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Computation of Basic and Diluted Net Income (Loss) Per Share (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disclosure Computation Of Basic And Diluted Earnings Per Share [Abstract]
Net income (loss)	$ 891	$ (12,595)
Less: undistributed earnings allocated to participating securities	(70)
Net income (loss) attributable to common stockholders, basic	821	(12,595)
Less: Removal of change in fair value of warrant liability	25,552	(8,610)
Net income (loss) attributable to common stockholders, diluted	$ 821	$ (21,205)
Weighted average common stock outstanding, basic	112,035	85,477
Effect of dilutive shares:
Stock-based compensation plans	1,434
Effect of dilutive warrants		171
Weighted average common stock outstanding, diluted	113,469	85,648

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