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Construction Backlog (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Construction Backlog [Abstract] |  |
Balance - beginning of period | $ 25,117,461 | $ 17,634,261
New contracts and change orders during the period | 1,047,324 | 13,816,785
Adjustments and cancellations, net |  | (27,370)
Subtotal | 26,164,785 | 31,423,676
Less: contract revenue earned during the period | (3,293,305) | (6,306,215)
Balance - end of period | $ 22,871,480 | $ 25,117,461

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- Definition Construction Backlog Gross + References No definition available. + Details
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- Definition Construction contracts backlog. + References No definition available. + Details
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- Definition Amount of contract revenue. + References No definition available. + Details
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