REVENUE

12 Months Ended

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

REVENUE

REVENUE

Disaggregation of revenue. Essentially all of our revenues are associated with contracts with customers. A disaggregation of our revenue from contracts with customers by geographic region, by reportable operating segment and by service type is presented below (in thousands):

	Twelve Months Ended December 31, 2023
	United States and Canada		Other Countries		Total
Revenue:
IHT	$	414,515	$	15,044	$	429,559
MS	294,118		138,938		433,056
Total	$	708,633	$	153,982	$	862,615

	Twelve Months Ended December 31, 2022
	United States and Canada		Other Countries		Total
Revenue:
IHT	$	412,661	$	9,901	$	422,562
MS	296,151		121,495		417,646
Total	$	708,812	$	131,396	$	840,208

	Twelve Months Ended December 31, 2023
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	343,713	$	275	$	59,399	$	26,172	$	429,559
MS	—		429,480		702		2,874		433,056
Total	$	343,713	$	429,755	$	60,101	$	29,046	$	862,615

	Twelve Months Ended December 31, 2022
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	336,821	$	180	$	61,526	$	24,035	$	422,562
MS	—		413,424		276		3,946		417,646
Total	$	336,821	$	413,604	$	61,802	$	27,981	$	840,208

For additional information on our reportable operating segments and geographic information, refer to Note 17 - Segment and Geographic Disclosures.

Remaining performance obligations. As permitted by ASC 606, Revenue from Contracts with Customers, we have elected not to disclose information about remaining performance obligations where (i) the performance obligation is part of a contract that has an original expected duration of one year or less or (ii) when we recognize revenue from the satisfaction of the performance obligation in accordance with the right-to-invoice practical expedient, which permits us to recognize revenue in the amount to which we have a right to invoice the customer if that amount corresponds directly with the value to the customer of our performance completed to date. As most of our contracts with customers are short-term in nature and billed on a time and material basis, there were no material amounts of remaining performance obligations as of December 31, 2023 and 2022.