DEBT - Significant Transactions Narrative (Details) - USD ($)			12 Months Ended
	Sep. 13, 2024	Oct. 12, 2022	Sep. 30, 2024	Sep. 30, 2023	Nov. 27, 2021
DEBT
Long-term debt, Carrying value			$ 393,339,000	$ 377,745,000
Gain (loss) on extinguishment of debt			$ 1,860,000	$ 0
Convertible Senior Notes
DEBT
Debt, principal amount					$ 140,000,000
the Purchasers
DEBT
Shares to be purchased (in shares)	3,946,250
the Purchasers | Senior Secured Second Lien PIK Notes Due 2027 | Secured Debt
DEBT
Cash proceeds from debt acquired	$ 17,000,000
the Purchasers | Convertible Senior Notes | Convertible Debt
DEBT
Debt acquired	8,333,000
Annual interest rate					3.25%
Long-term debt, Carrying value	131,667
Gain (loss) on extinguishment of debt	$ 1,860,000
Structuring Agent
DEBT
Shares to be purchased (in shares)	200,000
Structuring Agent | Senior Secured Second Lien PIK Notes Due 2027 | Secured Debt
DEBT
Debt, principal amount	$ 550,000
New Delayed Draw Term Loan
DEBT
Borrowings on delayed draw term loan		$ 35,000,000
Revolving Credit Facility
DEBT
Repayments of long-term debt		$ 15,000,000