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Cover Page - shares	3 Months Ended
Cover Page - shares	Apr. 30, 2020	Jun. 02, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Apr. 30, 2020
Document Transition Report	false
Entity File Number	001-38240
Entity Registrant Name	MONGODB, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-1463205
Entity Address, Address Line One	1633 Broadway,
Entity Address, Address Line Two	38th Floor
Entity Address, City or Town	New York,
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10019
City Area Code	646
Local Phone Number	727-4092
Title of 12(b) Security	Class A Common Stock, par value $0.001 per share
Trading Symbol	MDB
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001441816
Current Fiscal Year End Date	--01-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Amendment Flag	false
Class A Common Stock
Entity Common Stock, Shares Outstanding		50,682,490
Class B Common Stock
Entity Common Stock, Shares Outstanding		7,443,035

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Apr. 30, 2020	Jan. 31, 2020
Current assets:
Cash and cash equivalents	$ 700,645	$ 706,192
Short-term investments	276,372	280,326
Accounts receivable, net of allowance for doubtful accounts of $4,327 and $2,515 as of April 30, 2020 and January 31, 2020, respectively	80,760	85,554
Deferred commissions	25,737	24,219
Prepaid expenses and other current assets	16,892	16,905
Total current assets	1,100,406	1,113,196
Property and equipment, net	57,914	58,316
Operating lease right-of-use assets	32,965	11,147
Goodwill	55,830	55,830
Acquired intangible assets, net	32,650	34,779
Deferred tax assets	680	615
Other assets	56,397	54,684
Total assets	1,336,842	1,328,567
Current liabilities:
Accounts payable	3,184	2,849
Accrued compensation and benefits	33,649	41,427
Operating lease liabilities (current)	4,005	3,750
Other accrued liabilities	27,112	26,860
Deferred revenue	173,067	167,498
Total current liabilities	241,017	242,384
Deferred tax liability, non-current	821	821
Operating lease liabilities, non-current	29,625	8,113
Deferred revenue, non-current	19,954	23,281
Convertible senior notes, net	923,098	911,075
Other liabilities, non-current	59,286	60,035
Total liabilities	1,273,801	1,245,709
Commitments and contingencies (Note 7)
Stockholders’ equity:
Additional paid-in capital	785,730	752,127
Treasury stock, 99,371 shares (repurchased at an average of $13.27 per share) as of April 30, 2020 and January 31, 2020	(1,319)	(1,319)
Accumulated other comprehensive income	998	225
Accumulated deficit	(722,426)	(668,232)
Total stockholders’ equity	63,041	82,858
Total liabilities and stockholders’ equity	1,336,842	1,328,567
Class A Common Stock
Stockholders’ equity:
Common stock	50	48
Class B Common Stock
Stockholders’ equity:
Common stock	$ 8	$ 9

CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 30, 2020	Jan. 31, 2019	Jan. 31, 2020
Current assets:
Allowance for doubtful accounts	$ 4,327		$ 2,515
Stockholders’ equity:
Treasury stock (in shares)	99,371		99,371
Average repurchase price of treasury stock shares (in dollars per share)	$ 13.27	$ 13.27
Class A Common Stock
Stockholders’ equity:
Common stock, par value (in dollars per share)	$ 0.001		$ 0.001
Common stock authorized (in shares)	1,000,000,000		1,000,000,000
Common stock issued (in shares)	50,358,480		48,512,090
Common stock outstanding (in shares)	50,358,480		48,512,090
Class B Common Stock
Stockholders’ equity:
Common stock, par value (in dollars per share)	$ 0.001		$ 0.001
Common stock authorized (in shares)	100,000,000		100,000,000
Common stock issued (in shares)	7,738,326		8,969,824
Common stock outstanding (in shares)	7,638,955		8,870,453

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Revenue:
Total revenue	$ 130,329	$ 89,388
Cost of revenue:
Total cost of revenue	37,677	28,172
Gross profit	92,652	61,216
Operating expenses:
Sales and marketing	69,125	46,120
Research and development	45,632	30,868
General and administrative	19,935	14,805
Total operating expenses	134,692	91,793
Loss from operations	(42,040)	(30,577)
Other income (expense):
Interest income	2,727	2,303
Interest expense	(13,795)	(4,689)
Other expense, net	(625)	(415)
Loss before provision for income taxes	(53,733)	(33,378)
Provision (benefit) for income taxes	234	(138)
Net loss	$ (53,967)	$ (33,240)
Net loss per share, basic and diluted (in dollars per share)	$ (0.94)	$ (0.61)
Weighted-average shares used to compute net loss per share, basic and diluted (in shares)	57,649,524	54,710,746
Subscription
Revenue:
Total revenue	$ 124,856	$ 83,994
Cost of revenue:
Total cost of revenue	30,625	22,595
Services
Revenue:
Total revenue	5,473	5,394
Cost of revenue:
Total cost of revenue	$ 7,052	$ 5,577

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (53,967)	$ (33,240)
Other comprehensive income, net of tax:
Unrealized gain on available-for-sale securities	848	58
Foreign currency translation adjustment	(75)	13
Other comprehensive income	773	71
Total comprehensive loss	$ (53,194)	$ (33,169)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Class A and Class B Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjustment Accumulated Deficit
Beginning balance (in shares) at Jan. 31, 2019		54,321,810
Beginning balance at Jan. 31, 2019	$ 264,566	$ 54	$ 754,612	$ (1,319)	$ (174)	$ (488,607)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)		831,901
Stock option exercises	6,438	$ 1	6,437
Repurchase of early exercised options (in shares)		(3,981)
Vesting of early exercised stock options	127		127
Vesting of restricted stock units (in shares)		126,346
Stock-based compensation	14,009		14,009
Unrealized gain on available-for-sale securities	58				58
Foreign currency translation adjustment	13				13
Net loss	(33,240)					(33,240)
Ending balance (in shares) at Apr. 30, 2019		55,276,076
Ending balance at Apr. 30, 2019	247,868	$ 55	775,185	(1,319)	(103)	(525,950)	$ (4,103)	$ (4,103)
Beginning balance (in shares) at Jan. 31, 2020		57,382,543
Beginning balance at Jan. 31, 2020	$ 82,858	$ 57	752,127	(1,319)	225	(668,232)	$ (227)	$ (227)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)	373,394	373,394
Stock option exercises	$ 2,995	$ 1	2,994
Repurchase of early exercised options (in shares)		(79)
Vesting of early exercised stock options	42		42
Vesting of restricted stock units (in shares)		241,569
Stock-based compensation	30,567		30,567
Conversion of 2024 convertible senior notes (in shares)		8
Unrealized gain on available-for-sale securities	848				848
Foreign currency translation adjustment	(75)				(75)
Net loss	(53,967)					(53,967)
Ending balance (in shares) at Apr. 30, 2020		57,997,435
Ending balance at Apr. 30, 2020	$ 63,041	$ 58	$ 785,730	$ (1,319)	$ 998	$ (722,426)

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Cash flows from operating activities
Net loss	$ (53,967)	$ (33,240)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	2,864	2,298
Stock-based compensation	30,567	14,009
Amortization of debt discount and issuance costs	12,023	3,221
Amortization of finance right-of-use assets	994	994
Amortization of operating right-of-use assets	1,372	220
Non-cash interest on finance lease liabilities	0	905
Deferred income taxes	(290)	(557)
Accretion of discount on short-term investments	(193)	(1,509)
Change in operating assets and liabilities:
Accounts receivable	3,637	10,960
Prepaid expenses and other current assets	234	(260)
Deferred commissions	(3,063)	(2,987)
Other long-term assets	(170)	32
Accounts payable	219	(268)
Accrued liabilities	(2,779)	3,324
Operating lease liabilities	(1,126)	(195)
Deferred revenue	3,349	6,267
Other liabilities, non-current	451	0
Net cash provided by (used in) operating activities	(5,878)	3,214
Cash flows from investing activities
Purchases of property and equipment	(1,505)	(389)
Proceeds from maturities of marketable securities	165,000	140,000
Purchases of marketable securities	(160,283)	(139,024)
Net cash provided by investing activities	3,212	587
Cash flows from financing activities
Payments of issuance costs for convertible senior notes	(4,154)	0
Proceeds from exercise of stock options, including early exercised stock options	3,000	6,437
Repurchase of early exercised stock options	(1)	(30)
Principal repayments of finance leases	(1,135)	0
Net cash provided by (used in) financing activities	(2,290)	6,407
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(593)	19
Net increase (decrease) in cash, cash equivalents and restricted cash	(5,549)	10,227
Cash, cash equivalents and restricted cash, beginning of period	706,706	148,347
Cash, cash equivalents and restricted cash, end of period	701,157	158,574
Cash paid during the period for:
Income taxes, net of refunds	553	735
Interest expense	884	0
Reconciliation of cash, cash equivalents and restricted cash within the condensed consolidated balance sheets, end of period, to the amounts shown in the statements of cash flows above
Total cash, cash equivalents and restricted cash	$ 701,157	$ 158,574

Organization and Description of Business	3 Months Ended
Organization and Description of Business	Apr. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Description of Business	Organization and Description of Business MongoDB, Inc. (“MongoDB” or the “Company”) was originally incorporated in the state of Delaware in November 2007 under the name 10Gen, Inc. In August 2013, the Company changed its name to MongoDB, Inc. The Company is headquartered in New York City. MongoDB is the leading, modern, general purpose database platform. The Company’s robust platform enables developers to build and modernize applications rapidly and cost-effectively across a broad range of use cases. Organizations can deploy the Company’s platform at scale in the cloud, on-premise or in a hybrid environment. In addition to selling its software, the Company provides post-contract support, training and consulting services for its offerings. The Company’s fiscal year ends January 31.

