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, 2026
Dec. 31, 2025
Intangible Asset, Finite-Lived [Line Items]    
Intangible assets $ 4,806,749 $ 4,806,795
Less - accumulated amortization (2,927,340) (2,660,292)
Intangible assets, net 1,879,409 2,146,503
Unfavorable Contract Liability    
Intangible Asset, Finite-Lived [Line Items]    
Unfavorable contract liability 2,341,478 2,341,478
Less - accumulated amortization (2,170,315) (2,136,143)
Unfavorable contract liability, net 171,163 205,335
Product Certifications    
Intangible Asset, Finite-Lived [Line Items]    
Intangible assets 777,465 777,465
Less - accumulated amortization (748,340) (732,469)
Intangible assets, net 29,125 44,996
Patents    
Intangible Asset, Finite-Lived [Line Items]    
Intangible assets 888,864 888,910
Less - accumulated amortization (750,750) (682,370)
Intangible assets, net 138,114 206,540
Developed Technology    
Intangible Asset, Finite-Lived [Line Items]    
Intangible assets 240,000 240,000
Less - accumulated amortization (216,000) (204,000)
Intangible assets, net 24,000 36,000
Favorable Contract Asset    
Intangible Asset, Finite-Lived [Line Items]    
Intangible assets 384,465 384,465
Less - accumulated amortization (384,465) (383,540)
Intangible assets, net 0 925
Customer Contracts    
Intangible Asset, Finite-Lived [Line Items]    
Intangible assets 2,225,123 2,225,123
Less - accumulated amortization (620,407) (478,813)
Intangible assets, net 1,604,716 1,746,310
Trademarks    
Intangible Asset, Finite-Lived [Line Items]    
Intangible assets 26,896 26,896
Less - accumulated amortization 0 0
Intangible assets, net 26,896 26,896
In Process Research and Development [Member]    
Intangible Asset, Finite-Lived [Line Items]    
Intangible assets 263,936 263,936
Less - accumulated amortization (207,378) (179,100)
Intangible assets, net $ 56,558 $ 84,836