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Property, Plant and Equipment | 12 Months Ended
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Dec. 31, 2016
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment Disclosure [Text Block] |
| Note 9. | Property, Plant and Equipment
|  | December 31, |
|  | 2015 |  | 2016 |
|  | (in thousands) |
Land |  | $ | 14,328 |  |  | 14,328 |
Building and improvements |  |  | 22,460 |  |  | 22,821 |
Machinery |  |  | 42,770 |  |  | 42,687 |
Research and development equipment |  |  | 25,949 |  |  | 26,695 |
Software |  |  | 13,260 |  |  | 12,902 |
Office furniture and equipment |  |  | 10,655 |  |  | 11,210 |
Others |  |  | 24,793 |  |  | 27,269 |
|  |  | 154,215 |  |  | 157,912 |
Accumulated depreciation and amortization |  |  | (101,373) |  |  | (111,915) |
Prepayment for purchases of land and equipment |  |  | 1,619 |  |  | 2,175 |
|  | $ | 54,461 |  |  | 48,172 |
Depreciation and amortization of these assets for the years ended December 31, 2014, 2015 and 2016 were $13,639 thousand, $13,312 thousand and $12,765 thousand, respectively.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13-14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64862545&loc=d3e2921-110230 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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