REVENUE (Tables)

6 Months Ended

Jun. 30, 2025

Revenue from Contract with Customer [Abstract]

Summary of Disaggregation of Revenue

A disaggregation of our revenue from customer contracts by geographic region, by reportable operating segment and by service type is presented below:

Geographic area (in thousands):

	Three Months Ended June 30, 2025
	(unaudited)
	United States		Canada		Other Countries		Total
Revenue:
IHT	$	111,987	$	15,112	$	3,297	$	130,396
MS	72,299		10,312		35,019		117,630
Total	$	184,286	$	25,424	$	38,316	$	248,026

	Three Months Ended June 30, 2024
	(unaudited)
	United States		Canada		Other Countries		Total
Revenue:
IHT	$	98,712	$	11,499	$	3,023	$	113,234
MS	67,828		11,299		36,257		115,384
Total	$	166,540	$	22,798	$	39,280	$	228,618

	Six Months Ended June 30, 2025
	(unaudited)
	United States		Canada		Other Countries		Total
Revenue:
IHT	$	208,384	$	22,224	$	6,003	$	236,611
MS	133,276		15,407		61,387		210,070
Total	$	341,660	$	37,631	$	67,390	$	446,681

	Six Months Ended June 30, 2024
	(unaudited)
	United States		Canada		Other Countries		Total
Revenue:
IHT	$	187,287	$	19,220	$	6,175	$	212,682
MS	132,130		15,967		67,439		215,536
Total	$	319,417	$	35,187	$	73,614	$	428,218

Operating segment and service type (in thousands):

	Three Months Ended June 30, 2025
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	100,637	$	51	$	21,922	$	7,786	$	130,396
MS	—		117,054		149		427		117,630
Total	$	100,637	$	117,105	$	22,071	$	8,213	$	248,026

	Three Months Ended June 30, 2024
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	90,113	$	2	$	17,459	$	5,660	$	113,234
MS	—		112,873		248		2,263		115,384
Total	$	90,113	$	112,875	$	17,707	$	7,923	$	228,618

	Six Months Ended June 30, 2025
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	185,081	$	52	$	38,294	$	13,184	$	236,611
MS	—		208,341		338		1,391		210,070
Total	$	185,081	$	208,393	$	38,632	$	14,575	$	446,681

	Six Months Ended June 30, 2024
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	171,123	$	147	$	30,943	$	10,469	$	212,682
MS	—		211,736		355		3,445		215,536
Total	$	171,123	$	211,883	$	31,298	$	13,914	$	428,218