Consolidated Statement Of Stockholders' Equity (USD $) In Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Total
Balance, in value at Dec. 31, 2010	$ 817	$ 374,397	$ (342,414)	$ 32,800
Balance, in shares at Dec. 31, 2010	81,683
Stock options exercised, in shares	53
Stock options exercised, in value	1	34		35
Issuance of shares under public offering, in value	159	23,379		23,538
Issuance of shares under public offering, in shares	15,900
Vesting of awards granted, in shares	15
Vesting of awards granted, in value		74		74
Stock-based bonuses and match to 401(k) Plan, in shares	252
Stock-based bonuses and match to 401(k) Plan, in value	2	451		453
Net loss			(13,982)	(13,982)
Balance, in value at Sep. 30, 2011	$ 979	$ 398,335	$ (356,396)	$ 42,918
Balance, in shares at Sep. 30, 2011	97,903