REVENUE (Tables)

3 Months Ended

Mar. 31, 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 March 31, 2022						Three Months Ended March 31, 2021
	(unaudited)						(unaudited)
	United States and Canada		Other Countries		Total		United States and Canada		Other Countries		Total
Revenue:
IHT	$	93,376	$	2,219	$	95,595	$	89,225	$	1,914	$	91,139
MS	63,931		29,510		93,441		60,046		27,350		87,396
Quest Integrity	14,691		14,849		29,540		9,055		7,028		16,083
Total	$	171,998	$	46,578	$	218,576	$	158,326	$	36,292	$	194,618

	Three Months Ended March 31, 2022
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	76,449	$	24	$	13,839	$	5,283	$	95,595
MS	—		91,770		57		1,614		93,441
Quest Integrity	29,540		—		—		—		29,540
Total	$	105,989	$	91,794	$	13,896	$	6,897	$	218,576

	Three Months Ended March 31, 2021
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	71,530	$	81	$	13,455	$	6,073	$	91,139
MS	—		85,976		689		731		87,396
Quest Integrity	16,083		—		—		—		16,083
Total	$	87,613	$	86,057	$	14,144	$	6,804	$	194,618

Contract with Customer, Asset and Liability

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

	March 31, 2022		December 31, 2021		Change
	(unaudited)
Trade accounts receivable, net1	$	207,779	$	188,772	$	19,007
Contract assets2	$	1,011	$	1,602	$	(591)
Contract liabilities3	$	1,588	$	313	$	1,275

_________________

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