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Warrants and Derivative Liabilities (Tables)
3 Months Ended
Jun. 30, 2013
Schedule of Fair Value Assumptions Used to Calculate Value of Convertible Note Derivative Feature

Following is a summary of the key assumptions used to value the convertible notes derivative feature:

 

     June 30,  
     2013  

Fiscal Year 2013

  

Principal Outstanding (000’s)

   $ 14,389   

Stock Price

   $ 2.64   

Percentage Volume Condition Met

     87.5

Expected Volatility

     65.8

Risk Free Rate

     0.21

Bond Yield

     16.7

Recovery Rate

     37.0

Redeemable

     yes   

Total Time (years)

     1.26   

Dilution Effect

     yes   

Fair Value

   $ 0.5 million   

Fair Value as a Percent of Par

     3.3

 

                 Post-
modification
    Pre-modification                    
     March 31,     December 31,     December 20,     December 20,     September 30,     June 30,     April 4,  
     2013     2012     2012     2012     2012     2012     2012  

Fiscal Year 2012

              

Principal Outstanding (000’s)

   $ 15,380      $ 20,944      $ 20,944      $ 24,617      $ 24,191      $ 25,278      $ 25,000   

Stock Price

   $ 2.67      $ 2.62      $ 2.95      $ 2.95      $ 4.15      $ 4.68      $ 3.97   

Percentage Volume Condition Met

     80.5     94.5     94.9     28.6     51.0     75.2     85.9

Expected Volatility

     66.9     73.5     72.5     72.5     70.0     71.0     75.0

Risk Free Rate

     0.20     0.23     0.25     0.25     0.23     0.33     0.44

Bond Yield

     16.5     16.5     16.5     16.5     15.0     16.0     15.0

Recovery Rate

     30.0     30.0     30.0     30.0     30.0     30.0     30.0

Redeemable

     yes        yes        yes        yes        yes        yes        yes   

Total Time (years)

     1.51        1.76        1.79        1.79        2.01        2.28        2.5   

Dilution Effect

     yes        yes        yes        yes        yes        yes        yes   

Fair Value as a Percent of Par

     3.4     4.9     7.1     3.9     11.4     17.9     15.1

Fair Value

   $
 
0.5
million
  
  
  $
 
1.0
million
  
  
  $ 1.5 million      $ 0.9 million      $ 2.8 million      $ 4.5 million      $ 3.8 million   
Securities Purchase Agreement [Member]
 
Schedule of Fair Value of Warrants Using Black-Scholes Option Pricing Model

Following is a summary of the key assumptions used to calculate the fair value of the warrant:

 

     June 30,
2013
 

Fiscal Year 2013

  

Risk-free interest rate

     1.13

Expected annual dividend yield

     0.0

Expected volatility

     71.9

Term (years)

     4.27   

Fair Value

   $ 3.0 million   

 

     March 31,     December 31,     September 30,     June 30,     April 4,  
     2013     2012     2012     2012     2012  

Fiscal Year 2012

          

Risk-free interest rate

     0.67     0.75     0.63     0.77     1.19

Expected annual dividend yield

     0.0     0.0     0.0     0.0     0.0

Expected volatility

     71.7     80.6     80.9     80.8     80.0

Term (years)

     4.51        4.76        5.01        5.28        5.5   

Fair Value

   $ 3.4 million      $ 4.4 million      $ 7.1 million      $ 8.6 million      $ 7.0 million  
Loan and Security Agreement [Member]
 
Schedule of Fair Value of Warrants Using Black-Scholes Option Pricing Model

Following is a summary of the key assumptions used to calculate the fair value of the warrant:

 

     June 30,  
     2013  

Fiscal Year 2013

  

Risk-free interest rate

     1.20

Expected annual dividend yield

     —  

Expected volatility

     72.3

Term (years)

     4.43   

Fair Value

   $ 0.2 million   

 

     March 31,     December 31,     September 30,     June 30,     June 5,  
     2013     2012     2012     2012     2012  

Fiscal Year 2012

          

Risk-free interest rate

     0.70     0.75     0.64     0.80     0.77

Expected annual dividend yield

     —       —       —       —       —  

Expected volatility

     72.01     80.14     81.18     80.32     79.99

Term (years)

     4.68        4.93        5.18        5.44        5.5   

Fair Value

   $ 0.2 million      $ 0.2 million      $ 0.4 million      $ 0.5 million      $ 0.4 million