UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue:
Revenue	$ 50,992	$ 38,691	$ 99,426	$ 74,636
Cost of revenue:
Cost of revenue	11,104	8,391	21,319	15,992
Gross profit	39,888	30,300	78,107	58,644
Operating expenses:
Sales and marketing	35,161	24,731	65,839	49,090
Research and development	16,084	12,572	31,006	24,119
General and administrative	7,850	5,414	18,276	10,343
Total operating expenses	59,095	42,717	115,121	83,552
Loss from operations	(19,207)	(12,417)	(37,014)	(24,908)
Interest income (expense), net	411	14	456	(17)
Change in fair value of warrant liability	(5,957)	(2)	(8,838)	124
Other income (expense), net	(494)	139	(374)	113
Loss before income taxes	(25,247)	(12,266)	(45,770)	(24,688)
Provision for income taxes	34	69	105	86
Net loss and comprehensive loss	(25,281)	(12,335)	(45,875)	(24,774)
Comprehensive loss	(25,281)	(12,335)	(45,875)	(24,774)
Accretion of preferred stock to redemption value	(159,453)	3,323	(199,492)	(8,324)
Net loss attributable to common stockholders	$ (184,734)	$ (9,012)	$ (245,367)	$ (33,098)
Net loss per share attributable to common stockholders - basic and diluted	$ (4.13)	$ (0.88)	$ (8.73)	$ (3.27)
Weighted-average common shares outstanding - basic and diluted	44,759,435	10,255,078	28,104,372	10,116,021
Subscription, License and Support
Revenue:
Revenue	$ 47,891	$ 35,749	$ 93,282	$ 68,754
Cost of revenue:
Cost of revenue	8,051	5,744	15,263	10,575
Services
Revenue:
Revenue	3,101	2,942	6,144	5,882
Cost of revenue:
Cost of revenue	$ 3,053	$ 2,647	$ 6,056	$ 5,417