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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Apr. 30, 2019	May 31, 2019
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 30, 2019
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Trading Symbol	ZM
Entity Registrant Name	Zoom Video Communications, Inc.
Entity Central Index Key	0001585521
Current Fiscal Year End Date	--01-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Class A Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		32,144,001
Class B Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		240,308,490

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Apr. 30, 2019	Jan. 31, 2019
Current assets:
Cash and cash equivalents	$ 629,793	$ 63,624
Marketable securities	107,389	112,777
Accounts receivable, net of allowances of $2,502 and $2,071 as of April 30, 2019 and January 31, 2019, respectively	78,888	63,613
Deferred contract acquisition costs, current	30,339	26,453
Prepaid expenses and other current assets	19,931	10,252
Total current assets	866,340	276,719
Deferred contract acquisition costs, non-current	32,192	29,063
Property and equipment, net	41,724	37,275
Operating lease right-of-use assets	48,957
Other assets, non-current	9,839	11,508
Total assets	999,052	354,565
Current liabilities:
Accounts payable	9,678	4,963
Accrued expenses and other current liabilities	47,410	32,256
Deferred revenue, current	137,337	115,122
Total current liabilities	194,425	152,341
Deferred revenue, non-current	11,993	10,651
Operating lease liabilities, non-current	46,056
Other liabilities, non-current	26,850	39,460
Total liabilities	279,324	202,452
Commitments and contingencies (Note 7)
Stockholders’ equity (deficit):
Preferred stock, $0.001 par value per share, 200,000,000 and zero shares authorized as of April 30, 2019 and January 31, 2019, respectively; zero shares issued and outstanding as of April 30, 2019 and January 31, 2019
Additional paid-in capital	742,388	17,760
Accumulated other comprehensive income (loss)	8	(135)
Accumulated deficit	(22,939)	(25,153)
Total stockholders’ equity (deficit)	719,728	(7,439)
Total liabilities, convertible preferred stock, and stockholders’ equity (deficit)	999,052	354,565
Convertible Preferred Stock
Current liabilities:
Convertible preferred stock, $0.001 par value per share, zero and 158,104,540 shares authorized as of April 30, 2019 and January 31, 2019, respectively; zero and 152,665,804 shares issued and outstanding as of April 30, 2019 and January 31, 2019, respectively		159,552
Class A Common Stock
Stockholders’ equity (deficit):
Common stock value	$ 271	$ 89

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Apr. 30, 2019	Jan. 31, 2019
Accounts receivable, net of allowances	$ 2,502	$ 2,071
Temporary equity par value	$ 0.001	$ 0.001
Temporary equity, shares authorized	0	158,104,540
Temporary equity, shares issued	0	152,665,804
Temporary equity, shares outstanding	0	152,665,804
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	200,000,000	0
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Class A Common Stock
Common stock, shares authorized	2,000,000,000	320,000,000
Common stock, shares issued	32,144,001	0
Common stock, shares outstanding	32,144,001	0
Class B Common Stock
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	240,192,861	90,327,435
Common stock, shares outstanding	240,192,861	90,327,435

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
Income Statement [Abstract]
Revenue	$ 121,988	$ 60,070
Cost of revenue	24,104	11,660
Gross profit	97,884	48,410
Operating expenses:
Research and development	13,783	6,264
Sales and marketing	64,041	36,261
General and administrative	18,503	7,569
Total operating expenses	96,327	50,094
Income (loss) from operations	1,557	(1,684)
Interest income, net	658	436
Other income, net	315	5
Net income (loss) before provision for income taxes	2,530	(1,243)
Provision for income taxes	(316)	(97)
Net income (loss)	2,214	(1,340)
Undistributed earnings attributable to participating securities	(2,016)
Net income (loss) attributable to common stockholders	$ 198	$ (1,340)
Net income (loss) per share attributable to common stockholders:
Basic	$ 0.00	$ (0.02)
Diluted	$ 0.00	$ (0.02)
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders:
Basic	109,708,898	80,623,861
Diluted	136,428,379	80,623,861

CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) (unaudited) - USD ($) $ in Thousands	Total	Initial public offering	Convertible Preferred Stock	Convertible Preferred Stock Initial public offering	Common Stock	Common Stock Initial public offering	Additional Paid-in Capital	Additional Paid-in Capital Initial public offering	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance at Jan. 31, 2018	$ (26,671)				$ 80		$ 6,517		$ (531)	$ (32,737)
Beginning balance (in shares) at Jan. 31, 2018			152,665,804
Beginning balance at Jan. 31, 2018			$ 159,552
Beginning balance (in shares) at Jan. 31, 2018					82,609,638
Issuance of common stock upon exercise of stock options	238				$ 1		237
Issuance of common stock upon exercise of stock options (in shares)					513,140
Stock-based compensation expense	849						849
Other comprehensive income (loss)	(82)								(82)
Net income (loss)	(1,340)									(1,340)
Ending balance at Apr. 30, 2018	(27,006)				$ 81		7,603		(613)	(34,077)
Ending balance (in shares) at Apr. 30, 2018			152,665,804
Ending balance at Apr. 30, 2018			$ 159,552
Ending balance (in shares) at Apr. 30, 2018					83,122,778
Beginning balance at Jan. 31, 2019	$ (7,439)				$ 89		17,760		(135)	(25,153)
Beginning balance (in shares) at Jan. 31, 2019	152,665,804		152,665,804
Beginning balance at Jan. 31, 2019			$ 159,552
Beginning balance (in shares) at Jan. 31, 2019					90,327,435
Conversion of convertible preferred stock to common stock upon initial public offering		$ 159,552				$ 153		$ 159,399
Conversion of convertible preferred stock to common stock upon initial public offering (in shares)				(152,665,804)
Conversion of convertible preferred stock to common stock upon initial public offering				$ (159,552)
Conversion of convertible preferred stock to common stock upon initial public offering (in shares)						152,665,804
Conversion of convertible promissory notes and accrued interest to common stock upon initial public offering	$ 15,344						15,344
Conversion of convertible promissory notes and accrued interest to common stock upon initial public offering (in shares)					426,223
Issuance of common stock upon initial public offering and private placement, net of underwriting discounts and commissions and other offering costs	541,499				$ 16		541,483
Issuance of common stock upon initial public offering and private placement net of underwriting discounts and commissions and other offering costs (in shares)					15,819,646
Issuance of common stock upon exercise of stock options, net of repurchases	$ 1,753				$ 13		1,740
Issuance of common stock upon exercise of stock options, net of repurchases (in shares)					13,097,754
Issuance of common stock upon exercise of stock options (in shares)	13,622,754
Stock-based compensation expense	$ 6,662						6,662
Other comprehensive income (loss)	143								143
Net income (loss)	2,214									2,214
Ending balance at Apr. 30, 2019	$ 719,728				$ 271		$ 742,388		$ 8	$ (22,939)
Ending balance (in shares) at Apr. 30, 2019	0
Ending balance (in shares) at Apr. 30, 2019					272,336,862

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOW (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
Cash flows from operating activities:
Net income (loss)	$ 2,214	$ (1,340)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	3,324	1,167
Amortization of deferred contract acquisition costs	7,419	3,917
Amortization of operating lease right-of-use assets	1,533
Stock-based compensation expense	6,662	849
Provision for accounts receivable allowances	828	419
Other	257	11
Changes in operating assets and liabilities:
Accounts receivable	(16,103)	(13,359)
Prepaid expenses and other assets	(8,617)	(1,880)
Deferred contract acquisition costs	(14,434)	(9,121)
Accounts payable	4,373	786
Accrued expenses and other liabilities	12,223	3,682
Deferred revenue	23,557	17,628
Operating lease liabilities, net	(1,000)
Net cash provided by operating activities	22,236	2,759
Cash flows from investing activities:
Purchases of marketable securities	(23,312)	(15,500)
Maturities of marketable securities	28,890	11,820
Purchases of property and equipment	(6,897)	(3,850)
Net cash used in investing activities	(1,319)	(7,530)
Cash flows from financing activities:
Proceeds from initial public offering and private placement, net of underwriting discounts and commissions and other offering costs	543,471
Proceeds from exercise of stock options, net of repurchases	1,781	188
Principal payments on capital lease obligations		(53)
Net cash provided by financing activities	545,252	135
Net increase (decrease) in cash, cash equivalents, and restricted cash	566,169	(4,636)
Cash, cash equivalents, and restricted cash – beginning of period	65,968	36,821
Cash, cash equivalents, and restricted cash – end of period	632,137	32,185
Reconciliation of cash, cash equivalents, and restricted cash within the condensed consolidated balance sheets to the amounts shown in the statements of cash flows above:
Cash and cash equivalents	629,793	30,810
Restricted cash, current included in prepaid expenses and other current assets	200
Restricted cash, non-current included in other assets, non-current	$ 2,144	$ 1,375

Summary of Business and Significant Accounting Policies

3 Months Ended

Apr. 30, 2019

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Summary of Business and Significant Accounting Policies

Description of Business

Zoom Video Communications, Inc. and its subsidiaries (together, Zoom, the Company, we, us, or our) provide a video-first, unified communications platform. Our platform combines video, audio, phone, screen sharing, and chat functionalities. We were incorporated in the state of Delaware in April 2011 and are headquartered in San Jose, California.