Summary of Significant Accounting Policies	3 Months Ended
Summary of Significant Accounting Policies	Apr. 30, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The accompanying interim condensed consolidated balance sheet as of April 30, 2020, the interim condensed consolidated statements of stockholders’ equity for the three months ended April 30, 2020 and 2019, the interim condensed consolidated statements of operations and of comprehensive loss for the three months ended April 30, 2020 and 2019 and the interim condensed consolidated statements of cash flows for the three months ended April 30, 2020 and 2019 are unaudited. The interim unaudited condensed consolidated financial statements have been prepared on a basis consistent with the annual consolidated financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary to state fairly the Company’s financial position as of April 30, 2020, its statements of stockholders’ equity as of April 30, 2020 and 2019, its results of operations and of comprehensive loss for the three months ended April 30, 2020 and 2019 and its statements of cash flows for the three months ended April 30, 2020 and 2019. The financial data and the other financial information disclosed in the notes to these interim condensed consolidated financial statements related to the three-month periods are also unaudited. The results of operations for the three months ended April 30, 2020 are not necessarily indicative of the results to be expected for the fiscal year ending January 31, 2021 or for any other future year or interim period. The interim unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and include the accounts of the Company and its wholly owned subsidiaries. All intercompany transactions and accounts have been eliminated. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to the applicable rules and regulations of the Securities and Exchange Commission. The condensed balance sheet data as of January 31, 2020 was derived from the Company’s audited financial statements, but does not include all disclosures required by U.S. GAAP. Therefore, these interim unaudited condensed consolidated financial statements and accompanying footnotes should be read in conjunction with the Company’s annual consolidated financial statements and related footnotes included in its Annual Report on Form 10-K for the fiscal year ended January 31, 2020 (the “2020 Form 10-K”). Use of Estimates The preparation of the interim unaudited condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates, assumptions and judgments that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Such estimates include, but are not limited to, revenue recognition, allowances for doubtful accounts, the incremental borrowing rate related to the Company’s lease liabilities, stock-based compensation, fair value of the liability component of the convertible debt, fair value of common stock and redeemable convertible preferred stock warrants prior to the initial public offering, legal contingencies, fair value of acquired intangible assets and goodwill, useful lives of acquired intangible assets and property and equipment and accounting for income taxes. The Company bases these estimates on historical and anticipated results, trends and various other assumptions that it believes are reasonable under the circumstances, including assumptions as to future events. The COVID-19 pandemic has resulted in a global slowdown of economic activity that is likely to continue to decrease demand for a broad variety of goods and services, including from the Company’s customers, while also disrupting sales channels and marketing activities for an unknown period of time. The Company currently expects its revenue to be negatively impacted by the slowdown in activity associated with the COVID-19 pandemic in the near-term and, at least, for the year ending January 31, 2021. Estimates and assumptions about future events and their effects cannot be determined with certainty and therefore require the exercise of judgment. As of the date of issuance of these financial statements, the Company is not aware of any specific event or circumstance that would require the Company to update its estimates, assumptions and judgments or adjust the carrying value of its assets or liabilities. These estimates may change as new events occur and additional information is obtained and are recognized in the consolidated financial statements as soon as they become known. Actual results could differ from those estimates and any such differences may be material to the Company’s financial statements. Significant Accounting Policies There have been no changes to the Company’s significant accounting policies as described in the Company’s 2020 Form 10-K other than as a result of the adoption of the new accounting guidance related to current expected credit losses, effective February 1, 2020, as discussed in “Recently Adopted Accounting Pronouncements” below. Further disclosures with respect to the Company’s credit losses are also included in Note 3, Fair Value Measurements and Note 8, Revenue. Related Party Transactions All contracts with related parties are executed in ordinary course of business. There were no material related party transactions in the three months ended April 30, 2020 and 2019. As of April 30, 2020 and January 31, 2020, there were no material amounts payable to or amounts receivable from related parties. Recently Adopted Accounting Pronouncements Goodwill Impairment. In January 2017, the FASB issued ASU 2017-04—Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The new standard simplifies the measurement of goodwill by eliminating step two of the two-step impairment test. Step two measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. The new guidance requires an entity to compare the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. Additionally, an entity should consider income tax effects from any tax-deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. The new guidance, effective February 1, 2020, did not have an impact on the Company’s condensed consolidated financial statements. Cloud Computing. In August 2018, the FASB issued ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, which aligns the accounting for implementation costs incurred in a hosting arrangement that is a service contract with the accounting for implementation costs incurred to develop or obtain internal-use software under ASC 350-40, in order to determine which costs to capitalize and recognize as an asset and which costs to expense. The Company adopted ASU 2018-15, effective February 1, 2020, prospectively for implementation costs incurred after the date of adoption. ASU 2018-15 did not have an impact on the Company’s condensed consolidated financial statements upon adoption. Credit Losses. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which requires the measurement and recognition of expected credit losses for financial assets held at amortized cost, which includes the Company's accounts receivable, including unbilled receivables, as well as certain financial instruments. ASU 2016-13 replaces the existing incurred loss impairment model with an expected loss methodology, which will result in more timely recognition of credit losses. ASU 2016-13 eliminates the concept of other-than-temporary impairment and requires credit losses related to available-for-sale debt securities to be recorded through an allowance for credit losses rather than as a reduction in the amortized cost basis of the securities. Effective February 1, 2020, the Company adopted ASU 2016-13 using the modified retrospective transition approach, which requires a cumulative effect adjustment to the balance sheet as of February 1, 2020. As a result of the adoption, the Company recorded a cumulative effect adjustment to increase the accumulated deficit by $0.2 million, which represented the accelerated recognition of credit losses under the expected credit loss model of calculating current expected credit losses compared to the previous incurred loss impairment model. The following two significant accounting policies have changed from the Company’s 2020 Form 10-K as a result of the adoption of ASU 2016-13. Accounts Receivable and Allowance for Doubtful Accounts The Company records a receivable when an unconditional right to consideration exists, such that only the passage of time is required before payment of consideration is due. Timing of revenue recognition may differ from the timing of invoicing to customers. If revenue recognized on a contract exceeds the billings, then the Company records an unbilled receivable for that excess amount, which is included as part of accounts receivable, net in the Company’s condensed consolidated balance sheets. The Company is exposed to credit losses primarily through the sales of subscriptions and services, which are recorded as accounts receivable, inclusive of unbilled receivables. The Company performs initial and ongoing evaluations of its customers' financial position and generally extends credit without collateral. Accounts receivable are recorded at amortized cost, net of an allowance for doubtful accounts, and do not bear interest. The allowance for doubtful accounts represents the best estimate of lifetime expected credit losses against the existing accounts receivable, inclusive of unbilled receivables, based on certain factors including past collection experience, credit quality of the customer, current aging of the receivable balance, current economic conditions, reasonable and supportable forecasts, as well as specific circumstances arising with individual customers. Extensive judgment is required in assessing these factors. Due to the short-term nature of the Company’s accounts receivable, forecasts have limited relevance to the Company’s expected credit loss estimates. Accounts receivable are written off against the allowance when management determines a balance is uncollectible and the Company no longer actively pursues collection of the receivable. The Company’s estimates of the allowance for credit losses may not be indicative of our actual credit losses requiring additional charges to be incurred to reflect the actual amount collected. Marketable Securities The Company’s short-term investments consist of U.S. government treasury securities. The Company determines the appropriate classification of its short-term investments at the time of purchase and reevaluates such designation at each balance sheet date. The Company has classified and accounted for its short-term investments as available-for-sale debt securities as the Company may sell these securities at any time for use in its current operations or for other purposes, even prior to maturity. As a result, the Company classifies its short-term investments within current assets on the condensed consolidated balance sheets. Available-for-sale debt securities are recorded at fair value each reporting period. Realized gains and losses are determined based on the individual security level and are reported in other income (expense), net in the condensed consolidated statements of operations. Unrealized gains on these short-term investments are reported as a separate component of accumulated other comprehensive income (loss) on the condensed consolidated balance sheets until realized. If the estimated fair value of an available-for-sale debt security is below its amortized cost basis, then the Company evaluates for impairment. The Company considers its intent to sell the security or whether it is more likely than not that it will be required to sell the security before recovery of its amortized basis. If either of these criteria are met, the debt security’s amortized cost basis is written down to fair value through other income (expense), net in the condensed consolidated statements of operations. If neither of these criteria are met, the Company evaluates whether unrealized losses have resulted from a credit loss or other factors. The factors considered in determining whether a credit loss exists can include the extent to which fair value is less than the amortized cost basis, changes to the rating of the security by a rating agency, any adverse conditions specifically related to the security, as well as other factors. An impairment relating to credit losses is recorded through an allowance for credit losses reported in other income (expense), net in the condensed consolidated statements of operations. The allowance is limited by the amount that the fair value of the debt security is below its amortized cost basis. When a credit loss exists, the Company compares the present value of cash flows expected to be collected from the debt security with the amortized cost basis of the security to determine what allowance amount, if any, should be recorded. Unrealized losses not resulting from credit losses are recorded through accumulated other comprehensive income (loss) on the condensed consolidated balance sheets. New Accounting Pronouncements Not Yet Adopted Income Taxes. In December 2019, the FASB issued ASU 2019-12—Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The amendments in ASU 2019-12 simplify the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application and simplification of GAAP for other areas of Topic 740 by clarifying and amending existing guidance. ASU 2019-12 is effective for the Company beginning February 1, 2021, although early adoption of the amendments is permitted. The Company is currently evaluating the impact of ASU 2019-12 on its consolidated financial statements.

