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Income (Loss) Per Share - Summary of Basic and Diluted Net (Loss) Income per Common Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Numerator:        
Net (loss) income $ (4,517) $ (119) $ (11,899) $ 4,071
Denominator:        
Weighted average number of common shares - basic 81,071 56,339 78,560 54,636
Effect of dilutive securities- share-based employee options and awards       1,120
Weighted average number of common shares - diluted 81,071 56,339 78,560 55,756
Antidilutive options and awards 4,535 2,479 4,535 650
Net (loss) income per common share:        
Basic $ (0.06) $ 0.00 $ (0.15) $ 0.07
Diluted $ (0.06) $ 0.00 $ (0.15) $ 0.07