Fiscal Year

Our fiscal year ends on January 31. References to fiscal 2020, for example, refer to the fiscal year ending January 31, 2020.

Initial Public Offering and Private Placement

On April 23, 2019, we completed our initial public offering (IPO), in which we issued and sold 9,911,434 shares of our Class A common stock at $36.00 per share, resulting in net proceeds of $340.8 million after deducting underwriting discounts and commissions. On April 18, 2019, the underwriters exercised their option to purchase an additional 3,130,435 shares of our Class A common stock at $36.00 per share. This transaction closed on April 23, 2019, resulting in additional proceeds of $107.1 million, net of underwriters' discounts and commissions. In connection with the IPO:

•

all of the shares of convertible preferred stock outstanding automatically converted into an aggregate of 152,665,804 shares of Class B common stock;

•

outstanding convertible promissory notes and accrued interest automatically converted into 426,223 shares of Class A common stock based on the IPO price of $36.00 per share; and

•

Salesforce Ventures LLC purchased 2,777,777 shares of Class A common stock from us at $36.00 per share in a concurrent private placement. We received aggregate proceeds of $100.0 million and did not pay any underwriting discounts or commissions with respect to the shares of Class A common stock that were sold in this private placement.

Deferred offering costs consist primarily of accounting, legal, and other fees related to our IPO. Prior to the IPO, all deferred offering costs were capitalized in other assets, non-current in the condensed consolidated balance sheets. After the IPO, $6.4 million of deferred offering costs were reclassified into stockholders’ equity as a reduction of the IPO proceeds in the condensed consolidated balance sheets. We capitalized $2.4 million of deferred offering costs within other assets, non-current in the condensed consolidated balance sheet as of January 31, 2019.

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (GAAP) and applicable regulations of the Securities and Exchange Commission (SEC) regarding interim financial reporting, and include the accounts of Zoom Video Communications, Inc. and its subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.

The unaudited condensed consolidated balance sheet as of January 31, 2019 included herein was derived from the audited financial statements as of that date, but does not include all disclosures including certain notes required by GAAP on an annual reporting basis. The unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the balance sheets, statements of operations, statements of comprehensive income (loss), statements of convertible preferred stock and stockholders’ equity (deficit), and statements of cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year or any future period.

The unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes included in our final prospectus dated April 17, 2019 (Prospectus) filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933, as amended.

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include, but are not limited to, the estimated expected benefit period for deferred contract acquisition costs, the accounts receivable allowances, the useful lives of long-lived assets, the incremental borrowing rate for operating leases, the valuation of derivative liabilities, the value of common stock and other assumptions used to measure stock-based compensation expense, sales and other tax liabilities, the valuation of deferred income tax assets and uncertain tax positions. Actual results could differ from those estimates.

Summary of Significant Accounting Policies

Our significant accounting policies are discussed in Note 1. “Summary of Business and Significant Accounting Policies” in the Notes to Consolidated Financial Statements in our Prospectus. There have been no significant changes to these policies during the three months ended April 30, 2019, except as noted below.

Leases

All significant lease arrangements are generally recognized at lease commencement. Operating lease right-of-use (ROU) assets and operating lease liabilities are recognized at commencement. For short term leases (an initial term of 12 months or less), a ROU asset and corresponding lease liability are not recorded and we record rent expense in our condensed consolidated statements of operations on a straight-line basis over the lease term and record variable lease payments as incurred. ROU assets represent our right to use an underlying asset during the reasonably certain lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of fixed payments not yet paid over the lease term. We use our incremental borrowing rate based on the information available at the commencement date in determining the lease liabilities as our leases generally do not provide an implicit rate. ROU assets also include any initial direct costs incurred and any lease payments made at or before the lease commencement date, less lease incentives received. We currently do not have any finance leases.

Recently Adopted Accounting Pronouncements

In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-02 (Topic 842), Leases (ASU 2016-02), which supersedes FASB ASC Topic 840, Leases (ASC 840), and makes other conforming amendments to GAAP. ASU 2016-02 requires, among other changes to the lease accounting guidance, lessees to recognize most leases on-balance sheet via a right-of-use asset and lease liability, and additional qualitative and quantitative disclosures. ASU 2016-02 is effective for the annual periods in fiscal years beginning after December 15, 2018, and interim periods therein. We adopted the standard as of February 1, 2019 using the modified retrospective method of applying the new standard at the adoption date. Under this approach, we will continue to report comparative periods presented in the period of adoption under ASC 840. We have elected the package of practical expedients permitted under the transition guidance within the new standard, which allows us to (1) carry forward the historical lease classification, (2) not reassess whether any expired or existing contracts contain leases, and (3) not reassess indirect costs for any existing leases. This election allows us to account for lease components (e.g., fixed payments or variable payments that depend on a rate that can be determined at commencement, including rent for the right to use the asset) together with nonlease components (e.g., other fixed payments that deliver a good or service including common-area maintenance costs) in the calculation of the right-of-use asset and corresponding liability. Adoption of this standard resulted in the recording of ROU assets and total liabilities of $40.5 million and $43.0 million, respectively, with no material impact on retained earnings as of February 1, 2019. See Note 7 for further details.

In June 2018, the FASB issued ASU No. 2018-07, Improvements to Nonemployee Share-Based Payment Accounting (ASU 2018-07). The standard simplifies the accounting for share-based payments granted to nonemployees for goods and services and aligns most of the guidance on such payments to nonemployees with the requirements for share-based payments granted to employees. ASU 2018-07 is effective for the annual periods in fiscal years beginning after December 15, 2018, and interim periods therein, using a modified retrospective approach. We adopted ASU 2018-07 as of February 1, 2019, and our adoption did not have a material impact on the condensed consolidated financial statements.

In August 2018, the FASB issued ASU No. 2018-13 (Topic 820), Fair Value Measurement: Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement (ASU 2018-13). The standard no longer requires disclosure of the amount and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, however public companies will be required to disclose the range and weighted-average used to develop significant unobservable inputs for Level 3 fair value measurements. ASU 2018-13 is effective for the annual periods in fiscal years beginning after December 15, 2019, and interim periods therein, with early adoption permitted. We adopted ASU 2018-13 as of February 1, 2019, and our adoption did not have a material impact on the condensed consolidated financial statements.

Revenue Recognition

3 Months Ended

Apr. 30, 2019

Revenue From Contract With Customer [Abstract]

Revenue Recognition

Disaggregation of Revenue

The following table summarizes revenue by region based on the billing address of customers:

	Three Months Ended April 30,
	2019					2018
	Amount		Percentage of Revenue			Amount		Percentage of Revenue
	(in thousands, except percentages)
Americas	$	98,160		80	%	$	49,559		82	%
APAC		10,441		9			4,742		8
EMEA		13,387		11			5,769		10
Total	$	121,988		100	%	$	60,070		100	%

Contract Balances

We receive payments from customers based on a billing schedule as established in our customer contracts. Accounts receivable are recorded when we contractually have the right to consideration. In some arrangements, a right to consideration for our performance under the customer contract may occur before invoicing to the customer, resulting in an unbilled accounts receivable. The amount of unbilled accounts receivable included within accounts receivable, net on the condensed consolidated balance sheets was $6.9 million and $7.2 million as of April 30, 2019 and January 31, 2019, respectively.

Contract liabilities consist of deferred revenue. Revenue is deferred when we have the right to invoice in advance of performance under a customer contract. The current portion of deferred revenue balances are recognized over the next 12 months. The amount of revenue recognized during the three months ended April 30, 2019 and 2018 that was included in deferred revenue at the beginning of each period was $53.6 million and $23.3 million, respectively.

Remaining Performance Obligation

The terms of our subscription agreements are monthly, annual, and multi-year, and we may bill for the full term in advance or on an annual or monthly basis, depending on the customer preference. As of April 30, 2019, the aggregate amount of the transaction price allocated to remaining performance obligations was $376.5 million, which consists of both billed consideration in the amount of $149.3 million and unbilled consideration in the amount of $227.2 million that we expect to recognize as revenue. We expect to recognize 64% of our remaining performance obligations as revenue over the next 12 months, and the remainder thereafter.

Marketable Securities

3 Months Ended

Apr. 30, 2019

Marketable Securities [Abstract]

Marketable Securities

As of April 30, 2019 and January 31, 2019, our marketable securities consisted of the following:

	April 30, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(in thousands)
Corporate bonds	$	53,717	$	52	$	(30	)	$	53,739
Agency bonds		21,482		5		(29	)		21,458
U.S. government agency securities		32,182		15		(5	)		32,192
Total	$	107,381	$	72	$	(64	)	$	107,389

	January 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(in thousands)
Commercial paper	$	1,243	$	—	$	—		$	1,243
Corporate bonds		53,267		—		(53	)		53,214
Agency bonds		32,675		—		(71	)		32,604
U.S. government agency securities		24,028		—		(11	)		24,017
Treasury bills		1,699		—		—			1,699
Total	$	112,912	$	—	$	(135	)	$	112,777

We review the individual securities that have unrealized losses on a regular basis to evaluate whether or not any security has experienced an other-than-temporary decline in fair value. We evaluate, among other factors, whether we have the intention to sell any of these marketable securities and whether it is more likely than not that we will be required to sell any of them before recovery of the amortized cost basis. Based on the available evidence, we concluded that the gross unrealized losses on the marketable securities as of April 30, 2019 and January 31, 2019, are temporary in nature. There were no material realized gains or losses from available-for-sale securities that were reclassified out of accumulated other comprehensive loss for the three months ended April 30, 2019 and 2018.

