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Convertible Senior Secured Notes (Tables)
12 Months Ended
Dec. 31, 2015
Convertible Senior Secured Notes  
Summary of issuance of Notes reflected in balance sheet

 

The table below summarizes activity related to the Notes from issuance on May 3, 2013 through December 31, 2015, in thousands:

                                                                                                                                                                                    

Gross proceeds

 

$

90,000

 

Initial value of interest make-whole derivative reported as debt discount

 

 

(9,270

)

Conversion option reported as debt discount and APIC

 

 

(22,336

)

Conversion of debt to equity—principal

 

 

(53,941

)

Conversion of debt to equity—accretion of debt discount

 

 

17,926

 

Accretion of debt discount

 

 

4,568

 

​  

​  

December 31, 2014 carrying value

 

 

26,947

 

Conversion of debt to equity—principal

 

 

(27,522


)

Conversion of debt to equity—accretion of debt discount

 

 

7,077

 

Accretion of debt discount

 

 

687

 

​  

​  

December 31, 2015 carrying value

 

$

7,189

 

​  

​  

​  

​