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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

X

- 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

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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.

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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

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