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Income Taxes - Schedule of Income Before Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Income Tax Disclosure [Abstract]      
U.S. $ 11,859 $ (2,103) $ (19,932)
Other than U.S. 475 (5,596) 3,013
Income (loss) before income taxes $ 12,334 $ (7,699) $ (16,919)