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Intangible Assets, Net | 9 Months Ended
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Sep. 30, 2023
Intangible Assets, net [Abstract] |
Intangible Assets, net | 10. Intangible Assets, net Intangible assets as of December 31, 2022 and September 30, 2023 consisted of the followings:
|  | December 31, 2022 |  |  | September 30, 2023 |
Computer software at cost |  | $ | 104,211 |  |  | $ | 136,305 |
Sewage discharge permit* |  |  | 1,762,129 |  |  |  | 1,673,386 |
|  |  | 1,866,340 |  |  |  | 1,809,691 |
Accumulated amortization |  |  | (557,282 | ) |  |  | (873,629 | )
|  | $ | 1,309,058 |  |  | $ | 936,062 |
Amortization expenses were $121,035 and $133,450 for the three months ended September 30, 2022 and 2023, respectively. Amortization expenses were $397,114 and $374,110 for the nine months ended September 30, 2022 and 2023, respectively. Total future amortization expenses for finite-lived intangible assets as of September 30, 2023 were estimated as follows:
Remainder of 2023 |  | $ | 115,587 |
2024 |  |  | 460,325 |
2025 |  |  | 308,341 |
2026 |  |  | 9,472 |
2027 |  |  | 8,034 |
Thereafter |  |  | 34,303 |
Total |  | $ | 936,062 |

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//350-30/tableOfContent + Details
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