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Long-term Debt (Tables)
 12 Months Ended
Dec. 31, 2019
Debt Disclosure [Abstract]  
Schedule of Principal and Interest Payments of Debt
As of December 31, 2019, the scheduled principal and interest payments (based on the interest rate of 7.25 percent as of December 31, 2019) as well as the back-end fee described above are as follows:

 
Principal
 
Interest
 
Back-end fee
 
Total
2020
$
5,333

 
$
573

 
$
—

 
$
5,906

2021
4,889

 
180

 
1,440

 
6,509

Thereafter
—

 
—

 
—

 
—

Total scheduled payments
$
10,222

 
$
753

 
$
1,440

 
$
12,415

Less: debt discount and issuance costs
$
(955
)
 
 
 
 
 
 
Less: current portion of long-term debt
$
(4,812
)
 
 
 
 
 
 
Long-term debt
$
4,455