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Fair Value Measurements (Details) - USD ($)
$ in Thousands
9 Months Ended
Jun. 30, 2021
Sep. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, Fair Value Disclosure $ 945 $ 766
Financial and Nonfinancial Liabilities, Fair Value Disclosure (814) (644)
Business Combination, Contingent Consideration, Liability, Noncurrent (4,147)  
Fair Value, Net Asset (Liability) 4,016 (122)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings (73)  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements (4,074)  
Fair Value, Inputs, Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, Fair Value Disclosure 945 766
Financial and Nonfinancial Liabilities, Fair Value Disclosure (814) (644)
Fair Value, Net Asset (Liability) (131) (122)
Fair Value, Inputs, Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Business Combination, Contingent Consideration, Liability, Noncurrent (4,147)  
Fair Value, Net Asset (Liability) $ (4,147) $ 0