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Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of intangible assets | Intangible assets and Goodwill consisted of the following at December 31:
|  | 2020 |  | 2019
Product and license rights |  | $ | 38,543,542 |  |  | $ | 37,400,742 |
Less: accumulated amortization |  | (14,709,824) |  |  | (11,499,141) |
Total product and license rights |  | 23,833,718 |  |  | 25,901,601 |
Patents |  | 10,306,922 |  |  | 9,882,511 |
Less: accumulated amortization |  | (6,312,460) |  |  | (5,127,878) |
Total patents |  | 3,994,462 |  |  | 4,754,633 |
Trademarks |  | 338,011 |  |  | 273,110 |
Less: accumulated amortization |  | (47,875) |  |  | (9,020) |
Total trademarks |  | 290,136 |  |  | 264,090 |
Total intangible assets |  | $ | 28,118,316 |  |  | $ | 30,920,324 |
Goodwill |  | $ | 882,000 |  |  | $ | 882,000 |
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:
|  | 2020 |  | 2019 |  | 2018
Amortization expense |  | $ | 4,434,120 |  |  | $ | 4,134,557 |  |  | $ | 2,769,466 |
The expected amortization expense for the Company's current balance of intangible assets are as follows:
Year ending December 31: |  |
2021 |  | $ | 4,338,247 |
2022 |  | 3,691,293 |
2023 |  | 3,629,001 |
2024 |  | 3,629,001 |
2025 and thereafter |  | 12,830,774 |
|  | $ | 28,118,316 |

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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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