XML 54 R43.htm IDEA: XBRL DOCUMENT v3.19.2
Revenue Recognition and Reserve for Sales Returns and Allowances - Additional Information (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Significant Accounting Policies [Line Items]    
Reserve for sales returns and allowances $ 24,498 $ 29,403
Minimum    
Significant Accounting Policies [Line Items]    
Discount on invoiced amount of products 1.00%  
Maximum    
Significant Accounting Policies [Line Items]    
Discount on invoiced amount of products 20.00%