Revenue - Schedule of Disaggregation of Revenue and Schedule of Revenue from External Customers by Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Total	$ 115,884	$ 124,900	$ 354,218	$ 344,326
United States
Disaggregation of Revenue [Line Items]
Total	96,899	89,661	285,761	250,026
North America (outside of United States)
Disaggregation of Revenue [Line Items]
Total	4,484	2,903	16,605	10,623
Pacific Rim
Disaggregation of Revenue [Line Items]
Total	9,485	20,083	36,036	56,599
Europe
Disaggregation of Revenue [Line Items]
Total	4,273	7,028	11,238	13,787
Other
Disaggregation of Revenue [Line Items]
Total	743	5,225	4,578	13,291
Power Systems
Disaggregation of Revenue [Line Items]
Total	60,405	42,693	159,491	127,904
Industrial
Disaggregation of Revenue [Line Items]
Total	40,354	59,419	128,819	163,671
Transportation
Disaggregation of Revenue [Line Items]
Total	$ 15,125	$ 22,788	$ 65,908	$ 52,751