Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended		144 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013
Cash flows from operating activities:
Net loss	$ (1,223,081)	$ (1,228,276)	$ (25,990,223)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	35,101	46,822	694,381
Accretion of preferred stock redemption value			346,673
Stock-based compensation expense, including common stock issued for services	321,420	162,576	6,991,235
Changes in assets and liabilities:
Grant funds receivable	230,498	(68,276)	(35,750)
Prepaid expenses and other current assets	13,618	(11,458)	(28,683)
Deposits and other assets			(11,010)
Accounts payable and accrued expenses	(175,422)	(561,546)	240,403
Total adjustments	425,215	(431,882)	8,197,249
Net cash used in operating activities	(797,866)	(1,660,158)	(17,792,974)
Cash flows from investing activities:
Purchase of property and equipment			(538,490)
Proceeds from sale of property and equipment			5,580
Net cash used in investing activities			(532,910)
Cash flows from financing activities:
Net proceeds from sale of common stock	1,643,334	310,160	17,479,802
Net proceeds from sale of preferred stock		1,999,032	2,727,475
Net cash provided by financing activities	1,643,334	2,309,192	20,207,277
Net increase in cash and cash equivalents	845,468	649,034	1,881,393
Cash and cash equivalents at beginning of period	1,035,925	1,167,980
Cash and cash equivalents at end of period	1,881,393	1,817,014	1,881,393
Supplemental disclosure of cash flow information:
Interest paid			$ 5,669