Debt - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Debt Instrument [Line Items]
Amortization of deferred financing costs			$ 1,238	$ 1,212
Senior Notes \| 2032 Senior Notes
Debt Instrument [Line Items]
Contractual interest expense	$ 5,532	$ 0	5,716	0
Amortization of deferred financing costs	205	0	212	0
Total interest expense	5,737	0	5,928	0
Senior Notes \| 2029 Convertible Notes
Debt Instrument [Line Items]
Contractual interest expense	2,156	2,156	6,469	6,469
Amortization of deferred financing costs	260	242	726	714
Total interest expense	2,416	2,398	7,195	7,183
Senior Notes \| 2025 Convertible Notes
Debt Instrument [Line Items]
Contractual interest expense	204	613	1,432	1,841
Amortization of deferred financing costs	49	123	301	377
Total interest expense	253	736	1,733	2,218
Senior Notes \| 2024 Convertible Notes
Debt Instrument [Line Items]
Contractual interest expense	0	248	0	742
Amortization of deferred financing costs	0	40	0	121
Total interest expense	$ 0	$ 288	$ 0	$ 863

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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