Note 5 - Property and Equipment - Schedule of Property and Equipment (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Laboratory Equipment [Member]
Property and equipment, gross	$ 525,956	$ 525,956
Leasehold Improvements [Member]
Property and equipment, gross	115,605	115,605
Other Furniture Fixtures And Equipment [Member]
Property and equipment, gross	28,685	28,685
Property and equipment, gross	670,246	670,246
Accumulated depreciation and amortization	(608,223)	(586,638)
Property and equipment, net	$ 62,023	$ 83,608