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Debt (Tables)
 12 Months Ended
Dec. 31, 2015
Debt Disclosure [Abstract]  
Schedule of Maturities of Long-term Debt
Maturities of long-term debt as of December 31, 2015, are as follows (in thousands):
2016
$
6,666

2017
6,667

2018
6,667

2019
—

2020
—

Thereafter
7,000

Principal balance outstanding
27,000

Less: unamortized discounts
(4,615
)
Net carrying value of long-term debt
22,385

Less: current portion
(6,414
)
Long-term portion
$
15,971