XML 50 R35.htm IDEA: XBRL DOCUMENT v3.20.4
Summary of Significant Accounting Policies - Summary of Revenue by Distribution Chanel (Detail) - Sales Revenue, Net [Member]
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
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 92.00% 94.00%
Indirect channels [Member]    
Product Information [Line Items]    
Revenue from Contract with Customer Percentage 8.00% 6.00%