CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Net revenue	[1]	$ 120,468	$ 125,296	$ 156,212
Cost of revenue	[2]	64,968	70,297	76,381
Extinguishment of liability		0	0	(10,580)
Gross profit		55,500	54,999	90,411
Operating expenses:
Research and development		29,923	43,626	52,765
Sales and marketing		31,608	48,231	66,926
General and administrative		27,415	24,549	34,001
Restructuring and other charges		1,489	5,279	4,992
Lease exit and related charges		2,239	2,501	880
Total operating expenses		92,674	124,186	159,564
Operating (loss) income		(37,174)	(69,187)	(69,153)
Other income (expenses):
Interest income, net		449	680	556
Gain (loss) on sale of equity and other investments, net		8,473	(159)	2,371
Equity in net loss of Rhapsody investment		(6,533)	(14,521)	(4,452)
Other income (expense), net		(643)	506	143
Total other income (expenses), net		1,746	(13,494)	(1,382)
Income (loss) before income taxes		(35,428)	(82,681)	(70,535)
Income tax expense (benefit)		1,122	(834)	1,280
Net income (loss)		$ (36,550)	$ (81,847)	$ (71,815)
Basic net income (loss) (in dollars per share)		$ (0.99)	$ (2.26)	$ (2.00)
Diluted net income (loss) (in dollars per share)		$ (0.99)	$ (2.26)	$ (2.00)
Shares used to compute basic net income (loss) per share		36,781	36,165	35,947
Shares used to compute diluted net income (loss) per share		36,781	36,165	35,947
Comprehensive income (loss):
Unrealized investment holding gains (losses), net of reclassification adjustments		$ (1,303)	$ (955)	$ (4,145)
Foreign currency translation adjustments, net of reclassification adjustments		(862)	(3,273)	(3,412)
Net current period other comprehensive income		(2,165)	(4,228)	(7,557)
Net income (loss)		(36,550)	(81,847)	(71,815)
Comprehensive income (loss)		$ (38,715)	$ (86,075)	$ (79,372)

[1] December 31, 2016 December 31, 2015 December 31, 2014Components of Revenue License Fees27,846 28,422 28,308Service Revenue92,622 96,874 127,904Net Revenue120,468 125,296 156,212

[2] December 31, 2016 December 31, 2015 December 31, 2014Components of Cost of Revenue License Fees6,062 6,381 8,012Service Revenue58,906 63,916 68,369Net Revenue Costs64,968 70,297 76,381