Note 9 - Options and Warrants to Purchase Common Stock (Details) - Summary of the Status and Changes of the Options Granted Under the Stock Option Plans and Other Agreements - 6 months ended Jun. 30, 2015 - $ / shares	Total
Summary of the Status and Changes of the Options Granted Under the Stock Option Plans and Other Agreements [Abstract]
Options Outstanding, Shares	17,053,116
Options Outstanding, Weighted Average Exercise Price	$ 1.02
Issued	888,356
Issued	$ 0.70
Exercised
Exercised
Expired	(125,000)
Expired
Options Outstanding, Shares	17,816,472
Options Outstanding, Weighted Average Exercise Price	$ 1.00