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Revenue - Schedule of Disaggregation of Revenue and Schedule of Revenue from External Customers by Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Total	$ 121,865	$ 120,479	$ 238,334	$ 219,426
United States
Disaggregation of Revenue [Line Items]
Total	95,746	85,955	188,862	160,365
North America (outside of United States)
Disaggregation of Revenue [Line Items]
Total	7,303	4,309	12,121	7,720
Pacific Rim
Disaggregation of Revenue [Line Items]
Total	12,379	22,675	26,551	36,516
Europe
Disaggregation of Revenue [Line Items]
Total	3,920	3,637	6,965	6,759
Other
Disaggregation of Revenue [Line Items]
Total	2,517	3,903	3,835	8,066
Power Systems
Disaggregation of Revenue [Line Items]
Total	54,452	46,981	99,086	85,211
Industrial
Disaggregation of Revenue [Line Items]
Total	45,590	58,449	88,465	104,252
Transportation
Disaggregation of Revenue [Line Items]
Total	$ 21,823	$ 15,049	$ 50,783	$ 29,963

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