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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Amount        
Federal statutory income tax expense $ 895 $ 158 $ 3,187 $ 2,057
State income taxes, net of federal benefit 116 39 416 349
Permanent differences 20 36 127 78
Tax credits (209) (228) (979) (680)
Other 246 0 164 0
Total income tax expense $ 1,068 $ 5 $ 2,915 $ 1,804
Effective Income Tax Rate Reconciliation, Percent [Abstract]        
Federal statutory income tax expense 21.00% 21.00% 21.00% 21.00%
State income taxes, net of federal benefit 2.70% 5.20% 2.70% 3.60%
Permanent differences 0.005 0.048 0.008 0.008
Tax credits (4.90%) (30.20%) (6.50%) (6.90%)
Other 5.80% 0.00% 1.10% 0.00%
Total income tax expense 25.10% 0.70% 19.20% 18.40%