DEBT - Schedule of long-term debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
DEBT
Total debt before unamortized debt issuance costs	$ 405,289	$ 389,142
Total debt, net of unamortized debt issuance costs	(11,950)	(11,397)
Total	393,339	377,745
Less: Current portion	(3,538)	(7,950)
Total Long-term debt	$ 389,801	$ 369,795
Term Loan
DEBT
Effective interest rate (percent)	11.39%	10.41%
New Delayed Draw Term Loan
DEBT
Effective interest rate (percent)	11.50%	10.57%
Delayed Draw Term Loan
DEBT
Effective interest rate (percent)	11.37%	10.41%
Seller Note - Bolder BioPATH
DEBT
Total debt before unamortized debt issuance costs	$ 376	$ 602
Seller Note - Pre-Clinical Research Services
DEBT
Total debt before unamortized debt issuance costs	464	541
Seller Payable Orient Bio Resource Center
DEBT
Total debt before unamortized debt issuance costs	3,700	3,649
Seller Note - Histion
DEBT
Total debt before unamortized debt issuance costs	84	229
Seller Note - Protypia
DEBT
Total debt before unamortized debt issuance costs	0	400
EIDL Loan
DEBT
Total debt before unamortized debt issuance costs	0	140
Second Lien Notes
DEBT
Total debt before unamortized debt issuance costs	17,846	0
Convertible Senior Notes
DEBT
Total debt before unamortized debt issuance costs	109,979	110,651
Total debt, net of unamortized debt issuance costs	(3,031)	(4,172)
Term Loan Facility, Initial DDTL and Incremental Term Loans
DEBT
Total debt before unamortized debt issuance costs	$ 272,840	$ 272,930