The following table presents the contractual maturities of our marketable securities as of April 30, 2019 and January 31, 2019:

	As of
	April 30, 2019		January 31, 2019
	(in thousands)
Less than one year	$	87,589	$	85,077
Due in one to five years		19,800		27,700
Total	$	107,389	$	112,777

Fair Value Measurements

3 Months Ended

Apr. 30, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurements

The following table presents information about our financial instruments that are measured at fair value on a recurring basis using the input categories further discussed in Note 1. “Summary of Business and Significant Accounting Policies” in the Notes to Consolidated Financial Statements in our Prospectus:

	April 30, 2019
	Fair Value		Level 1		Level 2		Level 3
	(in thousands)
Financial Assets:
Money market funds	$	202,605	$	202,605	$	—	$	—
Treasury bills		253,796		—		253,796		—
Cash equivalents		456,401		202,605		253,796		—
Corporate bonds		53,739		—		53,739		—
Agency bonds		21,458		—		21,458		—
U.S. government agency securities		32,192		—		32,192		—
Marketable securities		107,389		—		107,389		—
Certificate of deposit		200		—		200		—
Prepaid expenses and other current assets		200		—		200		—
Certificates of deposit		2,144		—		2,144		—
Other assets, non-current		2,144		—		2,144		—
Total financial assets	$	566,134	$	202,605	$	363,529	$	—

	January 31, 2019
	Fair Value		Level 1		Level 2		Level 3
	(in thousands)
Financial Assets:
Money market funds	$	78	$	78	$	—	$	—
Cash equivalents		78		78		—		—
Commercial paper		1,243		—		1,243		—
Corporate bonds		53,214		—		53,214		—
Agency bonds		32,604		—		32,604		—
U.S. government agency securities		24,017		—		24,017		—
Treasury bills		1,699		—		1,699		—
Marketable securities		112,777		—		112,777		—
Certificate of deposit		200		—		200		—
Prepaid expenses and other current assets		200		—		200		—
Certificates of deposit		2,144		—		2,144		—
Other assets, non-current		2,144		—		2,144		—
Total financial assets	$	115,199	$	78	$	115,121	$	—
Financial Liabilities:
Convertible promissory notes – derivative liabilities	$	163	$	—	$	—	$	163
Other liabilities, non-current		163		—		—		163
Total financial liabilities	$	163	$	—	$	—	$	163

We classify our highly liquid money market funds within Level 1 of the fair value hierarchy because they are valued based on quoted market prices in active markets. We classify our commercial paper, agency bonds, corporate bonds, U.S. government agency securities, treasury bills, and certificates of deposit within Level 2 because they are valued using inputs other than quoted prices which are directly or indirectly observable in the market, including readily-available pricing sources for the identical underlying security which may not be actively traded. We classify the derivative liabilities as Level 3 due to the lack of relevant observable market data over fair value inputs such as the probability-weighting of the various scenarios that can impact settlement of the arrangement. There were no transfers of financial instruments between Level 1, Level 2, and Level 3 during the periods presented.

As discussed in Note 6 below, in connection with the IPO, the fair value of our derivative liabilities associated with our convertible promissory notes were extinguished. The following table sets forth a summary of the changes in the fair value of our Level 3 financial instruments as follows:

	Derivative Liabilities
	(in thousands)
Balance - January 31, 2019	$	163
Extinguishment of derivative liabilities from the convertible promissory notes in connection with the IPO		(163	)
Balance - April 30, 2019	$	—

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Balance Sheet Components

3 Months Ended

Apr. 30, 2019

Balance Sheet Components [Abstract]

Balance Sheet Components

Property and Equipment, Net

Property and equipment consisted of the following:

	As of
	April 30, 2019			January 31, 2019
	(in thousands)
Computer and office equipment	$	36,603		$	32,515
Leasehold improvements		10,900			7,660
Software		6,714			6,575
Furniture and fixtures		2,291			1,993
Property and equipment, gross		56,508			48,743
Less: accumulated depreciation and amortization		(14,784	)		(11,468	)
Property and equipment, net	$	41,724		$	37,275

Depreciation and amortization expense was $3.3 million and $1.2 million for the three months ended April 30, 2019 and 2018, respectively.

Accrued Expenses and Other Current liabilities:

Accrued expenses and other current liabilities consisted of the following:

	As of
	April 30, 2019		January 31, 2019
	(in thousands)
Accrued compensation and benefits	$	17,843	$	12,004
Accrued expenses		16,446		13,596
Operating lease liabilities, current		5,693		—
Liability for early exercise of common stock options		1,808		1,781
Sales and other tax liabilities		1,660		1,183
Other		3,960		3,692
Accrued expenses and other current liabilities	$	47,410	$	32,256

Other Liabilities, Non-current:

Other liabilities, non-current consisted of the following:

	As of
	April 30, 2019		January 31, 2019
	(in thousands)
Sales and other tax liabilities	$	25,359	$	20,817
Convertible promissory notes, net of debt discount		—		14,858
Deferred rent liabilities		—		2,314
Derivative liabilities		—		163
Other		1,491		1,308
Other liabilities, non-current	$	26,850	$	39,460

Operating Lease

3 Months Ended

Apr. 30, 2019

Leases [Abstract]

Operating Leases

We have entered into various operating lease agreements for office space, with remaining contractual periods from less than one year to 10 years. Many of our leases contain one or more options to extend. As leases approach maturity, we consider various factors such as market conditions and the terms of any renewal options that may exist to determine whether we will renew the lease. Operating lease expense for the three months ended April 30, 2019 was $2.5 million including short-term lease expense of $0.4 million.

Supplemental balance sheet information as of April 30, 2019, related to operating leases was as follows:

	As of April 30, 2019
	(in thousands)
Reported as:
Assets:
Operating lease right-of-use assets	$	48,957
Liabilities:
Accrued expenses and other current liabilities	$	5,693
Operating lease liabilities, non-current		46,056
Total operating lease liabilities	$	51,749

As of April 30, 2019, the weighted-average remaining lease term is 7.4 years and the weighted-average discount rate is 5.1%.

Supplemental cash flow and other information for the three months ended April 30, 2019, related to operating leases was as follows:

	Three Months Ended April 30, 2019
	(in thousands)
Cash paid within operating cash flows	$	1,782
Operating lease right-of-use assets recognized in exchange for new operating lease obligations	$	10,018

As of April 30, 2019, the future minimum lease payments included in the measurement of our operating lease liabilities are as follows:

	As of April 30, 2019
	(in thousands)
Year Ending January 31,
2020	$	5,608
2021		7,794
2022		7,663
2023		7,246
2024		6,751
Thereafter		29,058
Total operating lease payments	$	64,120
Less: imputed interest		(12,371	)
Total operating lease liabilities	$	51,749

As of April 30, 2019, we have an additional operating lease for office space that has not yet commenced with undiscounted cash flows of $1.0 million. This operating lease will commence in the next three months.

As previously disclosed in "Note 6. Commitments and Contingencies" to Notes to Consolidated Financial Statements in our Prospectus and under the previous lease accounting standard, future minimum payments related to operating leases as of January 31, 2019 are as follows:

	As of January 31, 2019
	(in thousands)
Year Ending January 31,
2020	$	7,609
2021		7,837
2022		7,888
2023		7,514
2024		7,174
Thereafter		18,635
Total future minimum payments	$	56,657

Rent expense during the three months ended April 30, 2018 was $1.4 million.

Convertible Preferred Stock, Stockholders Equity (Deficit) and Equity Incentive Plan

3 Months Ended

Apr. 30, 2019

Stockholders Equity Note [Abstract]

Convertible Preferred Stock, Stockholders Equity (Deficit) and Equity Incentive Plan

Convertible Preferred Stock, Stockholders’ Equity (Deficit) and Equity Incentive Plan

Convertible Preferred Stock

Upon completion of the IPO, all shares of convertible preferred stock outstanding, totaling 152,665,804 shares, were automatically converted into an equivalent number of shares of Class B common stock on a one-to-one basis and their carrying value of $159.6 million was reclassified into stockholders’ equity. As of April 30, 2019, there were no shares of convertible preferred stock issued and outstanding.

In connection with the IPO, our Amended and Restated Certificate of Incorporation (COI) became effective, which authorized the issuance of 200,000,000 shares of undesignated preferred stock with a par value of $0.001 with rights and preferences, including voting rights, designated from time to time by our board of directors.

Common Stock

Our Amended and Restated COI also authorized the issuance of 2,000,000,000 shares of Class A common stock, $0.001 par value per share and 300,000,000 shares of Class B common stock, $0.001 par value per share. Class A and Class B common stock are referred to as common stock throughout the notes to the condensed consolidated financial statements, unless otherwise noted.

