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Long-Term Debt (Details) - USD ($)
$ in Millions
Jul. 31, 2019
Jan. 31, 2019
Debt Instrument [Line Items]    
Long-term debt $ 242.6 $ 242.2
Asset based revolving line of credit    
Debt Instrument [Line Items]    
Amount outstanding 0.0  
Revolving credit facility 100.0  
Outstanding letter of credit amount 0.8  
Senior Secured Notes 11.5 Percent Due 2025    
Debt Instrument [Line Items]    
Principle amount $ 250.0  
Debt instrument, stated interest rate (as a percent) 11.50%  
Long term debt outstanding $ 242.6