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Related Party Transactions - Equity method investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Related Party Transactions.
Loan	$ 4,398	$ 4,267
Mezzanine Equity	470	34
Currency translation adjustment	24
Interest income	13,204	17,671
Share of net loss (income) of equity method investee	65	(133)
Dahae Energy Co., Ltd
Related Party Transactions.
Direct costs	12,461	9,342
Accrued costs to be paid	4,540
Dahae Energy Co., Ltd | Equity method investee
Related Party Transactions.
Bond	3,236	3,105
Loan	1,161	1,161
Warrants	607	607
Equity Method Investment	724	520
Mezzanine Equity	470	34
Fair value of embedded derivative	584
Change in equity method investment	179
Interest income	299	105
Share of net loss (income) of equity method investee	(65)	133
Other comprehensive income	$ 24	$ 25

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