Fair Value Measurements

3 Months Ended

Apr. 30, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements

The following tables present information about the Company’s financial assets and liabilities that have been measured at fair value on a recurring basis as of April 30, 2020 and January 31, 2020 and indicate the fair value hierarchy of the valuation inputs utilized to determine such fair value (in thousands):



	Fair Value Measurement at April 30, 2020
	Level 1		Level 2		Level 3		Total
Financial Assets:
Cash and cash equivalents:
Money market funds	$	631,466	$	—	$	—	$	631,466
Short-term investments:
U.S. government treasury securities	276,372		—		—		276,372
Total financial assets	$	907,838	$	—	$	—	$	907,838



	Fair Value Measurement at January 31, 2020
	Level 1		Level 2		Level 3		Total
Financial Assets:
Cash and cash equivalents:
Money market funds	$	623,856	$	—	$	—	$	623,856
Short-term investments:
U.S. government treasury securities	280,326		—		—		280,326
Total financial assets	$	904,182	$	—	$	—	$	904,182

The Company utilized the market approach and Level 1 valuation inputs to value its money market mutual funds and U.S. government treasury securities because published net asset values were readily available. As of April 30, 2020, unrealized gains on our U.S. government treasury securities were approximately $1.0 million, net of tax, related to securities that the Company purchased as early as July 11, 2019. The decline in market interest rates as of April 30, 2020 has resulted in unrealized gains on those securities the Company previously purchased. Accordingly, the Company concluded that an allowance for credit losses was unnecessary for short-term investments as of April 30, 2020. All other unrealized gains and losses, as well as gross realized gains and losses for cash equivalents and short-term investments, as of April 30, 2020 and January 31, 2020 were not material and the contractual maturity of all marketable securities was less than one year as of April 30, 2020 and January 31, 2020.

In addition to its cash, cash equivalents and short-term investments, the Company measures the fair value of its outstanding convertible senior notes on a quarterly basis for disclosure purposes. The Company considers the fair value of its convertible senior notes at April 30, 2020 to be a Level 2 measurement due to limited trading activity of the convertible senior notes. Refer to Note 5, Convertible Senior Notes, for further details.

- 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

Goodwill and Acquired Intangible Assets, Net

3 Months Ended

Apr. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Acquired Intangible Assets, Net

As of April 30, 2020, there have been no changes to the carrying amount of goodwill from the balance presented as of January 31, 2020. The gross carrying amount and accumulated amortization of the Company’s intangible assets are as follows (in thousands):



	April 30, 2020
	Gross Carrying Value		Accumulated Amortization			Net Book Value
Developed technology	$	34,700	$	(12,860	)	$	21,840
Domain name	155		(155		)	—
Customer relationships	15,200		(4,390		)	10,810
Total	$	50,055	$	(17,405	)	$	32,650



	January 31, 2020
	Gross Carrying Value		Accumulated Amortization			Net Book Value
Developed technology	$	34,700	$	(11,495	)	$	23,205
Domain name	155		(151		)	4
Customer relationships	15,200		(3,630		)	11,570
Total	$	50,055	$	(15,276	)	$	34,779

Acquired intangible assets are amortized on a straight-line basis. As of April 30, 2020, the weighted-average remaining useful lives of identifiable, acquisition-related intangible assets was 4.0 years for developed technology and 3.6 years for customer relationships. Amortization expense of intangible assets was $2.1 million for the three months ended April 30, 2020. Amortization expense for developed technology and the domain name was included as research and development expense in the Company’s condensed consolidated statements of operations. Amortization expense for customer relationships was included as sales and marketing expense in the Company’s condensed consolidated statements of operations.

As of April 30, 2020, future amortization expense related to the intangible assets is as follows (in thousands):



Years Ending January 31,
Remainder of 2021	$	6,375
2022	8,500
2023	8,500
2024	7,825
2025	1,450
2026	—
Total	$	32,650

Convertible Senior Notes

3 Months Ended

Apr. 30, 2020

Debt Disclosure [Abstract]

Convertible Senior Notes

In June 2018, the Company issued $250.0 million aggregate principal amount of 0.75% convertible senior notes due 2024 in a private placement and, in July 2018, the Company issued an additional $50.0 million aggregate principal amount of convertible senior notes pursuant to the exercise in full of the initial purchasers’ option to purchase additional convertible senior notes (collectively, the “2024 Notes”). The 2024 Notes are senior unsecured obligations of the Company and interest is payable semiannually in arrears on June 15 and December 15 of each year, beginning on December 15, 2018, at a rate of 0.75% per year. The 2024 Notes will mature on June 15, 2024, unless earlier converted, redeemed or repurchased. The total net proceeds from the offering, after deducting initial purchase discounts and debt issuance costs, were approximately $291.1 million.

In January 2020, the Company issued $1.0 billion aggregate principal amount of 0.25% convertible senior notes due 2026 in a private placement and, also in January 2020, the Company issued an additional $150.0 million aggregate principal amount of convertible senior notes pursuant to the exercise in full of the initial purchasers’ option to purchase additional

convertible senior notes (collectively, the “2026 Notes”). The 2026 Notes are senior unsecured obligations of the Company and interest is payable semiannually in arrears on July 15 and January 15 of each year, beginning on July 15, 2020, at a rate of 0.25% per year. The 2026 Notes will mature on January 15, 2026, unless earlier converted, redeemed or repurchased. The total net proceeds from the offering, after deducting initial purchase discounts and estimated debt issuance costs, were approximately $1.13 billion.

On January 14, 2020, in connection with the issuance of the 2026 Notes, the Company used a portion of the net proceeds to repurchase $210.0 million aggregate principal amount of the 2024 Notes (the “2024 Notes Partial Repurchase”) leaving $90.0 million aggregate principal outstanding on the 2024 Notes immediately after the exchange. The 2024 Notes Partial Repurchase were not pursuant to a redemption notice and were individually privately negotiated transactions. The 2024 Notes Partial Repurchase and issuance of the 2026 Notes were deemed to have substantially different terms due to the significant difference between the value of the conversion option immediately prior to and after the exchange, and accordingly, the 2024 Notes Partial Repurchase was accounted for as a debt extinguishment. The Company used $479.2 million of the net proceeds from the issuance of the 2026 Notes to complete the 2024 Notes Partial Repurchase, of which $175.1 million and $303.9 million were allocated to the liability and equity components of the 2024 Notes, respectively, and $0.2 million was allocated to the proportional interest paid.

Refer to Note 7, Convertible Senior Notes, in the Notes to Consolidated Financial Statements included in Part II, Item 8 of the Company’s 2020 Form 10-K for further information on the 2024 Notes, the 2026 Notes and the 2024 Notes Partial Repurchase.

