Note 8 - Leases - Other Information Related to Operating Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating cash flows from operating leases	$ 270	$ 262
Weighted average remaining lease term (Year)	3 years 10 months 24 days	4 years 8 months 12 days
Weighted average discount rate	3.25%	3.25%