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Segment Information and Foreign Operations (Tables) | 12 Months Ended
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Dec. 31, 2017
Segment Information and Foreign Operations |
Revenues reported by product type | Product Information The following table represents revenue amounts (in thousands) by product type:
|  | Year Ended |
|  | December 31, |
|  | 2017 |  | 2016 |  | 2015 |
| Product Type: |  |  |  |  |  |  |  |  |
| Substrates | $ | 78,619 |  | $ | 65,633 |  | $ | 58,220 |
| Raw Materials and Others |  | 20,054 |  |  | 15,716 |  |  | 19,282 |
| Total | $ | 98,673 |  | $ | 81,349 |  | $ | 77,502 |
Revenue reported for products shipped to customers in the corresponding geographic region |
|  | Year Ended |
|  | December 31, |
|  | 2017 |  | 2016 |  | 2015 |
| Product revenue: |  |  |  |  |  |  |  |  |
| China | $ | 24,962 |  | $ | 17,448 |  | $ | 13,728 |
| Europe (primarily Germany) |  | 23,956 |  |  | 18,637 |  |  | 19,518 |
| Taiwan |  | 18,279 |  |  | 15,369 |  |  | 13,799 |
| Japan |  | 13,258 |  |  | 11,015 |  |  | 9,138 |
| Asia Pacific (excluding China, Taiwan and Japan) |  | 9,866 |  |  | 10,796 |  |  | 11,482 |
| North America (primarily the United States) |  | 8,352 |  |  | 8,084 |  |  | 9,837 |
| Total | $ | 98,673 |  | $ | 81,349 |  | $ | 77,502 |
Long-lived assets by geographic region |
|  | As of December 31, |
|  | 2017 |  | 2016 |
Long-lived assets by geographic region, net of depreciation: |  |  |  |  |  |  |
North America |  | $ | 1,410 |  | $ | 318 |
China |  |  | 45,120 |  |  | 27,487 |
|  | $ | 46,530 |  | $ | 27,805 |

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