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Leases - Lease Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Leases [Abstract]        
Operating $ 810 $ 765 $ 1,626 $ 1,611
Short-term 83 214 150 373
Variable 25 28 47 62
Sublease income (48) (48) (96) (97)
Total lease costs $ 870 $ 959 $ 1,727 $ 1,949