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Other Assets - Amortization (Details)
$ in Millions
Jan. 31, 2019
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Amortization expense for remainder of fiscal 2019 $ 0.4
Amortization expense for 2020 0.1
Amortization expense for 2021 0.1
Amortization expense for 2022 0.1
Amortization expense for the year 2023 $ 0.1