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Product Warranty Obligation (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2022
Mar. 31, 2021
Standard Product Warranty Accrual [Roll Forward]        
Beginning balance $ 658 $ 965 $ 707 $ 942
Warranties issued 124 66 195 189
Settlements made (92) (108) (212) (208)
Ending balance $ 690 $ 923 $ 690 $ 923