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Fair Value of Financial Assets and Liabilities
3 Months Ended
Mar. 31, 2022
Fair Value Disclosures [Abstract]  
Fair Value of Financial Assets and Liabilities FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES The following tables present information about the Company’s financial assets and liabilities measured at fair value on a recurring basis and indicate the level of the fair value hierarchy used to determine such fair values:
Fair Value Measurements as of March 31, 2022 Using:
(in thousands)Level 1Level 2Level 3Total
Assets:
Cash equivalents—money market funds$— $2,626 $— $2,626 
$— $2,626 $— $2,626 
Liabilities: 
Embedded derivative liability$— $— $645 $645 
$— $— $645 $645 
Fair Value Measurements as of December 31, 2021 Using:
(in thousands)Level 1Level 2Level 3Total
Assets:
Cash equivalents—money market funds$20,000 $27,793 $— $47,793 
$20,000 $27,793 $— $47,793 
Liabilities:
Embedded derivative liability$— $— $821 $821 
$— $— $821 $821 

The Company’s cash equivalents consisted of money market funds invested in U.S. Treasury securities. The money market funds were valued based on reported market pricing for the identical assets, which represents a Level 1 measurement, or by using inputs observable in active markets for similar securities, which represents a Level 2 measurement.

The following table provides a roll-forward of the aggregate fair values financial instruments for which fair values are determined using Level 3 inputs:
(in thousands)Embedded Derivative Liability
Balance as of December 31, 2021$821 
Change in fair value(176)
Balance as of March 31, 2022$645 
Embedded Derivative Liability The fair value of the embedded derivative liability recognized in connection with the Company’s loan agreement with Hercules (Note 7), which is associated with additional fees due to Hercules upon events of default, was determined based on significant inputs not observable in the market, which represents a Level 3 measurement within the fair value hierarchy. The fair value of this embedded derivative liability, which is reported within other non-current liabilities on the condensed consolidated balance sheets, is estimated by the Company at each reporting date based, in part, on the results of third party valuations, which are prepared based on a discounted cash flow model that considers the timing and probability of occurrence of a redemption upon an event of default, the potential amount of prepayment fees or contingent interest upon an event of default and the Company’s risk-adjusted discount rate of 14%.