Business Segments - Narrative (Details) $ in Thousands				3 Months Ended		7 Months Ended	12 Months Ended
	Nov. 17, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 30, 2023 USD ($)	Mar. 31, 2024 USD ($) segment	Mar. 31, 2023 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 segment
Segment Reporting Information
Number of reportable segments | segment				2			3
Proceeds from business dispositions				$ 0	$ 5,344
Loss on asset divestiture				0	2,033
Total net sales				124,320	115,488
Other income (expense) - net				3,536	(1,827)
Cougar purchase accounting adjustment
Segment Reporting Information
Consideration transferred to acquire operating assets	$ 1,644
Bridge Grid Deck Product | Discontinued Operations
Segment Reporting Information
Total net sales				810	$ 1,491
Other income (expense) - net				73		$ 1,476
Personnel expenses				$ 111		740
Inventory write-down						474
Other exit costs						$ 262
Rail Products
Segment Reporting Information
Proceeds from business dispositions		$ 2,362
Loss on asset divestiture		$ (1,009)	$ 2,065
Coatings and Measurement
Segment Reporting Information
Proceeds from business dispositions			$ 5,344