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Long-Term Debt (Tables)
3 Months Ended
Mar. 31, 2019
Debt Disclosure [Abstract]  
Summary of Long Term Debt

Long-term debt consisted of the following:

 

        March 31,   
2019
     December 31,
2018
 

Principal amount of long-term debt

   $ 19,546      $ 10,000  

Less: Current portion of long-term debt

     (5,298      (1,687
  

 

 

    

 

 

 

Long-term debt, net of current portion

     14,248        8,313  

Debt discount, net of accretion

     (1,019      (226

Cumulative accretion of final payment due at maturity

     136        58  
  

 

 

    

 

 

 

Long-term debt, including accretion, net of current portion

   $ 13,365      $ 8,145  
  

 

 

    

 

 

 

Schedule of Future Principal Payments and the Final Payments Due

As of March 31, 2019, future principal payments and the final payment due under the Company’s loan agreements were as follows:

 

Year Ending December 31,    Hercules      FFG      Total  

2019

   $ 1,345      $ 2,914      $ 4,259  

2020

     4,305        4,462        8,767  

2021

     4,350        2,170        6,520  
  

 

 

    

 

 

    

 

 

 

Long-term debt

   $     10,000      $       9,546      $ 19,546