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Supporting Financial Information - Other Income (Expense) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |  |  |
Document Fiscal Year Focus |  |  | 2017 |  |
Interest expense, net | $ (219) | $ (206) | $ (662) |  | $ (206)
Amortization of deferred financing costs | (70) | (50) | (194) | $ 0 | (50)
Increase (Decrease) in Derivative Assets and Liabilities | 3 | 0 | (49) |  |
Other income (expense), net | 17 | (118) | 17 |  | $ (820)
Other income (expense) net | $ (269) | $ (374) | $ (888) | $ (1,076) |

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