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Segment Information - Customers Accounted for 10% or More of Revenue (Parenthetical) (Detail) - Customer Concentration Risk [Member] - Sales [Member]
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Minimum [Member]        
Revenue, Major Customer [Line Items]        
Entity wide revenue major customers percentage     10.00%  
Walmart [Member]        
Revenue, Major Customer [Line Items]        
Entity wide revenue major customers percentage 12.00%   12.00%  
Walmart [Member] | Maximum [Member]        
Revenue, Major Customer [Line Items]        
Entity wide revenue major customers percentage   10.00%   10.00%