REVENUE - Disaggregation of Revenue by Major Products and Services Lines (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation Of Revenue [Line Items]
Revenues	$ 46,747	$ 34,098	$ 129,734	$ 104,665
Product [Member]
Disaggregation Of Revenue [Line Items]
Revenues	39,092	29,569	110,383	91,867
Transportation [Member]
Disaggregation Of Revenue [Line Items]
Revenues	5,022	3,294	13,878	9,277
License fees from Construction Partners [Member]
Disaggregation Of Revenue [Line Items]
Revenues	193	191	588	539
Total product revenue [Member]
Disaggregation Of Revenue [Line Items]
Revenues	44,307	33,054	124,849	101,683
Installation and other services [Member]
Disaggregation Of Revenue [Line Items]
Revenues	$ 2,440	$ 1,044	$ 4,885	$ 2,982