LEASES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Sep. 30, 2023
Leases [Abstract]
Weighted average remaining lease term of operating leases (in years)	4 years 10 months 24 days		4 years 10 months 24 days
Weighted average discount rate of operating leases (as a percent)	2.80%		2.80%
Right-of-use assets	$ 2,848		$ 2,848	$ 4,140
ROU liabilities	3,156		3,156	4,800
Lease liabilities, current portion, rounded	800		800
Lease liabilities, non-current portion	2,409		2,409	2,867
Lease liabilities, current portion	747		747	$ 1,902
Operating lease costs	$ 600	$ 500	1,500
Operating cash flows for operating leases paid			$ 1,700