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Note 10 - Fair Value Measurement (Tables)
 12 Months Ended
Dec. 31, 2012
Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]
   
Fair Value
at December 31, 2012
   
Quoted prices in active markets for identical assets/ liabilities
(Level 1)
   
Significant Other Observable Inputs
(Level 2)
   
Significant Unobservable Inputs
(Level 3)
 
                         
Derivatives: (1) (2)
                       
Conversion feature liability
 
$
2,287,323
   
$
-0-
   
$
-0-
   
$
2,287,323
 
Warrant liability
   
6,287,598
     
-0-
     
-0-
     
6,287,598
 
Total of derivative liabilities
 
$
8,574,921
   
$
-0-
   
$
-0-
   
$
8,574,921
 
   
Fair Value
at December 31, 2011
   
Quoted prices in active markets for identical assets/ liabilities
(Level 1)
   
Significant Other Observable Inputs
(Level 2)
   
Significant Unobservable Inputs
(Level 3)
 
                         
Derivatives: (1) (2)
                       
Conversion feature liability
 
$
758,911
   
$
-0-
   
$
-0-
   
$
758,911
 
Warrant liability
   
1,692,708
     
-0-
     
-0-
     
1,692,708
 
Total of derivative liabilities
 
$
2,451,619
   
$
-0-
   
$
-0-
   
$
2,451,619
 
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]
Significant Valuation Assumptions of Derivative Instruments at December 31, 2012
 
Risk free interest rate
  0.18%
to
0.36%  
Dividend yield
    0.00%    
Expected Volatility
  218.2%
to
259.1%  
Expected life (range in years)
         
Conversion feature liability
  0.25
to
0.96  
Warrant liability
  0.66
to
3.25  
Significant Valuation Assumptions of Derivative Instruments at December 31, 2011
 
Risk free interest rate
  0.11%
 to
0.39%  
Dividend yield
    0.00%    
Expected Volatility
  179.7%
 to
261.0%  
Expected life (range in years)
         
Conversion feature liability
  1.25
to
1.96  
Warrant liability
  0.16
to
4.25  
Schedule of Derivative Liabilities at Fair Value [Table Text Block]
   
Other income
for the year ended
 
   
December 31,
2012
   
December 31,
2011
 
The net amount of total gains/(losses) for the period included in earnings attributable to the unrealized gain or loss from changes in derivative liabilities at the reporting date
 
$
(6,123,302
)
 
$
(671,405
)
                 
Total unrealized gains/(losses) included in earnings
 
$
(6,123,302
)
 
$
(671,405
)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
   
Level 3 Financial Assets and Financial Liabilities at Fair Value
 
   
Balance,
beginning
of year
   
Net realized
gains/(losses)
   
Net unrealized
(gains)/losses
relating to
instruments still
held at the
reporting date
   
Net
purchases,
issuances
and
settlements
   
Net transfers
in and/or out
of level 3
   
Balance,
end of
year
 
Year ended December 31, 2012
                                   
Derivatives:
                                   
Conversion feature liability
 
$
758,911
   
$
-0-
   
$
1,528,412
   
$
-0-
   
$
-0-
   
$
2,287,323
 
Warrant liability
   
1,692,708
     
-0-
     
4,594,890
     
-0-
     
-0-
     
6,287,598
 
Total of derivative liabilities
 
$
2,451,619
   
$
-0-
   
$
6,123,302
   
$
-0-
   
$
-0-
   
$
8,574,921
 
   
Level 3 Financial Assets and Financial Liabilities at Fair Value
 
   
Balance,
beginning
of year
   
Net realized
gains/(losses)
   
Net unrealized
(gains)/losses
relating to
instruments still
held at the
reporting date
   
Net
purchases,
issuances
and
settlements
   
Net transfers
in and/or out
of level 3
   
Balance,
end of
year
 
Year ended December 31, 2011
                                   
Derivatives:
                                   
Conversion feature liability
 
$
92,206
   
$
-0-
   
$
666,705
   
$
-0-
   
$
-0-
   
$
758,911
 
Warrant liability
   
261,148
     
-0-
     
4,700
     
1,426,860
     
-0-
     
1,692,708
 
Total of derivative liabilities
 
$
353,354
   
$
-0-
   
$
671,405
   
$
1,426,860
   
$
-0-
   
$
2,451,619