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Note 7 - Preferred Stock (Details Textual) - USD ($)
1 Months Ended 12 Months Ended
Feb. 28, 2015
Feb. 28, 2015
Dec. 31, 2016
Dec. 31, 2014
Dec. 31, 2015
Common Stock, Par or Stated Value Per Share     $ 0.001   $ 0.001
Preferred Stock, Par or Stated Value Per Share     0.01   0.01
Warrants Issued in Connection with Series C Preferred Stock [Member]          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 51,333,331 51,333,331      
Adjustments to Additional Paid in Capital, Warrant Issued $ 1,695,869        
Series A Convertible Preferred Stock [Member]          
Common Stock, Par or Stated Value Per Share       $ 1,000  
Series B Convertible Preferred Stock [Member]          
Preferred Stock, Par or Stated Value Per Share     $ 1,000   $ 1,000
Preferred Stock, Shares Outstanding     100   100
Convertible Preferred Stock, Total Conversion Shares     285,714    
Series C Convertible Preferred Stock [Member]          
Preferred Stock, Par or Stated Value Per Share $ 1,000 $ 1,000 $ 1,000   $ 1,000
Preferred Stock, Shares Outstanding     2,868   3,000
Convertible Preferred Stock, Total Conversion Shares     57,363,520    
Stock Issued During Period, Shares, New Issues 3,000        
Proceeds from Issuance of Preferred Stock, Preference Stock, and Warrants $ 2,679,810        
Stock Issued During Period, Value, New Issues $ 983,941        
Preferred Stock, Voting Rights   0      
Conversion from Series A Convertible Preferred Stock to Common Stock [Member]          
Convertible preferred stock (in shares)       71  
Conversion of stock, shares issued (in shares)       202,857  
Conversion from Series B Convertible Preferred Stock to Common Stock [Member]          
Convertible preferred stock (in shares)       1,550  
Conversion of stock, shares issued (in shares)       4,428,571  
Conversion from Series C Convertible Preferred Stock to Common Stock [Member]          
Convertible preferred stock (in shares)     132    
Conversion of stock, shares issued (in shares)     1,400,000