During the three months ended April 30, 2020, the conditional conversion feature of the 2024 Notes was triggered as the last reported sale price of the Company's Class A common stock was more than or equal to 130% of the conversion price for at least 20 trading days in the period of 30 consecutive trading days ending on April 30, 2020 (the last trading day of the fiscal quarter) and therefore the 2024 Notes are currently convertible, in whole or in part, at the option of the holders between May 1, 2020 through July 31, 2020. Whether the 2024 Notes will be convertible following such period will depend on the continued satisfaction of this condition or another conversion condition in the future. During the three months ended April 30, 2020, the Company converted an immaterial amount of their 2024 Notes to a certain holder, unrelated to the 2024 Notes Partial Repurchase. Since the Company has the election of repaying the 2024 Notes in cash, shares of the Company’s Class A common stock, or a combination of both, the Company continued to classify the liability component of the 2024 Notes as long-term debt on the Company’s consolidated balance sheet as of April 30, 2020.

During the three months ended April 30, 2020, the conditions allowing holders of the 2026 Notes to convert have not been met. The 2026 Notes were therefore not convertible during the three months ended April 30, 2020 and the liability component was classified as long-term debt on the Company’s condensed consolidated balance sheet as of April 30, 2020.

The net carrying amounts of the liability component of the 2024 Notes and 2026 Notes were as follows (in thousands):



	April 30, 2020
	2024 Notes			2026 Notes
Principal	$	90,001		$	1,150,000
Unamortized debt discount	(18,465		)	(282,386		)
Unamortized debt issuance costs	(1,475		)	(14,577		)
Net carrying amount	$	70,061		$	853,037

As of April 30, 2020, the total estimated fair values (Level 2) of the outstanding 2024 Notes and the 2026 Notes were approximately $193.5 million and $1.20 billion, respectively. The fair values were determined based on the closing trading price per $100 of the 2024 Notes and 2026 Notes as of the last day of trading for the period. The fair values of the 2024 Notes and 2026 Notes are primarily affected by the trading price of the Company’s common stock and market interest rates.

The following table sets forth the interest expense related to the 2024 Notes and 2026 Notes (in thousands):



	Three Months Ended April 30, 2020				Three Months Ended April 30, 2019
	2024 Notes		2026 Notes		2024 Notes		2026 Notes
Contractual interest expense	$	169	$	719	$	563	$	—
Amortization of debt discount	970		10,547		3,033		—
Amortization of issuance costs	65		441		188		—
Total	$	1,204	$	11,707	$	3,784	$	—

Capped Calls

In connection with the pricing of the 2024 Notes and 2026 Notes, the Company entered into privately negotiated capped call transactions with certain counterparties (the “Capped Calls”). The Capped Calls associated with the 2024 Notes each have an initial strike price of approximately $68.15 per share, subject to certain adjustments, which corresponds to the initial conversion price of the 2024 Notes. These Capped Calls have initial cap prices of $106.90 per share, subject to certain adjustments.

The Capped Calls associated with the 2026 Notes each have an initial strike price of approximately $211.20 per share, subject to certain adjustments, which corresponds to the initial conversion price of the 2026 Notes. These Capped Calls have initial cap prices of $296.42 per share, subject to certain adjustments.

Refer to Note 7, Convertible Senior Notes, in the Notes to Consolidated Financial Statements included in Part II, Item 8 of the Company’s 2020 Form 10-K for further information on the Capped Calls.

Leases

3 Months Ended

Apr. 30, 2020

Leases [Abstract]

Leases

Finance Lease

In December 2017, the Company entered into a lease agreement for 106,230 rentable square feet of office space (the “Premises”) to accommodate its growing employee base in New York City. The Company received delivery of the Premises on January 1, 2018 to commence construction to renovate the Premises. Total estimated aggregate base rent payments over the initial 12-year term of the lease are $87.3 million and payments began in July 2019. The Company has the option to extend the term of the lease by an additional 5 years.

Operating Leases

The Company has entered into non-cancelable operating leases, primarily related to rental of office space expiring through 2032. The Company recognizes operating lease costs on a straight-line basis over the term of the agreement, taking into account adjustments for market provisions such as free or escalating base monthly rental payments or deferred payment terms such as rent holidays that defer the commencement date of the required payments. The Company may receive renewal or expansion options, leasehold improvement allowances or other incentives on certain lease agreements.

In December 2019, the Company entered into a new agreement to lease approximately 40,000 square feet of office space in Dublin, Ireland, which commenced during the three months ended April 30, 2020 for a term of 12 years with two five-year renewal options. This agreement was determined to be an operating lease with total estimated aggregate base rent payments, excluding the renewal options, of approximately $27.0 million.

Lease Costs

The components of the Company’s lease costs included in its condensed consolidated statement of operations were as follows (in thousands):



	Three Months Ended April 30, 2020		Three Months Ended April 30, 2019
Finance lease cost:
Amortization of right-of-use assets	$	994	$	994
Interest on lease liabilities	884		905
Operating lease cost	1,823		967
Short-term lease cost	793		395
Total lease cost	$	4,494	$	3,261

Balance Sheet Components

The balances of the Company’s finance and operating leases were recorded on the condensed consolidated balance sheet as follows (in thousands):



	April 30, 2020		January 31, 2020
Finance Lease:
Property and equipment, net	$	38,418	$	39,411
Other accrued liabilities	4,698		4,633
Other liabilities, non-current	58,057		59,257
Operating Leases:
Operating lease right-of-use assets	$	32,965	$	11,147
Operating lease liabilities (current)	4,005		3,750
Operating lease liabilities, non-current	29,625		8,113

Supplemental Information

The following table presents supplemental information related to the Company’s finance and operating leases (in thousands, except weighted-average information):



	Three Months Ended April 30, 2020			Three Months Ended April 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance lease	$	884		$	—
Operating cash flows from operating leases	1,297			1,032
Financing cash flows from finance lease	1,135			—
Right-of-use assets obtained in exchange for lease obligations:
Finance lease	$	—		$	—
Operating leases	23,375			2,269
Weighted-average remaining lease term (in years):
Finance lease	9.7			10.7
Operating leases	8.7			4.8
Weighted-average discount rate:
Finance lease	5.6		%	5.6		%
Operating leases	5.0		%	6.1		%

Maturities of Lease Liabilities

Future minimum lease payments under non-cancelable finance and operating leases on an annual undiscounted cash flow basis as of April 30, 2020 were as follows (in thousands):



Year Ending January 31,	Finance Lease			Operating Leases
Remainder of 2021	$	6,055		$	3,625
2022	8,073			5,524
2023	8,073			5,557
2024	8,073			4,512
2025	8,445			4,125
Thereafter	42,829			18,180
Total minimum payments	81,548			41,523
Less imputed interest	(18,793		)	(7,893		)
Present value of future minimum lease payments	62,755			33,630
Less current obligations under leases	(4,698		)	(4,005		)
Non-current lease obligations	$	58,057		$	29,625

Excluded in the lease obligation table above is a new agreement to lease an additional 21,000 square feet of office space in New York City, which will be recognized as an operating lease upon the lease commencement date. The Company entered into this agreement in October 2019, but the lease has not yet commenced. The term of this new lease is five years with no renewal period. The total estimated aggregate base rent payments are $8.4 million with payments beginning four months subsequent to the commencement date. Also excluded in the lease obligation table above is a new agreement to lease approximately 16,000 square feet of office space in Palo Alto, which will be recognized as an operating lease upon the lease commencement date. The lease term is eight years with one option to extend for an additional five years. The total estimated aggregate base rent payments are $14.2 million with payments beginning four months subsequent to the commencement date. For both the New York City and Palo Alto leases, the lease commencement dates are uncertain given the impacts of the COVID-19 pandemic and associated construction and occupancy restrictions.

