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Other Intangible Assets, Other than Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2016
Intangible Assets, Net (Excluding Goodwill) [Abstract] |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | December 31, 2015 |
|  |  |  | Weighted |  |  |
|  | Gross |  | average |  |  |
|  | carrying |  | amortization |  |  | Accumulated |
|  | amount |  | period |  |  | amortization |
|  |  |  | (in thousands) |  |  |
Amortized intangible assets: |  |  |  |  |  |  |  |  |  |
Technology |  | $ | 6,889 |  | 7 years |  |  |  | 2,787 |
Patents |  |  | 100 |  | 15 years |  |  |  | 41 |
Total |  | $ | 6,989 |  |  |  |  |  | 2,828 |
|  | December 31, 2016 |
|  |  |  | Weighted |  |  |
|  | Gross |  | average |  |  |
|  | carrying |  | amortization |  | Accumulated |
|  | amount |  | period |  | amortization |
|  |  |  | (in thousands) |  |  |
Amortized intangible assets: |  |  |  |  |  |  |  |  |  |
Technology |  | $ | 6,889 |  | 7 years |  |  |  | 3,771 |
Patents |  |  | 100 |  | 15 years |  |  |  | 48 |
Total |  | $ | 6,989 |  |  |  |  |  | 3,819 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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