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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Sep. 30, 2025
Accounting Policies [Abstract]  
Summary of Cash and Cash Equivalents
September 30,
(in thousands)20252024
Cash and cash equivalents$183,049 $226,316 
Restricted cash, non-current2,376 2,816 
Total cash, cash equivalents and restricted cash$185,425 $229,132 
The following table sets forth the cash and cash equivalents, and investments as of September 30, 2025:
(in thousands)Amortized costGross unrealized gainsGross unrealized lossesFair value
Cash$32,677 $— $— $32,677 
Cash equivalents - money market funds150,372 — — 150,372 
Total cash and cash equivalents$183,049 $— $— $183,049 
Short-term investments:
U.S. government treasury bills$49,316 $69 $— $49,385 
Total short-term investments$49,316 $69 $— $49,385 
Total cash, cash equivalents and short-term investments$232,365 $69 $— $232,434 
The following table sets forth the cash and cash equivalents, and investments as of September 30, 2024:
(in thousands)Amortized costGross unrealized gainsGross unrealized lossesFair value
Cash$26,458 $— $— $26,458 
Cash equivalents - money market funds199,858 — — 199,858 
Total cash and cash equivalents$226,316 $— $— $226,316 
Short-term investments:
U.S. government treasury bills$49,964 $119 $— $50,083 
Total short-term investments$49,964 $119 $— $50,083 
Total cash, cash equivalents and short-term investments$276,280 $119 $— $276,399 
Summary of Restrictions on Cash and Cash Equivalents
September 30,
(in thousands)20252024
Cash and cash equivalents$183,049 $226,316 
Restricted cash, non-current2,376 2,816 
Total cash, cash equivalents and restricted cash$185,425 $229,132 
Summary of Estimated Lives of Property And Equipment
Estimated lives of property and equipment are as follows:
Laboratory equipment5 Years
Furniture, fixtures and other equipment5 Years
Computer equipment3 Years
Vehicles 5 Years
Computer software3 Years
Leasehold improvementsLesser of useful life or lease term