CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Revenue:
Total revenue, net		$ 39,045	$ 35,490
Cost of revenue:
Total cost of revenue		14,473	14,110
Gross profit		24,572	21,380
Operating expenses:
Sales and marketing	[1]	10,472	9,215
Research and development	[1]	13,822	15,725
General and administrative	[1]	6,576	7,293
Goodwill impairment		50,300	0
Total operating expenses		81,170	32,233
Operating loss		(56,598)	(10,853)
Other income, net		263	314
Net loss		$ (56,335)	$ (10,539)
Net loss per share, basic and diluted (in usd per share)		$ (0.38)	$ (0.07)
Weighted-average shares used to compute basic and diluted net loss per share (in shares)		148,872	143,000
Subscription
Revenue:
Total revenue, net		$ 38,383	$ 33,806
Cost of revenue:
Total cost of revenue	[1]	10,232	8,166
Professional services and other
Revenue:
Total revenue, net		662	1,684
Cost of revenue:
Total cost of revenue	[1]	$ 4,241	$ 5,944

[1] Includes stock-based compensation expense as follows:  Three Months Ended March 31, 20202019Cost of revenue:Cost of subscription$169  $219  Cost of professional services and other116  265  Sales and marketing672  627  Research and development1,163  1,704  General and administrative1,066  1,162