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Loan Payable (Tables)
9 Months Ended
Sep. 30, 2014
Summary of Changes in Carrying Value of Loan Payable

The following table is a summary of the changes in the carrying value of our loan payable for the three months ended September 30, 2014:

 

     Silicon Valley
Bank Loan
    CIRM Loan      Total  

Carrying value of loan payable at June 30, 2014 (current and non-current)

   $ 7,299,007      $ 7,640,528       $ 14,939,535   

Loan proceeds

     —          1,955,279         1,955,279   

Repayment of principal

     (970,830     —           (970,830

Accretion of discount

     44,560        —           44,560   
  

 

 

   

 

 

    

 

 

 

Carrying value of loan payable at September 30, 2014 (current and non-current)

   $ 6,372,737      $ 9,595,807       $ 15,968,544   
  

 

 

   

 

 

    

 

 

 

Carrying value of loan payable, current portion

   $ 3,919,286      $ —         $ 3,919,286   

Carrying value of loan payable, non-current portion

     2,453,451        9,595,807         12,049,258   
  

 

 

   

 

 

    

 

 

 

Total loan payable at September 30, 2014

   $ 6,372,737      $ 9,595,807       $ 15,968,544   
  

 

 

   

 

 

    

 

 

 
Silicon Valley Bank Loan Agreement Warrant [Member]
 
Assumptions Used for Black-Scholes Option Pricing Model

We estimated the fair value of the warrant to be approximately $388,000 using the Black-Scholes option pricing model with the following assumptions:

 

Expected life (years)

     10   

Risk-free interest rate

     1.9

Expected volatility

     88.1

Expected dividend yield

     0