Leases - Right of use assets and lease liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
Assets [Abstract]
Operating leases, net	$ 1,647	$ 489
Lease receivable - current	41	14
Lease receivable - noncurrent	45	11
Total lease receivable	86	25
Liabilities
Current operating lease liabilities	$ 340	$ 382
Current operating lease liabilities, Statement of Financial Position	Accounts payable and accrued expenses	Accounts payable and accrued expenses
Non-current operating lease liabilities	$ 1,336	$ 117
Non-current operating lease liabilities, Statement of Financial Position	Non-current operating lease liabilities	Non-current operating lease liabilities
Total operating lease liabilities	$ 1,676	$ 499