Equity Incentive Plans

In 2011, we adopted the 2011 Global Share Plan (2011 Plan), under which officers, employees, and consultants may be granted various forms of equity incentive compensation at the discretion of the board of directors, including stock options and restricted stock awards. The awards have varying terms, but generally vest over four years, and are issued at the Fair Market Value (as defined in the 2011 Plan) of the shares of common stock on the date of grant. Certain awards provide for accelerated vesting if there is a Change in Control (as defined in the 2011 Plan). As of January 31, 2019, our board of directors had authorized 71,240,000 shares of common stock to be reserved for grants of awards under the 2011 Plan. As of January 31, 2019, stock options covering 35,064,465 shares of our Class B common stock were outstanding and the remaining number of shares available for future issuance was 1,848,100 under the 2011 Plan. In connection with the IPO, the shares of Class B common stock remaining available for issuance under the 2011 Plan became available for issuance for a corresponding number of shares of our Class A common stock under the 2019 Equity Incentive Plan (2019 Plan).

In April 2019, we adopted the 2019 Plan, which is a successor to and continuation of our 2011 Plan. Our 2019 Plan provides for the grant of stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards, performance awards, and other forms of awards. The maximum number of shares of our Class A common stock that may be issued under our 2019 Plan will not exceed 58,300,889 shares of our Class A common stock, which is the sum of (1) 34,000,000 new shares, plus (2) an additional number of shares not to exceed 24,300,889, consisting of (A) shares that remain available for the issuance of awards under our 2011 Plan as of immediately prior to the time our 2019 Plan becomes effective and (B) shares of Class B common stock subject to outstanding stock options or other stock awards granted under our 2011 Plan that, on or after the 2019 Plan becomes effective, terminate or expire prior to exercise or settlement; are not issued because the award is settled in cash; are forfeited because of the failure to vest; or are reacquired or withheld (or not issued) to satisfy a tax withholding obligation or the purchase or exercise price, if any, as such shares become available from time to time. In addition, the number of shares of our Class A common stock reserved for issuance under our 2019 Plan will automatically increase on February 1 of each calendar year, starting on February 1, 2020 through February 1, 2029, in an amount equal to (i) 5% of the total number of shares of our common stock (both Class A and Class B) outstanding on January 31 of the fiscal year before the date of each automatic increase, or (ii) a lesser number of shares determined by our board of directors prior to the applicable February 1.

A summary of stock option activity under our equity incentive plan and related information is as follows:

	Options Outstanding
						Weighted-
				Weighted-		Average
	Outstanding			Average		Remaining		Aggregate
	Stock			Exercise		Contractual		Intrinsic
	Options			Price		Life (Years)		Value
	(in thousands, except share, life, and per share data)
Balance as of January 31, 2019		35,064,465		$	1.48		6.8	$	534,572
Granted		1,324,650			27.42
Exercised		(13,622,754	)		0.14
Cancelled/forfeited/expired		(142,301	)		4.60
Balance as of April 30, 2019		22,624,060		$	3.78		8.2	$	1,554,000
Vested as of April 30, 2019		7,516,678		$	0.76		7.1	$	539,010

As of April 30, 2019, unrecognized stock-based compensation expense related to outstanding unvested stock options was $93.6 million, which is expected to be recognized over a weighted-average period of 3.4 years.

2019 Employee Stock Purchase Plan

In April 2019, we adopted the 2019 Employee Stock Purchase Plan (ESPP), which became effective in connection with the IPO. A total of 9,000,000 shares of our Class A common stock were initially reserved for issuance under the ESPP. The number of shares of our Class A common stock reserved for issuance will automatically increase on February 1 of each calendar year, beginning on February 1, 2020 through February 1, 2029, by the lesser of (1) 1% of the total number of shares of our common stock (both Class A and Class B) outstanding on the last day of the fiscal year before the date of the automatic increase, and (2) 7,500,000 shares; provided that before the date of any such increase, our board of directors may determine that such increase will be less than the amount set forth in clauses (1) and (2).

Generally, all regular employees, including executive officers, employed by us or by any of our designated affiliates, except for those holding five percent or more of the total combined voting power or value of all classes of our stock, may participate in the ESPP and may contribute, normally through payroll deductions, up to 20% of their earnings (as defined in the ESPP) for the purchase of our Class A common stock under the ESPP. Unless otherwise determined by our board of directors, Class A common stock will be purchased for the accounts of employees participating in the ESPP at a price per share that is at least the lesser of (1) 85% of the fair market value of a share of our Class A common stock on the first date of an offering, or (2) 85% of the fair market value of a share of our Class A common stock on the date of purchase. No employee may purchase shares under the ESPP at a rate in excess of $25,000 worth of our Class A common stock based on the fair market value per share of our Class A common stock at the beginning of an offering for each calendar year such purchase right is outstanding. The initial offering period began on April 18, 2019. As of April 30, 2019, no shares of our Class A common stock have been purchased under the ESPP.

Early Exercise of Common Stock Options

Our board of directors authorized certain stock option holders to exercise unvested options to purchase shares of common stock. Shares received from such early exercises are subject to repurchase in the event of the optionee’s termination of service, at the original issuance price, until the options are fully vested. As of April 30, 2019 and January 31, 2019, 697,564 and 1,261,230 shares of Class B common stock were subject to repurchase at a weighted-average price of $2.59 and $1.41 per share, respectively. As of April 30, 2019 and January 31, 2019, the cash proceeds received for unvested shares of common stock recorded within accrued expenses and other current liabilities in the condensed consolidated balance sheets were $1.8 million and $1.8 million, respectively.

Restricted Stock Award

In October 2015, we issued 1,202,720 shares of common stock to a member of our board of directors under a restricted stock agreement at a grant date fair value of $0.14 per share, totaling $0.2 million. Of the total shares issued, 481,088 shares vested on the grant date and the remaining shares vest over four years from the grant date. The unvested shares are subject to a repurchase right held by us at the original purchase price. As of April 30, 2019, 180,408 shares of common stock were unvested and subject to repurchase.

Stock-Based Compensation

The stock-based compensation expense by line item in the accompanying condensed consolidated statements of operations is summarized as follows:

	Three Months Ended April 30,
	2019		2018
	(in thousands)
Cost of revenue	$	830	$	95
Research and development		1,164		129
Sales and marketing		2,627		396
General and administrative		2,041		229
Total stock-based compensation expense	$	6,662	$	849

Net Income (Loss) Per Share Attributable to Common Stockholders

3 Months Ended

Apr. 30, 2019

Earnings Per Share [Abstract]

Net Income (Loss) Per Share Attributable to Common Stockholders

10.

Net Income (Loss) Per Share Attributable to Common Stockholders

The following table sets forth the computation of basic and diluted net income (loss) per share attributable to common stockholders for the periods presented:

	Three Months Ended April 30,
	2019						2018
	Class A			Class B			Class A		Class B
Numerator:	(in thousands, except per share data)
Net income (loss)	$	—		$	2,214		$	—	$	(1,340	)
Less: undistributed earnings attributable to participating securities		—			(2,016	)		—		—
Reallocation of net income attributable to common stockholders		15			(15	)		—		—
Net income (loss) attributable to common stockholders, basic	$	15		$	183		$	—	$	(1,340	)
Reallocation of net income attributable to common stockholders		(3	)		3			—		—
Net income (loss) attributable to common stockholders, diluted	$	12		$	186		$	—	$	(1,340	)
Denominator:
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, basic		8,393,169			101,315,729			—		80,623,861
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, diluted		8,393,391			128,034,988			—		80,623,861
Net income (loss) per share attributable to common stockholders, basic	$	0.00		$	0.00		$	—	$	(0.02	)
Net income (loss) per share attributable to common stockholders, diluted	$	0.00		$	0.00		$	—	$	(0.02	)

The potential shares of common stock that were excluded from the computation of diluted net income (loss) per share attributable to common stockholders for the periods presented because including them would have been antidilutive are as follows:

	As of April 30,
	2019				2018
	Class A		Class B		Class A		Class B
Convertible preferred stock		—		—		—		152,665,804
Outstanding stock options		161,650		19,663		—		35,724,598
Shares subject to repurchase from early exercised stock options and restricted stock		—		—		—		2,052,483
Total		161,650		19,663		—		190,442,885

