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Commitments and Contingencies (Operating Leases) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2012
Commitments and Contingencies Disclosure [Abstract]      
Operating leases, rental expense $ 1.0 $ 1.0 $ 1.4
Future minimum rental commitments 2.3    
Future minimum rental commitments, due in fiscal 2015 1.0    
Future minimum rental commitments, due in fiscal 2016 0.5    
Future minimum rental commitments, due in fiscal 2017 0.4    
Future minimum rental commitments, due in fiscal 2018 0.2    
Future minimum rental commitments, due in fiscal 2019 0.2    
Future minimum rental commitments, due thereafter $ 0.1