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Debt (Tables)
 12 Months Ended
Dec. 31, 2022
Debt Disclosure [Abstract]  
Long term debt and the unamortized discount
The fair value of the debt is classified as Level 2. Given the maturity and variable interest rate on the debt, the book value approximates its fair value. Long term debt and the unamortized discount balances are as follows:
 
 
  
December 31,
 
  
December 31,
 
 
  
2022
 
  
2021
 
Outstanding principal amount
    $ 30,709      $ 27,000  
Add: accreted liability of final payment fee
      407        125  
Less: unamortized debt discount, long term
      (990 )       (1,618 ) 
Less: current portion of long term debt-principal
      (9,491 )       (1,291 ) 
    
 
 
     
 
 
  
Debt—net of current portion

    $ 20,635      $ 24,216  
 
 
 
 
 
 
 
 
 
    
 
 
     
 
 
  
Current portion of long term debt—principal

    $ 9,491      $ 1,291  
Less: current portion of unamortized debt discount
      (1,188 )       (716 ) 
    
 
 
     
 
 
  
Debt—current portion
    $ 8,303      $ 575  
    
 
 
     
 
 
  
Scheduled principal payments on total outstanding debt
Scheduled principal payments on total outstanding debt as of December 31, 2022 are as follows:
 
Year ending December 31,
  
 
 
2023
   
$
 9,491  
2024
      13,007  
2025
      8,020  
2026
      191  
    
 
 
  
     $ 30,709  
    
 
 
  
Scheduled principal payments on total outstanding debt as of December 31, 2021 are as follows:
 
Year ending December 31,
  
 
 
2022
  
$
702
 
2023
  
 
8,682
 
2024
  
 
11,008
 
2025
  
 
6,608
 
2026
  
 
—  
 
  
 
 
 
  
$
27,000