Leases

Finance Lease

Operating Leases

Lease Costs

The components of the Company’s lease costs included in its condensed consolidated statement of operations were as follows (in thousands):



	Three Months Ended April 30, 2020		Three Months Ended April 30, 2019
Finance lease cost:
Amortization of right-of-use assets	$	994	$	994
Interest on lease liabilities	884		905
Operating lease cost	1,823		967
Short-term lease cost	793		395
Total lease cost	$	4,494	$	3,261

Balance Sheet Components

The balances of the Company’s finance and operating leases were recorded on the condensed consolidated balance sheet as follows (in thousands):



	April 30, 2020		January 31, 2020
Finance Lease:
Property and equipment, net	$	38,418	$	39,411
Other accrued liabilities	4,698		4,633
Other liabilities, non-current	58,057		59,257
Operating Leases:
Operating lease right-of-use assets	$	32,965	$	11,147
Operating lease liabilities (current)	4,005		3,750
Operating lease liabilities, non-current	29,625		8,113

Supplemental Information

The following table presents supplemental information related to the Company’s finance and operating leases (in thousands, except weighted-average information):



	Three Months Ended April 30, 2020			Three Months Ended April 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance lease	$	884		$	—
Operating cash flows from operating leases	1,297			1,032
Financing cash flows from finance lease	1,135			—
Right-of-use assets obtained in exchange for lease obligations:
Finance lease	$	—		$	—
Operating leases	23,375			2,269
Weighted-average remaining lease term (in years):
Finance lease	9.7			10.7
Operating leases	8.7			4.8
Weighted-average discount rate:
Finance lease	5.6		%	5.6		%
Operating leases	5.0		%	6.1		%

Maturities of Lease Liabilities

Future minimum lease payments under non-cancelable finance and operating leases on an annual undiscounted cash flow basis as of April 30, 2020 were as follows (in thousands):



Year Ending January 31,	Finance Lease			Operating Leases
Remainder of 2021	$	6,055		$	3,625
2022	8,073			5,524
2023	8,073			5,557
2024	8,073			4,512
2025	8,445			4,125
Thereafter	42,829			18,180
Total minimum payments	81,548			41,523
Less imputed interest	(18,793		)	(7,893		)
Present value of future minimum lease payments	62,755			33,630
Less current obligations under leases	(4,698		)	(4,005		)
Non-current lease obligations	$	58,057		$	29,625

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Apr. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Non-cancelable Material Commitments During the three months ended April 30, 2020, other than certain non-cancelable operating leases described in Note 6, Leases, there have been no material changes outside the ordinary course of business to the Company’s contractual obligations and commitments from those disclosed in the 2020 Form 10-K. Legal Matters From time to time, the Company has become involved in claims, litigation and other legal matters arising in the ordinary course of business, including intellectual property claims, labor and employment claims and breach of contract claims. For example, on March 12, 2019, Realtime Data (“Realtime”) filed a lawsuit against the Company in the United States District Court for the District of Delaware alleging that the Company is infringing three U.S. patents that it holds: U.S. Patent No. 9,116,908, U.S. Patent No. 9,667,751 and U.S. Patent No. 8,933,825. The patent infringement allegations in the lawsuit relate to data compression, decompression, storage and retrieval. Realtime seeks monetary damages and injunctive relief. In August 2019, the District Court approved the Company and Realtime’s stipulation to stay Realtime’s lawsuit against the Company pending the outcome of Realtime's appeal of the District Court's decision to invalidate two of the asserted patents in a separate action. The Company investigates all claims, litigation and other legal matters as they arise. Although claims and litigation are inherently unpredictable, the Company is currently not aware of any matters that, if determined adversely to the Company, would individually or taken together have a material adverse effect on its business, financial position, results of operations or cash flows. The Company accrues estimates for resolution of legal and other contingencies when losses are probable and estimable. Although the results of claims and litigation are inherently unpredictable, the Company believes that there was less than a reasonable possibility that the Company had incurred a material loss with respect to such loss contingencies, as of April 30, 2020 and January 31, 2020, therefore, the Company has not recorded an accrual for such contingencies. Indemnification The Company enters into indemnification provisions under its agreements with other companies in the ordinary course of business, including business partners, landlords, contractors and parties performing its research and development. Pursuant to these arrangements, the Company agrees to indemnify, hold harmless and reimburse the indemnified party for certain losses suffered or incurred by the indemnified party as a result of the Company’s activities. The terms of these indemnification agreements are generally perpetual. The maximum potential amount of future payments the Company could be required to make under these agreements is not determinable. The Company has never incurred costs to defend lawsuits or settle claims related to these indemnification agreements. As a result, the Company believes the fair value of these agreements is not material. The Company maintains commercial general liability insurance and product liability insurance to offset certain of the Company’s potential liabilities under these indemnification provisions. The Company has entered into indemnification agreements with each of its directors and executive officers. These agreements require the Company to indemnify such individuals, to the fullest extent permitted by Delaware law, for certain liabilities to which they may become subject as a result of their affiliation with the Company.

Revenue

3 Months Ended

Apr. 30, 2020

Revenues [Abstract]

Revenue

Revenue Recognition

Disaggregation of Revenue

Based on the information provided to and reviewed by the Company’s Chief Executive Officer, the Company believes that the nature, amount, timing and uncertainty of its revenue and cash flows and how they are affected by economic factors is most appropriately depicted through the Company’s primary geographical markets and subscription product categories. The Company’s primary geographical markets are North and South America (“Americas”); Europe, Middle East and Africa (“EMEA”); and Asia Pacific. The Company also disaggregates its subscription products between its MongoDB Atlas-related offerings, which includes mLab, and other subscription products, which includes MongoDB Enterprise Advanced.

The following table presents the Company’s revenues disaggregated by primary geographical markets, subscription product categories and services (in thousands):



	Three Months Ended April 30,
	2020		2019
Primary geographical markets:
Americas	$	81,538	$	57,756
EMEA	39,009		25,320
Asia Pacific	9,782		6,312
Total	$	130,329	$	89,388

Subscription product categories and services:
MongoDB Atlas-related	$	54,170	$	30,863
Other subscription	70,686		53,131
Services	5,473		5,394
Total	$	130,329	$	89,388

Customers located in the United States accounted for 58% and 60% of total revenue for the three months ended April 30, 2020 and 2019, respectively. Customers located in the United Kingdom accounted for 9% and 10% of total revenue for the three months ended April 30, 2020 and 2019, respectively. No other country accounted for 10% or more of revenue for the periods presented.

Contract Liabilities

The Company’s contract liabilities are recorded as deferred revenue in the Company’s condensed consolidated balance sheet and consists of customer invoices issued or payments received in advance of revenues being recognized from the Company’s subscription and services contracts. Deferred revenue, including current and non-current balances, as of April 30, 2020 and January 31, 2020 was $193.0 million and $190.8 million, respectively. Approximately 52% and 50% of the total revenue recognized for the three months ended April 30, 2020 and 2019, respectively, was from deferred revenue at the beginning of each respective period.

Remaining Performance Obligations

Remaining performance obligations represent the aggregate amount of the transaction price in contracts allocated to performance obligations not delivered, or partially undelivered, as of the end of the reporting period. Remaining performance obligations include unearned revenue, multi-year contracts with future installment payments and certain unfulfilled orders against accepted customer contracts at the end of any given period. As of April 30, 2020, the aggregate transaction price allocated to remaining performance obligations was $209.7 million. Approximately 54% is expected to be recognized as revenue over the next 12 months and the remainder thereafter. The Company applies the practical expedient to omit disclosure with respect to the amount of the transaction price allocated to remaining performance obligations if the related contract has a total duration of 12 months or less.

Unbilled Receivables

Revenue recognized in excess of invoiced amounts creates an unbilled receivable, which represents the Company’s unconditional right to consideration in exchange for goods or services that the Company has transferred to the customer. Unbilled receivables were recorded as part of accounts receivable, net in the Company’s condensed consolidated balance sheets. As of April 30, 2020, unbilled receivables were $5.9 million.

Allowance for Doubtful Accounts

The adoption of ASU 2016-13 on February 1, 2020 required the Company to shift from an incurred loss impairment model to an expected credit loss model. Accordingly, the Company is required to consider expectations of forward-looking losses, in addition to historical loss rates, to estimate its allowance for doubtful accounts on its account receivables. The following is a summary of the changes in the Company’s allowance for doubtful accounts (in thousands):



	Allowance for Doubtful Accounts
Balance at January 31, 2020	$	2,515
Adoption of new accounting standard	50
Provision	2,075
Recoveries/write-offs	(313		)
Balance at April 30, 2020	$	4,327

The Company is closely monitoring the potential impact from the COVID-19 pandemic and associated global economic uncertainty on its business. A higher allowance was recorded during the three months ended April 30, 2020 due to the potential adverse impact the COVID-19 pandemic may have on factors that affect the Company’s estimate of current expected credit losses, including possible financial difficulties faced by a portion of the Company’s customers.

Costs Capitalized to Obtain Contracts with Customers

Deferred commissions were $80.0 million as of April 30, 2020. Amortization expense with respect to deferred commissions was $6.5 million and $4.4 million for the three months ended April 30, 2020 and 2019, respectively. There was no impairment loss in relation to the costs capitalized for the periods presented.

Equity Incentive Plans and Employee Stock Purchase Plan

3 Months Ended

Apr. 30, 2020

Share-based Payment Arrangement [Abstract]

Equity Incentive Plans and Employee Stock Purchase Plan

2008 Stock Incentive Plan and 2016 Equity Incentive Plan

The Company adopted the 2008 Stock Incentive Plan (as amended, the “2008 Plan”) in 2008 and the 2016 Equity Incentive Plan (as amended, the “2016 Plan”) in 2016, primarily for the purpose of granting stock-based awards to

employees, directors and consultants, including stock options, restricted stock units (“RSUs”) and other stock-based awards. With the establishment of the 2016 Plan in December 2016, all shares available for grant under the 2008 Plan were transferred to the 2016 Plan. The Company no longer grants any stock-based awards under the 2008 Plan and any shares underlying stock options canceled under the 2008 Plan will be automatically transferred to the 2016 Plan.

