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Income Taxes - Schedule of Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018
Current: |  |  |
Domestic federal | $ (239) |  | $ 1,167
Foreign | 1,407 | $ 1,278 | (1,404)
Foreign withholding taxes | 201 | 94 | 356
Domestic state | (59) | 58 | 101
Total current | 1,310 | 1,430 | 220
Deferred: |  |  |
Foreign | (566) |  |
Total deferred | (566) | 0 | 0
Total provision | $ 744 | $ 1,430 | $ 220

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