Summary of Business and Significant Accounting Policies (Policies)	3 Months Ended
	Apr. 30, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Fiscal Year	Fiscal Year Our fiscal year ends on January 31. References to fiscal 2020, for example, refer to the fiscal year ending January 31, 2020.
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (GAAP) and applicable regulations of the Securities and Exchange Commission (SEC) regarding interim financial reporting, and include the accounts of Zoom Video Communications, Inc. and its subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. The unaudited condensed consolidated balance sheet as of January 31, 2019 included herein was derived from the audited financial statements as of that date, but does not include all disclosures including certain notes required by GAAP on an annual reporting basis. The unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the balance sheets, statements of operations, statements of comprehensive income (loss), statements of convertible preferred stock and stockholders’ equity (deficit), and statements of cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year or any future period.
Use of Estimates	Use of Estimates The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include, but are not limited to, the estimated expected benefit period for deferred contract acquisition costs, the accounts receivable allowances, the useful lives of long-lived assets, the incremental borrowing rate for operating leases, the valuation of derivative liabilities, the value of common stock and other assumptions used to measure stock-based compensation expense, sales and other tax liabilities, the valuation of deferred income tax assets and uncertain tax positions. Actual results could differ from those estimates.
Leases	Leases All significant lease arrangements are generally recognized at lease commencement. Operating lease right-of-use (ROU) assets and operating lease liabilities are recognized at commencement. For short term leases (an initial term of 12 months or less), a ROU asset and corresponding lease liability are not recorded and we record rent expense in our condensed consolidated statements of operations on a straight-line basis over the lease term and record variable lease payments as incurred. ROU assets represent our right to use an underlying asset during the reasonably certain lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of fixed payments not yet paid over the lease term. We use our incremental borrowing rate based on the information available at the commencement date in determining the lease liabilities as our leases generally do not provide an implicit rate. ROU assets also include any initial direct costs incurred and any lease payments made at or before the lease commencement date, less lease incentives received. We currently do not have any finance leases.
Recently Adopted and Issued Accounting Pronouncements	Recently Adopted Accounting Pronouncements In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-02 (Topic 842), Leases (ASU 2016-02), which supersedes FASB ASC Topic 840, Leases (ASC 840), and makes other conforming amendments to GAAP. ASU 2016-02 requires, among other changes to the lease accounting guidance, lessees to recognize most leases on-balance sheet via a right-of-use asset and lease liability, and additional qualitative and quantitative disclosures. ASU 2016-02 is effective for the annual periods in fiscal years beginning after December 15, 2018, and interim periods therein. We adopted the standard as of February 1, 2019 using the modified retrospective method of applying the new standard at the adoption date. Under this approach, we will continue to report comparative periods presented in the period of adoption under ASC 840. We have elected the package of practical expedients permitted under the transition guidance within the new standard, which allows us to (1) carry forward the historical lease classification, (2) not reassess whether any expired or existing contracts contain leases, and (3) not reassess indirect costs for any existing leases. This election allows us to account for lease components (e.g., fixed payments or variable payments that depend on a rate that can be determined at commencement, including rent for the right to use the asset) together with nonlease components (e.g., other fixed payments that deliver a good or service including common-area maintenance costs) in the calculation of the right-of-use asset and corresponding liability. Adoption of this standard resulted in the recording of ROU assets and total liabilities of $40.5 million and $43.0 million, respectively, with no material impact on retained earnings as of February 1, 2019. See Note 7 for further details. In June 2018, the FASB issued ASU No. 2018-07, Improvements to Nonemployee Share-Based Payment Accounting (ASU 2018-07). The standard simplifies the accounting for share-based payments granted to nonemployees for goods and services and aligns most of the guidance on such payments to nonemployees with the requirements for share-based payments granted to employees. ASU 2018-07 is effective for the annual periods in fiscal years beginning after December 15, 2018, and interim periods therein, using a modified retrospective approach. We adopted ASU 2018-07 as of February 1, 2019, and our adoption did not have a material impact on the condensed consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-13 (Topic 820), Fair Value Measurement: Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement (ASU 2018-13). The standard no longer requires disclosure of the amount and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, however public companies will be required to disclose the range and weighted-average used to develop significant unobservable inputs for Level 3 fair value measurements. ASU 2018-13 is effective for the annual periods in fiscal years beginning after December 15, 2019, and interim periods therein, with early adoption permitted. We adopted ASU 2018-13 as of February 1, 2019, and our adoption did not have a material impact on the condensed consolidated financial statements.

Marketable Securities (Tables)

3 Months Ended

Apr. 30, 2019

Marketable Securities [Abstract]

Summary of Marketable Securities

As of April 30, 2019 and January 31, 2019, our marketable securities consisted of the following:

	April 30, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(in thousands)
Corporate bonds	$	53,717	$	52	$	(30	)	$	53,739
Agency bonds		21,482		5		(29	)		21,458
U.S. government agency securities		32,182		15		(5	)		32,192
Total	$	107,381	$	72	$	(64	)	$	107,389

	January 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(in thousands)
Commercial paper	$	1,243	$	—	$	—		$	1,243
Corporate bonds		53,267		—		(53	)		53,214
Agency bonds		32,675		—		(71	)		32,604
U.S. government agency securities		24,028		—		(11	)		24,017
Treasury bills		1,699		—		—			1,699
Total	$	112,912	$	—	$	(135	)	$	112,777

Summary of Contractual Maturities of Marketable Securities

The following table presents the contractual maturities of our marketable securities as of April 30, 2019 and January 31, 2019:

	As of
	April 30, 2019		January 31, 2019
	(in thousands)
Less than one year	$	87,589	$	85,077
Due in one to five years		19,800		27,700
Total	$	107,389	$	112,777

Fair Value Measurements (Tables)

3 Months Ended

Apr. 30, 2019

Fair Value Disclosures [Abstract]

Schedule of Financial Instruments Measured at Fair Value on Recurring Basis

	April 30, 2019
	Fair Value		Level 1		Level 2		Level 3
	(in thousands)
Financial Assets:
Money market funds	$	202,605	$	202,605	$	—	$	—
Treasury bills		253,796		—		253,796		—
Cash equivalents		456,401		202,605		253,796		—
Corporate bonds		53,739		—		53,739		—
Agency bonds		21,458		—		21,458		—
U.S. government agency securities		32,192		—		32,192		—
Marketable securities		107,389		—		107,389		—
Certificate of deposit		200		—		200		—
Prepaid expenses and other current assets		200		—		200		—
Certificates of deposit		2,144		—		2,144		—
Other assets, non-current		2,144		—		2,144		—
Total financial assets	$	566,134	$	202,605	$	363,529	$	—

	January 31, 2019
	Fair Value		Level 1		Level 2		Level 3
	(in thousands)
Financial Assets:
Money market funds	$	78	$	78	$	—	$	—
Cash equivalents		78		78		—		—
Commercial paper		1,243		—		1,243		—
Corporate bonds		53,214		—		53,214		—
Agency bonds		32,604		—		32,604		—
U.S. government agency securities		24,017		—		24,017		—
Treasury bills		1,699		—		1,699		—
Marketable securities		112,777		—		112,777		—
Certificate of deposit		200		—		200		—
Prepaid expenses and other current assets		200		—		200		—
Certificates of deposit		2,144		—		2,144		—
Other assets, non-current		2,144		—		2,144		—
Total financial assets	$	115,199	$	78	$	115,121	$	—
Financial Liabilities:
Convertible promissory notes – derivative liabilities	$	163	$	—	$	—	$	163
Other liabilities, non-current		163		—		—		163
Total financial liabilities	$	163	$	—	$	—	$	163

Summary of Changes in Fair Value of Financial Instruments

The following table sets forth a summary of the changes in the fair value of our Level 3 financial instruments as follows:

	Derivative Liabilities
	(in thousands)
Balance - January 31, 2019	$	163
Extinguishment of derivative liabilities from the convertible promissory notes in connection with the IPO		(163	)
Balance - April 30, 2019	$	—

Balance Sheet Components (Tables)

3 Months Ended

Apr. 30, 2019

Balance Sheet Components [Abstract]

Schedule of Property and Equipment

Property and equipment consisted of the following:

	As of
	April 30, 2019			January 31, 2019
	(in thousands)
Computer and office equipment	$	36,603		$	32,515
Leasehold improvements		10,900			7,660
Software		6,714			6,575
Furniture and fixtures		2,291			1,993
Property and equipment, gross		56,508			48,743
Less: accumulated depreciation and amortization		(14,784	)		(11,468	)
Property and equipment, net	$	41,724		$	37,275

Schedule of Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following:

	As of
	April 30, 2019		January 31, 2019
	(in thousands)
Accrued compensation and benefits	$	17,843	$	12,004
Accrued expenses		16,446		13,596
Operating lease liabilities, current		5,693		—
Liability for early exercise of common stock options		1,808		1,781
Sales and other tax liabilities		1,660		1,183
Other		3,960		3,692
Accrued expenses and other current liabilities	$	47,410	$	32,256

Schedule of Other Liabilities Non Current

Other liabilities, non-current consisted of the following:

	As of
	April 30, 2019		January 31, 2019
	(in thousands)
Sales and other tax liabilities	$	25,359	$	20,817
Convertible promissory notes, net of debt discount		—		14,858
Deferred rent liabilities		—		2,314
Derivative liabilities		—		163
Other		1,491		1,308
Other liabilities, non-current	$	26,850	$	39,460

Operating Lease (Tables)

3 Months Ended

Apr. 30, 2019

Leases [Abstract]

Schedule of Supplemental Balance Sheet Information

Supplemental balance sheet information as of April 30, 2019, related to operating leases was as follows:

	As of April 30, 2019
	(in thousands)
Reported as:
Assets:
Operating lease right-of-use assets	$	48,957
Liabilities:
Accrued expenses and other current liabilities	$	5,693
Operating lease liabilities, non-current		46,056
Total operating lease liabilities	$	51,749

Schedule of Supplemental Cash flow Information

Supplemental cash flow and other information for the three months ended April 30, 2019, related to operating leases was as follows:

