Quarterly Information (Unaudited) (Details) (USD $)	3 Months Ended																12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]
Net revenue	$ 50,595,000		$ 48,958,000		$ 49,850,000	[1]	$ 56,793,000		$ 67,264,000	[2]	$ 59,088,000		$ 65,526,000	[1]	$ 66,964,000		$ 206,196,000	[3]	$ 258,842,000	[3]	$ 335,686,000	[3]
Gross profit	30,519,000	[2]	29,968,000		30,331,000	[1]	36,287,000		42,166,000	[2]	33,844,000		39,564,000	[1]	39,537,000		127,105,000		155,111,000		189,087,000
Operating (loss) income	(14,441,000)	[2]	(28,437,000)		(16,504,000)	[1]	(11,426,000)		(6,888,000)	[2]	(23,175,000)		104,168,000	[1]	(18,542,000)		(70,808,000)		55,563,000		(37,610,000)
Net income (loss)	2,530,000	[2]	(31,375,000)		(18,471,000)	[1]	(11,674,000)		3,073,000	[2]	(22,214,000)		80,997,000	[1]	(17,015,000)		(58,990,000)		44,841,000		(27,100,000)
Basic net income (loss) per share available to common shareholders (in dollars per share)	$ 0.07	[2],[4]	$ (0.88)	[4]	$ (0.52)	[1],[4]	$ (0.33)	[4]	$ 0.09	[2],[4]	$ (0.63)	[4]	$ 2.33	[1],[4]	$ (0.49)	[4]	$ (1.66)	[4]	$ 1.29	[4]	$ (0.79)
Diluted net income (loss) per share available to common shareholders (in dollars per share)	$ 0.07	[2],[4]	$ (0.88)	[4]	$ (0.52)	[1],[4]	$ (0.33)	[4]	$ 0.09	[2],[4]	$ (0.63)	[4]	$ 2.32	[1],[4]	$ (0.49)	[4]	$ (1.66)	[4]	$ 1.28	[4]	$ (0.79)
Net gain on sale of other investments													117,900,000						116,400,000
Gain on sale of equity and other investments, net	$ 21,400,000																$ 21,389,000		$ 5,072,000		$ 0

[1] In the quarter ended June 30, 2012, we recognized a net gain of $117.9 million from the sale to Intel of certain patents, patent applications, and related rights. The net gain for the full year 2012 totaled $116.4 million. See Note 1, Description of Business and Summary of Significant Accounting Policies, for additional details.

[2] In the quarter ended December 31, 2013, we sold our remaining shares of common stock in LoEn Entertainment for a net gain of $21.4 million, as described in further detail in Note 5.

[3] December 31, 2012 December 31, 2011 December 31, 2010Components of Cost of Revenue License Fees8,538 11,689 17,794Service Revenue70,553 92,042 108,843Net Revenue Costs79,091 103,731 126,637

[4] The sum of the quarterly net income per share amounts will not necessarily equal net income per share for the year due to the use of weighted average quarterly shares and the effects of rounding.