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Intangible Assets, Net (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |  |
Amortization expense | $ 46,167 | $ 64,084 | $ 246,681 | $ 256,332
Estimated aggregate amortization expense for 2021 | 138,500 |  | 184,667 |
Estimated aggregate amortization expense for 2022 | 149,944 |  | 149,944 |
Estimated aggregate amortization expense for 2023 | 18,000 |  | 18,000 |
Estimated aggregate amortization expense for 2024 | 17,354 |  | 17,354 |
Estimated aggregate amortization expense for 2025 | 2,500 |  | 2,500 |
Estimated aggregate amortization expense for thereafter | $ 8,745 |  | $ 8,745 |

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- Definition Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + 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)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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