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Inventory (Schedule of Components of Inventory) (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Sep. 30, 2016
Inventory Disclosure [Abstract]    
Raw materials $ 16,033 $ 16,095
Work in-process 6,586 5,687
Finished goods 6,643 5,899
Inventory balance at end of period 29,262 27,681
Current portion 26,147 24,150
Non-Current portion $ 3,115 $ 3,531