CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Net revenue	[1]	$ 33,112	$ 29,734	$ 63,687	$ 57,964
Cost of revenue	[2]	17,290	15,698	34,583	30,870
Gross profit		15,822	14,036	29,104	27,094
Operating expenses:
Research and development		7,584	7,167	14,933	16,486
Sales and marketing		5,496	7,749	12,651	16,974
General and administrative		5,254	6,217	10,557	14,294
Restructuring and other charges		150	413	1,714	798
Lease exit and related charges		0	127	0	958
Total operating expenses		18,484	21,673	39,855	49,510
Operating income (loss)		(2,662)	(7,637)	(10,751)	(22,416)
Other income (expenses):
Interest income, net		109	80	237	197
Gain (loss) on investments, net		0	(46)	0	(43)
Equity in net loss of Rhapsody investment		(349)	(396)	(1,097)	(396)
Other income (expense), net		(13)	15	(238)	(272)
Total other income (expenses), net		(253)	(347)	(1,098)	(514)
Income (loss) before income taxes		(2,915)	(7,984)	(11,849)	(22,930)
Income tax expense (benefit)		471	363	961	588
Net income (loss)		$ (3,386)	$ (8,347)	$ (12,810)	$ (23,518)
Basic net income (loss) per share (USD per share)		$ (0.09)	$ (0.23)	$ (0.35)	$ (0.64)
Diluted net income (loss) per share (USD per share)		$ (0.09)	$ (0.23)	$ (0.35)	$ (0.64)
Shares used to compute basic net income (loss) per share		37,103	36,755	37,067	36,637
Shares used to compute diluted net income (loss) per share		37,103	36,755	37,067	36,637
Comprehensive income (loss):
Unrealized investment holding gains (losses), net of reclassification adjustments		$ 6	$ 16	$ 10	$ 167
Foreign currency translation adjustments, net of reclassification adjustments		646	(645)	1,240	55
Total other comprehensive income (loss)		652	(629)	1,250	222
Net income (loss)		(3,386)	(8,347)	(12,810)	(23,518)
Comprehensive income (loss)		$ (2,734)	$ (8,976)	$ (11,560)	$ (23,296)

[1] Quarters ended June 30, Components of Revenue2017 2016License Fees9,084 6,678Service Revenue24,028 23,056Net Revenue33,112 29,734 Six Months Ended June 30, Components of Revenue2017 2016License Fees$15,677 $12,455Service Revenue48,010 45,509Net Revenue$63,687 $57,964

[2] Quarters ended June 30, Components of Cost of Revenue2017 2016License Fees2,215 1,399Service Revenue15,075 14,299Net Revenue Costs17,290 15,698 Six Months Ended June 30, Components of Cost of Revenue2017 2016License Fees$3,726 $2,703Service Revenue30,857 28,167Net Revenue Costs$34,583 $30,870