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Warrant Derivative Liability (Tables)
9 Months Ended
Mar. 31, 2013
Derivative Liabilities [Abstract]  
Fair Value Measurements, Nonrecurring
Warrants were determined to have a fair value per share and aggregate value as of March 31, 2013 and in aggregate value as of June 30, 2012 as follows:

 

  Issued Warrants  Fair Value Per
Share $ as of
March 31, 2013
  Total Fair Value in
Aggregate $ as of
March 31, 2013
  Total Fair Value in
Aggregate $ as of
June 30, 2012
 
             
June 2012 Warrants  562,551  $0.71  $398,000  $1,158,000 
July 2012 Warrants  338,013  $0.70  $236,000  $ 
August 2012 Warrants  120,719  $0.70  $85,000  $ 
October 2012 Warrants  48,287  $0.71  $34,000  $ 
Advisory Agreement Warrants  1,837,777  $0.70  $1,295,000  $3,785,000 
     Total  2,907,347      $2,048,000  $4,943,000
Fair Value, Concentration of Risk

Significant assumptions used to estimate the fair value of the warrants classified as derivative liabilities at March 31, 2013 are summarized below:

 

Risk-free interest rate  0.61 – 0.69%
Expected life (average)  4.4 years 
Stock price (based on prices on valuation date) $0.86 
Exercise price $0.41 
Expected volatility  100%