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Computation of Basic and Diluted Net Income (Loss) Per Share (Detail) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Disclosure Computation Of Basic And Diluted Earnings Per Share [Abstract]        
Net income (loss) $ 4,473 $ (51,579) $ 5,364 $ (64,174)
Less: undistributed earnings allocated to participating securities (333)   (410)  
Net income (loss) attributable to common stockholders, basic 4,140 (51,579) 4,954 (64,174)
Less: Removal of change in fair value of warrant liability (2,097) 25,655 23,455 17,045
Net income (loss) attributable to common stockholders, diluted $ 2,043 $ (51,579) $ 4,954 $ (64,174)
Weighted average common stock outstanding, basic 114,629 97,339 113,339 91,408
Effect of dilutive shares:        
Stock-based compensation plans 1,630   1,639  
Effect of dilutive warrants 2,571      
Weighted average common stock outstanding, diluted 118,830 97,339 114,978 91,408