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Patents | 12 Months Ended
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Dec. 31, 2018
Notes to Financial Statements |
Note 4. Patents | Patents represent legal fees and filing costs that are capitalized and will be amortized over their estimated useful lives of 17 to 20 years or their remaining legal lives, whichever is shorter, after they are placed in service. For the years ended December 31, 2018 and 2017, we capitalized approximately $0.2 million each year, for patent filing costs. The total investment in patents was approximately $1.6 million and $1.4 million as of December 31, 2018 and 2017, respectively. No amortization expense of patents was recorded in either of the years ended December 31, 2018 and 2017. These patents were not placed in service for the years ended December 31, 2018 and 2017, or in prior years.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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