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Equity-based Compensation - Compensation expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Equity-based Compensation
Total equity-based compensation	$ 621	$ 1,147	$ 1,207	$ 2,318
Total unrecognized compensation cost related to options	2,827		$ 2,827
Weighted average period over which the unrecognized compensation cost is expected to be recognized			2 years 6 months 21 days
Performance-based awards
Equity-based Compensation
Total unrecognized compensation cost related to options	155		$ 155
Weighted average period over which the unrecognized compensation cost is expected to be recognized			4 months 24 days
Research and development
Equity-based Compensation
Total equity-based compensation	331	282	$ 641	513
General and administrative
Equity-based Compensation
Total equity-based compensation	$ 290	$ 865	$ 566	$ 1,805

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

Amount of cost to be recognized for option under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Subparagraph (i)
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-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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