Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
ASSETS
Cash and cash equivalents	$ 511,242	$ 312,727
Grant funds and other receivables	14,757	59,758
Prepaid expenses and other current assets	70,188	75,589
Total current assets	596,187	448,074
Property and equipment, net	16,270	31,151
Deposits	11,010	11,010
Total assets	623,467	490,235
LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIENCY)
Accounts payable	147,947	77,581
Accrued expenses (Note 6)	1,149,758	733,711
Current portion of note payable	7,294
Total current liabilities	1,304,999	811,292
Note payable, net of current portion	42,706
Total liabilities	1,347,705	811,292
Commitments (Note 8)
Stockholders’ equity (deficiency):
Common stock, $.001 par value: Authorized shares – 600,000,000 Issued and outstanding shares – 178,403,476 and 106,736,810 at September 30, 2018 and December 31, 2017	178,403	106,737
Additional paid-in capital	36,830,813	35,589,911
Accumulated deficit	(39,842,539)	(37,916,790)
Total stockholders’ equity (deficiency)	(724,238)	(321,057)
Total liabilities and stockholders’ equity (deficiency)	623,467	490,235
Series B Convertible Preferred Stock [Member]
Stockholders’ equity (deficiency):
Convertible Preferred Stock	76,095	76,095
Series C Convertible Preferred Stock [Member]
Stockholders’ equity (deficiency):
Convertible Preferred Stock	842,990	842,990
Series D Convertible Preferred Stock [Member]
Stockholders’ equity (deficiency):
Convertible Preferred Stock		980,000
Series E Convertible Preferred Stock [Member]
Stockholders’ equity (deficiency):
Convertible Preferred Stock	$ 1,190,000

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).