Construction Backlog (Tables)

12 Months Ended

Dec. 31, 2018

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

Schedule of backlog of signed construction and engineering contracts

	2018			2017
Balance - beginning of period	$	76,659,029		$	541,291
New contracts and change orders during the period		29,189,062			81,179,323
Subtotal		105,848,091			81,720,614
Less: contract revenue earned during the period		(8,190,712	)		(5,061,585	)
Balance - end of period	$	97,657,379		$	76,659,029

Construction Backlog [Member]

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

Schedule of expects to satisfy remaining unsatisfied performance obligation

	2018
Within 1 year	$	22,563,674
1 to 2 years		54,639,417
Thereafter		20,454,288
Total Backlog	$	97,657,379