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Supporting Financial Information - Other Income (Expense) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2017 | Mar. 31, 2016 | Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |  |  |
Document Fiscal Year Focus |  |  | 2017 |  |
Interest income (expense), net | $ (215) | $ 0 | $ (440) |  | $ 0
Amortization of deferred financing costs | (67) | 0 | (127) | $ 0 | 0
Increase (Decrease) in Derivative Assets and Liabilities | 27 | 0 | (52) |  |
Other income (expense), net |  | (127) | 0 |  | $ (702)
Other income (expense) net | $ (255) | $ (127) | $ (619) | $ (702) |

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