v3.26.1
REVENUE
 3 Months Ended
Mar. 31, 2026
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 customer contracts by geographic region, by reportable operating segment and by service type is presented below:
Revenue by geographic area (in thousands):
Three Months Ended March 31, 2026
(unaudited)
United StatesCanadaOther CountriesTotal
Revenue1:
IHT$110,342 $9,267 $3,782 $123,391 
MS55,981 7,290 28,394 91,665 
Total$166,323 $16,557 $32,176 $215,056 
Three Months Ended March 31, 2025
(unaudited)
United StatesCanadaOther CountriesTotal
Revenue1:
IHT$103,803 $7,112 $2,706 $113,621 
MS53,571 5,095 26,368 85,034 
Total$157,374 $12,207 $29,074 $198,655 
1 As of January 1, 2026, Emission Control Services (ECS), previously included in the MS segment, was moved to the IHT segment, refer to Note 15 - Segment Disclosures for more information.

Revenue by operating segment and service type (in thousands):
Three Months Ended March 31, 2026
(unaudited)
Non-Destructive Evaluation and Testing Services
Repair and Maintenance Services
Heat-TreatingOtherTotal
Revenue1:
IHT$104,076 $8 $16,653 $2,654 $123,391 
MS— 90,427 19 1,219 91,665 
Total$104,076 $90,435 $16,672 $3,873 $215,056 
Three Months Ended March 31, 2025
(unaudited)
Non-Destructive Evaluation and Testing Services
Repair and Maintenance Services
Heat-TreatingOtherTotal
Revenue1:
IHT$94,644 $1 $16,374 $2,602 $113,621 
MS— 83,881 189 964 85,034 
Total$94,644 $83,882 $16,563 $3,566 $198,655 
1 As of January 1, 2026, ECS, previously included in the MS segment, was moved to the IHT segment, refer to Note 15 - Segment Disclosures for more information.
For additional information on our reportable operating segments, refer to Note 15 - Segment 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 March 31, 2026 and December 31, 2025.