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Warrants (Tables)
 12 Months Ended
Dec. 31, 2012
Other Liabilities Disclosure [Abstract]  
Outstanding warrants to purchase common stock
Reason   Number
of Shares		   Price Per
Share		  Issue Date  Expiration
Date
Common stock financing   57,776   $1.80   May 2009   May 2014
Senior convertible note financing (Note 6)   550,000   $2.44   Nov 2010   May 2016
    607,776             

 

   

The Company had the following outstanding warrants to purchase common stock at December 31, 2011:

 

 

Reason   Number
of Shares		   Price Per
Share		  Issue Date  Expiration
Date
Common stock financing   74,442   $1.80   May 2009   May 2014
Senior convertible note financing (Note 6)   550,000   $2.44   Nov 2010   May 2016
    624,442