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Supporting Financial Information - Other Current Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Sep. 30, 2021
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Prepaid insurance and benefits | $ 416 | $ 655
Other receivables | 999 | 995
Other prepaid expenses | 3,482 | 2,615
Other current assets | $ 4,897 | $ 4,265

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