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Debt (Tables)
12 Months Ended
Dec. 31, 2020
Debt Disclosure [Abstract]  
Schedule of Outstanding Balances
The table below summarizes the outstanding balances recorded for the Notes (in thousands):
 December 31,
 20202019
2017 Notes Principal Outstanding$— $5,304 
Unamortized discount (2017 Notes)— (56)
2018 Notes— 2,707 
Unamortized discount (2018 Notes)— (81)
Net carrying amount— 7,874 
Less: current portion— 6,459 
Non-current portion$— $1,415 
The following table summarizes the outstanding balances recorded for other debt (in thousands):
December 31,
20202019
Vehicle loan$52 $45 
Additional Equipment Loan349 146 
Total401 191 
Less: current portion99 51 
Non-current portion$302 $140 
Schedule of Principal Maturity for Long-Term Debt Outstanding
Following is the principal maturity schedule for long-term debt outstanding as of December 31, 2020 (in thousands):
 Amount
2021$99 
2022101 
202391 
202458 
202552 
Total401 
Less unamortized debt cost— 
Long-term debt$401