Note 3 - Financial Condition and Going Concern (Details Textual) - USD ($)				6 Months Ended	25 Months Ended	52 Months Ended
	Jul. 11, 2017	Feb. 14, 2017	Oct. 02, 2015	Jun. 30, 2017	Jun. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Retained Earnings (Accumulated Deficit)				$ (251,429,717)	$ (251,429,717)	$ (251,429,717)	$ (241,379,712)
Cash and Cash Equivalents, at Carrying Value				3,629,038	3,629,038	3,629,038	$ 2,624,162	$ 12,307,789	$ 9,265,144
Proceeds from Warrant Exercises				$ 5,100,000	$ 800,000	$ 2,100,000
Aggregate Offering Price, Additions			$ 7,500,000
Private Placement [Member] | Subsequent Event [Member]
Proceeds from Issuance of Common Stock	$ 5,000,000
February 14, 2017 Public Offering [Member]
Proceeds from Issuance of Common Stock		$ 5,000,000