Long-Term Debt - Schedule of Maturities of Borrowing Obligations (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Sep. 30, 2025
Debt Instrument [Line Items]
2026	$ 0
2027	0
2028	180,000
2029	0
2030	0
Thereafter	0
Total before unamortized discount and issuance costs and current portion	180,000
Less: unamortized discount and issuance costs	(8,076)
Less: current portion of long-term debt	0	$ 0
Total long-term debt	171,924	$ 199,693
2028 Notes
Debt Instrument [Line Items]
2026	0
2027	0
2028	105,000
2029	0
2030	0
Thereafter	0
Total before unamortized discount and issuance costs and current portion	105,000
Less: unamortized discount and issuance costs	(1,045)
Less: current portion of long-term debt	0
Total long-term debt	103,955
2025 Modified Notes
Debt Instrument [Line Items]
2026	0
2027	0
2028	75,000
2029	0
2030	0
Thereafter	0
Total before unamortized discount and issuance costs and current portion	75,000
Less: unamortized discount and issuance costs	(7,031)
Less: current portion of long-term debt	0
Total long-term debt	$ 67,969