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, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Total	$ 110,586	$ 121,865	$ 205,826	$ 238,334
United States
Disaggregation of Revenue [Line Items]
Total	98,490	95,746	180,762	188,862
North America (outside of United States)
Disaggregation of Revenue [Line Items]
Total	5,457	7,303	10,303	12,121
Pacific Rim
Disaggregation of Revenue [Line Items]
Total	5,175	12,379	11,820	26,551
Europe
Disaggregation of Revenue [Line Items]
Total	1,431	3,920	2,891	6,965
Other
Disaggregation of Revenue [Line Items]
Total	33	2,517	50	3,835
Power Systems
Disaggregation of Revenue [Line Items]
Total	73,087	54,452	135,049	99,086
Industrial
Disaggregation of Revenue [Line Items]
Total	31,514	45,590	60,258	88,465
Transportation
Disaggregation of Revenue [Line Items]
Total	$ 5,985	$ 21,823	$ 10,519	$ 50,783