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Liability Related to the Sale of Future Royalties (Tables)
 12 Months Ended
Dec. 31, 2015
Liability Related To Sale Of Potential Future Royalties [Abstract]  
Summary of Liability Related to Potential Future Royalties

The following table shows the activity within the liability account during the year ended December 31, 2015 and for the period from the inception of the royalty transaction on February 24, 2012 (inception) to December 31, 2015 (in thousands):

 

 

 

Year ended

December 31,

2015

 

 

Period from

inception to

December 31,

2015

 

Liability related to the sale of future royalties—beginning

   balance

 

$

120,471

 

 

$

—

 

Proceeds from sale of future royalties

 

 

—

 

 

 

124,000

 

Payments from Nektar to RPI

 

 

—

 

 

 

(10,000

)

Non-cash CIMZIA® and MIRCERA® royalty revenue

 

 

(22,058

)

 

 

(76,841

)

Non-cash interest expense recognized

 

 

20,619

 

 

 

81,873

 

Liability related to the sale of future royalties – ending balance

 

$

119,032

 

 

$

119,032