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Supporting Financial Information - Other Current Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Sep. 30, 2018
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Prepaid insurance and benefits | $ 737 | $ 401
Other receivables and prepaid expenses | 772 | 359
Other current assets | $ 1,509 | $ 760

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