Segment Reporting - Summary of Group's Assets and Revenues by Location (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Non-current assets	$ 12,784	$ 15,269
Research collaboration	559	43,114	$ 30,934
Royalties		144	709
Revenue	559	43,258	31,643
UK
Segment Reporting Information [Line Items]
Non-current assets	600	4,103
Research collaboration	559	43,114	30,934
Revenue	559	43,114	30,934
Germany
Segment Reporting Information [Line Items]
Non-current assets	$ 12,184	11,166
Royalties		144	709
Revenue		$ 144	$ 709

Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer.

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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