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Fair Value Measurement of Assets and Liabilities (Tables)
12 Months Ended
Dec. 31, 2022
Fair Value Disclosures [Abstract]  
Schedule of Financial Instruments Measured at Fair Value on Recurring Basis
The following table summarizes the Company’s financial instruments measured at fair value on a recurring basis as of December 31, 2022 and 2021 (in thousands):
December 31, 2022December 31, 2021
Total Fair ValueLevel 3Level 1Total Fair ValueLevel 3Level 1
Assets
Cash equivalents
Money market funds$— $— $— $126 $— $126 
Total assets$— $— $— $126 $— $126 
Liabilities
2025 Notes
     Interest make-whole payment$— $— $— $926 $926 $— 
        Total liabilities$— $— $— $926 $926 $— 
During the years ended December 31, 2022 and 2021, there were no transfers between the levels within the fair value hierarchy.
Schedule of Fair Value Valuation Model and Assumptions
The fair value of the interest make-whole payment derivative liability was determined using a Monte Carlo model with the following key assumptions:
December 31, 2022December 31, 2021
Volatility50 %50 %
Stock price
$0.84 per share
$5.83 per share
Credit spread56.52 %15.93 %
Term2.34 years3.34 years
Dividend yield— %— %
Risk-free rate4.35 %1.02 %