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Related Party Transactions - Narrative (Details) - USD ($)		3 Months Ended		9 Months Ended
	Aug. 14, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Related Party Transaction [Line Items]
Due to related parties		$ 8,222,000		$ 8,222,000		$ 6,537,000
Asset Purchase Commitment
Related Party Transaction [Line Items]
Unrecorded unconditional purchase obligation, weighted average share price (in dollars per share)		$ 4.00		$ 4.00
Joint Development Agreements
Related Party Transaction [Line Items]
Unrecorded unconditional purchase obligation, threshold trading days				10 days
Unrecorded unconditional purchase obligation, weighted average share price (in dollars per share)		$ 4.00		$ 4.00
BHES
Related Party Transaction [Line Items]
Gain (loss) on stock issued during period, value, issued for services				$ (17,500,000)
Gain (loss) on stock issued during period, value, issued for services, inception-to-date				(13,500,000)
BHES | Purchase Of KPEP Long Lead Time Items
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction				41,500,000
BHES | Purchase Of Lube Oil System
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction	$ 1,600,000
Contractual obligation		$ 200,000		200,000
Related Party
Related Party Transaction [Line Items]
Due to related parties		8,200,000		8,200,000		$ 6,500,000
Related Party | BHES
Related Party Transaction [Line Items]
Due to related parties		500,000		500,000
Related party transaction, amounts of transaction		$ 1,000,000.0	$ 0	$ 4,900,000	$ 0

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