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Related Party Transactions - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Nov. 01, 2018
Dec. 31, 2018
Mommy Guru    
Related Party Transaction [Line Items]    
Marketing fee paid   $ 2.4
Mommy Guru | Chief Marketing Officer    
Related Party Transaction [Line Items]    
Marketing fee paid   1.9
Compensation expense   $ 0.1
Voting Agreement    
Related Party Transaction [Line Items]    
Percentage of voting power of capital stock outstanding 19.90%