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Income Taxes - Schedule of Components of Income Tax Provision (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016
Current: |  |  |
Federal | $ 973 | $ (7,782) | $ (1,395)
State | 201 | (101) | 449
Foreign | 449 | 350 | 899
Current income tax provision | 1,623 | (7,533) | (47)
Deferred: |  |  |
Federal | (1,834) | 392 | 1,923
State | (247) | (515) | 47
Foreign | (89) | 223 | 360
Deferred income tax provision | (2,170) | 100 | 2,330
Total income tax provision (benefit) | $ (547) | $ (7,433) | $ 2,283

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