XML 108 R96.htm IDEA: XBRL DOCUMENT v3.21.1
Major customers representing at least 10% of net sales (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenue, Major Customer [Line Items]      
NET SALES $ 539,521 $ 457,253 $ 530,348 [1]
Net sales | Customers accounted for 10% or more | Intel      
Revenue, Major Customer [Line Items]      
NET SALES   $ 75,608 $ 67,791
Major customers, percentage of net sales   16.00% 13.00%
Net sales | Customers accounted for 10% or more | Micron      
Revenue, Major Customer [Line Items]      
NET SALES $ 127,708 $ 67,682  
Major customers, percentage of net sales 24.00% 15.00%  
Net sales | Customers accounted for 10% or more | SK Hynix      
Revenue, Major Customer [Line Items]      
NET SALES     $ 111,265
Major customers, percentage of net sales     21.00%
[1] In 2019 and 2020, revenue billed to Japan was reclassified to others.