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Summary of Significant Accounting Policies - Property and Equipment, Useful Lives (Details)
12 Months Ended
Dec. 31, 2019
Office furniture  
Property, Plant and Equipment [Line Items]  
Property and equipment useful life 7 years
Computer hardware  
Property, Plant and Equipment [Line Items]  
Property and equipment useful life 3 years
Computer software | Minimum  
Property, Plant and Equipment [Line Items]  
Property and equipment useful life 3 years
Computer software | Maximum  
Property, Plant and Equipment [Line Items]  
Property and equipment useful life 8 years
Production equipment and molds | Minimum  
Property, Plant and Equipment [Line Items]  
Property and equipment useful life 3 years
Production equipment and molds | Maximum  
Property, Plant and Equipment [Line Items]  
Property and equipment useful life 7 years