Note 12 - Stockholders' (Deficit) - Cumulative Arrearage of Undeclared Dividends (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Preferred Stock, Amount of Preferred Dividends in Arrears	$ 2,081,980	$ 2,081,980
Preferred Stock, Per Share Amounts of Preferred Dividends in Arrears
Series B Preferred Stock [Member]
Preferred Stock, Amount of Preferred Dividends in Arrears	$ 609,887	$ 609,887
Preferred Stock, Per Share Amounts of Preferred Dividends in Arrears	$ 3.05	$ 3.05
Series C Preferred Stock [Member]
Preferred Stock, Amount of Preferred Dividends in Arrears	$ 1,472,093	$ 1,472,093
Preferred Stock, Per Share Amounts of Preferred Dividends in Arrears	$ 4.37	$ 4.37