Condensed Consolidated Statements Of Operations (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues:
Royalty and license fees	$ 32,225	$ 58,185	$ 58,940	$ 101,449
Past production payments	14,000	0	15,500	0
Product and service revenues	389	130	838	404
Total revenues	46,614	58,315	75,278	101,853
Operating expenses:
Cost of revenues	1,014	2,117	2,828	4,034
Research, development and other related costs	20,170	21,521	43,575	42,231
Selling, general and administrative	24,642	23,299	48,655	46,769
Litigation expense	17,406	6,724	31,487	10,216
Restructuring, impairment of long-lived assets and other charges	5,947	0	17,600	0
Total operating expenses	69,179	53,661	144,145	103,250
Operating income (loss)	(22,565)	4,654	(68,867)	(1,397)
Other income and expense, net	486	987	822	1,655
Income (loss) before taxes from continuing operations	(22,079)	5,641	(68,045)	258
Provision for (benefit from) income taxes	1,899	3,977	(18,540)	2,813
Income (loss) from continuing operations	(23,978)	1,664	(49,505)	(2,555)
Income (loss) from discontinued operations, net of tax	8,164	(2,073)	(10,932)	(5,942)
Net loss	$ (15,814)	$ (409)	$ (60,437)	$ (8,497)
Income (loss) per share:
Income (loss) from continuing operations - Basic (in dollars per share)	$ (0.45)	$ 0.03	$ (0.94)	$ (0.05)
Income (loss) from continuing operations - Diluted (in dollars per share)	$ (0.45)	$ 0.03	$ (0.94)	$ (0.05)
Income (loss) from discontinued operations - Basic (in dollars per share)	$ 0.15	$ (0.04)	$ (0.21)	$ (0.11)
Income (loss) from discontinued operations - Diluted (in dollars per share)	$ 0.15	$ (0.04)	$ (0.21)	$ (0.11)
Net loss:
Net loss - Basic (in dollars per share)	$ (0.30)	$ (0.01)	$ (1.14)	$ (0.16)
Net loss - Diluted (in dollars per share)	$ (0.30)	$ (0.01)	$ (1.14)	$ (0.16)
Cash dividends declared per share (in dollars per share)	$ 0.40	$ 0.10	$ 0.50	$ 0.10
Weighted average number of shares used in per share calculations-basic (in shares)	53,157	51,881	52,789	51,765
Weighted average number of shares used in per share calculations-diluted (in shares)	53,984	52,072	52,789	51,765