Stock Options

The 2016 Plan provides for the issuance of incentive stock options to employees and nonstatutory stock options to employees, directors or consultants. The Company’s Board of Directors or a committee thereof determines the vesting schedule for all equity awards. Stock option awards generally vest over a period of four years with 25% vesting on the one-year anniversary of the award and the remainder vesting monthly over the next 36 months of the grantee’s service to the Company.

The following table summarizes stock option activity for the three months ended April 30, 2020 (in thousands, except share and per share data and years):



	Shares		Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (In Years)	Aggregate Intrinsic Value
Balance - January 31, 2020	6,178,999		$	7.60	5.7	$	965,860
Stock options exercised	(373,394	)	8.03
Stock options forfeited and expired	(16,389	)	10.06
Balance - April 30, 2020	5,789,216		$	7.56	5.5	$	894,828
Vested and exercisable - January 31, 2020	4,693,273		$	7.08	5.4	$	736,034
Vested and exercisable - April 30, 2020	4,635,511		$	7.11	5.2	$	718,616

Restricted Stock Units

The 2016 Plan provides for the issuance of RSUs to employees, directors and consultants. RSUs granted to new employees generally vest over a period of four years with 25% vesting on the one-year anniversary of the vesting start date and the remainder vesting quarterly over the next 12 quarters, subject to the grantee’s continued service to the Company. RSUs granted to existing employees generally vest quarterly over a period of four years, subject to the grantee’s continued service to the Company.

The following table summarizes RSU activity for the three months ended April 30, 2020:



	Shares		Weighted-Average Grant Date Fair Value per RSU
Unvested - January 31, 2020	3,281,431		$	102.30
RSUs granted	1,077,847		148.52
RSUs vested	(241,569	)	86.41
RSUs forfeited and canceled	(87,213	)	103.95
Unvested - April 30, 2020	4,030,496		$	115.58

2017 Employee Stock Purchase Plan

In October 2017, the Company’s Board of Directors adopted, and stockholders approved, the 2017 Employee Stock Purchase Plan (the “2017 ESPP”). Subject to any plan limitations, the 2017 ESPP allows eligible employees to contribute, normally through payroll deductions, up to 15% of their earnings for the purchase of the Company’s Class A common stock at a discounted price per share. The Company’s current offering period began December 16, 2019 and is expected to end June 15, 2020.

Stock-Based Compensation Expense

Total stock-based compensation expense recognized in the Company’s unaudited condensed consolidated statements of operations is as follows (in thousands):



	Three Months Ended April 30,
	2020		2019
Cost of revenue—subscription	$	1,827	$	988
Cost of revenue—services	1,146		593
Sales and marketing	10,823		4,940
Research and development	11,759		4,520
General and administrative	5,012		2,968
Total stock-based compensation expense	$	30,567	$	14,009

Net Loss Per Share

3 Months Ended

Apr. 30, 2020

Earnings Per Share [Abstract]

Net Loss Per Share

The Company calculates basic net loss per share by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period, less shares subject to repurchase. Diluted net loss per share is computed by giving effect to all potentially dilutive common stock equivalents outstanding for the period, including stock options and restricted stock units. Basic and diluted net loss per share was the same for each period presented, as the inclusion of all potential common shares outstanding would have been anti-dilutive due to the net loss reported for each period presented.

The rights, including the liquidation and dividend rights, of the holders of Class A and Class B common stock are identical, except with respect to voting. Each share of Class A common stock is entitled to one vote per share and each share of Class B common stock is entitled to 10 votes per share. As the liquidation and dividend rights are identical for Class A and Class B common stock, the undistributed earnings are allocated on a proportionate basis and the resulting net loss per share will, therefore, be the same for both Class A and Class B common stock on an individual or combined basis.

The following table sets forth the computation of basic and diluted net loss per share (in thousands, except share and per share data):



	Three Months Ended April 30,
	2020			2019
Numerator:
Net loss	$	(53,967	)	$	(33,240	)

Denominator:
Weighted-average shares used to compute net loss per share, basic and diluted	57,649,524			54,710,746

Net loss per share, basic and diluted	$	(0.94	)	$	(0.61	)

The shares underlying the conversion option in the 2024 Notes and 2026 Notes were not considered in the calculation of diluted net loss per share as the effect would have been anti-dilutive. Based on the initial conversion price, the entire outstanding principal amount of the 2024 Notes and 2026 Notes as of April 30, 2020 would have been convertible into approximately 6.8 million shares of the Company’s Class A common stock. However, the Company currently expects to settle the principal amount of the 2024 Notes and 2026 Notes in cash. As a result, only the amount by which the conversion value exceeds the aggregate principal amount of the 2024 Notes and 2026 Notes (the “conversion spread”) is considered in the diluted earnings per share computation under the treasury stock method. The conversion spread has a dilutive impact on diluted net income per share when the average market price of the Company’s Class A common stock for a given period exceeds the initial conversion price of $68.15 per share for the 2024 Notes and $211.20 per share for the 2026 Notes. In connection with the issuance of the 2024 Notes and 2026 Notes, the Company entered into Capped Calls, which were not included for purposes of calculating the number of diluted shares outstanding, as their effect would have been anti-dilutive. The Capped Calls are expected to partially offset the potential dilution to the Company’s Class A common stock upon any conversion of the 2024 Notes and 2026 Notes.

During the three months ended April 30, 2020, the average market price of the Company’s Class A common stock was $146.81, which exceeded the initial conversion price of the 2024 Notes. As of April 30, 2020, the Company had not received any material conversion notices for the 2024 Notes. For disclosure purposes, the Company calculated the potentially dilutive effect of the conversion spread for the 2024 Notes, which is included in the table below. The Company excluded the potentially dilutive effect of the conversion spread for the 2026 Notes as the average market price of the Company’s Class A common stock during the three months ended April 30, 2020 was less than the conversion price of the 2026 Notes.

The following weighted-average outstanding potentially dilutive shares of common stock were excluded from the computation of diluted net loss per share for the periods presented because the impact of including them would have been anti-dilutive.



	Three Months Ended April 30,
	2020	2019
Stock options to purchase Class A common stock	1,646,894	2,471,439
Stock options to purchase Class B common stock	4,326,300	5,700,441
Unvested restricted stock units	3,866,970	2,561,471
Early exercised stock options	10,157	47,550
Shares underlying the conversion spread in the convertible senior notes	707,613	1,945,081

Income Taxes	3 Months Ended
Income Taxes	Apr. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company recorded a provision (benefit) related to income taxes of $0.2 million and $(0.1) million for the three months ended April 30, 2020 and 2019, respectively. The provision recorded during the three months ended April 30, 2020 was driven by an increase in foreign taxes as the Company continued its global expansion, partially offset by a tax benefit related to current period gains recorded in other comprehensive income that resulted from unrealized gains on investments and a tax benefit related to true-up adjustments from the adoption of ASC 842. The Company no longer benefits from excess tax deductions in the United Kingdom as those deferred tax assets were reduced by a valuation allowance as of April 30, 2020. The calculation of income taxes is based upon the estimated annual effective tax rates for the year applied to the current period income (loss) before tax plus the tax effect of any significant unusual items, discrete events or changes in tax law. The Company assesses uncertain tax positions in accordance with ASC 740-10, Accounting for Uncertainties in Tax. As of January 31, 2020, the Company’s net unrecognized tax benefits totaled $5.3 million, of which $0.1 million would impact the Company’s effective tax rate if recognized. The Company anticipates that the amount of reasonably possible unrecognized tax benefits that could decrease over the next twelve months due to the expiration of certain statutes of limitations and settlement of tax audits is not material to the Company’s interim unaudited condensed consolidated financial statements. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) was signed into law. The CARES Act includes provisions relating to refundable payroll tax credits, deferral of certain payroll taxes, technical corrections to tax depreciation methods for qualified improvement property, net operating loss carryback periods, alternative minimum tax credit refunds and modifications to the net interest deduction limitations. The CARES Act did not have a material impact on the Company’s interim unaudited condensed consolidated financial statements for the three months ended April 30, 2020. The Company will continue to monitor any effects that may result from the CARES Act.

