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Fair Value Measurement - Classification by level of input within the fair value hierarchy (Details) - Recurring basis - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Liabilities |  |
Derivative liability - Class A Common Stock warrants | $ 179 | $ 271
Warrant liability - Series m-3 Preferred Stock |  |
Liabilities |  |
Warrant liability | 212 | 284
Warrant liability - Series s Preferred Stock |  |
Liabilities |  |
Warrant liability | 5,086 | 5,692
Money market funds |  |
Assets |  |
Money market funds | 1,107 | 1,104
Level 1 | Money market funds |  |
Assets |  |
Money market funds | 1,107 | 1,104
Level 3 |  |
Liabilities |  |
Derivative liability - Class A Common Stock warrants | 179 | 271
Level 3 | Warrant liability - Series m-3 Preferred Stock |  |
Liabilities |  |
Warrant liability | 212 | 284
Level 3 | Warrant liability - Series s Preferred Stock |  |
Liabilities |  |
Warrant liability | $ 5,086 | $ 5,692

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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlying, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References No definition available. + Details
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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 No definition available. + Details
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- Definition Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. + References No definition available. + Details
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