Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net revenue:
Products and license	$ 22,486	$ 30,451	$ 58,157	$ 71,450
Services	45,921	32,898	127,896	90,134
Total net revenue	68,407	63,349	186,053	161,584
Cost of revenue:
Products and license	2,394	2,741	6,392	7,535
Services	11,354	9,148	32,841	26,250
Total cost of revenue	13,748	11,889	39,233	33,785
Gross profit	54,659	51,460	146,820	127,799
Operating expenses:
Research and development	15,289	13,183	46,884	38,973
Sales and marketing	38,128	31,806	119,845	97,130
General and administrative	12,669	11,401	38,800	32,781
Amortization of acquired intangible assets	352	352	1,056	1,056
Total operating expenses	66,438	56,742	206,585	169,940
Loss from operations	(11,779)	(5,282)	(59,765)	(42,141)
Other income (expense), net	107	91	(51)	(213)
Loss before provision for income taxes	(11,672)	(5,191)	(59,816)	(42,354)
Provision for income taxes	66	556	645	747
Net loss	$ (11,738)	$ (5,747)	$ (60,461)	$ (43,101)
Net loss per share of common stock stockholders, basic and diluted	$ (0.36)	$ (0.19)	$ (1.88)	$ (1.47)
Shares used in computing net loss per share of common stock, basic and diluted	32,445	30,797	32,130	29,362