CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY AND COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit	Accumulated Items of Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2008	$ 248,195	$ 50	$ 1,216,267	$ (370)	$ (966,823)	$ (929)
Beginning Balance (in shares) at Dec. 31, 2008		50,224
Net loss	(69,725)				(69,725)
Change in unrealized gains and losses on investments, net of taxes	25					25
Foreign currency translation adjustment	474					474
Total comprehensive loss	(69,226)
Stock-based compensation plans activity and stock-based compensation (in shares)		539
Stock-based compensation plans activity and stock-based compensation	5,433	1	5,189	243
Ending Balance at Dec. 31, 2009	184,402	51	1,221,456	(127)	(1,036,548)	(430)
Ending Balance (in shares) at Dec. 31, 2009		50,763
Net loss	(3,622)				(3,622)
Foreign currency translation adjustment	(5)					(5)
Total comprehensive loss	(3,627)
Stock-based compensation plans activity and stock-based compensation (in shares)		1,254
Stock-based compensation plans activity and stock-based compensation	7,836	1	8,228	(393)
Ending Balance at Dec. 31, 2010	188,611	52	1,229,684	(520)	(1,040,170)	(435)
Ending Balance (in shares) at Dec. 31, 2010		52,017
Net loss	(1,702)				(1,702)
Foreign currency translation adjustment	136					136
Total comprehensive loss	(1,566)
Stock-based compensation plans activity and stock-based compensation (in shares)		511
Stock-based compensation plans activity and stock-based compensation	5,125	1	5,870	(746)
Ending Balance at Dec. 31, 2011	$ 192,170	$ 53	$ 1,235,554	$ (1,266)	$ (1,041,872)	$ (299)
Ending Balance (in shares) at Dec. 31, 2011		52,528