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v3.22.2

Geographic and Other Information - Net Sales by Region, Based on Location of Products are Billed (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Total revenues | $ 101,376 | $ 113,876 | $ 205,469 | $ 236,895
Standard products business [Member] |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Total revenues | 91,288 | 103,268 | 185,298 | 216,174
Standard products business [Member] | Korea [Member] |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Total revenues | 31,168 | 30,868 | 62,198 | 57,302
Standard products business [Member] | Asia Pacific (Other Than Korea) [Member] |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Total revenues | 56,068 | 69,352 | 114,328 | 153,092
Standard products business [Member] | United States [Member] |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Total revenues | 2,492 | 1,363 | 5,356 | 2,637
Standard products business [Member] | Europe [Member] |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Total revenues | 1,560 | 1,206 | 3,416 | 2,449
Standard products business [Member] | Others [Member] |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Total revenues | $ 0 | $ 479 | $ 0 | $ 694

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. 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