Stockholder's Equity and Share-Based Compensation - Share-based compensation expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based compensation expense	$ 923	$ 1,578	$ 1,781	$ 3,173
Research and development
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based compensation expense	248	725	492	1,543
General and administrative
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based compensation expense	$ 675	$ 853	$ 1,289	$ 1,630

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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+ Details