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Leases - Lease Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Leases [Abstract]        
Operating lease cost $ 237 $ 391 $ 742 $ 1,147
Less: sublease income 0 (163) 0 (487)
Variable lease cost 31 93 84 288
Short-term lease cost 754 669 1,798 1,486
Total lease cost $ 1,022 $ 990 $ 2,624 $ 2,434