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CONCENTRATION OF RISK (Tables) | 12 Months Ended
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Dec. 31, 2023
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, 2023, 2022 and 2021 were as follows (in thousands):
|  | 2023 |  |  | 2022 |  |  | 2021 |
Customer |  | % of Total Revenue |  | Accounts Receivable |  |  | % of Total Revenue |  | Accounts Receivable |  |  | % of Total Revenue |  | Accounts Receivable |
A |  | 36% |  | $ | 38,105 |  |  | 41% |  | $ | 11,425 |  |  | 44% |  | $ | 10,850 |
B |  | 23% |  |  | 30,142 |  |  | 25% |  |  | 24,440 |  |  | 26% |  |  | 45,867 |
C |  | 17% |  |  | 38,529 |  |  | 16% |  |  | 22,291 |  |  | 14% |  |  | 18,557 |
Revenues by Geographic Area | Revenues by geographic area are as follows (in thousands):
|  | Year Ended December 31, |
Country |  | 2023 |  |  | 2022 |  |  | 2021 |
South Korea |  | $ | 322,509 |  |  | $ | 360,640 |  |  | $ | 334,835 |
China |  |  | 229,727 |  |  |  | 230,582 |  |  |  | 192,079 |
Japan |  |  | 6,971 |  |  |  | 5,579 |  |  |  | 7,358 |
Other non-U.S. locations |  |  | 4,411 |  |  |  | 3,829 |  |  |  | 3,137 |
Total non-U.S. locations |  |  | 563,618 |  |  |  | 600,630 |  |  |  | 537,409 |
United States |  |  | 12,811 |  |  |  | 15,989 |  |  |  | 16,116 |
Total revenue |  | $ | 576,429 |  |  | $ | 616,619 |  |  | $ | 553,525 |
Long-Lived Assets (Net) by Geographic Area | Property and equipment, net by geographic area are as follows (in thousands):
|  | December 31, |
Country |  | 2023 |  |  | 2022 |
United States |  | $ | 118,250 |  |  | $ | 117,255 |
Ireland |  |  | 42,203 |  |  |  | 20,270 |
Other |  |  | 14,697 |  |  |  | 5,920 |
Total long-lived assets |  | $ | 175,150 |  |  | $ | 143,445 |

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