Accounts payable and Other noncurrent liabilities - Agreements with Vendors (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Sep. 30, 2024
Accounts payable and other noncurrent liabilities
Accounts payable and accrued expenses	$ 12,568	$ 12,084
Other noncurrent liabilities	2,099	1,614
Vendor Agreement
Accounts payable and other noncurrent liabilities
Current	2,129	2,553
Less: discount	(265)	(244)
Accounts payable and accrued expenses	1,864	2,309
Noncurrent	2,159	1,677
Less: discount	(101)	(146)
Other noncurrent liabilities	$ 2,058	$ 1,531