Summary of Significant Accounting Policies - Narrative (Details)						12 Months Ended
	Nov. 17, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 30, 2023 USD ($)	Aug. 01, 2022 USD ($)	Jun. 21, 2022 USD ($)	Dec. 31, 2023 USD ($) segment facility	Dec. 31, 2022 USD ($) segment	Aug. 12, 2022 USD ($)
Property, Plant and Equipment
Number of operating segments | segment						2	3
Cash and cash equivalents						$ 2,560,000	$ 2,882,000
Impairments of property, plant, and equipment						0	0
Product warranty reserve						688,000	870,000
Foreign currency transaction gain (loss)						(77,000)	(434,000)
Research and development expenses						2,555,000	2,219,000
Reduction in other expense (income)						(2,635,000)	1,550,000
Decrease in current assets						(167,355,000)	(205,732,000)
Decrease in property, plant and equipment						(75,579,000)	(85,344,000)
Increase in other assets						2,965,000	2,379,000
Decrease in accounts payable						(39,500,000)	(48,782,000)
Decrease in net cash provided by operating activities						(36,956,000)	10,576,000
Increase in net cash provided by investing activities						2,486,000	(56,418,000)
As Previously Reported
Property, Plant and Equipment
Cash and cash equivalents						2,560,000
Reduction in other expense (income)						(3,666,000)
Decrease in current assets						(167,990,000)
Decrease in property, plant and equipment						(75,999,000)
Increase in other assets						2,715,000
Decrease in accounts payable						(40,305,000)
Decrease in net cash provided by operating activities						(37,376,000)
Increase in net cash provided by investing activities						2,066,000
As Previously Reported | Other Nonoperating Income (Expense)
Property, Plant and Equipment
Loss on asset divestitures						1,403,000
Adjustments
Property, Plant and Equipment
Cash and cash equivalents						0
Reduction in other expense (income)						1,031,000
Decrease in current assets						635,000
Decrease in property, plant and equipment						420,000
Increase in other assets						250,000
Decrease in accounts payable						805,000
Decrease in net cash provided by operating activities						420,000
Increase in net cash provided by investing activities						$ 420,000
Cougar Mountain Precast, LLC
Property, Plant and Equipment
Consideration transferred to acquire operating assets	$ 1,644,000
Buildings | Minimum
Property, Plant and Equipment
Property, plant and equipment useful life						10 years
Buildings | Maximum
Property, Plant and Equipment
Property, plant and equipment useful life						41 years
Machinery and equipment | Minimum
Property, Plant and Equipment
Property, plant and equipment useful life						2 years
Machinery and equipment | Maximum
Property, Plant and Equipment
Property, plant and equipment useful life						50 years
Leasehold improvements | Minimum
Property, Plant and Equipment
Property, plant and equipment useful life						4 years
Leasehold improvements | Maximum
Property, Plant and Equipment
Property, plant and equipment useful life						19 years
Non Domestic
Property, Plant and Equipment
Cash and cash equivalents						$ 2,193,000	$ 2,012,000
Skratch
Property, Plant and Equipment
Business combination, stock acquire					$ 7,402,000
Business combination, deferred consideration					$ 1,228,000
Business combination, term for payment of deferred consideration					5 years
VanHooseCo
Property, Plant and Equipment
Business combination, stock acquire								$ 52,146,000
Escrow deposit								$ 2,500,000
Rail Products Business Unit
Property, Plant and Equipment
Proceeds from divestiture of assets		$ 2,362,000		$ 7,795,000
Coatings and Measurement
Property, Plant and Equipment
Proceeds from divestiture of assets			$ 5,344,000
Precast Concrete Products
Property, Plant and Equipment
Number of manufacturing facilities | facility						9