Note 12 - Stockholders' (Deficit) (Details Textual)	6 Months Ended	12 Months Ended
	Jun. 30, 2016 USD ($) shares	Dec. 31, 2015 shares	Dec. 31, 2014 shares
Series A Preferred Stock [Member]
Preferred Stock, Shares Authorized	5,000,000	5,000,000
Preferred Stock, Dividend Rate, Percentage	5.00%
Preferred Stock, Shares Issued	0	3,637,724
Preferred Stock, Shares Outstanding	0	3,637,724
Conversion of Stock, Shares Converted	4,125,224
Stock Issued During Period, Shares, Conversion of Convertible Securities	(3,637,724)	(487,500)
Series B Preferred Stock [Member]
Preferred Stock, Shares Authorized	230,000	230,000
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Series C Preferred Stock [Member]
Preferred Stock, Shares Authorized	747,500	747,500
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Series D Preferred Stock [Member]
Preferred Stock, Shares Authorized	250,000	250,000
Preferred Stock, Shares Issued	250,000	250,000
Preferred Stock, Shares Outstanding	250,000	250,000
Stock Issued During Period, Shares, Conversion of Convertible Securities
Common Stock, Shares Authorized	500,000,000	500,000,000
Preferred Stock, Shares Authorized	10,000,000	10,000,000
Preferred Stock, Dividend Rate, Percentage	5.00%
Common Stock, Shares Authorized, Increase in Amount	250,000,000
Common Stock, Shares, Issued	147,683,879	131,703,577
Class of Warrant or Right, Outstanding	27,860,000	22,900,000	48,463,517
Convertible Debt | $	$ 7,275,000
Debt Instrument, Convertible, Number of Equity Instruments	15,910,000
Stock Issued During Period, Shares, Conversion of Convertible Securities	16,500,896