Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2023

Revenue From Contract With Customer [Abstract]

Summary of Revenue Disaggregated by Geographical Region and Source of Revenue

In the following tables, revenue is disaggregated by primary geographical region and source of revenue:

	Three Months Ended March 31,
	2023						2022
	U.S.		International		Total		U.S.		International		Total
	(In thousands)
Geographical region
Asia	$	—	$	11,784	$	11,784	$	—	$	7,324	$	7,324
Canada		—		324		324		—		860		860
Europe		—		5,412		5,412		—		3,911		3,911
Latin America		—		1,624		1,624		—		1,606		1,606
U.S.		26,442		—		26,442		24,706		—		24,706
Total revenue	$	26,442	$	19,144	$	45,586	$	24,706	$	13,701	$	38,407
Source of revenue
Energy industrial	$	16,504	$	17,371	$	33,875	$	18,275	$	12,500	$	30,775
Thermal barrier		9,938		1,773		11,711		6,431		1,201		7,632
Total revenue	$	26,442	$	19,144	$	45,586	$	24,706	$	13,701	$	38,407

Summary of Changes in Contract Assets and Contract Liabilities

The following table presents changes in the Company’s contract assets and contract liabilities during the three months ended March 31, 2023:

	Balance at December 31, 2022		Additions		Deductions			Balance at March 31, 2023
	(In thousands)
Contract assets
Thermal barrier	$	143	$	—	$	(143	)	$	—
Total contract assets	$	143	$	—	$	(143	)	$	—
Contract liabilities
Deferred revenue
Energy industrial	$	5,846	$	2,036	$	(3,908	)	$	3,974
Total contract liabilities	$	5,846	$	2,036	$	(3,908	)	$	3,974