	Three Months Ended April 30, 2019
	(in thousands)
Cash paid within operating cash flows	$	1,782
Operating lease right-of-use assets recognized in exchange for new operating lease obligations	$	10,018

Schedule of Future Minimum Lease Payments included in Measurement of Operating Lease Liabilities

As of April 30, 2019, the future minimum lease payments included in the measurement of our operating lease liabilities are as follows:

	As of April 30, 2019
	(in thousands)
Year Ending January 31,
2020	$	5,608
2021		7,794
2022		7,663
2023		7,246
2024		6,751
Thereafter		29,058
Total operating lease payments	$	64,120
Less: imputed interest		(12,371	)
Total operating lease liabilities	$	51,749

Schedule of Future Minimum Payments Related to Operating Leases

	As of January 31, 2019
	(in thousands)
Year Ending January 31,
2020	$	7,609
2021		7,837
2022		7,888
2023		7,514
2024		7,174
Thereafter		18,635
Total future minimum payments	$	56,657

Convertible Preferred Stock, Stockholders (Deficit) Equity and Equity Incentive Plan (Tables)

3 Months Ended

Apr. 30, 2019

Stockholders Equity Note [Abstract]

Summary of Stock Option Activity Under Equity Incentive Plan

A summary of stock option activity under our equity incentive plan and related information is as follows:

	Options Outstanding
						Weighted-
				Weighted-		Average
	Outstanding			Average		Remaining		Aggregate
	Stock			Exercise		Contractual		Intrinsic
	Options			Price		Life (Years)		Value
	(in thousands, except share, life, and per share data)
Balance as of January 31, 2019		35,064,465		$	1.48		6.8	$	534,572
Granted		1,324,650			27.42
Exercised		(13,622,754	)		0.14
Cancelled/forfeited/expired		(142,301	)		4.60
Balance as of April 30, 2019		22,624,060		$	3.78		8.2	$	1,554,000
Vested as of April 30, 2019		7,516,678		$	0.76		7.1	$	539,010

Summary of Stock-based Compensation Expense by Line Item

The stock-based compensation expense by line item in the accompanying condensed consolidated statements of operations is summarized as follows:

	Three Months Ended April 30,
	2019		2018
	(in thousands)
Cost of revenue	$	830	$	95
Research and development		1,164		129
Sales and marketing		2,627		396
General and administrative		2,041		229
Total stock-based compensation expense	$	6,662	$	849

Net Income (Loss) Per Share Attributable to Common Stockholders (Tables)

3 Months Ended

Apr. 30, 2019

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted Net Income (Loss) Per Share

The following table sets forth the computation of basic and diluted net income (loss) per share attributable to common stockholders for the periods presented:

	Three Months Ended April 30,
	2019						2018
	Class A			Class B			Class A		Class B
Numerator:	(in thousands, except per share data)
Net income (loss)	$	—		$	2,214		$	—	$	(1,340	)
Less: undistributed earnings attributable to participating securities		—			(2,016	)		—		—
Reallocation of net income attributable to common stockholders		15			(15	)		—		—
Net income (loss) attributable to common stockholders, basic	$	15		$	183		$	—	$	(1,340	)
Reallocation of net income attributable to common stockholders		(3	)		3			—		—
Net income (loss) attributable to common stockholders, diluted	$	12		$	186		$	—	$	(1,340	)
Denominator:
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, basic		8,393,169			101,315,729			—		80,623,861
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, diluted		8,393,391			128,034,988			—		80,623,861
Net income (loss) per share attributable to common stockholders, basic	$	0.00		$	0.00		$	—	$	(0.02	)
Net income (loss) per share attributable to common stockholders, diluted	$	0.00		$	0.00		$	—	$	(0.02	)

Summary of Potential Shares of Common Stock Excluded from Computation of Diluted Net Loss Per Share Attributable to Common Stockholders

	As of April 30,
	2019				2018
	Class A		Class B		Class A		Class B
Convertible preferred stock		—		—		—		152,665,804
Outstanding stock options		161,650		19,663		—		35,724,598
Shares subject to repurchase from early exercised stock options and restricted stock		—		—		—		2,052,483
Total		161,650		19,663		—		190,442,885

Summary of Business and Significant Accounting Policies - Additional Information (Details) - USD ($)			3 Months Ended
	Apr. 23, 2019	Apr. 18, 2019	Apr. 30, 2019	Feb. 01, 2019	Jan. 31, 2019
Summary Of Business And Significant Accounting Policies [Line Items]
Operating lease, total ROU assets			$ 48,957,000
Operating lease, total liabilities			51,749,000
Accounting Standards Update 2016-02
Summary Of Business And Significant Accounting Policies [Line Items]
Operating lease, total ROU assets				$ 40,500,000
Operating lease, total liabilities				43,000,000
Accounting Standards Update 2016-02 \| Accumulated Deficit
Summary Of Business And Significant Accounting Policies [Line Items]
Impact of adoption of new standard				$ 0
Other Assets, Non-current
Summary Of Business And Significant Accounting Policies [Line Items]
Capitalized deferred offering costs within other assets, non-current					$ 2,400,000
Initial public offering
Summary Of Business And Significant Accounting Policies [Line Items]
Deferred offering costs, reclassified to stockholders' equity			$ 6,400,000
Initial public offering \| Class A Common Stock
Summary Of Business And Significant Accounting Policies [Line Items]
Shares issued	9,911,434
Shares issued, price per share	$ 36.00
Net proceeds from shares issued	$ 340,800,000
Initial public offering \| Class A Common Stock \| Underwriters
Summary Of Business And Significant Accounting Policies [Line Items]
Shares issued		3,130,435
Shares issued, price per share		$ 36.00
Net proceeds from shares issued	$ 107,100,000
Initial public offering \| Class B Common Stock
Summary Of Business And Significant Accounting Policies [Line Items]
Convertible securities converted to common stock, shares	152,665,804
Initial public offering \| Class B Common Stock \| Convertible Promissory Notes
Summary Of Business And Significant Accounting Policies [Line Items]
Shares issued, price per share	$ 36.00
Convertible securities converted to common stock, shares	426,223
Initial public offering \| Convertible Preferred Stock
Summary Of Business And Significant Accounting Policies [Line Items]
Convertible securities converted to common stock, shares	152,665,804
Private Placement \| Class A Common Stock
Summary Of Business And Significant Accounting Policies [Line Items]
Shares issued	2,777,777
Shares issued, price per share	$ 36.00
Aggregate proceeds from shares issued	$ 100,000,000

Fair Value Measurements - Schedule of Financial Instruments Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Apr. 30, 2019	Jan. 31, 2019
Financial Assets:
Marketable securities	$ 107,389	$ 112,777
Treasury Bills
Financial Assets:
Marketable securities		1,699
Fair Value ,Recurring Basis
Financial Assets:
Cash equivalents	456,401	78
Marketable securities	107,389	112,777
Prepaid expenses and other current assets	200	200
Other assets, non-current	2,144	2,144
Total financial assets	566,134	115,199
Financial Liabilities:
Convertible promissory notes – derivative liabilities		163
Total financial liabilities		163
Fair Value ,Recurring Basis \| Convertible Promissory Notes
Financial Liabilities:
Convertible promissory notes – derivative liabilities		163
Fair Value ,Recurring Basis \| Treasury Bills
Financial Assets:
Cash equivalents	253,796
Marketable securities		1,699
Fair Value ,Recurring Basis \| Corporate Bond
Financial Assets:
Marketable securities	53,739	53,214
Fair Value ,Recurring Basis \| Agency Bonds
Financial Assets:
Marketable securities	21,458	32,604
Fair Value ,Recurring Basis \| Certificates Of Deposit
Financial Assets:
Prepaid expenses and other current assets	200	200
Other assets, non-current	2,144	2,144
Fair Value ,Recurring Basis \| Money Market Funds
Financial Assets:
Cash equivalents	202,605	78
Fair Value ,Recurring Basis \| Commercial Paper
Financial Assets:
Marketable securities		1,243
Fair Value ,Recurring Basis \| U.S. Government Agency Securities
Financial Assets:
Marketable securities	32,192	24,017
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 1
Financial Assets:
Cash equivalents	202,605	78
Marketable securities	0
Prepaid expenses and other current assets	0
Other assets, non-current	0
Total financial assets	202,605	78
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 1 \| Treasury Bills
Financial Assets:
Cash equivalents	0
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 1 \| Corporate Bond
Financial Assets:
Marketable securities	0
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 1 \| Agency Bonds
Financial Assets:
Marketable securities	0
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 1 \| Certificates Of Deposit
Financial Assets:
Prepaid expenses and other current assets	0
Other assets, non-current	0
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 1 \| Money Market Funds
Financial Assets:
Cash equivalents	202,605	78
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 1 \| U.S. Government Agency Securities
Financial Assets:
Marketable securities	0
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 2
Financial Assets:
Cash equivalents	253,796
Marketable securities	107,389	112,777
Prepaid expenses and other current assets	200	200
Other assets, non-current	2,144	2,144
Total financial assets	363,529	115,121
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 2 \| Treasury Bills
Financial Assets:
Cash equivalents	253,796
Marketable securities		1,699
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 2 \| Corporate Bond
Financial Assets:
Marketable securities	53,739	53,214
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 2 \| Agency Bonds
Financial Assets:
Marketable securities	21,458	32,604
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 2 \| Certificates Of Deposit
Financial Assets:
Prepaid expenses and other current assets	200	200
Other assets, non-current	2,144	2,144
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 2 \| Money Market Funds
Financial Assets:
Cash equivalents	0
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 2 \| Commercial Paper
Financial Assets:
Marketable securities		1,243
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 2 \| U.S. Government Agency Securities
Financial Assets:
Marketable securities	32,192	24,017
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 3
Financial Assets:
Cash equivalents	0
Marketable securities	0
Prepaid expenses and other current assets	0
Other assets, non-current	0
Total financial assets	0
Financial Liabilities:
Convertible promissory notes – derivative liabilities		163
Total financial liabilities		163
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 3 \| Convertible Promissory Notes
Financial Liabilities:
Convertible promissory notes – derivative liabilities		$ 163
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 3 \| Treasury Bills
Financial Assets:
Cash equivalents	0
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 3 \| Corporate Bond
Financial Assets:
Marketable securities	0
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 3 \| Agency Bonds
Financial Assets:
Marketable securities	0
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 3 \| Certificates Of Deposit
Financial Assets:
Prepaid expenses and other current assets	0
Other assets, non-current	0
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 3 \| Money Market Funds
Financial Assets:
Cash equivalents	0
Fair Value ,Recurring Basis \| Fair Value, Inputs, Level 3 \| U.S. Government Agency Securities
Financial Assets:
Marketable securities	$ 0

