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Intangible assets other than goodwill - Schedule of Intangible Assets (Details) - USD ($) | Dec. 31, 2024 | Dec. 31, 2023
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Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets | $ 4,806,795 | $ 4,354,331
Less - accumulated amortization | (2,293,606) | (1,918,102)
Intangible Assets, Net | 2,513,189 | 2,436,229
Product Certifications |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets | 777,465 | 777,465
Less - accumulated amortization | (709,855) | (658,676)
Intangible Assets, Net | 67,610 | 118,789
Patents |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets | 888,910 | 888,910
Less - accumulated amortization | (584,493) | (496,807)
Intangible Assets, Net | 304,417 | 392,103
Developed Technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets | 240,000 | 240,000
Less - accumulated amortization | (188,000) | (172,000)
Intangible Assets, Net | 52,000 | 68,000
Favorable contract assets |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets | 384,465 | 384,465
Less - accumulated amortization | (379,839) | (376,139)
Intangible Assets, Net | 4,626 | 8,326
Customer contract |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets | 2,225,123 | 1,772,659
Less - accumulated amortization | (290,025) | (110,791)
Intangible Assets, Net | 1,935,098 | 1,661,868
Trademarks |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets | 26,896 | 26,896
Less - accumulated amortization | 0 | 0
Intangible Assets, Net | 26,896 | 26,896
In process R&D |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets | 263,936 | 263,936
Less - accumulated amortization | (141,394) | (103,689)
Intangible Assets, Net | 122,542 | 160,247
Unfavorable Contract Liability |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible liability | 2,618,168 | 2,618,168
Less - accumulated amortization | (2,195,329) | (2,019,122)
Intangible Liabilities, Net | $ 422,839 | $ 599,046

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