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Stock-Based Compensation - Restricted Stock Unit Activity (Detail) - 2014 Equity Incentive Plan [Member] - Employees And Non-Employee Members Of Board Of Directors [Member] - Restricted Stock Units - $ / shares
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Number of Units      
Outstanding, Beginning Balance 47,194    
Awarded 75,323    
Vested and released (31,170)    
Forfeited (11,434)    
Outstanding, Ending Balance 79,913 47,194  
Weighted Average Grant Date Fair Value      
Weighted-average grant date fair value, outstanding, Beginning Balance $ 111.24    
Weighted-average grant date fair value, awarded 7.92 $ 93.72 $ 121.2
Weighted-average grant date fair value, vested and released 96.24    
Weighted-average grant date fair value, forfeited 126.84    
Weighted-average grant date fair value, outstanding, Ending Balance $ 17.51 $ 111.24