Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Consolidated Statements of Operations [Abstract]
Revenues	$ 12,632	$ 34,008	$ 46,528	$ 95,227
Cost of revenues	3,699	3,771	11,035	11,468
Gross profit	8,933	30,237	35,493	83,759
Operating expenses:
Selling and marketing	6,456	7,344	21,915	22,032
Research and development	10,696	10,972	33,692	31,195
General and administrative	5,876	6,059	20,039	18,082
Restructuring expenses	984		984
Goodwill and long-lived asset impairment	112,904		112,904
Total operating expenses	136,916	24,375	189,534	71,309
Operating income (loss)	(127,983)	5,862	(154,041)	12,450
Interest and other income	13	82	98	115
Income (loss) before taxes	(127,970)	5,944	(153,943)	12,565
Income tax expense (benefit)	6,511	2,850	(3,862)	5,994
Net income (loss)	$ (134,481)	$ 3,094	$ (150,081)	$ 6,571
Net income (loss) per share:
Basic	$ (3.76)	$ 0.09	$ (4.22)	$ 0.19
Diluted	$ (3.76)	$ 0.09	$ (4.22)	$ 0.19
Weighted average shares outstanding:
Basic	35,728	34,274	35,590	34,091
Diluted	35,728	34,736	35,590	34,560