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CONCENTRATION OF RISK (Tables) | 12 Months Ended
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Dec. 31, 2025
Risks and Uncertainties [Abstract] |
Revenues and Accounts Receivable From Our Largest Customers | Revenues and accounts receivable from the Company's largest customers for the years ended December 31, 2025, 2024 and 2023 were as follows (in thousands):
|  | 2025 |  |  | 2024 |  |  | 2023 |
Customer |  | % of Total Revenue |  | Accounts Receivable |  |  | % of Total Revenue |  | Accounts Receivable |  |  | % of Total Revenue |  | Accounts Receivable |
A |  | 43% |  | $ | 69,564 |  |  | 43% |  | $ | 37,899 |  |  | 36% |  | $ | 38,105 |
B |  | 21% |  |  | 30,378 |  |  | 23% |  |  | 25,751 |  |  | 23% |  |  | 30,142 |
C |  | 15% |  |  | 3,539 |  |  | 16% |  |  | 13,258 |  |  | 17% |  |  | 38,529 |
Revenues by Geographic Area | Revenues by geographic area are as follows (in thousands):
|  | Year Ended December 31, |
Country |  | 2025 |  |  | 2024 |  |  | 2023 |
South Korea |  | $ | 383,500 |  |  | $ | 397,822 |  |  | $ | 322,509 |
China |  |  | 238,208 |  |  |  | 229,439 |  |  |  | 229,727 |
Japan |  |  | 2,818 |  |  |  | 3,609 |  |  |  | 6,971 |
Other non-U.S. locations |  |  | 1,657 |  |  |  | 2,456 |  |  |  | 4,411 |
Total non-U.S. locations |  |  | 626,183 |  |  |  | 633,326 |  |  |  | 563,618 |
United States |  |  | 24,428 |  |  |  | 14,358 |  |  |  | 12,811 |
Total revenue |  | $ | 650,611 |  |  | $ | 647,684 |  |  | $ | 576,429 |
Long-Lived Assets (Net) by Geographic Area | Property and equipment, net by geographic area are as follows (in thousands):
|  | December 31, |
Country |  | 2025 |  |  | 2024 |
United States |  | $ | 120,835 |  |  | $ | 117,496 |
Ireland |  |  | 73,838 |  |  |  | 63,346 |
Other |  |  | 20,274 |  |  |  | 14,397 |
Total long-lived assets |  | $ | 214,947 |  |  | $ | 195,239 |

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