Fair Value - Additional Information (Detail) - USD ($) |
6 Months Ended | 12 Months Ended |
---|---|---|
Jun. 30, 2020 |
Dec. 31, 2019 |
|
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
Fair value, level transfers, Amount | $ 0 | $ 0 |
Assets Measured at Fair Value on a Non-recurring Basis [Member] | ||
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
Liabilities measured at fair value on a non-recurring basis | $ 0 | $ 0 |