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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Income Tax Disclosure [Abstract]        
Income tax provision (benefit) $ 188 $ (794) $ 229 $ (2,149)
Effective tax rate     13.00% 35.00%