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Income Taxes - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019
Valuation Allowance, Deferred Tax Asset, Change in Amount | $ 1,187 |
Undistributed Earnings of Foreign Subsidiaries | 10,300 | $ 11,000
U.S. |  |
Operating Loss Carryforwards | 0 | 2,000
Tax Credit Carryforwards | 0 | 279
State |  |
Operating Loss Carryforwards | 76 | $ 4,800
Tax Credit Carryforwards | 495 |
Unlimited carryover | 54 |
U.K. |  |
Operating Loss Carryforwards | $ 9,300 |

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