Condensed Statements of Comprehensive (Loss) Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Expenses:
Research and development	$ 655	$ 34
General and administrative	3,548	637
Total expenses	4,203	671
Loss from operations	(4,203)	(671)
Other income (expense):
Adjustments to fair value of derivative liabilities		5,954
Other income (expense), net	1	1
Net (loss) income	(4,202)	5,284
Preferred stock dividends earned, net of forfeits	(93)	(186)
Comprehensive net (loss) income attributable to common stockholders	$ (4,295)	$ 5,098
Net (loss) income per share basic	$ (0.25)	$ 2.44
Net (loss) income per share diluted	$ (0.25)	$ 0.00
Shares used in computing basic net (loss) income per share	17,521	2,092
Shares used in computing diluted net (loss) income per share	17,521	5,472,245