Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Oct. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease, renewal term	5 years			5 years
Operating lease cost	$ 87	$ 95		$ 261	$ 283
Short-term lease cost	0	0		0	0
Total lease cost	87	95		$ 261	283
Operating cash flows from operating leases	$ 79	$ 87	$ 234		$ 261
Weighted average remaining lease term-operating leases	6 years 10 months 24 days	7 years 10 months 24 days		6 years 10 months 24 days	7 years 10 months 24 days	6 years 10 months 24 days	7 years 10 months 24 days
Weighted average discount rate-operating leases	2.34%	2.25%		2.34%	2.25%	2.34%	2.25%
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term								2 years
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term								8 years