Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Details)

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Commitments and Contingencies - Additional Information (Details) - Federal Trade Commission Civil Investigative Demand - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
Oct. 31, 2018
Sep. 30, 2018
Mar. 31, 2018
Loss Contingencies [Line Items]      
Loss contingency accrual     $ 1.9
Loss contingency additional accrual   $ 1.1  
Subsequent Event      
Loss Contingencies [Line Items]      
Settlement loss $ 3.0