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Note 8 - Convertible Debt PIK Notes (Details) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Nov. 03, 2014
Dec. 31, 2013
Aug. 05, 2013
Payment in Kind (PIK) Note [Member] | Series 2023 Notes [Member]          
Debt Instrument, Face Amount $ 12,762,816 $ 11,576,250     $ 10,500,000
Less: Discount (1,854,894) (1,949,555)      
Convertible Notes Payable 10,907,922 9,626,695      
Derivative Liability 262,764 478,149      
Payment in Kind (PIK) Note [Member] | Series A Notes [Member]          
Debt Instrument, Face Amount 21,882,955 19,848,486 $ 19,848,486    
Less: Discount (15,717,991) (16,450,742) $ (7,348,486)    
Convertible Notes Payable 6,164,964 3,397,744      
Derivative Liability 4,876,093 9,557,476      
Payment in Kind (PIK) Note [Member]          
Debt Instrument, Face Amount 34,645,771 31,424,736      
Less: Discount (17,572,885) (18,400,297)      
Convertible Notes Payable 17,072,886 13,024,439      
Derivative Liability 5,138,857 10,035,625      
Less: Discount (17,572,885) (18,400,297)      
Derivative Liability $ 5,138,857 $ 10,035,625   $ 0