v3.26.1
Summary of Significant Accounting Policies - Summary of Estimated Useful Lives and Residual Value of Property and Equipment (Detail)
12 Months Ended
Dec. 31, 2025
Building [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life 18 years
Residual value 5.00%
Mold And Tooling [Member]  
Property, Plant and Equipment [Line Items]  
Residual value 0.00%
Mold And Tooling [Member] | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life 2 years
Mold And Tooling [Member] | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life 5 years
Office equipment [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life 5 years
Residual value 5.00%
Electronic equipment  
Property, Plant and Equipment [Line Items]  
Residual value 5.00%
Electronic equipment | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life 3 years
Electronic equipment | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life 5 years
Machinery equipment [Member]  
Property, Plant and Equipment [Line Items]  
Residual value 5.00%
Machinery equipment [Member] | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life 5 years
Machinery equipment [Member] | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life 10 years
Transportation equipment [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life 4 years
Residual value 5.00%
Leasehold improvements [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life Shorter of lease term or the estimated useful lives of the assets
Residual value 0.00%