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Intangible Assets - Summary of Intangible Assets (Detail) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Intangible asset, Gross amount $ 7,886 $ 7,599
Accumulated amortization (7,388) (7,092)
Intangible asset, Net amount 498 507
Intellectual Property Assets [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible asset, Gross amount 7,886 7,599
Accumulated amortization (7,388) (7,092)
Intangible asset, Net amount $ 498 $ 507