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Commitments and Contingencies - Litigation (Details) - USD ($)
$ in Millions
Feb. 28, 2018
Feb. 27, 2018
Feb. 13, 2018
Oct. 07, 2013
Loss Contingencies [Line Items]        
Payment of legal settlement $ 4.5      
Amount of reimbursement of attorneys fees and portion of settlement.   $ 1.9    
Tails Inc.        
Loss Contingencies [Line Items]        
Cash consideration       $ 20.2
Selling, General and Administrative Expenses [Member]        
Loss Contingencies [Line Items]        
Charges on settlement     $ 2.6