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Intangible Assets | 3 Months Ended
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Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | Note 4. Intangible Assets The components of our intangible assets at March 31, 2015 are summarized below:
Intangible Asset Class |  | Cost |  |  | Accumulated Amortization |  |  | Net Carrying Amount |  |  | Weighted Average Amortization Period |
Patents |  | $ | 1,243,612 |  |  | $ | (907,585 | ) |  | $ | 336,027 |  |  |  | 17 years |
Amortization expense was approximately $21,000 in the first quarter of 2015 and expected amortization expense for the year ended December 31, 2015 is approximately $83,000 The expected future annual amortization expense for each of the next five years based on current balances of our intangible assets is approximately as follows:
For the year ending December 31: |  |  |
2016 |  | $ | 75,496 |
2017 |  | $ | 54,923 |
2018 |  | $ | 27,978 |
2019 |  | $ | 27,978 |
2020 |  | $ | 26,594 |

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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 2 -URI http://asc.fasb.org/extlink&oid=26713463&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 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 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=26713463&loc=d3e16373-109275 + Details
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