Convertible Promissory Notes - Additional Information (Details) - Convertible Promissory Notes $ / shares in Units, $ in Millions	3 Months Ended
	Apr. 30, 2019 USD ($) $ / shares shares
Debt Instrument [Line Items]
Debt instrument term	3 years
Derivative liabilities	$ 0.2
Unamortized debt discount of notes	$ 0.1
Initial public offering
Debt Instrument [Line Items]
Debt conversion, converted instrument, shares issued \| shares	426,223
Share price per share \| $ / shares	$ 36.00
Dropbox
Debt Instrument [Line Items]
Debt instrument face amount	$ 5.0
Interest rate percentage	2.75%
Atlassian
Debt Instrument [Line Items]
Debt instrument face amount	$ 10.0
Interest rate percentage	5.00%

Operating Leases - Schedule of Future Minimum Payments Related to Operating Leases (Details) $ in Thousands	Jan. 31, 2019 USD ($)
Leases [Abstract]
2020	$ 7,609
2021	7,837
2022	7,888
2023	7,514
2024	7,174
Thereafter	18,635
Total future minimum payments	$ 56,657

Convertible Preferred Stock, Stockholders Equity (Deficit) and Equity Incentive Plan - Additional Information (Details) - USD ($)		1 Months Ended			3 Months Ended
	Apr. 23, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2015	Apr. 30, 2019	Apr. 30, 2018	Jan. 31, 2018
Class Of Stock [Line Items]
Temporary equity, shares issued		0	152,665,804		0
Convertible preferred stock outstanding		0	152,665,804		0
Undesignated preferred stock shares authorized		200,000,000	0		200,000,000
Undesignated referred stock par value		$ 0.001	$ 0.001		$ 0.001
Common stock, par value		$ 0.001	$ 0.001		$ 0.001
Stock options outstanding		22,624,060	35,064,465		22,624,060
Unrecognized stock-based compensation expenses related to outstanding unvested stock options		$ 93,600,000			$ 93,600,000
Unrecognized stock-based compensation excepted to be recognized over a weighted-average period					3 years 4 months 24 days
Proceeds from unvested shares of common stock		$ 1,800,000	$ 1,800,000
Restricted Stock Awards \| Common Stock
Class Of Stock [Line Items]
Number of shares of common stock unvested and subject to repurchase		180,408			180,408
Restricted Stock Awards \| Board of Directors
Class Of Stock [Line Items]
Vesting period of awards				4 years
Shares issued of common stock				1,202,720
Grant date fair value				$ 0.14
Shares issued of common stock, value				$ 200,000
Shares vested on the grant date				481,088
2011 Plan
Class Of Stock [Line Items]
Vesting period of awards					4 years
Shares of common stock reserved for grants of awards			71,240,000
2011 Plan \| Maximum
Class Of Stock [Line Items]
Number of shares available for future issuance		24,300,889			24,300,889
2019 Plan
Class Of Stock [Line Items]
Percentage of shares reserved increase		5.00%			5.00%
Initial public offering
Class Of Stock [Line Items]
Conversion of convertible preferred stock to common stock upon initial public offering					$ 159,552,000
Undesignated preferred stock shares authorized		200,000,000			200,000,000
Undesignated referred stock par value		$ 0.001			$ 0.001
Initial public offering \| Common Stock
Class Of Stock [Line Items]
Convertible securities converted to common stock, shares					152,665,804
Conversion of convertible preferred stock to common stock upon initial public offering					$ 153,000
Employee Stock Purchase Plan
Class Of Stock [Line Items]
Payroll deductions to participate in plan		20.00%			20.00%
Employee Stock Purchase Plan \| 2019 Employee Stock Purchase Plan \| Maximum
Class Of Stock [Line Items]
Annual increase in Number of shares of common stock available for future issuance		7,500,000
Convertible Preferred Stock
Class Of Stock [Line Items]
Convertible preferred stock outstanding			152,665,804			152,665,804	152,665,804
Convertible Preferred Stock \| Initial public offering
Class Of Stock [Line Items]
Convertible securities converted to common stock, shares	152,665,804
Temporary equity conversion basis					one-to-one
Conversion of convertible preferred stock to common stock upon initial public offering	$ 159,600,000
Class A Common Stock
Class Of Stock [Line Items]
Common stock, shares authorized		2,000,000,000	320,000,000		2,000,000,000
Number of shares purchased under ESPP		0
ESPP excess rate purachse right, value		$ 25,000
Class A Common Stock \| 2019 Plan
Class Of Stock [Line Items]
Numbers of additional shares authorized under the plan		34,000,000
Class A Common Stock \| 2019 Plan \| Maximum
Class Of Stock [Line Items]
Number of shares available for future issuance		58,300,889			58,300,889
Class A Common Stock \| Initial public offering
Class Of Stock [Line Items]
Common stock, shares authorized		2,000,000,000			2,000,000,000
Common stock, par value		$ 0.001			$ 0.001
Class A Common Stock \| Employee Stock Purchase Plan
Class Of Stock [Line Items]
Percentage of purchase price of common stock to fair market value of common stock on offering date		85.00%
Percentage of purchase price of common stock to fair market value of common stock on purchase date		85.00%
Class A Common Stock \| Employee Stock Purchase Plan \| 2019 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Number of shares available for future issuance		9,000,000			9,000,000
Class B Common Stock
Class Of Stock [Line Items]
Common stock, shares authorized		300,000,000	300,000,000		300,000,000
Number of common stock subject to repurchase		697,564	1,261,230
Weighted average price per share		$ 2.59	$ 1.41		$ 2.59
Class B Common Stock \| 2011 Plan
Class Of Stock [Line Items]
Stock options outstanding			35,064,465
Number of shares available for future issuance			1,848,100
Class B Common Stock \| Initial public offering
Class Of Stock [Line Items]
Convertible securities converted to common stock, shares	152,665,804
Common stock, shares authorized		300,000,000			300,000,000
Common stock, par value		$ 0.001			$ 0.001
Class A and Class B Common Stock \| Employee Stock Purchase Plan \| 2019 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Annual increase in shares for available for future issuance by percentage of the outstanding ordinary shares on the first day of such fiscal year.		1.00%

Convertible Preferred Stock, Stockholders Equity (Deficit) and Equity Incentive Plan - Summary of Stock Option Activity Under Equity Incentive Plan (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 30, 2019	Jan. 31, 2019
Stockholders Equity Note [Abstract]
Outstanding Stock Options, Beginning balance	35,064,465
Outstanding Stock Options, Granted	1,324,650
Outstanding Stock Options Exercised	(13,622,754)
Outstanding Stock Options Cancelled/forfeited/expired	(142,301)
Outstanding Stock Options, Ending balance	22,624,060	35,064,465
Outstanding Stock Options, Vested	7,516,678
Weighted Average Exercise Price, Beginning balance	$ 1.48
Weighted Average Exercise Price, Granted	27.42
Weighted Average Exercise Price Exercised	0.14
Weighted Average Exercise Price Cancelled/forfeited/expired	4.60
Weighted Average Exercise price, Ending balance	3.78	$ 1.48
Weighted Average Exercise price, Vested	$ 0.76
Weighted-Average Remaining Contractual Life (Years)	8 years 2 months 12 days	6 years 9 months 18 days
Weighted-Average Remaining Contractual Life (Years), Vested	7 years 1 month 6 days
Options Outstanding, Aggregate Intrinsic Value, Beginning balance	$ 534,572
Options Outstanding, Aggregate Intrinsic Value, Ending balance	1,554,000	$ 534,572
Options Outstanding, Aggregate Intrinsic Value, Vested	$ 539,010

