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Inventory (Schedule of Components of Inventory) (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Sep. 30, 2016
Inventory Disclosure [Abstract]    
Raw materials $ 16,099 $ 16,095
Work in-process 5,988 5,687
Finished goods 7,591 5,899
Inventory balance at end of period 29,678 27,681
Current portion 26,348 24,150
Non-Current portion $ 3,330 $ 3,531