Income Taxes - Consolidated Pretax Loss from Continuing Operations (Detail) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Income Tax Disclosure [Abstract] | ||
| United States | $ (205,175) | $ (142,305) |
| Loss before income tax | $ (205,175) | $ (142,305) |