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Inventories (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Sep. 30, 2014
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 8,119 $ 5,957
Work-in-process 8,645 6,232
Finished goods 10,686 6,730
Total inventories $ 27,450 $ 18,919