CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Income Statement [Abstract]
Net revenue	[1]	$ 125,296		$ 156,212		$ 206,196
Cost of revenue	[2]	70,297		76,381		79,091
Extinguishment of liability		0		(10,580)		0
Gross profit		54,999		90,411		127,105
Operating expenses:
Research and development		43,626		52,765		60,880
Sales and marketing		48,231		66,926		80,011
General and administrative		24,549		34,001		36,643
Restructuring and other charges		5,279		4,992		5,765
Lease exit and related charges		2,501		880		3,089
Loss on litigation settlements		0		0		11,525
Total operating expenses		124,186		159,564		197,913
Operating (loss) income		(69,187)		(69,153)		(70,808)
Other income (expenses):
Interest income, net		680		556		1,133
Gain (loss) on sale of equity and other investments, net		(159)		2,371		21,389
Equity in net loss of Rhapsody investment		(14,521)		(4,452)		(6,268)
Other income (expense), net		506		143		467
Total other income (expenses), net		(13,494)		(1,382)		16,721
Income (loss) before income taxes		(82,681)		(70,535)		(54,087)
Income tax expense (benefit)		(834)		1,280		4,903
Net income (loss)		$ (81,847)		$ (71,815)		$ (58,990)
Basic net income (loss) (in dollars per share)		$ (2.26)	[3]	$ (2.00)	[3]	$ (1.66)
Diluted net income (loss) (in dollars per share)		$ (2.26)	[3]	$ (2.00)	[3]	$ (1.66)
Shares used to compute basic net income (loss) per share		36,165		35,947		35,553
Shares used to compute diluted net income (loss) per share		36,165		35,947		35,553
Comprehensive income (loss):
Unrealized investment holding gains (losses), net of reclassification adjustments		$ (955)		$ (4,145)		$ (20,288)
Foreign currency translation adjustments, net of reclassification adjustments		(3,273)		(3,412)		(867)
Total other comprehensive income (loss)		(4,228)		(7,557)		(21,155)
Net income (loss)		(81,847)		(71,815)		(58,990)
Comprehensive income (loss)		$ (86,075)		$ (79,372)		$ (80,145)

[1] December 31, 2013 December 31, 2012 December 31, 2011Components of Revenue License Fees28,422 28,308 43,709Service Revenue96,874 127,904 162,487Net Revenue125,296 156,212 206,196

[2] December 31, 2012 December 31, 2011 December 31, 2010Components of Cost of Revenue License Fees6,381 8,012 8,538Service Revenue63,916 68,369 70,553Net Revenue Costs70,297 76,381 79,091

[3] 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.