Condensed Consolidated Statements of Operations and Comprehensive Loss (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenue:
Subscription and support	$ 19,883	$ 12,379	$ 37,438	$ 23,400
Professional services and other	2,621	1,549	4,802	2,739
Total revenue	22,504	13,928	42,240	26,139
Cost of revenue:
Subscription and support	6,321	3,607	12,141	6,742
Professional services and other	3,121	2,101	5,739	3,906
Total cost of revenue	9,442	5,708	17,880	10,648
Gross profit:
Subscription and support	13,562	8,772	25,297	16,658
Professional services and other	(500)	(552)	(937)	(1,167)
Total gross profit	13,062	8,220	24,360	15,491
Operating expenses:
Research and development	5,985	5,339	10,981	9,174
Sales and marketing	15,488	9,788	27,806	17,607
General and administrative	3,876	3,020	7,303	5,275
Total operating expenses	25,349	18,147	46,090	32,056
Loss from operations	(12,287)	(9,927)	(21,730)	(16,565)
Other income (expense), net	(86)		(147)	(15)
Loss before provision for income taxes	(12,373)	(9,927)	(21,877)	(16,580)
Provision for income taxes	17	0	37	3
Net loss	(12,390)	(9,927)	(21,914)	(16,583)
Net loss per share of common stock, basic and diluted (in dollars per share)	$ (0.63)	$ (3.61)	$ (1.91)	$ (6.25)
Shares used in computing net loss per share of common stock, basic and diluted	19,822	2,752	11,472	2,655
Comprehensive loss:
Net loss	(12,390)	(9,927)	(21,914)	(16,583)
Other comprehensive income (loss):
Foreign currency translation adjustments	(26)	9	12	19
Comprehensive loss	$ (12,416)	$ (9,918)	$ (21,902)	$ (16,564)