Quarterly report [Sections 13 or 15(d)]

Intangible Assets and Liabilities Other Than Goodwill -Amounts related to intangible assets (Details)

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Intangible Assets and Liabilities Other Than Goodwill -Amounts related to intangible assets (Details) - USD ($)
Sep. 30, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Intangible assets $ 4,806,795 $ 4,806,795
Less - accumulated amortization (2,570,644) (2,293,606)
Intangible assets, net 2,236,151 2,513,189
Unfavorable Contract Liability    
Finite-Lived Intangible Assets [Line Items]    
Unfavorable contract liability 2,618,168 2,618,168
Less - accumulated amortization (2,285,181) (2,195,329)
Unfavorable contract liability, net 332,987 422,839
Product Certifications    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets 777,465 777,465
Less - accumulated amortization (727,178) (709,855)
Intangible assets, net 50,287 67,610
Patents    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets 888,910 888,910
Less - accumulated amortization (659,561) (584,493)
Intangible assets, net 229,349 304,417
Developed Technology    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets 240,000 240,000
Less - accumulated amortization (200,000) (188,000)
Intangible assets, net 40,000 52,000
Favorable Contract Asset    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets 384,465 384,465
Less - accumulated amortization (382,615) (379,839)
Intangible assets, net 1,850 4,626
Customer Contracts    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets 2,225,123 2,225,123
Less - accumulated amortization (431,617) (290,025)
Intangible assets, net 1,793,506 1,935,098
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 (169,673) (141,394)
Intangible assets, net $ 94,263 $ 122,542