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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, 2023	Dec. 31, 2022
Liabilities
Derivative liability - Class A common stock warrants	$ 467	$ 1,146
2022 Convertible Notes	4,432	8,152
Warrant liability - Series m-3 Preferred Stock
Liabilities
Warrant liability	514	1,282
Warrant liability - Series s Preferred Stock
Liabilities
Warrant liability	5,554	8,729
Money market funds
Assets
Money market funds	100	3,025
Level 1 | Money market funds
Assets
Money market funds	100	3,025
Level 3
Liabilities
Derivative liability - Class A common stock warrants	467	1,146
2022 Convertible Notes	4,432	8,152
Level 3 | Warrant liability - Series m-3 Preferred Stock
Liabilities
Warrant liability	514	1,282
Level 3 | Warrant liability - Series s Preferred Stock
Liabilities
Warrant liability	$ 5,554	$ 8,729

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.

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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

Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

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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.

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