CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jan. 31, 2018	Jan. 31, 2017		Jan. 31, 2018	Jan. 31, 2017
Revenue:
Product	$ 223,170	$ 158,213		$ 442,222	$ 311,749
Support and other services	63,574	41,001		120,074	76,026
Total revenue	286,744	199,214	[1]	562,296	387,775
Cost of revenue:
Product	83,217	58,403		168,379	110,613
Support and other services	25,311	18,443		48,771	35,995
Total cost of revenue	108,528	76,846	[1]	217,150	146,608
Gross profit	178,216	122,368	[1]	345,146	241,167
Operating expenses:
Sales and marketing	151,201	111,374		296,606	239,999
Research and development	70,924	70,914		135,436	146,195
General and administrative	15,948	15,481		32,000	44,853
Total operating expenses	238,073	197,769	[1]	464,042	431,047
Loss from operations	(59,857)	(75,401)	[1]	(118,896)	(189,880)
Other expense—net	(861)	(421)		(1,050)	(26,133)
Loss before provision for income taxes	(60,718)	(75,822)	[1]	(119,946)	(216,013)
Provision for income taxes	1,913	547		4,172	658
Net loss	$ (62,631)	$ (76,369)	[1]	$ (124,118)	$ (216,671)
Net loss per share attributable to common stockholders—basic and diluted (in dollars per share)	$ (0.39)	$ (0.54)	[1]	$ (0.78)	$ (2.00)
Weighted-average shares used in computing net loss per share attributable to common stockholders—basic and diluted (in shares)	161,737,428	141,996,600		159,251,964	108,185,194

[1] See Note 3 for a summary of adjustments related to the adoption of the new revenue recognition standard.