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Computation of Basic and Diluted Net (Loss) Income Per Share (Detail) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Disclosure Computation Of Basic And Diluted Earnings Per Share [Abstract]        
Net (loss) income $ (28,430) $ 4,401 $ (23,066) $ (59,773)
Less: undistributed earnings allocated to participating securities 0 (367) 0 0
Net (loss) income attributable to common stockholders, basic (28,430) 4,034 (23,066) (59,773)
Less: Removal of change in fair value of warrant liability 45,121 (21,245) 68,576 (4,200)
Net loss attributable to common stockholders, diluted $ (28,430) $ (17,211) $ (23,066) $ (63,973)
Weighted average common stock outstanding, basic 116,903 109,816 114,540 97,589
Effect of dilutive shares:        
Effect of dilutive warrants 0 2,157 0 988
Weighted average common stock outstanding, diluted 116,903 111,973 114,540 98,577