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Computation of Basic and Diluted Net Loss Per Share (Detail) - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure Computation Of Basic And Diluted Earnings Per Share [Abstract]      
Net income (loss) $ 76,713 $ (75,240) $ (152,600)
Less: undistributed earnings allocated to participating securities (4,569) 0 0
Less: preferred stock deemed dividend 0 0 (3,267)
Net income (loss) allocable to common stockholders, basic 72,144 (75,240) (155,867)
Add: undistributed earnings allocated to Series B and warrants 4,569 0 0
Less: undistributed earnings allocated to Series B and warrants (4,190) 0 0
Add: interest expense on convertible notes 3,168 0 0
Less: removal of change in fair value of warrant liability 49,354 (4,124) 7,500
Net income (loss) allocable to common stockholders, diluted $ 75,691 $ (79,364) $ (155,867)
Weighted average shares used to compute basic net loss per share allocable to common stockholders 116,264 100,753 72,024
Stock-based compensation expense $ 3,075
Convertible Notes (as converted to common stock) 13,667
Effect of dilutive warrants 751
Weighted average shares used to compute net loss allocable to common stockholders per share, diluted 133,006 101,504 72,024