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Construction Backlog (Details) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Construction Backlog [Abstract]    
Balance - beginning of period $ 76,659,029 $ 541,291
New contracts and change orders during the period 31,683,565 81,179,323
Subtotal 108,342,594 81,720,614
Less: contract revenue earned during the period (4,593,510) (5,061,585)
Balance - end of period $ 103,749,084 $ 76,659,029