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Inventory (Schedule of Components of Inventory) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Sep. 30, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 11,951 $ 11,857
Work in-process 5,515 5,402
Finished goods 4,415 5,024
Inventory balance at end of period 21,881 22,283
Current portion 20,466 20,850
Non-Current portion 1,415 $ 1,433
Inventory valuation reserve $ 400