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Notes Payable (Tables)
3 Months Ended
Mar. 31, 2018
Debt Disclosure [Abstract]  
Schedule of Aggregate Carrying Amounts of Loans

The aggregate carrying amounts of the Loans are comprised of the following (in thousands):

 

 

 

March 31,

2018

 

 

December 31,

2017

 

Principal

 

$

8,400

 

 

$

10,200

 

Add: accreted liability for final payment fee

 

 

971

 

 

 

869

 

Less: unamortized discount

 

 

(199

)

 

 

(244

)

 

 

$

9,172

 

 

$

10,825

 

 

Schedule of Future Maturities Loans Including Final Payment Fee

Future maturities of the Loans, including the final payment fee, as of March 31, 2018 are as follows (in thousands):

 

 

 

March 31,

2018

 

Year ending December 31, 2018

 

$

5,400

 

Year ending December 31, 2019

 

 

4,431

 

 

 

 

9,831

 

Unaccreted balance for final payment fee on Loans

 

 

(460

)

Unamortized discounts

 

 

(199

)

 

 

 

9,172

 

Less current portion

 

 

(7,200

)

Noncurrent portion

 

$

1,972