Long-Term Debt - Schedule of Interest Expense Related to Notes (Details) - 2028 and 2025 Notes - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Contractual interest expense	$ 1,425	$ 1,442
Amortization of debt discount	265	251
Amortization of issuance costs	1,281	1,217
Total interest expense related to the Notes	$ 2,971	$ 2,910