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 from continuing operations	$ (34,983)	$ (56,316)
Adjustments to reconcile net loss to net cash used for operating activities from continuing operations:
Depreciation	85	101
Share-based compensation expense	5,825	4,827
Changes in assets and liabilities:
Inventories	118	(1,803)
Prepaid expenses and other assets	603	1,663
Accounts payable	(560)	(3,405)
Accrued research and clinical expenses	(1,535)	1,857
Accrued employee compensation and benefits	405	115
Accrued and other liabilities	(173)	1,542
Net cash used for operating activities from continuing operations	(30,215)	(51,419)
Net cash (used for) provided by operating activities from discontinued operations	(856)	630
Net cash used for operating activities	(31,071)	(50,789)
CASH FLOWS FROM INVESTING ACTIVITIES:
Property and equipment purchases	(185)	(51)
Purchases of available-for-sale securities	(77,025)	(163,645)
Proceeds from maturity of available-for-sale securities	95,234	200,750
Net cash provided by investing activities from continuing operations	18,024	37,054
Net cash used for investing activities from discontinued operations		(52)
Net cash provided by investing activities	18,024	37,002
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from exercise of common stock options	1,894	2,192
Sale of common stock through employee stock purchase plan	132	215
Net proceeds from issuance of common stock	45,284
Net cash provided by financing activities from continuing operations	47,310	2,407
Net cash used for financing activities from discontinued operations		(117)
Net cash provided by financing activities	47,310	2,290
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	34,263	(11,497)
CASH AND CASH EQUIVALENTS:
Beginning of period	37,216	40,533
End of period	$ 71,479	$ 29,036