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Fair Value Measurements
12 Months Ended
Dec. 31, 2021
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
There are no financial instruments measured at fair value on a recurring basis as of December 31, 2021 and 2020. Management believes that the carrying amounts of the Company’s consolidated financial instruments, including accounts payable and accrued expenses approximate fair value due to the short-term nature of those instruments.
The Company elected the fair value option to account for its convertible notes issued during 2019 (See Note 8). The fair value of the convertible notes was determined based on significant inputs not observable in the market, which represents a level 3 measurement within the fair value hierarchy.
The Company recorded a loss of $1.8 million and $1.1 million for changes in the fair value of the convertible notes in the consolidated statements of operations and comprehensive loss for the years ended December 31, 2020 and 2019, respectively.
The following table provides a roll forward of the aggregate fair value of the Company’s convertible notes, for which fair value was determined using level 3 inputs (in thousands):
Convertible notes
Balance as of December 31, 2018$— 
Issuance of convertible notes18,434 
Change in fair value1,139 
Exchange difference1,516 
Balance as of December 31, 201921,089 
Change in fair value1,771 
Settlement of convertible notes(21,614)
Exchange difference(1,246)
Balance as of December 31, 2020 and 2021$—