Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Revenue:
Subscription	$ 14,906		$ 7,463
Professional services	1,045		913
Total revenue	15,951		8,376
Cost of revenue:
Cost of subscription	2,519	[1]	2,712	[1]
Cost of professional services	4,653	[1]	3,871	[1]
Total cost of revenue	7,172		6,583
Gross profit	8,779		1,793
Operating expenses:
Sales and marketing	16,463	[1]	16,560	[1]
Research and development	6,594	[1]	5,527	[1]
General and administrative	5,463	[1]	4,010	[1]
Total operating expenses	28,520		26,097
Operating loss	(19,741)		(24,304)
Other income, net	98		23
Net loss	$ (19,643)		$ (24,281)
Net loss per Class A and B share, basic and diluted	$ (0.21)		$ (0.90)
Weighted-average shares used to compute basic and diluted net loss per Class A and B share	91,786		26,970

[1] Includes stock-based compensation expense as follows: Cost of subscription $33 and $4. Cost of professional services $425 and $140. Sales and marketing $1,751 and $1,174. Research and development $633 and $421. General and administrative $1,027 and $814