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Inventories (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Sep. 30, 2018
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Inventory Disclosure [Abstract] |  |
Finished goods | $ 19,713 | $ 18,802
Work in process | 5,321 | 7,926
Raw material | 55,933 | 54,290
Obsolescence reserve | (31,699) | (30,551)
Total | 49,268 | 50,467
Less current portion | (17,003) | (18,812)
Non-current portion | $ 32,265 | $ 31,655

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