Leases - Components of lease costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Operating Lease:
Total lease costs	$ 582	$ 565
Total lease costs, net of sublease interest income	573	562
Selling, general and administrative
Operating Lease:
Operating lease cost	509	531
Short-term lease cost	73	34
Revenue
Operating Lease:
Less sublease interest income	(9)	(3)
Sales | Product
Operating Lease:
Sales-Type Lease, Revenue	100	20
Cost of sales | Product
Operating Lease:
Sales-Type Lease, Cost of Sales	$ 86	$ 10