Consolidated Statements of Cash Flows (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Operating activities:
Net loss	$ (2,418,633)	$ (3,651,728)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization and depreciation	108,753	105,443
Common stock or warrants issued in exchange for services	3,000	11,184
Restricted Stock issued to employee	10,000
Stock-based compensation	235,002	388,636
Change in operating assets and liabilities:
Grants receivable	122,874	(215,773)
Other receivable	574,157	247,542
Prepaid expenses	(54,216)	95,859
Accounts payable	(83,987)	(300,201)
Accrued compensation	(57,575)	(187,279)
Total adjustments	858,008	145,411
Net cash used in operating activities	(1,560,625)	(3,506,317)
Investing activities:
Acquisition of intangible assets	0	(112,398)
Purchase of office equipment	(4,755)	0
Net cash used in investing activities	(4,755)	(112,398)
Financing activities:
Proceeds from sale of common stock pursuant to equity line		255,000
Proceeds from exercise of options and warrants		68,750
Net cash provided by financing activities		323,750
Net (decrease) in cash and cash equivalents	(1,565,380)	(3,294,965)
Cash and cash equivalents at beginning of period	5,996,668	7,451,714
Cash and cash equivalents at end of period	$ 4,431,288	$ 4,156,749