Revenue (Tables)

9 Months Ended

Sep. 30, 2025

Revenue from Contract with Customer [Abstract]

Schedule of Sales by Major Product Line

The following table summarizes the Company’s sales by major product and service line for the periods presented:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2025		2024		2025		2024
Rail Products	$	44,628	$	47,442	$	121,517	$	156,803
Global Friction Management	21,313		19,548		57,307		51,008
Technology Services and Solutions	11,847		12,508		28,952		39,904
Rail, Technologies, and Services	77,788		79,498		207,776		247,715
Precast Concrete Products	43,272		42,688		117,650		97,730
Steel Products	17,226		15,280		54,210		57,137
Infrastructure Solutions	60,498		57,968		171,860		154,867
Total net sales	$	138,286	$	137,466	$	379,636	$	402,582

Schedule of Disaggregation of Revenue

Net sales by the timing of the transfer of goods and services was as follows for the periods presented:

	Three Months Ended September 30, 2025
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	65,152	$	39,621	$	104,773
Over time	12,636		20,877		33,513
Total net sales	$	77,788	$	60,498	$	138,286
	Three Months Ended September 30, 2024
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	62,717	$	33,462	$	96,179
Over time	16,781		24,506		41,287
Total net sales	$	79,498	$	57,968	$	137,466

	Nine Months Ended September 30, 2025
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	176,250	$	109,433	$	285,683
Over time	31,526		62,427		93,953
Total net sales	$	207,776	$	171,860	$	379,636

	Nine Months Ended September 30, 2024
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	198,179	$	98,246	$	296,425
Over time	49,536		56,621		106,157
Total net sales	$	247,715	$	154,867	$	402,582

Revenue recognized over time was as follows for the periods presented:

	Three Months Ended September 30,				Percentage of Total Net Sales Three Months Ended September 30,
	2025		2024		2025		2024
Over time input method	$	6,168	$	15,020	4.5	%	10.9	%
Over time output method	27,345		26,267		19.8		19.1
Total over time sales	$	33,513	$	41,287	24.3	%	30.0	%

	Nine Months Ended September 30,				Percentage of Total Net Sales Nine Months Ended September 30,
	2025		2024		2025		2024
Over time input method	$	20,795	$	42,259	5.5	%	10.5	%
Over time output method	73,158		63,898		19.3		15.9
Total over time sales	$	93,953	$	106,157	24.8	%	26.4	%

Schedule of Contract with Customer, Contract Asset, Contract Liability

The following table sets forth the Company’s contract assets:

	Contract Assets
Balance as of December 31, 2024	$	16,720
Revenue recognized but not yet billed	2,831
Adjustments to contract assets	(3,123)
Transfers from contract asset balance to accounts receivable	(8,485)
Balance as of September 30, 2025	$	7,943

The following table sets forth the Company’s contract liabilities:

	Contract Liabilities
Balance as of December 31, 2024	$	1,991
Revenue recognized from contract liabilities	(1,419)
Increase in billings in excess of cost, excluding revenue recognized	937
Balance as of September 30, 2025	$	1,509