Note 8 - Leases - Other Information Related to Operating Leases (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating cash flows from operating leases	$ 123	$ 119
Weighted average remaining lease term (in years) (Year)	4 years 3 months 18 days	5 years 1 month 6 days
Weighted average discount rate	3.25%	3.25%