Consolidated Balance Sheets - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017
Current assets:
Cash and cash equivalents	$ 244,057	$ 183,675
Marketable securities	353,289	362,986
Accounts receivable, net of allowance of $2,000 and $1,062 as of January 31, 2017 and 2018	243,001	168,978
Inventory	34,497	23,498
Deferred commissions, current	22,437	15,787
Prepaid expenses and other current assets	47,552	25,157
Total current assets	944,833	780,081
Property and equipment, net	89,142	81,695
Intangible assets, net	5,057	6,560
Deferred income taxes, non-current	1,060	844
Other assets, non-current	39,315	30,565
Total assets	1,079,407	899,745
Current liabilities:
Accounts payable	84,420	52,719
Accrued compensation and benefits	59,898	39,252
Accrued expenses and other liabilities	26,829	21,697
Deferred revenue, current	209,377	158,095
Liability related to early exercised stock options	320	1,362
Total current liabilities	380,844	273,125
Deferred revenue, non-current	196,632	145,031
Other liabilities, non-current	4,025	3,159
Total liabilities	581,501	421,315
Commitments and contingencies (Note 5)
Stockholders’ equity:
Preferred stock, par value of $0.0001 per share— 20,000 shares authorized as of January 31, 2017 and 2018; no shares issued and outstanding as of January 31, 2017 and 2018	0	0
Class A and Class B common stock, par value of $0.0001 per share— 2,250,000 (Class A 2,000,000, Class B 250,000) shares authorized as of January 31, 2017 and 2018; 204,364 (Class A 87,027, Class B 117,337) and 220,979 (Class A 129,502, Class B 91,477) shares issued and outstanding as of January 31, 2017 and 2018	22	20
Additional paid-in capital	1,479,883	1,281,452
Accumulated other comprehensive loss	(1,917)	(562)
Accumulated deficit	(980,082)	(802,480)
Total stockholders’ equity	497,906	478,430
Total liabilities and stockholders’ equity	$ 1,079,407	$ 899,745