Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended			186 Months Ended
	Sep. 30, 2011		Sep. 30, 2010	Sep. 30, 2011
Cash flows from operating activities:
Net loss	$ (10,887,955)		$ (6,166,415)	$ (169,245,683)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	28,735		16,526	10,476,355
(Gain) loss on disposals of fixed assets	(2,973)		2,019	56,812
Loss on fair value of warrants				12,239,688
Gain on change in fair value of contingent consideration	(318,785)			(318,785)
Expenses related to share-based compensation	533,704		604,772	9,757,646
Expense related to stock options issued to non-employees				204,664
Expenses paid by issuance of common stock				1,341,372
Expenses paid by issuance of warrants				573,357
Expenses paid by issuance of preferred stock				142,501
Expenses related to stock warrants issued				612,000
Accretion of discount on investments in securities				(1,604,494)
Amortization of debt discount				450,000
Forgiveness of employee receivable				30,036
Impairment loss - write-off of goodwill				5,702,130
Equity in loss of investee				178,936
In-process research and development				10,422,130
Write-off of license agreement				152,866
Write-off of assets available-for-sale				108,000
Cumulative effect of change in accounting principle				25,821
Changes in assets and liabilities, net of effect of acquisitions:
Increase in prepaid expenses and other assets	(154,146)		(186,929)	(865,256)
Increase (decrease) in accounts payable and accrued liabilities	374,755		(1,277,316)	2,352,939
Net cash used in operating activities	(10,426,665)		(7,007,343)	(117,206,965)
Cash flows from investing activities:
Purchases of short-term investments				(111,183,884)
Proceeds from sales and maturities of short-term investments				112,788,378
Purchases of property and equipment	(208,982)		(6,780)	(1,267,849)
Proceeds from sale of property and equipment	12,635		1,700	66,920
Purchase of certificate of deposits	(5,523,201)			(6,539,531)
Maturity of certificate of deposits				1,016,330
Payment on obligation under license agreement				(106,250)
Cash acquired from acquisitions, net of cash paid				32,395
Issuance of note receivable - related party				(35,000)
Payments on note receivable				405,993
Advance to investee				(90,475)
Cash transferred in rescission of acquisition				(19,475)
Cash received in rescission of acquisition				230,000
Net cash provided by (used in) investing activities	(5,719,548)		(5,080)	(4,702,448)
Cash flows from financing activities:
Proceeds from sale of preferred stock			30,453,227	44,474,720
Proceeds of restricted cash for preferred stock dividends			633,008	633,008
Proceeds from sale of common stock	22,507,529			106,658,871
Proceeds from exercise of stock options				712,367
Proceeds from sale or exercise of warrants			317,444	14,714,258
Payment to escrow for preferred stock dividends obligation			(633,008)	(633,008)
Repurchase of warrants				(55,279)
Payments for financing and offering costs	(1,548,123)		(3,093,733)	(12,542,171)
Payments on notes payable and long-term debt				(605,909)
Proceeds from issuance of notes payable and detachable warrants				1,344,718
Cash paid in lieu of fractional shares for reverse stock split			(146)	(146)
Net cash provided by financing activities	20,959,406		27,676,792	154,701,429
Effect of exchange rate changes on cash	(23,128)			(23,128)
Net increase in cash and cash equivalents	4,790,065		20,664,369	32,768,888
Cash and cash equivalents at beginning of period	27,978,823	[1]	8,667,404
Cash and cash equivalents at end of period	$ 32,768,888		$ 29,331,773	$ 32,768,888

[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.