Concentration of Risk and Enterprise-Wide Disclosures (Tables)

9 Months Ended

Sep. 30, 2022

Trade and contract retainage receivables

Concentration Risk [Line Items]

Schedules of concentration of risk, by risk factor

	September 30, 2022				December 31, 2021
Federal Government	$	5,220	3	%	$	6,563	5	%
State Governments		711	-	%		61	-	%
Local Governments		19,118	13	%		11,923	9	%
Private Companies		126,589	84	%		111,328	86	%
Gross receivables		151,638	100	%		129,875	100	%
Allowance for credit losses		(546)				(323)
Net receivables	$	151,092			$	129,552

Contract revenues

Concentration Risk [Line Items]

Schedules of concentration of risk, by risk factor

	Three months ended September 30,								Nine months ended September 30,
	2022		%		2021		%		2022		%		2021		%
Federal Government	$	15,394	8	%	$	14,716	11	%	$	57,923	11	%	$	39,825	9	%
State Governments		17,836	10	%		400	-	%		39,293	7	%		814	-	%
Local Governments		31,609	17	%		22,765	16	%		90,209	16	%		94,857	22	%
Private Companies		117,782	65	%		102,026	73	%		364,702	66	%		303,595	69	%
Total contract revenues	$	182,621	100	%	$	139,907	100	%	$	552,127	100	%	$	439,091	100	%