Selected Balance Sheet Data (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Sep. 30, 2011
Inventory
Finished goods	$ 1,512	$ 3,227
Work-in-process	25,515	19,870
Raw materials and supplies	8,952	13,875
Deferred cost of revenues	4,916	2,182
Under (over) applied manufacturing overhead costs	(1,242)
Total	$ 39,653	$ 39,154