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Summary of Significant Accounting Policies - Summary of Revenue by Distribution Chanel (Detail) - Sales Revenue, Net [Member]
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Product Information [Line Items]    
Revenue from Contract with Customer Percentage 100.00% 100.00%
Direct channels [Member]    
Product Information [Line Items]    
Revenue from Contract with Customer Percentage 90.00% 93.00%
Indirect channels [Member]    
Product Information [Line Items]    
Revenue from Contract with Customer Percentage 10.00% 7.00%