LEASES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2023
Leases [Abstract]
Weighted average remaining lease term of operating leases (in years)	4 years 4 months 24 days
Weighted average discount rate of operating leases(as a percent)	3.50%
Right-of-use assets	$ 3,837		$ 4,140
ROU liabilities	4,361		4,800
Lease liabilities, current portion	1,569		1,902
Lease liabilities, non-current portion	2,792		$ 2,867
Operating lease costs	500	$ 500
Operating cash flows for operating leases paid	$ 600