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Inventories - Narrative (Details) - USD ($) $ in Millions | Jun. 30, 2019 | Sep. 30, 2018
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Inventory Disclosure [Abstract] |  |
Finished goods inventory that has been shipped, but for which all revenue recognition criteria has not been met | $ 0.8 | $ 0.7
Reserve for obsolescence | $ 3.7 | $ 3.3

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- Definition Amount of finished goods inventory that has been shipped, but for which all revenue recognition criteria has not been met. + References No definition available. + Details
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