CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	6 Months Ended		123 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012
Operating activities:
Net loss	$ (23,431,502)	$ (27,139,593)	$ (206,757,004)
Adjustments to reconcile net loss to net cash used in operating activities:
Non-cash stock-based compensation	1,281,688	1,347,002	10,272,344
Depreciation and amortization	68,115	59,644	490,094
Stock issued for license agreement	0	0	575,023
Non-cash interest expense	0	0	34,020
Gain on disposition of assets	0	0	(2,208)
Fair value of warrants for finder's agreement	0	0	433,750
Changes in operating assets and liabilities:
Prepaid contract research and manufacturing expenses, other prepaid expenses and other assets	(353,989)	(275,829)	(1,321,102)
Accounts payable, accrued contract research and manufacturing expenses and other accrued expenses	(3,474,498)	(106,626)	8,343,962
Accrued compensation and related expenses	(1,039,518)	(397,026)	379,919
Net cash used in operating activities	(26,949,704)	(26,512,428)	(187,551,202)
Investing activities:
Acquisitions of property and equipment	(23,121)	(140,516)	(737,594)
Proceeds from sale of assets	0	0	3,677
Purchases of short-term investments	0	(61,145,219)	(115,143,906)
Redemptions and sales of short-term investments	4,500,000	5,000,000	115,143,906
Security deposits	38,267	0	0
Net cash provided by (used in) investing activities	4,515,146	(56,285,735)	(733,917)
Financing activities:
Proceeds from borrowings from affiliate	0	0	1,745,000
Proceeds from exercise of stock options	0	0	80,729
Proceeds from exercise of common stock warrants	0	8,372,465	9,054,546
Recapitalization of the Company	0	0	(400,000)
Proceeds from sales of equity securities, net of issuance costs	22,151,851	37,726,539	218,550,016
Receipt of recovery of short-swing profits	0	73,103	73,797
Receipt of cash for stock subscription receivable	0	0	4,625
Net cash provided by financing activities	22,151,851	46,172,107	229,108,713
Net (decrease) increase in cash and cash equivalents	(282,707)	(36,626,056)	40,823,594
Cash and cash equivalents, beginning of period	41,106,301	47,593,055	0
Cash and cash equivalents, end of period	40,823,594	10,966,999	40,823,594
Supplemental disclosure of cash flow information:
Cash paid for interest	$ 0	$ 0	$ 224,328