Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net loss	$ (10,875)	$ (24,884)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	951	989
Amortization of discount on note payable	0	820
Gain realized on sale of investment securities	(8)	0
Accretion of premium on investment securities	14	390
Loss on disposal of facilities and equipment	0	58
Restructuring	0	321
Decrease in restricted cash for operating lease	136	0
Interest accrued on capital lease obligation	66	66
Share-based compensation issued for services	(12)	369
Share-based employee compensation	2,519	6,998
Change in operating assets and liabilities:
Prepaid expenses and other assets	483	(25)
Accounts payable	1,091	730
Accrued liabilities	224	(5,062)
Net cash used in operating activities	(5,411)	(19,230)
Cash flows from investing activities:
Proceeds from maturities of investment securities	3,032	22,089
Purchases of investment securities	0	(7,322)
Facilities and equipment purchases	(9)	(7)
Proceeds from disposals of equipment and facilities	0	58
Net cash provided by investing activities	3,023	14,818
Cash flows from financing activities:
Repayment of principal on note payable	0	(6,589)
Repayment of capital lease obligation	0	(38)
Decrease in restricted cash	0	123
Net proceeds from issuance of common stock	3,184	6,092
Payment of preferred dividends	(96)	(96)
Net cash provided by (used in) financing activities	3,088	(508)
Net increase (decrease) in cash and cash equivalents	700	(4,920)
Cash and cash equivalents:
Beginning of period	1,284	15,938
End of period	1,984	11,018
Supplemental disclosure of non-cash financing activities:
Accrual of preferred dividends	144	118
Preferred stock dividends, in-kind	0	570
Supplemental disclosure of cash paid during the period for:
Interest	$ 0	$ 897