LEASES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024	Sep. 30, 2024
Leases [Abstract]
Weighted average remaining lease term of operating leases (in years)	4 years 7 months 6 days		4 years 7 months 6 days
Weighted average discount rate of operating leases (as a percent)	8.00%		8.00%
Right-of-use assets	$ 2,469		$ 2,469		$ 4,662
ROU liabilities	2,872		2,872		5,000
Lease liabilities, current portion	699		699		805
Lease liabilities, non-current portion	2,173		2,173		$ 4,230
Operating lease costs	$ 200	$ 400	400	$ 900
Operating cash flows for operating leases paid			$ 300