Segment Information (Tables)

12 Months Ended

Dec. 31, 2024

Segment Reporting [Abstract]

Schedule of segment reporting

	Year ended December 31,
	2024				2023				2022
	Amount		Percent		Amount		Percent		Amount		Percent
Marine	(dollar amounts in thousands)
Contract revenues	$	521,250	100.0	%	$	395,917	100.0	%	$	339,213	100.0	%
Cost of contract revenues		465,857	89.4	%		355,777	89.9	%		296,594	87.4	%
Gross profit		55,393	10.6	%		40,140	10.1	%		42,619	12.6	%
Selling, general and administrative expenses		54,491	10.5	%		43,307	10.9	%		36,909	10.9	%
Gain on disposal of assets, net		(1,416)	(0.3)	%		(6,837)	(1.7)	%		(4,077)	(1.2)	%
Operating income	$	2,318	0.4	%	$	3,670	0.9	%	$	9,787	2.9	%
Total assets	$	316,199			$	318,684			$	239,369
Property and equipment, net	$	81,342			$	82,215			$	91,390
Depreciation and amortization	$	18,693			$	18,219			$	16,592
Capital expenditures	$	12,187			$	8,375			$	13,323
Concrete
Contract revenues	$	275,144	100.0	%	$	315,861	100.0	%	$	409,109	100.0	%
Cost of contract revenues		239,377	87.0	%		294,338	93.2	%		400,986	98.0	%
Gross profit		35,767	13.0	%		21,523	6.8	%		8,123	2.0	%
Selling, general and administrative expenses		28,046	10.2	%		26,124	8.3	%		25,594	6.3	%
Amortization of intangible assets		—	—	%		427	0.1	%		1,239	0.3	%
Gain on disposal of assets, net		(1,482)	(0.5)	%		(1,618)	(0.5)	%		(893)	(0.2)	%
Intangible asset impairment loss		—	—	%		6,890	2.2	%		—	—	%
Operating income (loss)	$	9,203	3.3	%	$	(10,300)	(3.3)	%	$	(17,817)	(4.4)	%
Total assets	$	101,118			$	98,209			$	127,786
Property and equipment, net	$	4,756			$	5,619			$	9,587
Depreciation and amortization	$	4,072			$	5,659			$	7,465
Capital expenditures	$	1,904			$	534			$	1,261