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Note 9 - Warrants (Tables)
3 Months Ended
Mar. 31, 2013
Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block]
   
March 31, 2013
   
March 31, 2012
 
Stock Price
  $ 2.80     $ 3.60  
Exercise Price
  $ 15.36     $ 15.36  
Expected Volatility
    82 %     107 %
Expected Dividend Yield
 
None
   
None
 
Expected Term (in years)
    3.3       4.3  
Risk-free Interest Rate
    0.57 %     0.36 %
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
   
2013
   
2012
 
   
Warrants
   
Weighted
Average
Exercise
Price
   
Warrants
   
Weighted
Average
Exercise
Price
 
Outstanding at January 1,
    412,779     $ 14.11       412,779     $ 14.11  
Issued
                               
Expired
                               
Warrant redemption
                         
Exercised
                               
Outstanding at March 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       3.1     $ 13.80  
$ 13.86 to $24.00       300,000       3.2       15.36  
              412,779       3.2     $ 14.11