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v3.25.1

Contracts in progress (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2027 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Contracts in progress |  |  |  |  |
Revenues recognized to date on contracts in process |  |  | $ 114,590,991 | $ 108,952,682 |
Amounts billed to date on contracts in process |  |  | (121,833,354) | (101,724,459) |
Retainage |  |  | 2,585,952 | 8,087,823 |
Net contract asset (liability) |  |  | (4,656,411) | 15,316,046 |
Balance Sheet location |  |  |  |  |
Contract assets |  |  | 4,470,243 | 21,553,057 |
Contract liabilities |  |  | (9,126,654) | (6,237,011) |
Income from operations |  |  | 18,284,798 | 37,167,627 | $ 9,272,185
Net Income (Loss) |  |  | $ 28,237,554 | $ 29,585,391 | $ 5,856,294
Increase in diluted earnings |  |  | $ 1.12 | $ 1.93 | $ 0.54
Increase in basic earnings |  |  | $ 1.13 | $ 1.95 | $ 0.54
Change in accounting method accounted for as change in estimate |  |  |  |  |
Balance Sheet location |  |  |  |  |
Income from operations |  |  |  | $ 2,356,439 |
Net Income (Loss) |  |  | $ 1,750,750 | $ 1,750,750 |
Increase in diluted earnings |  |  | $ 0.11 | $ 0.11 |
Increase in basic earnings |  |  | $ 0.11 | $ 0.11 |
Contracts in progress |  |  |  |  |
Contracts in progress |  |  |  |  |
Revenues recognized to date on contracts in process |  |  | $ 151,300,000 |  |
Balance Sheet location |  |  |  |  |
Amount recognized revenue included in the contract liability balance |  |  | $ 6,200,000 |  |
Contracts in progress | Forecast |  |  |  |  |
Contracts in progress |  |  |  |  |
Revenues recognized to date on contracts in process | $ 107,100,000 | $ 44,200,000 |  |  |

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