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Related Party Transactions (Details) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
Related Party Transactions (Details) $ in Thousands	Oct. 21, 2024 item shares	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($) item shares	Jun. 30, 2025 USD ($)	Dec. 31, 2025 USD ($) item	Dec. 31, 2024 USD ($) item	Nov. 03, 2024 USD ($)
Related Party Transactions.
Revenue from Related Parties		$ (268)	$ 7,540	$ 2,805	$ 13,556
Cost of services		2,119	8,462	5,667	11,158
Number of Participants \| item						2
Dahae Energy Co., Ltd
Related Party Transactions.
Cost of services		914	2,884	$ 1,671	4,285
Number of Participants \| item				2			2
Restricted stock \| Share Based Payment Arrangement Non Employee
Related Party Transactions.
Number of Participants \| item	2
Granted \| shares	298,508
Vested \| shares				186,847
Related Party \| BMW
Related Party Transactions.
Revenue subject to achieving certain milestones				$ 20,000
Revenue from Related Parties		0	0	0	0
Equity Method Investment, Change In Income		$ 92	$ 0	$ 92	$ 132
Equity method investee \| Dahae Energy Co., Ltd
Related Party Transactions.
Ownership percentage, equity method		20.00%		20.00%			20.00%
Equity method investee \| Dahae Energy Co., Ltd
Related Party Transactions.
Payments made to acquire equity method investments							$ 656
Transaction costs							256
Equity method investee \| Corporate Bonds \| Dahae Energy Co., Ltd
Related Party Transactions.
Debt discount		$ 1,726		$ 1,726		$ 1,796
Equity method investee \| Warrants \| Dahae Energy Co., Ltd
Related Party Transactions.
Impairment on warrants				0		0
Fair value of the bond							$ 607
Remeasurement of restricted stock awards				23		$ 323
Equity method investee \| Term loan facility \| Dahae Energy Co., Ltd
Related Party Transactions.
Principal amount								$ 1,161
Interest rate								3.00%
Equity method investee \| Additional Term Loan Facility \| Dahae Energy Co., Ltd
Related Party Transactions.
Amount of additional financing		$ 2,000		$ 2,000				$ 2,000
Equity method investee \| Restricted stock \| Dahae Energy Co., Ltd
Related Party Transactions.
Granted \| shares				298,508
Equity method investee \| On exercise of warrants \| Warrants \| Dahae Energy Co., Ltd
Related Party Transactions.
Ownership percentage, equity method							40.00%