Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Sep. 30, 2011
Schedule of Inventory [Line Items]
Raw materials	$ 1,559	$ 1,352
Work in progress	260	379
Finished goods	309	309
Inventory, Gross, Total	2,128	2,040
Obsolescence reserve	(383)	(404)
Inventories	$ 1,745	$ 1,636