Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Series B Convertible Preferred Stock [Member]
Stockholders’ equity:
Convertible Preferred Stock	$ 76,095	$ 76,095
Series C Convertible Preferred Stock [Member]
Stockholders’ equity:
Convertible Preferred Stock	940,705	983,941
Cash and cash equivalents	$ 669,482	1,060,348
Grant funds receivable		119,978
Prepaid expenses and other current assets	$ 39,547	56,649
Total current assets	709,029	1,236,975
Property and equipment, net	76,413	83,608
Deposits	11,010	11,010
Total assets	796,452	1,331,593
Accounts payable	102,690	100,935
Accrued expenses	28,755	4,055
Amounts due to related parties (Note 10)	35,000	22,000
Total current liabilities	166,445	126,990
Common stock, $.001 par value: Authorized shares – 150,000,000 Issued and outstanding shares – 37,015,401 and 31,950,813 at March 31, 2016 and December 31, 2015, respectively	37,015	31,951
Additional paid-in capital	33,347,398	32,587,543
Accumulated deficit	(33,771,206)	(32,474,927)
Total stockholders' equity	630,007	1,204,603
Total liabilities and stockholders' equity	$ 796,452	$ 1,331,593