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Debt (Tables)
 6 Months Ended
Jun. 30, 2017
Debt Disclosure [Abstract]  
Schedule of Debt
The amortized carrying amount of our debt consists of the following (in thousands):
 
June 30,
2017
 
December 31,
2016
Secured Convertible Notes due 2018 (“Deerfield Notes”)
$
—

 
$
109,122

Term loan payable
—

 
80,000

Total debt
$
—

 
$
189,122
Summary of Interest Expense on Notes
The following is a summary of interest expense for the Deerfield Notes (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2017
 
2016
 
2017
 
2016
Stated coupon interest
$
2,083

 
$
1,972

 
$
4,151

 
$
3,908

Interest paid in kind
2,083

 
1,972

 
4,151

 
3,908

Amortization of debt discount and debt issuance costs
93

 
113

 
182

 
206

Total interest expense
$
4,259

 
$
4,057

 
$
8,484

 
$
8,022