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Trade Receivables and Reseller Financing - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2019
Bottom of range [member]  
Summary of trade receivables [line items]  
Terms of reseller financing 12 months
Reseller financing rate per month 0.00%
Top of range [member]  
Summary of trade receivables [line items]  
Terms of reseller financing 60 months
Reseller financing rate per month 1.00%
Average [member]  
Summary of trade receivables [line items]  
Terms of reseller financing 40 months