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CONCENTRATION OF RISK (Tables) | 6 Months Ended
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Jun. 30, 2023
Risks and Uncertainties [Abstract] |
Revenues and Accounts Receivable From Our Largest Customers | Revenues and accounts receivable from the Company's largest customers were as follows (in thousands):
|  | % of Total Revenue for the Three Months Ended June 30, |  | % of Total Revenue for the Six Months Ended June 30, |  | Accounts Receivable as of |
Customer |  | 2023 |  | 2022 |  | 2023 |  | 2022 |  | June 30, 2023 |
A |  | 36% |  | 39% |  | 33% |  | 39% |  | $ | 10,776 |
B |  | 22% |  | 30% |  | 24% |  | 29% |  | $ | 35,184 |
C |  | 14% |  | 6% |  | 11% |  | 4% |  | $ | 21,104 |
D |  | 13% |  | 14% |  | 17% |  | 15% |  | $ | 22,518 |
Revenues by Geographic Area | Revenues from outside of North America represented approximately 98% and 97% for the three months ended June 30, 2023 and 2022, respectively, and 97% for both six-month periods ended June 30, 2023 and 2022. Revenues by geographic area are as follows (in thousands):
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
Country |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
South Korea |  | $ | 82,029 |  |  | $ | 79,096 |  |  | $ | 148,089 |  |  | $ | 168,783 |
China |  |  | 57,520 |  |  |  | 51,180 |  |  |  | 114,947 |  |  |  | 106,580 |
Japan |  |  | 1,509 |  |  |  | 1,392 |  |  |  | 3,156 |  |  |  | 2,445 |
Other non-U.S. locations |  |  | 1,978 |  |  |  | 715 |  |  |  | 3,315 |  |  |  | 1,015 |
Total non-U.S. locations |  |  | 143,036 |  |  |  | 132,383 |  |  |  | 269,507 |  |  |  | 278,823 |
United States |  |  | 3,529 |  |  |  | 4,178 |  |  |  | 7,525 |  |  |  | 8,208 |
Total revenue |  | $ | 146,565 |  |  | $ | 136,561 |  |  | $ | 277,032 |  |  | $ | 287,031 |
Long-Lived Assets (Net) by Geographic Area | Long-lived assets (net), by geographic area are as follows (in thousands):
|  | June 30, 2023 |  |  | December 31, 2022 |
United States |  | $ | 117,196 |  |  | $ | 117,255 |
Ireland |  |  | 25,894 |  |  |  | 20,270 |
Other |  |  | 14,476 |  |  |  | 5,920 |
Total long-lived assets |  | $ | 157,566 |  |  | $ | 143,445 |

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