REVENUE (Tables)

6 Months Ended

Jun. 30, 2022

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

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):

Geographic area:

	Three Months Ended June 30, 2022						Three Months Ended June 30, 2021
	(unaudited)						(unaudited)
	United States and Canada		Other Countries		Total		United States and Canada		Other Countries		Total
Revenue:
IHT	$	111,541	$	2,583	$	114,124	$	114,834	$	2,628	$	117,462
MS	77,683		29,733		107,416		65,303		31,864		97,167
Quest Integrity	18,634		11,091		29,725		16,480		7,764		24,244
Total	$	207,858	$	43,407	$	251,265	$	196,617	$	42,256	$	238,873

	Six Months Ended June 30, 2022						Six Months Ended June 30, 2021
	(unaudited)						(unaudited)
	United States and Canada		Other Countries		Total		United States and Canada		Other Countries		Total
Revenue:
IHT	$	204,919	$	4,802	$	209,721	$	204,059	$	4,542	$	208,601
MS	141,614		59,243		200,857		125,349		59,214		184,563
Quest Integrity	33,324		25,939		59,263		25,535		14,792		40,327
Total	$	379,857	$	89,984	$	469,841	$	354,943	$	78,548	$	433,491

Operating segment and service type:

	Three Months Ended June 30, 2022
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	91,701	$	115	$	15,787	$	6,521	$	114,124
MS	—		106,731		56		629		107,416
Quest Integrity	29,725		—		—		—		29,725
Total	$	121,426	$	106,846	$	15,843	$	7,150	$	251,265

	Three Months Ended June 30, 2021
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	92,291	$	207	$	17,267	$	7,697	$	117,462
MS	—		97,149		8		10		97,167
Quest Integrity	24,244		—		—		—		24,244
Total	$	116,535	$	97,356	$	17,275	$	7,707	$	238,873

	Six Months Ended June 30, 2022
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	168,152	$	139	$	29,626	$	11,804	$	209,721
MS	—		198,501		113		2,243		200,857
Quest Integrity	59,263		—		—		—		59,263
Total	$	227,415	$	198,640	$	29,739	$	14,047	$	469,841

	Six Months Ended June 30, 2021
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	163,820	$	288	$	30,722	$	13,771	$	208,601
MS	—		183,125		697		741		184,563
Quest Integrity	40,327		—		—		—		40,327
Total	$	204,147	$	183,413	$	31,419	$	14,512	$	433,491

Contract with Customer, Asset and Liability

The following table provides information about trade accounts receivable, contract assets and contract liabilities as of June 30, 2022 and December 31, 2021 (in thousands):

	June 30, 2022		December 31, 2021		Change
	(unaudited)
Trade accounts receivable, net1	$	215,408	$	188,772	$	26,636
Contract assets2	$	1,120	$	1,602	$	(482)
Contract liabilities3	$	1,341	$	313	$	1,028

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1    Includes billed and unbilled amounts, net of allowance for credit losses. See Note 3 - Receivables for details.    

2    Included in the “Prepaid expenses and other current assets” line on the condensed consolidated balance sheets.

3    Included in the “Other accrued liabilities” line of the condensed consolidated balance sheets.