Concentration of Risk and Enterprise-Wide Disclosures (Tables)

6 Months Ended

Jun. 30, 2022

Trade and contract retainage receivables

Concentration Risk [Line Items]

Schedules of concentration of risk, by risk factor

	June 30, 2022				December 31, 2021
Federal Government	$	3,832	3	%	$	6,563	5	%
State Governments		555	-	%		61	-	%
Local Governments		19,564	13	%		11,923	9	%
Private Companies		129,103	84	%		111,328	86	%
Gross receivables		153,054	100	%		129,875	100	%
Allowance for credit losses		(380)				(323)
Net receivables	$	152,674			$	129,552

Contract revenues

Concentration Risk [Line Items]

Schedules of concentration of risk, by risk factor

	Three months ended June 30,								Six months ended June 30,
	2022		%		2021		%		2022		%		2021		%
Federal Government	$	19,834	10	%	$	12,345	9	%	$	42,529	12	%	$	25,109	9	%
State Governments		13,753	7	%		246	-	%		21,457	5	%		414	-	%
Local Governments		26,198	13	%		38,576	26	%		58,600	16	%		72,092	24	%
Private Companies		134,790	69	%		94,708	65	%		246,920	67	%		201,569	67	%
Total contract revenues	$	194,575	99	%	$	145,875	100	%	$	369,506	100	%	$	299,184	100	%