Condensed Consolidated Statements of Operations and Comprehensive Loss (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenue:
Subscription	$ 29,905	$ 18,905
Services	2,273	1,609
Total revenue	32,178	20,514
Cost of revenue:
Subscription	5,434	3,964
Services	3,474	2,518
Total cost of revenue	8,908	6,482
Gross profit	23,270	14,032
Operating expenses:
Sales and marketing	16,483	11,376
Research and development	6,971	4,740
General and administrative	8,312	5,233
Total operating expenses	31,766	21,349
Loss from operations	(8,496)	(7,317)
Other income (expense):
Interest income	66	62
Interest expense	(53)	(79)
Other expense	(11)	(419)
Other income (expense), net	2	(436)
Loss before income taxes	(8,494)	(7,753)
Income tax expense	265	219
Net loss	(8,759)	(7,972)
Net loss per share, basic and diluted	$ (0.25)	$ (0.27)
Weighted average common shares outstanding, basic and diluted	34,412	29,958
Net loss	(8,759)	(7,972)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	6	(57)
Unrealized loss on marketable securities	(3)	(10)
Comprehensive loss	$ (8,756)	$ (8,039)