Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash Flows From Operating Activities:
Net loss	$ (8,093)	$ (5,002)
Adjustments to reconcile net loss to net cash used in operating activites:
Stock-based compensation	1,202	1,303
Depreciation	33	51
Provision for uncollectible accounts receivable	0	269
Provision for uncollectible note and interest receivables	763	0
Loss on sale of equipment	58	0
Impairment on loss of equipment	0	30
Gain on sale of discontinued operations	0	(677)
Changes in operating assets and liabilities:
Accounts receivable	0	14
Prepaid expenses and other current assets	800	(135)
Deposits and other assets	33	4
Accounts payable	189	2
Accrued liabilities	0	(2)
Net Cash Used In Operating Activities	(5,015)	(4,143)
Cash Flows From Investing Activities:
Purchase of property and equipment	(25)	(7)
Net Cash Used In Investing Activities	(25)	(7)
Cash Flows From Financing Activities:
Proceeds from issuance of common stock for stock option exercises	231	94
Proceeds from issuance of common stock for warrant exercises	0	1,955
Net Cash Provided By Financing Activities	231	2,049
Net decrease in cash	(4,809)	(2,101)
Cash at beginning of period	9,954	6,678
Cash at end of period	5,145	4,577
Supplemental disclosures of cash flow information:
Cash paid for interest	0	0
Cash paid for taxes	$ 0	$ 0