Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Operating activities:
Net income (loss)	$ 5,284		$ (6,509)
Adjustments to reconcile net income (loss) to net cash used for operating activities:
Share-based compensation expense			68
(Gain) loss on adjustments to fair value of derivative liabilities	(5,954)		6,029
Change in operating assets and liabilities:
Prepaids and other current assets	10		65
Accounts payable	28		(12)
Accrued expenses	(27)		226
Accrued payroll and related expenses			(12)
Net cash used for operating activities	(659)		(121)
Investing activities:
Purchase of patent assets			(243)
Net cash used for investing activities			(243)
Net decrease in cash and cash equivalents	(659)		(364)
Cash and cash equivalents at beginning of period	5,040	[1]	6,866
Cash and cash equivalents at end of period	4,381		6,502
Supplemental schedule of noncash investing and financing activities:
Reclassification of preferred stock currently redeemable			5,532
Preferred stock dividends earned	186
Suspension of preferred stock dividends			$ (78)

[1] The condensed consolidated balance sheet at December 31, 2011 has been derived from the audited consolidated financial statements as of that date but does not include all of the information and disclosures required by U.S. generally accepted accounting principles (see Note 1)