CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue
Revenue	$ 205,236	$ 193,192	$ 179,758
Cost of revenue
Restructuring charge	300		311
Total cost of revenue	42,389	34,922	30,537
Gross profit	162,847	158,270	149,221
Operating expenses:
Research and development	79,556	78,047	75,350
Sales and marketing	97,519	94,204	96,807
General and administrative	30,565	28,880	28,091
Litigation settlement charge			1,143
Restructuring charge	3,282		1,038
Total operating expenses	210,922	201,131	202,429
Operating loss	(48,075)	(42,861)	(53,208)
Other income (expense) - net	1,361	1,124	988
Loss before income taxes	(46,714)	(41,737)	(52,220)
Income tax expense	2,132	1,347	1,142
Net loss	$ (48,846)	$ (43,084)	$ (53,362)
Net loss per share, basic and diluted (in dollars per share)	$ (0.44)	$ (0.42)	$ (0.57)
Weighted-average shares used to compute net loss per share, basic and diluted (in shares)	109,973	102,527	93,770
Cloud subscriptions
Revenue
Revenue	$ 67,034	$ 50,714	$ 38,728
Cost of revenue
Cost of revenue	21,370	12,719	8,847
License
Revenue
Revenue	49,469	59,338	64,035
Cost of revenue
Cost of revenue	2,004	3,270	2,203
Software support and services
Revenue
Revenue	88,733	83,140	76,995
Cost of revenue
Cost of revenue	$ 18,715	$ 18,933	$ 19,176