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Investments in Non-Marketable Equity Securities (Tables) | 12 Months Ended
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Dec. 31, 2016
Investments, All Other Investments [Abstract] |
Schedule of Cost Method Investments [Table Text Block] | Following is a summary of such investments which are accounted for using the cost method as of December 31, 2015 and 2016:
|  | December 31, |
|  | 2015 |  | 2016 |
|  | (in thousands) |
Chi Lin Optoelectronics Co., Ltd. |  | $ | 625 |  |  | 488 |
Chi Lin Technology Co., Ltd. |  |  | 432 |  |  | 432 |
Jetronics International Corp. |  |  | 432 |  |  | - |
C Company |  |  | 8,962 |  |  | 8,962 |
TIEF Fund, L. P. |  |  | - |  |  | 1,600 |
eTurboTouch Technology Inc. |  |  | 477 |  |  | 477 |
Oculon Optoelectronics Inc. |  |  | - |  |  | - |
Shinyoptics Corp. |  |  | 283 |  |  | 283 |
|  | $ | 11,211 |  |  | 12,242 |

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- Definition A tabular disclosure of (a) the aggregate carrying amount of all cost-method investments; (b) the aggregate carrying amount of cost-method investments that the investor did not evaluate for impairment for cost-method investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6872867&loc=d3e40691-111596 + Details
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