CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended		88 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013
Cash Flows From Operating Activities:
Net loss	$ (18,697)	$ (7,023)	$ (127,750)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation			10
Loss on disposal of property and equipment			2
Stock-based compensation expense	1,257	438	6,741
Accretion of discount/premium on investment securities	37		(49)
Purchased in-process research and development			28,157
Change in fair value of derivative instruments-warrants	1,093	(8)	(2,528)
Changes in operating assets and liabilities:
Accounts payable and accrued expenses	700	303	7,167
Security deposit			(20)
Prepaid expenses and other current assets	(27)	(554)	(1,574)
Total Adjustments	3,060	179	37,906
Net Cash Used in Operating Activities	(15,637)	(6,844)	(89,844)
Cash Flows From Investing Activities:
Loans to related parties	(270)	(278)	(3,731)
Sale/(purchases) of available-for-sale securities	8,000		(12,000)
Additions to property and equipment	(78)		(120)
Net Cash Provided by/(Used in) Investing Activities	7,652	(278)	(15,851)
Cash Flows From Financing Activities:
Proceeds from sale of common stock	4,671		121,105
Fees and expenses related to sale of common stock	(140)		(6,863)
Proceeds from exercise of stock warrants			415
Proceeds from exercise of stock options	105		105
Net Cash Provided by Financing Activities	4,636		114,762
Net (decrease) increase in cash and cash equivalents	(3,349)	(7,122)	9,067
Cash and cash equivalents at beginning of period	12,416	13,245
Cash and cash equivalents at end of period	9,067	6,123	9,067
Supplementary disclosure of cash flow information:
Cash paid for taxes	18	1	158
Supplementary disclosure of non-cash investing and financing activities:
Value of warrants classified as derivative liability-net			8,879
Value of common stock issued to induce stockholders to extend lock-up agreements			3,235
Recapitalization of Synergy	$ 4,904		$ 4,904