Operating Segments - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended				3 Months Ended	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2013 Segment	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2013 SRI Litigation [Member]	Sep. 30, 2012 Corporate [Member]	Sep. 30, 2013 Corporate [Member]	Sep. 30, 2011 Corporate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Number of operating segments		2
Restructuring Charges	$ 500,000	$ 476,000		$ 1,616,000			$ 500,000	$ 1,600,000
Modified tender offer cost			500,000			500,000
Legal expenses	$ 600,000				$ 1,000,000