CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating activities:
Net income (loss)	$ 393	$ (5,494)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Non-cash loss on debt extinguishment	2,037
Non-cash interest expense	186
Compensation related to stock options, restricted stock and employee stock purchase plan	93	345
Depreciation and amortization		555
Loss (gain) on disposition of property and equipment	(30)	17
Non-cash restructuring charges		1,481
Non-cash amortization of discount on notes payable		2,324
Non-cash gain on settlement of liabilities		(92)
Changes in fair market value of liabilities
Price adjustable warrants	(1,832)	(3,278)
Debt features	(829)
Stock reserved for issuance to settle liabilities	(313)
Changes in assets and liabilities
Accounts receivable	2
Prepaid expenses and other assets	128	456
Accounts payable	(102)	440
Deferred revenue	(115)	(166)
Accrued and other liabilities	587	(314)
Accrued restructuring	(380)
Net cash used in operating activities	(175)	(3,726)
Investing activities:
Change in restricted cash	380	319
Proceeds from the sale of property and equipment	30	371
Net cash provided by investing activities	410	690
Financing activities:
Proceeds from issuance of notes payable and warrants		1,500
Insurance financing	(10)
Proceeds from sales of common shares and warrants, net		1,111
Payments on notes payable		(140)
Proceeds from exercise of warrants and employee stock purchase plan purchases		2
Net cash provided by (used in) financing activities	(10)	2,473
Net increase (decrease) in cash	225	(563)
Cash and cash equivalents - beginning of period	216	976
Cash and cash equivalents - end of period	441	413
Non-cash financing activities:
Issuance of common stock to settle liabilities		1,357
Supplemental disclosure:
Cash paid for interest		$ 62