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Revenue - Disaggregated Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 184,442	$ 168,016
United States
Disaggregation of Revenue [Line Items]
Revenue	129,839	122,112
Other Americas
Disaggregation of Revenue [Line Items]
Revenue	19,361	17,653
Europe
Disaggregation of Revenue [Line Items]
Revenue	30,121	25,030
Asia-Pacific
Disaggregation of Revenue [Line Items]
Revenue	5,121	3,221
Oil & Gas
Disaggregation of Revenue [Line Items]
Revenue	113,165	98,665
Aerospace & Defense
Disaggregation of Revenue [Line Items]
Revenue	22,118	18,602
Industrials
Disaggregation of Revenue [Line Items]
Revenue	15,199	15,913
Power generation & Transmission
Disaggregation of Revenue [Line Items]
Revenue	5,852	7,970
Other Process Industries
Disaggregation of Revenue [Line Items]
Revenue	11,900	12,373
Infrastructure, Research & Engineering
Disaggregation of Revenue [Line Items]
Revenue	6,586	5,761
Petrochemical
Disaggregation of Revenue [Line Items]
Revenue	4,344	5,282
Other
Disaggregation of Revenue [Line Items]
Revenue	5,278	3,450
Operating segments | North America
Disaggregation of Revenue [Line Items]
Revenue	150,349	136,932
Operating segments | North America | United States
Disaggregation of Revenue [Line Items]
Revenue	129,458	120,600
Operating segments | North America | Other Americas
Disaggregation of Revenue [Line Items]
Revenue	17,127	14,270
Operating segments | North America | Europe
Disaggregation of Revenue [Line Items]
Revenue	1,153	1,412
Operating segments | North America | Asia-Pacific
Disaggregation of Revenue [Line Items]
Revenue	2,611	650
Operating segments | North America | Oil & Gas
Disaggregation of Revenue [Line Items]
Revenue	103,027	89,773
Operating segments | North America | Aerospace & Defense
Disaggregation of Revenue [Line Items]
Revenue	15,375	13,611
Operating segments | North America | Industrials
Disaggregation of Revenue [Line Items]
Revenue	8,909	9,302
Operating segments | North America | Power generation & Transmission
Disaggregation of Revenue [Line Items]
Revenue	3,592	4,987
Operating segments | North America | Other Process Industries
Disaggregation of Revenue [Line Items]
Revenue	7,928	9,109
Operating segments | North America | Infrastructure, Research & Engineering
Disaggregation of Revenue [Line Items]
Revenue	3,972	2,483
Operating segments | North America | Petrochemical
Disaggregation of Revenue [Line Items]
Revenue	3,813	5,137
Operating segments | North America | Other
Disaggregation of Revenue [Line Items]
Revenue	3,733	2,530
Operating segments | International
Disaggregation of Revenue [Line Items]
Revenue	33,047	29,407
Operating segments | International | United States
Disaggregation of Revenue [Line Items]
Revenue	296	309
Operating segments | International | Other Americas
Disaggregation of Revenue [Line Items]
Revenue	2,295	3,489
Operating segments | International | Europe
Disaggregation of Revenue [Line Items]
Revenue	28,663	24,183
Operating segments | International | Asia-Pacific
Disaggregation of Revenue [Line Items]
Revenue	1,793	1,426
Operating segments | International | Oil & Gas
Disaggregation of Revenue [Line Items]
Revenue	10,066	8,855
Operating segments | International | Aerospace & Defense
Disaggregation of Revenue [Line Items]
Revenue	6,732	4,980
Operating segments | International | Industrials
Disaggregation of Revenue [Line Items]
Revenue	5,853	6,053
Operating segments | International | Power generation & Transmission
Disaggregation of Revenue [Line Items]
Revenue	1,682	1,657
Operating segments | International | Other Process Industries
Disaggregation of Revenue [Line Items]
Revenue	3,933	3,237
Operating segments | International | Infrastructure, Research & Engineering
Disaggregation of Revenue [Line Items]
Revenue	2,205	2,136
Operating segments | International | Petrochemical
Disaggregation of Revenue [Line Items]
Revenue	531	145
Operating segments | International | Other
Disaggregation of Revenue [Line Items]
Revenue	2,045	2,344
Operating segments | Products & Systems
Disaggregation of Revenue [Line Items]
Revenue	3,210	3,739
Operating segments | Products & Systems | United States
Disaggregation of Revenue [Line Items]
Revenue	1,600	1,801
Operating segments | Products & Systems | Other Americas
Disaggregation of Revenue [Line Items]
Revenue	177	326
Operating segments | Products & Systems | Europe
Disaggregation of Revenue [Line Items]
Revenue	651	261
Operating segments | Products & Systems | Asia-Pacific
Disaggregation of Revenue [Line Items]
Revenue	782	1,351
Operating segments | Products & Systems | Oil & Gas
Disaggregation of Revenue [Line Items]
Revenue	72	37
Operating segments | Products & Systems | Aerospace & Defense
Disaggregation of Revenue [Line Items]
Revenue	11	11
Operating segments | Products & Systems | Industrials
Disaggregation of Revenue [Line Items]
Revenue	437	558
Operating segments | Products & Systems | Power generation & Transmission
Disaggregation of Revenue [Line Items]
Revenue	578	1,326
Operating segments | Products & Systems | Other Process Industries
Disaggregation of Revenue [Line Items]
Revenue	39	27
Operating segments | Products & Systems | Infrastructure, Research & Engineering
Disaggregation of Revenue [Line Items]
Revenue	409	1,142
Operating segments | Products & Systems | Petrochemical
Disaggregation of Revenue [Line Items]
Revenue	0	0
Operating segments | Products & Systems | Other
Disaggregation of Revenue [Line Items]
Revenue	1,664	638
Corp/Elim
Disaggregation of Revenue [Line Items]
Revenue	(2,164)	(2,062)
Corp/Elim | United States
Disaggregation of Revenue [Line Items]
Revenue	(1,515)	(598)
Corp/Elim | Other Americas
Disaggregation of Revenue [Line Items]
Revenue	(238)	(432)
Corp/Elim | Europe
Disaggregation of Revenue [Line Items]
Revenue	(346)	(826)
Corp/Elim | Asia-Pacific
Disaggregation of Revenue [Line Items]
Revenue	(65)	(206)
Corp/Elim | Oil & Gas
Disaggregation of Revenue [Line Items]
Revenue	0	0
Corp/Elim | Aerospace & Defense
Disaggregation of Revenue [Line Items]
Revenue	0	0
Corp/Elim | Industrials
Disaggregation of Revenue [Line Items]
Revenue	0	0
Corp/Elim | Power generation & Transmission
Disaggregation of Revenue [Line Items]
Revenue	0	0
Corp/Elim | Other Process Industries
Disaggregation of Revenue [Line Items]
Revenue	0	0
Corp/Elim | Infrastructure, Research & Engineering
Disaggregation of Revenue [Line Items]
Revenue	0	0
Corp/Elim | Petrochemical
Disaggregation of Revenue [Line Items]
Revenue	0	0
Corp/Elim | Other
Disaggregation of Revenue [Line Items]
Revenue	$ (2,164)	$ (2,062)

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