Net Income (Loss) Per Share Attributable to Common Stockholders - Schedule of Computation of Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
Numerator:
Net income (loss)	$ 2,214	$ (1,340)
Net income (loss) attributable to common stockholders	$ 198	$ (1,340)
Denominator:
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, basic	109,708,898	80,623,861
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, diluted	136,428,379	80,623,861
Net income (loss) per share attributable to common stockholders, basic	$ 0.00	$ (0.02)
Net income (loss) per share attributable to common stockholders, diluted	$ 0.00	$ (0.02)
Class A Common Stock
Numerator:
Reallocation of net income attributable to common stockholders	$ 15
Net income (loss) attributable to common stockholders	15
Reallocation of net income attributable to common stockholders	(3)
Net income (loss) attributable to common stockholders, diluted	$ 12
Denominator:
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, basic	8,393,169
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, diluted	8,393,391
Net income (loss) per share attributable to common stockholders, basic	$ 0.00
Net income (loss) per share attributable to common stockholders, diluted	$ 0.00
Class B Common Stock
Numerator:
Net income (loss)	$ 2,214	$ (1,340)
Less: undistributed earnings attributable to participating securities	(2,016)
Reallocation of net income attributable to common stockholders	(15)
Net income (loss) attributable to common stockholders	183	(1,340)
Reallocation of net income attributable to common stockholders	3
Net income (loss) attributable to common stockholders, diluted	$ 186	$ (1,340)
Denominator:
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, basic	101,315,729	80,623,861
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, diluted	128,034,988	80,623,861
Net income (loss) per share attributable to common stockholders, basic	$ 0.00	$ (0.02)
Net income (loss) per share attributable to common stockholders, diluted	$ 0.00	$ (0.02)

Revenue Recognition - Summary Disaggregation of Revenue by Region (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
Disaggregation Of Revenue [Line Items]
Revenue	$ 121,988	$ 60,070
Percentage of revenue	100.00%	100.00%
Americas [Member]
Disaggregation Of Revenue [Line Items]
Revenue	$ 98,160	$ 49,559
Percentage of revenue	80.00%	82.00%
Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Revenue	$ 10,441	$ 4,742
Percentage of revenue	9.00%	8.00%
EMEA [Member]
Disaggregation Of Revenue [Line Items]
Revenue	$ 13,387	$ 5,769
Percentage of revenue	11.00%	10.00%

Revenue Recognition - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Jan. 31, 2019
Revenue From Contract With Customer [Abstract]
Unbilled contracts receivable	$ 6.9		$ 7.2
Revenue recognized included in deferred revenue	$ 53.6	$ 23.3

Revenue Recognition - Additional Information (Details1) $ in Millions	Apr. 30, 2019 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-05-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 376.5
Revenue remaining performance obligation, expected timing of satisfaction period	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-02-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation percentage	64.00%
Revenue remaining performance obligation, expected timing of satisfaction period	1 year
Billed consideration \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-05-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 149.3
Unbilled consideration \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-05-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 227.2

Fair Value Measurements - Additional Information (Details)	3 Months Ended
	Apr. 30, 2018 USD ($)
Fair Value Disclosures [Abstract]
Fair value, transfers into level 1	$ 0
Fair value, transfers out of level 1	0
Fair value, transfers into level 2	0
Fair value, transfers out of level 2	0
Fair value, transfers into level 3	0
Fair value, transfers out of level 3	$ 0

Operating Leases - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
Lessee Lease Description [Line Items]
Operating Lease, Expense	$ 2.5
Short-term lease expense	$ 0.4
Weighted-average remaining lease term	7 years 4 months 24 days
Weighted-average discount rate	5.10%
Operating lease that has not yet commenced with undiscounted cash flows	$ 1.0
Rent expense		$ 1.4
Minimum
Lessee Lease Description [Line Items]
Lease contractual period	1 year
Maximum
Lessee Lease Description [Line Items]
Lease contractual period	10 years

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 2,214	$ (1,340)
Other comprehensive loss:
Unrealized gain (loss) on available for sale marketable securities, net of tax	143	(82)
Comprehensive income (loss)	$ 2,357	$ (1,422)

Marketable Securities - Summary of Marketable Securities (Details) - USD ($) $ in Thousands	Apr. 30, 2019	Jan. 31, 2019
Marketable Securities [Line Items]
Amortized Cost	$ 107,381	$ 112,912
Gross Unrealized Gains	72	0
Gross Unrealized Losses	(64)	(135)
Estimated Fair Value	107,389	112,777
Corporate Bonds
Marketable Securities [Line Items]
Amortized Cost	53,717	53,267
Gross Unrealized Gains	52	0
Gross Unrealized Losses	(30)	(53)
Estimated Fair Value	53,739	53,214
Agency Bonds
Marketable Securities [Line Items]
Amortized Cost	21,482	32,675
Gross Unrealized Gains	5	0
Gross Unrealized Losses	(29)	(71)
Estimated Fair Value	21,458	32,604
U.S. Government Agency Securities
Marketable Securities [Line Items]
Amortized Cost	32,182	24,028
Gross Unrealized Gains	15	0
Gross Unrealized Losses	(5)	(11)
Estimated Fair Value	$ 32,192	24,017
Commercial Paper
Marketable Securities [Line Items]
Amortized Cost		1,243
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Estimated Fair Value		1,243
Treasury Bills
Marketable Securities [Line Items]
Amortized Cost		1,699
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Estimated Fair Value		$ 1,699

Marketable Securities - Summary of Contractual Maturities of Marketable Securities (Details) - USD ($) $ in Thousands	Apr. 30, 2019	Jan. 31, 2019
Marketable Securities [Abstract]
Less than one year	$ 87,589	$ 85,077
Due in one to five years	19,800	27,700
Total	$ 107,389	$ 112,777

Fair Value Measurements - Summary of Changes in Fair Value of Financial Instruments (Details) - Fair Value, Inputs, Level 3 $ in Thousands	3 Months Ended
	Apr. 30, 2019 USD ($)
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 163
Convertible Promissory Notes
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Extinguishment of derivative liabilities from the convertible promissory notes in connection with the IPO	$ (163)

Balance Sheet Components - Schedule of Property and Equipment Net (Details) - USD ($) $ in Thousands	Apr. 30, 2019	Jan. 31, 2019
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 56,508	$ 48,743
Less: accumulated depreciation and amortization	(14,784)	(11,468)
Property and equipment, net	41,724	37,275
Computer and Office Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	36,603	32,515
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	2,291	1,993
Software
Property Plant And Equipment [Line Items]
Property and equipment, gross	6,714	6,575
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 10,900	$ 7,660

Balance Sheet Components - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Apr. 30, 2019	Jan. 31, 2019
Balance Sheet Components [Abstract]
Accrued compensation and benefits	$ 17,843	$ 12,004
Accrued expenses	16,446	13,596
Operating lease liabilities, current	5,693
Liability for early exercise of common stock options	1,808	1,781
Sales and other tax liabilities	1,660	1,183
Other	3,960	3,692
Accrued expenses and other current liabilities	$ 47,410	$ 32,256

Balance Sheet Components - Schedule of Other Liabilities Non Current (Details) - USD ($) $ in Thousands	Apr. 30, 2019	Jan. 31, 2019
Balance Sheet Components [Abstract]
Sales and other tax liabilities	$ 25,359	$ 20,817
Convertible promissory notes, net of debt discount		14,858
Deferred rent liabilities		2,314
Derivative liabilities		163
Other	1,491	1,308
Other liabilities, non-current	$ 26,850	$ 39,460

Operating Leases - Schedule of Supplemental Balance Sheet Information (Details) $ in Thousands	Apr. 30, 2019 USD ($)
Assets
Operating lease right-of-use assets	$ 48,957
Liabilities:
Lease liabilities, current	5,693
Operating lease liabilities, non-current	46,056
Total operating lease liabilities	$ 51,749

Operating Leases - Schedule of Future Minimum Lease Payments included in Measurement of Operating Lease Liabilities (Details) $ in Thousands	Apr. 30, 2019 USD ($)
Leases [Abstract]
2020	$ 5,608
2021	7,794
2022	7,663
2023	7,246
2024	6,751
Thereafter	29,058
Total operating lease payments	64,120
Less: imputed interest	(12,371)
Total operating lease liabilities	$ 51,749

Convertible Preferred Stock, Stockholders Equity (Deficit) and Equity Incentive Plan - Summary of Stock-based Compensation Expense by Line Item (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 6,662	$ 849
Cost of Revenue
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	830	95
Research and Development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	1,164	129
Sales and Marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	2,627	396
General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 2,041	$ 229

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
Income Taxes (Details) - USD ($) $ in Thousands	Apr. 30, 2019	Apr. 30, 2018
Income Tax Disclosure [Abstract]
Income tax expense	$ 316	$ 97

Related Party Transactions - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
Veeva
Related Party Transaction [Line Items]
Revenue from related party	$ 0.3	$ 0.3

Subsequent Events - Additional Information (Details) - Subsequent Event $ in Millions	May 01, 2019 USD ($)
Subsequent Event [Line Items]
Additional rent payments	$ 14.8
Lease expiration date	Jan. 31, 2030