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Share-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Recognized share-based compensation awards $ 900 $ 500 $ 2,400 $ 1,200
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period     2,000 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value     $ 3,000  
Number of Options, Granted 0     1,200,000
Weighted-average fair value of stock options granted   $ 1.98   $ 1.98
Weighted-average risk free interest rate   0.30%   0.30%
Weighted-average expected term   5 years   5 years
Weighted-average volatility rate   52.50%   52.50%
Non-Employee Director [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Cash received from employee stock option exercised     $ 13,000  
Restricted Stock Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of restricted stock awards granted 5,000 144,000 465,000 648,000
Weighted-average fair value of restricted stock unit granted     $ 8.50 $ 6.35