Inventories - Schedule of Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Sep. 30, 2016
Inventory Disclosure [Abstract]
Raw materials and supplies	$ 5,721	$ 7,724
Work-in-process	10,122	10,459
Finished goods	9,606	10,313
Total inventories	$ 25,449	$ 28,496