Segment Information - Summary of Revenue and Segment Operating Profit (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenue	$ 238,718	$ 180,364	$ 121,622
Segment Operating Profit (Loss)	56,921	4,976	9,937
Corporate expenses	106,124	84,221	50,536
Operating loss	(49,203)	(79,245)	(40,599)
Other expense, net	3,392	(3,493)	3,505
Net loss	(45,811)	(82,738)	(37,094)
Depreciation expense	15,318	9,222	9,440
Total assets	703,048	643,416
Construction in Progress [Member]
Segment Reporting Information [Line Items]
Total assets	314,678	209,050
All Other Corporate Assets [Member]
Segment Reporting Information [Line Items]
Total assets	176,637	300,631
Operating Segment
Segment Reporting Information [Line Items]
Depreciation expense	15,318	9,222	9,440
Total assets	211,733	133,735
Operating Segment | Energy Industrial [Member]
Segment Reporting Information [Line Items]
Revenue	128,639	124,807	114,958
Segment Operating Profit (Loss)	34,162	18,844	14,486
Depreciation expense	10,720	8,476	9,440
Total assets	93,168	94,415
Operating Segment | Thermal Barrier [Member]
Segment Reporting Information [Line Items]
Revenue	110,079	55,557	6,664
Segment Operating Profit (Loss)	22,759	(13,868)	$ (4,549)
Depreciation expense	4,598	746
Total assets	$ 118,565	$ 39,320