Contract Assets and Contract Liabilities (Tables)

12 Months Ended

Dec. 31, 2018

Contract Assets and Contract Liabilities [Abstract]

Summary of costs and estimated earnings on uncompleted contracts

	2018			2017
Costs incurred on uncompleted contracts	$	11,307,975		$	3,681,965
Estimated earnings to date on uncompleted contracts		838,615			328,273
Gross contract assets		12,146,590			4,010,238
Less: billings to date		(13,221,152	)		(5,622,111	)
Net contract assets (liabilities)	$	(1,074,562	)	$	(1,611,873	)

Summary of costs included in condensed consolidated balance sheets

	2018			2017
Costs and estimated earnings in excess of billings on uncompleted contracts	$	260,325		$	61,175
Billings in excess of costs and estimated earnings on uncompleted contracts		(1,334,887	)		(1,673,048	)
Net contract assets (liabilities)	$	(1,074,562	)	$	(1,611,873	)