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Long-Term Debt (Tables) | 9 Months Ended
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Jun. 30, 2021
Debt Disclosure [Abstract] |
Components of Long-term debt | Long-term debt consisted of the following (in thousands):
| June 30, 2021 |  | September 30, 2020
Industrial development revenue bonds | $ | 400 |  |  | $ | 800 |
Less: current portion | (400) |  |  | (400) |
Total long-term debt | $ | — |  |  | $ | 400 |

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