Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net revenue:
Products and license	$ 97,122	$ 86,798	$ 107,563
Services	224,594	177,657	126,735
Total net revenue	321,716	264,455	234,298
Cost of revenue:
Products and license	7,738	9,525	10,947
Services	56,215	44,307	36,633
Total cost of revenue	63,953	53,832	47,580
Gross profit	257,763	210,623	186,718
Operating expenses:
Research and development	63,452	62,402	53,376
Sales and marketing	152,178	156,465	136,292
General and administrative	54,435	51,260	43,440
Restructuring charges	667	8,118	0
Amortization of acquired intangible assets	714	1,408	1,408
Total operating expenses	271,446	279,653	234,516
Loss from operations	(13,683)	(69,030)	(47,798)
Gain on sale of business	35,871	0	0
Other income (expense), net	1,142	(77)	(402)
Income (loss) before provision for income taxes	23,330	(69,107)	(48,200)
Provision for income taxes	461	1,172	682
Net income (loss)	$ 22,869	$ (70,279)	$ (48,882)
Earnings per share:
Basic	$ 0.68	$ (2.18)	$ (1.64)
Diluted	$ 0.67	$ (2.18)	$ (1.64)
Shares used in computing earnings per share
Basic	33,724	32,284	29,849
Diluted	34,238	32,284	29,849