Annual report pursuant to Section 13 and 15(d)

Consolidated Valuation and Qualifying Accounts and Reserves (Detail)

v3.21.1
Consolidated Valuation and Qualifying Accounts and Reserves (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Allowance for doubtful accounts      
Valuation And Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Year $ 2,531 $ 850 $ 802
Charges (Reversals) to Cost or Expenses 1,488 1,827 469
Deductions (2) (146) (421)
Balance at End of Year 4,017 2,531 850
Allowance for sales returns      
Valuation And Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Year 210 210 210
Charges (Reversals) to Cost or Expenses 87    
Deductions (35)    
Balance at End of Year 262 210 210
Allowance for tax valuation      
Valuation And Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Year 53,222 46,967 40,866
Charges (Reversals) to Cost or Expenses 2,813 6,366 6,101
Deductions   (111)  
Balance at End of Year $ 56,035 $ 53,222 $ 46,967