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Fair Value Measurements - Hierarchy (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Fair value assets and liabilities |  |
Warrant derivative liability | $ 3,274 | $ 6,633
Level 1 |  |
Fair value assets and liabilities |  |
Fair value money market accounts | 30,310 | 29,036
Recurring |  |
Fair value assets and liabilities |  |
Warrant derivative liability | 3,274 | 6,633
Recurring | BTI Warrants |  |
Fair value assets and liabilities |  |
Warrant derivative liability | 3,236 | 6,593
Recurring | OnkosXcel Warrants |  |
Fair value assets and liabilities |  |
Warrant derivative liability | 38 | 40
Recurring | Level 2 |  |
Fair value assets and liabilities |  |
Warrant derivative liability | 1,834 | 6,593
Recurring | Level 2 | BTI Warrants |  |
Fair value assets and liabilities |  |
Warrant derivative liability | 1,834 | 6,593
Recurring | Level 3 |  |
Fair value assets and liabilities |  |
Warrant derivative liability | 1,440 | 40
Recurring | Level 3 | BTI Warrants |  |
Fair value assets and liabilities |  |
Warrant derivative liability | 1,402 |
Recurring | Level 3 | OnkosXcel Warrants |  |
Fair value assets and liabilities |  |
Warrant derivative liability | 38 | 40
Recurring | Fair Value |  |
Fair value assets and liabilities |  |
Warrant derivative liability | 3,274 | 6,633
Recurring | Fair Value | BTI Warrants |  |
Fair value assets and liabilities |  |
Warrant derivative liability | 3,236 | 6,593
Recurring | Fair Value | OnkosXcel Warrants |  |
Fair value assets and liabilities |  |
Warrant derivative liability | $ 38 | $ 40

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes 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. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483466/210-20-50-3 + Details
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