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Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2014
Long-Lived Assets (Property and Equipment, Net) by Geographic Area | Long-lived assets (property and equipment, net) by geographic area were as follows:
|  | Year Ended December 31 |
|  | 2012 |  |  | 2013 |  |  | 2014 |
|  | US$ |  |  | US$ |  |  | US$ |
Taiwan |  |  | 16,799 |  |  |  | 24,066 |  |  |  | 28,739 |
United States |  |  | 58 |  |  |  | 54 |  |  |  | 142 |
Korea |  |  | 2,226 |  |  |  | 1,773 |  |  |  | 2,477 |
China |  |  | 4,303 |  |  |  | 4,302 |  |  |  | 4,179 |
|  |  | 23,386 |  |  |  | 30,195 |  |  |  | 35,537 |
Product |
Net Sales | The following summarizes the Company’s revenue by product category:
|  | Year Ended December 31 |
|  | 2012 |  |  | 2013 |  |  | 2014 |
|  | US$ |  |  | US$ |  |  | US$ |
Mobile Storage |  |  | 202,093 |  |  |  | 185,488 |  |  |  | 241,614 |
Mobile Communications |  |  | 67,564 |  |  |  | 31,022 |  |  |  | 40,034 |
Other products |  |  | 11,713 |  |  |  | 8,798 |  |  |  | 7,675 |
|  |  | 281,370 |  |  |  | 225,308 |  |  |  | 289,323 |
Customer Lists |
Net Sales | Major customers representing at least 10% of net sales
|  | Year Ended December 31 |
|  | 2012 |  |  | 2013 |  |  | 2014 |
|  | US$ |  |  | % |  |  | US$ |  |  | % |  |  | US$ |  |  | % |
Samsung |  |  | 98,368 |  |  |  | 35 |  |  |  | 36,037 |  |  |  | 16 |  |  |  | 30,065 |  |  |  | 10 |
SK Hynix |  |  | * |  |  |  | * |  |  |  | 67,977 |  |  |  | 30 |  |  |  | 107,227 |  |  |  | 37 |
* | Less than 10%
Country |
Net Sales | The following summarizes the Company’s revenue by geographic area:
|  | Year Ended December 31 |
|  | 2012 |  |  | 2013 |  |  | 2014 |
|  | US$ |  |  | US$ |  |  | US$ |
Taiwan |  |  | 74,034 |  |  |  | 47,653 |  |  |  | 57,244 |
United States |  |  | 20,230 |  |  |  | 22,528 |  |  |  | 26,265 |
Japan |  |  | 5,363 |  |  |  | 3,936 |  |  |  | 11,180 |
Korea |  |  | 137,797 |  |  |  | 115,287 |  |  |  | 150,557 |
China |  |  | 37,507 |  |  |  | 29,129 |  |  |  | 35,008 |
Others |  |  | 6,439 |  |  |  | 6,775 |  |  |  | 9,069 |
|  |  | 281,370 |  |  |  | 225,308 |  |  |  | 289,323 |

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- Definition Tabular disclosure of long-lived assets, excluding financial instruments, long-term customer relationships of a financial institution, mortgage rights, deferred policy acquisition costs, and deferred tax assets, by geographic areas located in the entity's country of domicile and foreign countries in which the entity holds assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 + Details
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