Note 8 - Leases - Other Information Related to Operating Leases (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating cash flows from operating leases	$ 196	$ 190
Weighted average remaining lease term (in years) (Year)	4 years 1 month 6 days	4 years 10 months 24 days
Weighted average discount rate	3.25%	3.25%