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Description of Business and Basis of Financial Statements (Details) $ in Thousands	111 Months Ended
	Mar. 31, 2025 USD ($) program	Apr. 30, 2025 employee	Dec. 31, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Number of development programs | program	3
Accumulated deficit	$ (536,872)		$ (511,399)
Proceeds from issuance of private placement	430,900
Cash, cash equivalents and restricted cash	$ 14,304		$ 35,668	$ 97,312	$ 46,674
Subsequent Event
Number of employees | employee		90

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Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

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Amount of accumulated undistributed earnings (deficit).

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