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Fair Value Measurement of Assets and Liabilities (Tables)
9 Months Ended
Sep. 30, 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 September 30, 2022 and December 31, 2021 (in thousands):
September 30, 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$24 $24 $— $926 $926 $— 
        Total liabilities$24 $24 $— $926 $926 $— 
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 using the following key assumptions:
September 30, 2022December 31, 2021
Volatility50 %50 %
Stock price
$2.07 per share
$5.83 per share
Credit spread30.78 %15.93 %
Term2.59 years3.34 years
Dividend yield— %— %
Risk-free rate4.24 %1.02 %
No