Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Sep. 30, 2012
Inventory [Line Items]
Finished goods	$ 9,909	$ 2,075
Work-in-process	27,165	28,851
Raw materials and supplies	11,539	12,340
Deferred cost of revenues	2,806	891
Under (over) applied manufacturing overhead costs	(2,478)
Total	$ 48,941	$ 44,157