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Note 12 - Warrants (Tables)
12 Months Ended
Dec. 31, 2012
Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block]
   
2012
   
2011
 
Stock Price
  $ 2.15     $ 2.15  
Exercise Price
  $ 15.36     $ 8.56  
Expected Volatility
    135 %     105 %
Expected Dividend Yield
 
None
   
None
 
Expected Term (in years)
    3.8       4.8  
Risk-free Interest Rate
    0.36 %     0.77 %
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
   
2012
   
2011
 
   
Warrants
   
Weighted
Average
Exercise
Price
   
Warrants
   
Weighted
Average
Exercise
Price
 
Outstanding at January 1,
    412,779     $ 14.11       292,856     $ 27.60  
Issued
                    300,000       14.94  
Expired
                    (17,979 )     83.94  
Warrant redemption                     (162,098 )     19.68  
Exercised
                               
Outstanding at December 31,
    412,779     $ 14.11       412,779     $ 14.11  
Currently exercisable
    412,779     $ 14.11       412,779     $ 14.11  
Schedule of Stockholders Equity [Table Text Block]
Warrants Outstanding and Exercisable  
Range of
Exercise Prices
 
Warrants
   
Weighted
Average
Remaining
Contractual
Life (Years)
   
Weighted
Average
Exercise
Price
 
  $13.80
 
    112,779       3.4     $ 13.80  
$13.86 to
$24.00
    300,000       3.8       15.36  
          412,779       3.6     $ 14.11