v2.4.0.6
Warrants (Tables) (Warrant [Member])
9 Months Ended
Sep. 30, 2012
Warrant [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Weighted-average assumptions were utilized in the fair value calculations for warrants granted
 
   
Nine Months Ended
   
Nine Months Ended
 
   
September 30, 2012
   
September 30, 2011
 
Expected dividend yield
   
0
%
   
0
%
Expected stock price volatility
   
97-98
%
   
95-98
%
Risk-free interest rate
   
2.06-3.03
%
   
2.91-4.24
%
Expected life of warrants
 
7.6-9.9 years
   
8.8-9.9 years
 
 
Summary of the status of Company’s warrants granted
 
   
Number of Shares
Remaining
Warrants
   
Weighted
Average
Exercise Price
   
Weighted-Average
Remaining
Contractual Term
   
Aggregate
Intrinsic Value
 
Outstanding at January 1, 2012
   
1,651,250
   
$
5.61
             
Warrants granted during 2012
   
553,000
   
$
2.59
             
Warrants expired/cancelled during 2012
   
0
                     
Outstanding at September 30,2012
   
2,204,250
   
$
4.85
     
8.47
   
$
0
 
Exercisable at September 30, 2012
   
1,950,500
   
$
4.18
     
8.37
   
$
0