INCOME TAXES - Schedule of Uncertain Tax Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Unrecognized Tax Benefits [Roll Forward]
Gross unrecognized tax benefits at the beginning of the year	$ 2,883	$ 2,985	$ 2,664
Additions from tax positions taken in the current year	183	253	330
Additions from tax positions taken in prior years	0	0	0
Reductions from tax positions taken in prior years	(24)	(355)	(9)
Gross unrecognized tax benefits at end of the year	$ 3,042	$ 2,883	$ 2,985