v3.26.1
Balance Sheet Components - Summary of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Sep. 30, 2025
Property, Plant, and Equipment [Line Items]    
Property and equipment, gross $ 223,596 $ 197,277
Less: Accumulated depreciation and amortization (111,708) (94,994)
Property and equipment, net 111,888 102,283
Laboratory equipment    
Property, Plant, and Equipment [Line Items]    
Property and equipment, gross 114,476 101,583
Furniture, fixtures and other equipment    
Property, Plant, and Equipment [Line Items]    
Property and equipment, gross 2,915 2,905
Vehicles    
Property, Plant, and Equipment [Line Items]    
Property and equipment, gross 211 211
Computer equipment    
Property, Plant, and Equipment [Line Items]    
Property and equipment, gross 3,470 3,176
Computer software    
Property, Plant, and Equipment [Line Items]    
Property and equipment, gross 14,438 11,009
Leasehold improvements    
Property, Plant, and Equipment [Line Items]    
Property and equipment, gross 68,538 58,277
Construction in progress    
Property, Plant, and Equipment [Line Items]    
Property and equipment, gross $ 19,548 $ 20,116