v3.26.3
Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Accounting Policies [Abstract]      
Accumulated deficit $ (728,588)   $ (608,087)
Cash in operating activities (105,257) $ (75,980)  
Cash and cash equivalents 29,812   33,180
Short-term investments $ 99,837   $ 202,522