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Other long-term assets (Tables) | 3 Months Ended
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Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Other Long-Term Assets | Other long-term assets as of March 31, 2018 consisted of the following (unaudited):
Cost: |  | Beginning Balance December 31, 2017 |  |  | Additions |  |  | Ending Balance March 31, 2018 |
Patents |  | $ | 1,059,832 |  |  | $ | 24,074 |  |  | $ | 1,083,906 |
Goodwill |  |  | 1,186,496 |  |  |  | - |  |  |  | 1,186,496 |
Convertible note investment |  |  | 200,000 |  |  |  | - |  |  |  | 200,000 |
Total |  |  | 2,446,328 |  |  |  | 24,074 |  |  |  | 2,470,402 |
Accumulated amortization: |  |  |  |  |  |  |  |  |  |  |  |
Patents |  |  | (550,183 | ) |  |  | (14,610 | ) |  |  | (564,793 | )
Total |  |  | (550,183 | ) |  |  | (14,610 | ) |  |  | (564,793 | )
Net other long-term assets |  | $ | 1,896,145 |  |  | $ | 9,464 |  |  | $ | 1,905,609
Schedule of Carrying Amounts Related to Acquired Intangible Assets | The carrying amounts related to acquired intangible assets as of March 31, 2018 were as follows (unaudited):
|  | March 31, 2018 |
Patents at January 1, 2018, net |  | $ | 509,649 |
Additions |  |  | 24,074 |
Less: amortization expense |  |  | 14,610 |
Patents at March 31, 2018, net |  | $ | 519,113
Schedule of Total Estimated Amortization of Intangible Assets | The following table represents the total estimated amortization of intangible assets for the five succeeding years:
For the year ended December 31, |  | Estimated amortization expense |
2018 |  | $ | 43,390 |
2019 |  | $ | 58,000 |
2020 |  | $ | 58,000 |
2021 |  | $ | 58,000 |
2022 |  | $ | 46,479

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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://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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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