XML 39 R30.htm IDEA: XBRL DOCUMENT v2.4.1.9
Senior convertible notes (Tables)
12 Months Ended
Dec. 31, 2014
Summary of Senior Convertible Notes

Senior convertible notes consist of the following (in thousands):

 

     December 31,  
     2014     2013  

2015 notes

    

Principal amount

   $ 100,000      $ 100,000   

Unaccreted debt issuance cost

     (645     (1,561
  

 

 

   

 

 

 

Net carrying amount

   $ 99,355      $ 98,439