Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 32,768,888	$ 27,978,823	[1]
Short-term investments	5,522,955	0	[1]
Interest and other receivables	6,869	1,980	[1]
Contingent asset	178,366	0	[1]
Prepaid expenses	560,802	428,276	[1]
Total current assets	39,037,880	28,409,079	[1]
Property and equipment, net	235,527	44,254	[1]
In-process research and development	6,549,000	0	[1]
Goodwill	403,795	0	[1]
Other assets	48,311	33,484	[1]
Total assets	46,274,513	28,486,817	[1]
Current liabilities:
Accounts payable	489,200	479,780	[1]
Accrued liabilities	1,312,882	864,857	[1]
Accrued compensation and payroll taxes	675,715	456,839	[1]
Contingent liability	644,000	0	[1]
Total current liabilities	3,121,797	1,801,476	[1]
Stockholders' equity:
Common stock, $0.001 par value; 500,000,000 shares authorized; 26,465,709 and 15,480,302 shares issued and outstanding at September 30, 2011 and December 31, 2010, respectively	26,466	15,480	[1]
Additional paid-in capital	210,166,429	182,798,982	[1]
Accumulated other comprehensive loss	(23,103)	0	[1]
Deficit accumulated during the development stage	(167,017,076)	(156,129,121)	[1]
Total stockholders' equity	43,152,716	26,685,341	[1]
Total liabilities and stockholders' equity	$ 46,274,513	$ 28,486,817	[1]

[1] The balance sheet at December 31, 2010 has been derived from audited financial statements at that date. It does not include, however, all of the information and notes required by accounting principles generally accepted in the United States of America for complete financial statements.