Statements Of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating activities:
Net loss	$ (5,146,347)	$ (4,103,996)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	6,920	7,484
Non-cash share-based compensation	144,997	361,195
Gain on settlement of accrued liabilities		(141,016)
Changes in operating assets and liabilities:
Grants receivable	(4,195)	(15,603)
Prepaid expenses and other current assets	302,090	(385,679)
Other assets	5,752	5,693
Accounts payable	(126,097)	464,932
Accrued expenses	(23,945)	(54,450)
Net cash used in operating activities	(4,840,825)	(3,861,440)
Investing activities:
Purchase of property and equipment	(1,084)	(23,632)
Net cash used in investing activities	(1,084)	(23,632)
Financing activities:
Net proceeds from issuance of common stock	1,576,016	4,505,251
Net cash provided by financing activities	1,576,016	4,505,251
Net (decrease) increase in cash and cash equivalents	(3,265,893)	620,179
Cash and cash equivalents at beginning of period	3,790,352	4,355,768
Cash and cash equivalents at end of period	$ 524,459	$ 4,975,947