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Commitments and Contingencies - Insurance Proceeds Impact On Consolidated Condensed Statements Of Operation (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018
Loss Contingencies [Line Items] |  |
Cost of goods sold | $ 101,817 | $ 101,110
Loss (gain) on disposal and impairment of assets | (7,535) | (905)
Net loss | (7,506) | $ (7,170)
Balance without insurance proceeds |  |
Loss Contingencies [Line Items] |  |
Cost of goods sold | 105,448 |
Loss (gain) on disposal and impairment of assets | 820 |
Net loss | (19,492) |
Insurance recoveries |  |
Loss Contingencies [Line Items] |  |
Cost of goods sold | (3,631) |
Loss (gain) on disposal and impairment of assets | (8,355) |
Net loss | $ (11,986) |

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