Summary of Significant Accounting Policies (Policies)	3 Months Ended
Summary of Significant Accounting Policies (Policies)	Apr. 30, 2020
Accounting Policies [Abstract]
Basis of Presentation	The interim unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and include the accounts of the Company and its wholly owned subsidiaries. All intercompany transactions and accounts have been eliminated. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to the applicable rules and regulations of the Securities and Exchange Commission. The condensed balance sheet data as of January 31, 2020 was derived from the Company’s audited financial statements, but does not include all disclosures required by U.S. GAAP. Therefore, these interim unaudited condensed consolidated financial statements and accompanying footnotes should be read in conjunction with the Company’s annual consolidated financial statements and related footnotes included in its Annual Report on Form 10-K for the fiscal year ended January 31, 2020 (the “2020 Form 10-K”).
Use of Estimates	The preparation of the interim unaudited condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates, assumptions and judgments that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Such estimates include, but are not limited to, revenue recognition, allowances for doubtful accounts, the incremental borrowing rate related to the Company’s lease liabilities, stock-based compensation, fair value of the liability component of the convertible debt, fair value of common stock and redeemable convertible preferred stock warrants prior to the initial public offering, legal contingencies, fair value of acquired intangible assets and goodwill, useful lives of acquired intangible assets and property and equipment and accounting for income taxes. The Company bases these estimates on historical and anticipated results, trends and various other assumptions that it believes are reasonable under the circumstances, including assumptions as to future events.
Related Party Transactions	All contracts with related parties are executed in ordinary course of business.
New Accounting Pronouncements Not Yet Adopted and New Accounting Pronouncements Not Yet Adopted	Goodwill Impairment. In January 2017, the FASB issued ASU 2017-04—Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The new standard simplifies the measurement of goodwill by eliminating step two of the two-step impairment test. Step two measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. The new guidance requires an entity to compare the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. Additionally, an entity should consider income tax effects from any tax-deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. The new guidance, effective February 1, 2020, did not have an impact on the Company’s condensed consolidated financial statements. Cloud Computing. In August 2018, the FASB issued ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, which aligns the accounting for implementation costs incurred in a hosting arrangement that is a service contract with the accounting for implementation costs incurred to develop or obtain internal-use software under ASC 350-40, in order to determine which costs to capitalize and recognize as an asset and which costs to expense. The Company adopted ASU 2018-15, effective February 1, 2020, prospectively for implementation costs incurred after the date of adoption. ASU 2018-15 did not have an impact on the Company’s condensed consolidated financial statements upon adoption. Credit Losses. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which requires the measurement and recognition of expected credit losses for financial assets held at amortized cost, which includes the Company's accounts receivable, including unbilled receivables, as well as certain financial instruments. ASU 2016-13 replaces the existing incurred loss impairment model with an expected loss methodology, which will result in more timely recognition of credit losses. ASU 2016-13 eliminates the concept of other-than-temporary impairment and requires credit losses related to available-for-sale debt securities to be recorded through an allowance for credit losses rather than as a reduction in the amortized cost basis of the securities. Effective February 1, 2020, the Company adopted ASU 2016-13 using the modified retrospective transition approach, which requires a cumulative effect adjustment to the balance sheet as of February 1, 2020. As a result of the adoption, the Company recorded a cumulative effect adjustment to increase the accumulated deficit by $0.2 million, which represented the accelerated recognition of credit losses under the expected credit loss model of calculating current expected credit losses compared to the previous incurred loss impairment model. The following two significant accounting policies have changed from the Company’s 2020 Form 10-K as a result of the adoption of ASU 2016-13. New Accounting Pronouncements Not Yet Adopted Income Taxes. In December 2019, the FASB issued ASU 2019-12—Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The amendments in ASU 2019-12 simplify the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application and simplification of GAAP for other areas of Topic 740 by clarifying and amending existing guidance. ASU 2019-12 is effective for the Company beginning February 1, 2021, although early adoption of the amendments is permitted. The Company is currently evaluating the impact of ASU 2019-12 on its consolidated financial statements.
Accounts Receivable and Allowance for Doubtful Accounts	The Company records a receivable when an unconditional right to consideration exists, such that only the passage of time is required before payment of consideration is due. Timing of revenue recognition may differ from the timing of invoicing to customers. If revenue recognized on a contract exceeds the billings, then the Company records an unbilled receivable for that excess amount, which is included as part of accounts receivable, net in the Company’s condensed consolidated balance sheets. The Company is exposed to credit losses primarily through the sales of subscriptions and services, which are recorded as accounts receivable, inclusive of unbilled receivables. The Company performs initial and ongoing evaluations of its customers' financial position and generally extends credit without collateral. Accounts receivable are recorded at amortized cost, net of an allowance for doubtful accounts, and do not bear interest. The allowance for doubtful accounts represents the best estimate of lifetime expected credit losses against the existing accounts receivable, inclusive of unbilled receivables, based on certain factors including past collection experience, credit quality of the customer, current aging of the receivable balance, current economic conditions, reasonable and supportable forecasts, as well as specific circumstances arising with individual customers. Extensive judgment is required in assessing these factors. Due to the short-term nature of the Company’s accounts receivable, forecasts have limited relevance to the Company’s expected credit loss estimates. Accounts receivable are written off against the allowance when management determines a balance is uncollectible and the Company no longer actively pursues collection of the receivable. The Company’s estimates of the allowance for credit losses may not be indicative of our actual credit losses requiring additional charges to be incurred to reflect the actual amount collected.
Marketable Securities	The Company’s short-term investments consist of U.S. government treasury securities. The Company determines the appropriate classification of its short-term investments at the time of purchase and reevaluates such designation at each balance sheet date. The Company has classified and accounted for its short-term investments as available-for-sale debt securities as the Company may sell these securities at any time for use in its current operations or for other purposes, even prior to maturity. As a result, the Company classifies its short-term investments within current assets on the condensed consolidated balance sheets. Available-for-sale debt securities are recorded at fair value each reporting period. Realized gains and losses are determined based on the individual security level and are reported in other income (expense), net in the condensed consolidated statements of operations. Unrealized gains on these short-term investments are reported as a separate component of accumulated other comprehensive income (loss) on the condensed consolidated balance sheets until realized. If the estimated fair value of an available-for-sale debt security is below its amortized cost basis, then the Company evaluates for impairment. The Company considers its intent to sell the security or whether it is more likely than not that it will be required to sell the security before recovery of its amortized basis. If either of these criteria are met, the debt security’s amortized cost basis is written down to fair value through other income (expense), net in the condensed consolidated statements of operations. If neither of these criteria are met, the Company evaluates whether unrealized losses have resulted from a credit loss or other factors. The factors considered in determining whether a credit loss exists can include the extent to which fair value is less than the amortized cost basis, changes to the rating of the security by a rating agency, any adverse conditions specifically related to the security, as well as other factors. An impairment relating to credit losses is recorded through an allowance for credit losses reported in other income (expense), net in the condensed consolidated statements of operations. The allowance is limited by the amount that the fair value of the debt security is below its amortized cost basis. When a credit loss exists, the Company compares the present value of cash flows expected to be collected from the debt security with the amortized cost basis of the security to determine what allowance amount, if any, should be recorded. Unrealized losses not resulting from credit losses are recorded through accumulated other comprehensive income (loss) on the condensed consolidated balance sheets.
Net Loss per Share	The Company calculates basic net loss per share by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period, less shares subject to repurchase. Diluted net loss per share is computed by giving effect to all potentially dilutive common stock equivalents outstanding for the period, including stock options and restricted stock units. Basic and diluted net loss per share was the same for each period presented, as the inclusion of all potential common shares outstanding would have been anti-dilutive due to the net loss reported for each period presented. The rights, including the liquidation and dividend rights, of the holders of Class A and Class B common stock are identical, except with respect to voting. Each share of Class A common stock is entitled to one vote per share and each share of Class B common stock is entitled to 10 votes per share. As the liquidation and dividend rights are identical for Class A and Class B common stock, the undistributed earnings are allocated on a proportionate basis and the resulting net loss per share will, therefore, be the same for both Class A and Class B common stock on an individual or combined basis.
Income Taxes	The Company assesses uncertain tax positions in accordance with ASC 740-10, Accounting for Uncertainties in Tax.

