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Inventory (Schedule of Components of Inventory) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Sep. 30, 2016
Inventory Disclosure [Abstract]    
Raw materials $ 16,515 $ 16,095
Work in-process 6,996 5,687
Finished goods 8,252 5,899
Inventory balance at end of period 31,763 27,681
Current portion 28,198 24,150
Non-Current portion $ 3,565 $ 3,531