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Stockholders' Equity - Activity under Plans (Detail) - 2020 Equity Incentive Plan [Member] - $ / shares
 9 Months Ended 12 Months Ended
Sep. 30, 2024
Dec. 31, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Number of Shares, Outstanding, beginning of period 499,442  
Number of Shares, Forfeited (47,454)  
Number of Shares, Expired (4,840)  
Number of Shares, Outstanding, end of period 447,148 499,442
Number of Shares, Vested and expected to vest 446,784 498,921
Number of Shares, Options exercisable 446,928 495,428
Number of Shares, Outstanding, Weighted Average Exercise Price, beginning of period $ 101.82  
Number of Shares, Forfeited, Weighted Average Exercise Price 86.73  
Number of Shares, Expired, Weighted Average Exercise Price 36  
Number of Shares, Outstanding, Weighted Average Exercise Price, end of period 104.13 $ 101.82
Number of Shares,Vested and expected to vest, Weighted Average Exercise Price, end of period 104.13 101.80
Number of Shares, Options exercisable, Weighted Average Exercise Price, end of period $ 104.13 $ 101.59
Number of Shares, Outstanding, Weighted Average Remaining Contractual Term (years) 4 years 4 years 7 months 6 days
Number of Shares, Vested and expected to vest, Weighted Average Remaining Contractual Term (years) 4 years 4 years 7 months 6 days
Number of Shares, Options exercisable, Weighted Average Remaining Contractual Term (years) 4 years 4 years 7 months 6 days