v3.25.2
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