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Product Warranties (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Payables and Accruals [Abstract]    
Balance at the beginning of the period $ 105 $ 108
Accruals for warranties for products sold in the period 7 34
Fulfillment of warranty obligations (34) (37)
Balance at the end of the period $ 78 $ 105