Note 3 - Basis of Reporting and Significant Accounting Policies (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Weighted Average Number of Shares Outstanding, Basic and Diluted	118,862,734	108,482,042	112,094,593	101,231,559
Outstanding Options and Warrants to Purchase Common Stock Not Included in Diluted Computation	31,898,352	25,314,940	31,898,352	25,314,940
Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			52,075,593	38,676,232
Payment in Kind (PIK) Note [Member]
Convertible Debt, Fair Value Disclosures	$ 31,809,504		$ 31,809,504		$ 23,361,553