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Inventory (Schedule of Components of Inventory) (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Sep. 30, 2017
Inventory Disclosure [Abstract]    
Raw materials $ 14,668 $ 15,826
Work in-process 5,823 6,586
Finished goods 5,753 5,413
Inventory balance at end of period 26,244 27,825
Current portion 24,152 25,139
Non-Current portion 2,092 $ 2,686
Inventory reserve $ 500