STOCKHOLDERS’ EQUITY - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Number of Shares
Outstanding, beginning balance (in shares)	651,269	781,092	816,717
Granted (in shares)	0	0	0
Exercised (in shares)	(189,559)	(98,952)	(35,625)
Canceled (in shares)	0	(30,871)	0
Outstanding, ending balance (in shares)	461,710	651,269	781,092	816,717
Weighted- Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 7.37	$ 7.46	$ 7.42
Granted (in dollars per share)	0	0	0
Exercised (in dollars per share)	5.82	7.44	6.68
Canceled (in dollars per share)	0	9.49	0
Outstanding, ending balance (in dollars per share)	$ 8.00	$ 7.37	$ 7.46	$ 7.42
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract]
Vested and expected to vest (in shares)	461,710
Exercisable (in shares)	461,710
Vested and expected to vest, weighted-average exercise price (in dollars per share)	$ 8.00
Exercisable, weighted-average exercise price (in dollars per share)	$ 8.00
Outstanding, weighted-average remaining contractual terms (in years)	2 years 8 months 12 days	3 years 7 months 6 days	3 years 8 months 12 days	5 years 9 months 18 days
Vested and expected to vest, weighted-average remaining contractual term (in years)	2 years 8 months 12 days
Exercisable, weighted-average remaining contractual term (in years)	2 years 8 months 12 days
Outstanding, aggregate intrinsic value	$ 1,183	$ 2,185	$ 1,512	$ 9,046
Exercised, aggregate intrinsic value	976	$ 338	$ 279
Vested and expected to vest, aggregate intrinsic value	1,183
Exercisable, aggregate intrinsic value	$ 1,183