Balance Sheet Accounts (Tables)

3 Months Ended

Dec. 31, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Property and Equipment

The following table summarizes the Company’s major classes of property, plant and equipment:

	December 31, 2023		September 30, 2023
	(in thousands)
Land	$	2,996	$	2,996
Building	71,797		—
Research equipment	59,956		56,509
Furniture	2,761		1,540
Computers and software	883		700
Leasehold improvements	103,893		103,813
Construction in progress	136,914		166,655
	379,200		332,213
Less: Accumulated depreciation and amortization	(45,789)		(41,951)
Property, plant and equipment, net	$	333,411	$	290,262

Schedule of Accrued Expenses

Accrued expenses consist of the following:

	December 31, 2023		September 30, 2023
	(in thousands)
Accrued R&D expenses	$	18,106	$	16,125
Accrued R&D expenses; co-development	11,104		5,895
Accrued capital expenditure	11,290		14,044
Other	6,104		3,699
Total accrued expense	$	46,604	$	39,763