Consolidated Statements of Cash Flows (USD $)	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Operating activities:
Net loss	$ (3,651,728)	$ (3,713,553)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization and depreciation	105,443	85,779
Common stock or warrants issued in exchange for services	11,184	122,197
Stock-based compensation	388,636	122,865
Capitalized patent write-off	0	378,501
Change in operating assets and liabilities:
Grants receivable	(215,773)	(87,665)
Other receivable	247,542	(8,000)
Inventory	0	7,733
Prepaid expenses	95,859	(18,228)
Accounts payable	(300,201)	923,946
Accrued compensation	(187,279)	(319,930)
Total adjustments	145,411	1,207,198
Net cash used in operating activities	(3,506,317)	(2,506,355)
Investing activities:
Acquisition of intangible assets	(112,398)	(168,102)
Purchase of office equipment	0	(947)
Net cash used in investing activities	(112,398)	(169,049)
Financing activities:
Net proceeds from sale of common stock	0	5,679,856
Proceeds from sale of common stock pursuant to equity line	255,000	70,000
Proceeds from exercise of options and warrants	68,750	45,540
Net cash provided by financing activities	323,750	5,795,396
Net increase/(decrease) in cash and cash equivalents	(3,294,965)	3,119,992
Cash and cash equivalents at beginning of period	7,451,714	7,692,011
Cash and cash equivalents at end of period	$ 4,156,749	$ 10,812,003