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Defined Benefit Pension Plan (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Retirement Benefits [Abstract]    
Interest cost $ 132 $ 107
Expected return on plan assets (235) (194)
Amortization of prior service cost 5 5
Total net periodic (benefit) $ (98) $ (82)