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Facility financing agreement (Tables)
 6 Months Ended
Jun. 30, 2014
Components of Facility Financing Agreement

The significant activity related to the facility financing agreement during the six months ended June 30, 2014 consist of the following (in thousands):

 

     June 30,
2014		  

Facility financing obligation

   

Carrying value at December 31, 2013

    $ 102,300   

Principal converted to equity

      (93,500 ) 

Accretion of debt discount and debt issuance expense

      7,191   

Adjustment to debt discount related to modification of the 2019 notes

      2,921   

Tranche B principal amount

      20,000   

Debt discount related to Tranche B purchase

      (1,168 ) 
  

 

 

  

Net carrying value of facility financing obligation

    $ 37,744   
  

 

 

  

Commitment Asset

   

Commitment asset fair value balance at December 31,2013

    $ 5,157   

Tranche B commitment asset fair value

      2,921   

Less commitment asset portion associated with the receipt of Tranche B notes

      (1,168 ) 
  

 

 

  

Commitment asset value included in other assets

    $ 6,910   
  

 

 

  
Accretion of Debt Issuance Cost and Debt Discount

Accretion of debt issuance cost and debt discount in connection with the facility financing agreement during the three and six months ended June 30, 2014 are as follows (in thousands):

 

     Three months ended
June 30, 2014		      Six months ended
June 30, 2014		  

Accretion expense- debt issuance cost

    $ 27       $ 309   

Accretion expense- debt discount

    $ 516       $ 6,883