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Convertible Notes (Tables)
12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Convertible Debt
The carrying value of the convertible notes, which approximates fair value, for the year ended December 31, 2020, consisted of the following (in thousands):
December 31, 2020
Convertible notes, current portion$21,540 
Debt discount recognized(4,884)
Debt discount amortized1,704 
Net convertible notes, current portion$18,360