Income Taxes - Additional Information (Detail) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
|
Income Taxes [Line Items] | ||||
Effective tax rate | (0.04%) | 0.20% | (1.00%) | (0.60%) |
Net unrecognized tax benefits which would impact effective tax rate if recognized | $ 1.0 | $ 1.0 | ||
Earliest Tax Year | ||||
Income Taxes [Line Items] | ||||
Open tax year | 2015 | |||
Latest Tax Year | ||||
Income Taxes [Line Items] | ||||
Open tax year | 2018 | |||
Minimum | Subsidiaries | ||||
Income Taxes [Line Items] | ||||
Effective tax rate | 0.00% | |||
Maximum | Subsidiaries | ||||
Income Taxes [Line Items] | ||||
Effective tax rate | 32.00% |