Statements of Cash Flows (USD $)	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Operating activities:
Net loss	$ (3,128,575)	$ (2,516,149)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	4,763	5,398
Non-cash share-based compensation	103,580	244,590
Gain on settlement of accrued liabilities	0	(141,016)
Changes in operating assets and liabilities:
Grants receivable	(570,261)	(11,129)
Prepaid expenses and other current assets	251,866	25,991
Other assets	5,752	5,693
Accounts payable	41,951	131,603
Accrued expenses	370,646	7,682
Net cash used in operating activities	(2,920,278)	(2,247,337)
Investing activities:
Purchase of property and equipment	(1,084)	(22,406)
Net cash used in investing activities	(1,084)	(22,406)
Financing activities:
Net proceeds from issuance of common stock	1,417,216	4,505,251
Net cash provided by financing activities	1,417,216	4,505,251
Net increase (decrease) in cash and cash equivalents	(1,504,146)	2,235,508
Cash and cash equivalents:
Beginning of period		6,591,276
End of period		$ 4,355,768