REVENUE - Disaggregation of Revenue by Major Products and Services Lines (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation Of Revenue [Line Items]
Revenue	$ 168,855	$ 174,313	$ 181,931
Product [Member]
Disaggregation Of Revenue [Line Items]
Revenue	146,352	152,856	158,405
Transportation [Member]
Disaggregation Of Revenue [Line Items]
Revenue	16,987	16,066	17,674
License fees from Construction Partners [Member]
Disaggregation Of Revenue [Line Items]
Revenue	719	738	840
Total product revenue [Member]
Disaggregation Of Revenue [Line Items]
Revenue	164,058	169,660	176,919
Installation and other services [Member]
Disaggregation Of Revenue [Line Items]
Revenue	$ 4,797	$ 4,653	$ 5,012