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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares
Jun. 30, 2015
May. 13, 2015
May. 12, 2015
Feb. 28, 2015
Dec. 31, 2014
Dec. 31, 2013
Series B Convertible Preferred Stock [Member]            
Preferred Stock, Par or Stated Value Per Share $ 1,000       $ 1,000 $ 1,000
Preferred Stock, Shares Issued 100       100 1,650
Preferred Stock, Shares Outstanding 100       100 1,650
Series C Convertible Preferred Stock [Member]            
Preferred Stock, Par or Stated Value Per Share $ 1,000     $ 1,000 $ 1,000  
Preferred Stock, Shares Issued 3,000     3,000 0  
Preferred Stock, Shares Outstanding 3,000       0  
Preferred Stock, Par or Stated Value Per Share $ 0.01       $ 0.01 $ 0.01
Preferred Stock, Shares Authorized 10,000,000       10,000,000 10,000,000
Common stock, par value (in dollars per share) $ 0.001       $ 0.001 $ 0.001
Common Stock, Shares Authorized 150,000,000 150,000,000 75,000,000   75,000,000 75,000,000
Common stock, shares issued (in shares) 31,950,813       31,950,813 23,765,180
Common stock, shares outstanding (in shares) 31,950,813       31,950,813 23,765,180