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Borrowings (Tables)
 12 Months Ended
Dec. 31, 2020
Debt Disclosure [Abstract]  
Schedule of Outstanding Borrowings The following table summarizes the outstanding borrowings from the term loan as of the periods presented:
December 31, 2020December 31, 2019
(in thousands)
Principal outstanding and final fee$41,000 $40,000 
Less: Unamortized debt issuance costs
(661)(777)
      Unaccreted value of final fee(884)— 
Outstanding debt, net of debt issuance costs and unaccreted value of final fee
$39,455 $39,223 
Classified as:
Current portion of long-term borrowings
$— $4,358 
Long-term borrowings
$39,455 $34,865 
Schedule of Annual Future Minimum Principal Payments Under Loan Agreements
Year ending December 31,
(in thousands)
2021$— 
2022— 
202311,667 
202420,000 
20259,333 
Total principal and final fee payments
$41,000