Construction Backlog (Tables)

6 Months Ended

Jun. 30, 2019

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]

Schedule of backlog of signed construction and engineering contracts

	June 30, 2019			December 31, 2018
Balance - beginning of period	$	97,657,379		$	76,659,029
New contracts and change orders during the period, net		145,745			58,805,877
Adjustments and cancellations, net		(24,571,359	)		(29,616,815	)
Subtotal		73,231,765			105,848,091
Less: contract revenue earned during the period		(2,463,032	)		(8,190,712	)
Balance - end of period	$	70,768,733		$	97,657,379

Construction Backlog [Member]

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]

Schedule of expects to satisfy remaining unsatisfied performance obligation

	2019
Within 1 year	$	14,324,626
1 to 2 years		34,500,000
Thereafter		21,944,107
Total Backlog	$	70,768,733