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F. INTANGIBLE ASSETS | 12 Months Ended
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Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |
INTANGIBLE ASSETS | NOTE F—INTANGIBLE ASSETS At December 31, 2016 and 2015, intangible assets consisted of the following:
|  | 2016 |
|  | Gross |  | Accumulated |  | Intangible |
|  | Amount |  | amortization |  | assets, net |
|  | (in thousands) |
Patents |  | $ | 5,987 |  | $ | (1,997) |  | $ | 3,990 |
Trademarks |  |  | 14 |  |  | (11) |  |  | 3 |
Total intangible assets |  | $ | 6,001 |  | $ | (2,008) |  | $ | 3,993 |
|  | 2015 |
|  | Gross |  | Accumulated |  | Intangible |
|  | Amount |  | amortization |  | assets, net |
|  | (in thousands) |
Patents |  | $ | 5,446 |  | $ | (1,551) |  | $ | 3,895 |
Trademarks |  |  | 14 |  |  | (9) |  |  | 5 |
Total intangible assets |  | $ | 5,460 |  | $ | (1,560) |  | $ | 3,900 |
In 2014, the Company acquired an intangible asset from an unrelated company in the form of a license to various patents related to transceiver product technology. The weighted-average amortization period for the license is 10 years. For the years ended December 31, 2016, 2015 and 2014, amortization expense for intangible assets, included in general and administrative expenses on the income statement, was $0.5 million, $0.4 million and $0.4 million, respectively. The remaining weighted average amortization period for intangible assets is approximately 8.6 years. At December 31, 2016, approximate amortization expense for intangible assets was as follows (in thousands):
2017 |  | $ | 466 |
2018 |  |  | 466 |
2019 |  |  | 466 |
2020 |  |  | 466 |
2021 |  |  | 467 |
thereafter |  |  | 1,662 |
|  | $ | 3,993 |

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 + Details
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