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Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of intangible assets | Intangible assets and Goodwill consisted of the following at December 31:
|  | 2019 |  | 2018
Product and license rights |  | $ | 37,400,742 |  |  | $ | 36,573,941 |
Less: accumulated amortization |  | (11,499,141) |  |  | (8,405,188) |
Total product and license rights |  | 25,901,601 |  |  | 28,168,753 |
Patents |  | 9,882,511 |  |  | 9,428,266 |
Less: accumulated amortization |  | (5,127,878) |  |  | (4,087,273) |
Total patents |  | 4,754,633 |  |  | 5,340,993 |
Trademarks |  | 273,110 |  |  | 154,373 |
Less: accumulated amortization |  | (9,020) |  |  | (9,020) |
Total trademarks |  | 264,090 |  |  | 145,353 |
Total intangible assets |  | $ | 30,920,324 |  |  | $ | 33,655,099 |
Goodwill |  | $ | 882,000 |  |  | $ | 784,000 |
Schedule of expected amortization expense of intangible assets | Amortization expense related to product and license rights, trademarks and patents were as follows for the years ended December 31:
|  | 2019 |  | 2018 |  | 2017
Amortization expense |  | $ | 4,134,557 |  |  | $ | 2,769,466 |  |  | $ | 2,436,222 |
The expected amortization expense for the Company's current balance of intangible assets are as follows:
Year ending December 31: |  |
2020 |  | $ | 4,286,336 |
2021 |  | 4,084,702 |
2022 |  | 3,530,879 |
2023 |  | 3,743,526 |
2024 and thereafter |  | 15,274,881 |
|  | $ | 30,920,324 |

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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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