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Stock-Based Compensation - Summary of Outstanding Restricted Stock Awards and Related Activity (Detail) - Restricted Stock [Member] - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares, beginning balance 1,702 1,559
Number of shares, Granted 1,287 1,000
Number of shares, Vested (1,027) (857)
Number of shares, Canceled and forfeited (295)  
Number of shares, ending balance 1,667 1,702
Weighted average grant date fair value, beginning balance $ 4.07 $ 1.98
Weighted average grant date fair value, Granted 7.02 6.40
Weighted average grant date fair value, Vested 4.47 2.99
Number of shares, Canceled and forfeited 5.60  
Weighted average grant date fair value, ending balance $ 5.83 $ 4.07