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Other Assets - Additional Information (Details)
$ in Millions
Apr. 30, 2016
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Amortization expense for remainder of fiscal 2016 $ 0.6
Amortization expense for the year 2017 1.1
Amortization expense for the year 2018 1.1
Amortization expense for the year 2019 0.7
Amortization expense for the years 2020-2023 $ 0.2