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Stock-Based Awards - Summary of Unrecognized Stock-Based Compensation Expense and Average Remaining Vesting Period (Detail) - Employees and Directors [Member]
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Weighted Average Remaining Vesting Period 1 year 3 months 10 days
Unrecognized Stock-Based Compensation $ 9,776