]        
Income tax benefit (expense) $ 0 $ 0 $ 50,000 $ 0
Effective tax rate 0.00% 0.00% 0.60% 0.00%
Maximum [Member]        
Income Tax Disclosure [Line Items]        
Income tax benefit (expense)     $ 100,000