Contract Assets and Contract Liabilities (Tables)

3 Months Ended

Mar. 31, 2019

Contract Assets and Contract Liabilities [Abstract]

Summary of costs and estimated earnings on uncompleted contracts

	March 31,  2019			December 31, 2018
Costs incurred on uncompleted contracts	$	11,175,706		$	11,307,975
Estimated earnings to date on uncompleted contracts		1,032,413			838,615
Gross contract assets		12,208,119			12,146,590
Less: billings to date		(13,776,176	)		(13,221,152	)
Net contract assets (liabilities)	$	(1,568,057	)	$	(1,074,562	)

Summary of costs included in condensed consolidated balance sheets

	March 31,  2019			December 31, 2018
Costs and estimated earnings in excess of billings on uncompleted contracts	$	12,424		$	260,325
Billings in excess of costs and estimated earnings on uncompleted contracts		(1,580,481	)		(1,334,887	)
Net contract assets (liabilities)	$	(1,568,057	)	$	(1,074,562	)