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The Company and Significant Accounting Policies - Summary of Non-Vested Restricted Stock Units Granted (Detail) - Restricted Stock Units
shares in Thousands
6 Months Ended
Jun. 30, 2021
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Number Granted | shares 85
Weighted Average Fair Value | $ / shares $ 4.69