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Debt - Previous Credit Agreement (Details) - USD ($)
$ in Millions
May 08, 2017
Oct. 31, 2014
Mar. 20, 2017
Nov. 17, 2015
Term Loan        
Debt Instrument [Line Items]        
Principal $ 20.0      
Proceeds from term loans 18.0      
Debt discount on term loan 2.0      
Debt issuance costs $ 0.4      
Revolving Credit Facility        
Debt Instrument [Line Items]        
Term of debt instrument   5 years    
Maximum amount of credit facility   $ 25.0 $ 10.0 $ 48.0