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Inventories (Tables) | 12 Months Ended
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Sep. 30, 2020
Inventory Disclosure [Abstract] |
Inventories | Inventories consisted of the following (in thousands):
|  | AS OF SEPTEMBER 30, |
|  | 2020 |  |  | 2019 |
Finished goods |  | $ | 20,798 |  |  | $ | 17,967 |
Work in process |  |  | 984 |  |  |  | 3,681 |
Raw materials |  |  | 47,041 |  |  |  | 55,781 |
Obsolescence reserve |  |  | (34,960 | ) |  |  | (32,050 | )
|  |  | 33,863 |  |  |  | 45,379 |
Less current portion |  |  | 16,933 |  |  |  | 23,855 |
Non-current portion |  | $ | 16,930 |  |  | $ | 21,524 |

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