Commitments and Contingencies - Summary of Tenant Improvement Allowances Included in Accounts Payable and Other Liabilities (Detail) - USD ($) $ in Thousands |
Jun. 30, 2020 |
Dec. 31, 2019 |
Jun. 30, 2019 |
|---|---|---|---|
| Loss Contingencies [Line Items] | |||
| Tenant improvement allowances | $ 1,727 | ||
| Accounts Payable And Other Liabilities | |||
| Loss Contingencies [Line Items] | |||
| Tenant improvement allowances | $ 2,208 | $ 2,706 |