Revenue (Tables)

6 Months Ended

Jun. 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 June 30,				Six Months Ended June 30,
	2025		2024		2025		2024
Rail Products	$	47,570	$	56,323	$	76,889	$	109,361
Global Friction Management	20,431		17,438		35,994		31,459
Technology Services and Solutions	7,972		11,833		17,105		27,397
Rail, Technologies, and Services	75,973		85,594		129,988		168,217
Precast Concrete Products	46,174		33,950		74,378		55,041
Steel Products	21,411		21,252		36,984		41,858
Infrastructure Solutions	67,585		55,202		111,362		96,899
Total net sales	$	143,558	$	140,796	$	241,350	$	265,116

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 June 30, 2025
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	66,173	$	41,185	$	107,358
Over time	9,800		26,400		36,200
Total net sales	$	75,973	$	67,585	$	143,558
	Three Months Ended June 30, 2024
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	69,923	$	35,127	$	105,050
Over time	15,671		20,075		35,746
Total net sales	$	85,594	$	55,202	$	140,796

	Six Months Ended June 30, 2025
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	111,098	$	69,812	$	180,910
Over time	18,890		41,550		60,440
Total net sales	$	129,988	$	111,362	$	241,350

	Six Months Ended June 30, 2024
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	135,462	$	64,784	$	200,246
Over time	32,755		32,115		64,870
Total net sales	$	168,217	$	96,899	$	265,116

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

	Three Months Ended June 30,				Percentage of Total Net Sales Three Months Ended June 30,
	2025		2024		2025		2024
Over time input method	$	6,884	$	14,096	4.8	%	10.0	%
Over time output method	29,316		21,650		20.4		15.4
Total over time sales	$	36,200	$	35,746	25.2	%	25.4	%

	Six Months Ended June 30,				Percentage of Total Net Sales Six Months Ended June 30,
	2025		2024		2025		2024
Over time input method	$	14,627	$	27,239	6.1	%	10.3	%
Over time output method	45,813		37,631		19.0		14.2
Total over time sales	$	60,440	$	64,870	25.1	%	24.5	%

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
Net additions to contract assets	2,872
Transfers from contract asset balance to accounts receivable	(6,620)
Balance as of June 30, 2025	$	12,972

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	(1,341)
Increase in billings in excess of cost, excluding revenue recognized	1,707
Balance as of June 30, 2025	$	2,357