Leases (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Operating Leased Assets [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 0.5
Lease Expiration Period	3 years
Operating Leases, Rent Expense, Net	0.4	0.6	0.3
Operating Leases, Future Minimum Payments, Due in Two Years	0.4
Operating Leases, Future Minimum Payments, Due in Three Years	0.1
Operating Leases, Future Minimum Payments, Due in Four Years	0
Operating Leases, Future Minimum Payments, Due in Five Years	0
Operating Leases, Future Minimum Payments, Due Thereafter	$ 1.0