Unaudited Condensed Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating activities
Net loss	$ (11,538)	$ (4,632)
Adjustments to reconcile net loss to net cash used for operating activities:
Share-based compensation expense	8,568	5,672
Gain on adjustment to fair value of derivative liabilities	0	(2,696)
Depreciation expense	3	0
Changes in operating assets and liabilities:
Restricted cash	(37)	0
Prepaids and other current assets	(22)	20
Accounts payable and accrued expenses	322	(52)
Accrued payroll and related expenses	39	11
Net cash used for operating activities	(2,628)	(1,677)
Investing Activities
Purchase of equipment and furnishings	(40)	0
Net cash used for investing activities	(77)	0
Financing Activities
Net proceeds from the issuance of common stock	6,750	0
Proceeds from the issuance of series F convertible preferred stock	3,250	0
Net cash provided by financing activities	10,000	0
Net decrease in cash and cash equivalents	7,295	(1,677)
Cash and cash equivalents at beginning of period	3,405	5,040
Cash, cash equivalents at end of period	10,700	3,363
Non-cash investing and financing activity
Dividends paid in Series C-1 and C-2 Preferred Stock	801	655
Redemption of Series D-1 preferred stock and Series C-2 preferred stock warrants	4,568	0
Issuance of Series D-1 preferred stock	0	3,611
Exchange of Series C-2 for Series C-1 preferred stock
Non-cash investing and financing activity
Conversion of stock	557	0
Conversion of Series C-1 and D-1 preferred stock into common stock
Non-cash investing and financing activity
Conversion of stock	$ 58	$ 46