Condensed Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Operating activities:
Net loss	$ (4,632)	$ 1,775
Adjustments to reconcile net loss to net cash used for operating activities:
Share-based compensation expense	5,672	194
Gain on adjustments to fair value of derivative liabilities	(2,696)	(3,346)
Change in operating assets and liabilities:
Prepaids and other current assets	20	58
Accounts payable	60	(16)
Accrued expenses	(112)	(27)
Accrued payroll and related expenses	11	(2)
Net cash used for operating activities	(1,677)	(1,364)
Net decrease in cash and cash equivalents	(1,677)	(1,364)
Cash and cash equivalents at beginning of period	5,040	6,866
Cash and cash equivalents at end of period	3,363	5,502
Supplemental schedule of noncash investing and financing activities:
Issuance of preferred stock	3,611
Conversion of preferred stock into common stock	46	748
Reclassification of preferred stock currently redeemable		5,532
Preferred stock dividend forfeited (earned)	(281)	75
Payment of preferred stock dividends	(374)
Forfeiture of preferred stock dividends		$ 75