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Inventories - Schedule of Inventories (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Oct. 01, 2018 | Sep. 30, 2018
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Inventory Disclosure [Abstract] |  |  |
Raw materials and supplies | $ 3,773 |  | $ 6,202
Work-in-process | 3,669 |  | 6,626
Finished goods | 2,900 |  | 5,441
Total inventories | $ 10,342 | $ 11,727 | $ 18,269

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