Segments, Geographical Information, Concentrations and Significant Customers - Revenue by geography (Details) - Single reportable segment - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segments, Geographical Information, Concentrations and Significant Customers
Total revenue	$ 5,138	$ 1,801	$ 9,538	$ 3,273
Revenue \| Revenue from Rights Concentration Risk \| United States
Segments, Geographical Information, Concentrations and Significant Customers
Total revenue	4,133	967	4,911	1,352
Revenue \| Revenue from Rights Concentration Risk \| Europe
Segments, Geographical Information, Concentrations and Significant Customers
Total revenue	175	771	767	1,784
Revenue \| Revenue from Rights Concentration Risk \| Asia and other
Segments, Geographical Information, Concentrations and Significant Customers
Total revenue	$ 830	$ 63	$ 3,860	$ 137

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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