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Schedule of Business Insurance Recoveries (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Insurance receivable $ 191 $ 1,197  
Business interruption (176) (484)
Net property insurance claims 596 (284) (20)
Proceeds from business interruption insurance claims 384 100
Proceeds from property insurance claims 945 100 20
Accounts Receivable [Member]      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Insurance receivable $ 191 $ 1,197