Quarterly report [Sections 13 or 15(d)]

Contracts in Progress (Costs and Estimated Earnings in Excess of Billings) (Details)

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Contracts in Progress (Costs and Estimated Earnings in Excess of Billings) (Details) - USD ($)
Sep. 30, 2025
Dec. 31, 2024
Contracts in Progress [Abstract]    
Costs incurred on uncompleted contracts $ 3,352,006 $ 1,233,151
Estimated earnings 3,187,573 1,219,234
Total costs and estimated earnings 6,539,579 2,452,385
Billings to date 5,742,189 1,891,737
Costs and estimated earnings in excess of billings on uncompleted contracts $ 797,390 $ 560,648