REVENUE - Disaggregation of Revenue by Major Products and Services Lines (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation Of Revenue [Line Items]
Revenue	$ 40,310	$ 38,922	$ 82,742	$ 80,217
Product [Member]
Disaggregation Of Revenue [Line Items]
Revenue	34,466	33,475	70,772	69,699
Transportation [Member]
Disaggregation Of Revenue [Line Items]
Revenue	4,229	4,091	8,521	8,029
License fees from Construction Partners [Member]
Disaggregation Of Revenue [Line Items]
Revenue	196	175	414	359
Total product revenue [Member]
Disaggregation Of Revenue [Line Items]
Revenue	38,891	37,741	79,707	78,087
Installation and other services [Member]
Disaggregation Of Revenue [Line Items]
Revenue	$ 1,419	$ 1,181	$ 3,035	$ 2,130

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details