- Definition

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32847-109319

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 954
-SubTopic 740
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6491622&loc=d3e9504-115650

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 17
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32809-109319

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=116657188&loc=SL116659661-227067

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32840-109319

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 25
-URI http://asc.fasb.org/extlink&oid=116821951&loc=d3e32247-109318

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=116821951&loc=d3e32280-109318

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 30
-Section 05
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=65884525&loc=d3e40913-109327

+ Details

Fair Value Measurements (Tables)

3 Months Ended

Apr. 30, 2020

Fair Value Disclosures [Abstract]

Schedule of financial assets and liabilities measured at fair value on a recurring basis



	Fair Value Measurement at April 30, 2020
	Level 1		Level 2		Level 3		Total
Financial Assets:
Cash and cash equivalents:
Money market funds	$	631,466	$	—	$	—	$	631,466
Short-term investments:
U.S. government treasury securities	276,372		—		—		276,372
Total financial assets	$	907,838	$	—	$	—	$	907,838



	Fair Value Measurement at January 31, 2020
	Level 1		Level 2		Level 3		Total
Financial Assets:
Cash and cash equivalents:
Money market funds	$	623,856	$	—	$	—	$	623,856
Short-term investments:
U.S. government treasury securities	280,326		—		—		280,326
Total financial assets	$	904,182	$	—	$	—	$	904,182

Goodwill and Acquired Intangible Assets, Net (Tables)

3 Months Ended

Apr. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Gross carrying amount and accumulated amortization of intangible assets

The gross carrying amount and accumulated amortization of the Company’s intangible assets are as follows (in thousands):



	April 30, 2020
	Gross Carrying Value		Accumulated Amortization			Net Book Value
Developed technology	$	34,700	$	(12,860	)	$	21,840
Domain name	155		(155		)	—
Customer relationships	15,200		(4,390		)	10,810
Total	$	50,055	$	(17,405	)	$	32,650



	January 31, 2020
	Gross Carrying Value		Accumulated Amortization			Net Book Value
Developed technology	$	34,700	$	(11,495	)	$	23,205
Domain name	155		(151		)	4
Customer relationships	15,200		(3,630		)	11,570
Total	$	50,055	$	(15,276	)	$	34,779

Future amortization expense related to intangible assets

As of April 30, 2020, future amortization expense related to the intangible assets is as follows (in thousands):



Years Ending January 31,
Remainder of 2021	$	6,375
2022	8,500
2023	8,500
2024	7,825
2025	1,450
2026	—
Total	$	32,650

Convertible Senior Notes (Tables)

3 Months Ended

Apr. 30, 2020

Debt Disclosure [Abstract]

Convertible debt schedules

The net carrying amounts of the liability component of the 2024 Notes and 2026 Notes were as follows (in thousands):



	April 30, 2020
	2024 Notes			2026 Notes
Principal	$	90,001		$	1,150,000
Unamortized debt discount	(18,465		)	(282,386		)
Unamortized debt issuance costs	(1,475		)	(14,577		)
Net carrying amount	$	70,061		$	853,037

Interest expense related to Notes

The following table sets forth the interest expense related to the 2024 Notes and 2026 Notes (in thousands):



	Three Months Ended April 30, 2020				Three Months Ended April 30, 2019
	2024 Notes		2026 Notes		2024 Notes		2026 Notes
Contractual interest expense	$	169	$	719	$	563	$	—
Amortization of debt discount	970		10,547		3,033		—
Amortization of issuance costs	65		441		188		—
Total	$	1,204	$	11,707	$	3,784	$	—

Leases (Tables)

3 Months Ended

Apr. 30, 2020

Leases [Abstract]

Lease, Cost

The following table presents supplemental information related to the Company’s finance and operating leases (in thousands, except weighted-average information):



	Three Months Ended April 30, 2020			Three Months Ended April 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance lease	$	884		$	—
Operating cash flows from operating leases	1,297			1,032
Financing cash flows from finance lease	1,135			—
Right-of-use assets obtained in exchange for lease obligations:
Finance lease	$	—		$	—
Operating leases	23,375			2,269
Weighted-average remaining lease term (in years):
Finance lease	9.7			10.7
Operating leases	8.7			4.8
Weighted-average discount rate:
Finance lease	5.6		%	5.6		%
Operating leases	5.0		%	6.1		%

The components of the Company’s lease costs included in its condensed consolidated statement of operations were as follows (in thousands):



	Three Months Ended April 30, 2020		Three Months Ended April 30, 2019
Finance lease cost:
Amortization of right-of-use assets	$	994	$	994
Interest on lease liabilities	884		905
Operating lease cost	1,823		967
Short-term lease cost	793		395
Total lease cost	$	4,494	$	3,261

Assets And Liabilities, Lessee

The balances of the Company’s finance and operating leases were recorded on the condensed consolidated balance sheet as follows (in thousands):



	April 30, 2020		January 31, 2020
Finance Lease:
Property and equipment, net	$	38,418	$	39,411
Other accrued liabilities	4,698		4,633
Other liabilities, non-current	58,057		59,257
Operating Leases:
Operating lease right-of-use assets	$	32,965	$	11,147
Operating lease liabilities (current)	4,005		3,750
Operating lease liabilities, non-current	29,625		8,113

Finance Lease, Liability, Maturity

Future minimum lease payments under non-cancelable finance and operating leases on an annual undiscounted cash flow basis as of April 30, 2020 were as follows (in thousands):



Year Ending January 31,	Finance Lease			Operating Leases
Remainder of 2021	$	6,055		$	3,625
2022	8,073			5,524
2023	8,073			5,557
2024	8,073			4,512
2025	8,445			4,125
Thereafter	42,829			18,180
Total minimum payments	81,548			41,523
Less imputed interest	(18,793		)	(7,893		)
Present value of future minimum lease payments	62,755			33,630
Less current obligations under leases	(4,698		)	(4,005		)
Non-current lease obligations	$	58,057		$	29,625

Lessee, Operating Lease, Liability, Maturity

Future minimum lease payments under non-cancelable finance and operating leases on an annual undiscounted cash flow basis as of April 30, 2020 were as follows (in thousands):



Year Ending January 31,	Finance Lease			Operating Leases
Remainder of 2021	$	6,055		$	3,625
2022	8,073			5,524
2023	8,073			5,557
2024	8,073			4,512
2025	8,445			4,125
Thereafter	42,829			18,180
Total minimum payments	81,548			41,523
Less imputed interest	(18,793		)	(7,893		)
Present value of future minimum lease payments	62,755			33,630
Less current obligations under leases	(4,698		)	(4,005		)
Non-current lease obligations	$	58,057		$	29,625

Revenue (Tables)

3 Months Ended

Apr. 30, 2020

Revenues [Abstract]

Schedule of total revenue by geographic areas

The following table presents the Company’s revenues disaggregated by primary geographical markets, subscription product categories and services (in thousands):



	Three Months Ended April 30,
	2020		2019
Primary geographical markets:
Americas	$	81,538	$	57,756
EMEA	39,009		25,320
Asia Pacific	9,782		6,312
Total	$	130,329	$	89,388

Subscription product categories and services:
MongoDB Atlas-related	$	54,170	$	30,863
Other subscription	70,686		53,131
Services	5,473		5,394
Total	$	130,329	$	89,388

Accounts Receivable, Allowance for Credit Loss

The following is a summary of the changes in the Company’s allowance for doubtful accounts (in thousands):



	Allowance for Doubtful Accounts
Balance at January 31, 2020	$	2,515
Adoption of new accounting standard	50
Provision	2,075
Recoveries/write-offs	(313		)
Balance at April 30, 2020	$	4,327

Equity Incentive Plans and Employee Stock Purchase Plan (Tables)

3 Months Ended

Apr. 30, 2020

Share-based Payment Arrangement [Abstract]

Schedule of stock option activity

The following table summarizes stock option activity for the three months ended April 30, 2020 (in thousands, except share and per share data and years):



	Shares		Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (In Years)	Aggregate Intrinsic Value
Balance - January 31, 2020	6,178,999		$	7.60	5.7	$	965,860
Stock options exercised	(373,394	)	8.03
Stock options forfeited and expired	(16,389	)	10.06
Balance - April 30, 2020	5,789,216		$	7.56	5.5	$	894,828
Vested and exercisable - January 31, 2020	4,693,273		$	7.08	5.4	$	736,034
Vested and exercisable - April 30, 2020	4,635,511		$	7.11	5.2	$	718,616

Schedule of restricted stock unit activity

The following table summarizes RSU activity for the three months ended April 30, 2020:



	Shares		Weighted-Average Grant Date Fair Value per RSU
Unvested - January 31, 2020	3,281,431		$	102.30
RSUs granted	1,077,847		148.52
RSUs vested	(241,569	)	86.41
RSUs forfeited and canceled	(87,213	)	103.95
Unvested - April 30, 2020	4,030,496		$	115.58

Schedule of stock-based compensation expense recognized in consolidated statements of operations

Total stock-based compensation expense recognized in the Company’s unaudited condensed consolidated statements of operations is as follows (in thousands):



	Three Months Ended April 30,
	2020		2019
Cost of revenue—subscription	$	1,827	$	988
Cost of revenue—services	1,146		593
Sales and marketing	10,823		4,940
Research and development	11,759		4,520
General and administrative	5,012		2,968
Total stock-based compensation expense	$	30,567	$	14,009

Net Loss Per Share (Tables)

3 Months Ended

Apr. 30, 2020

Earnings Per Share [Abstract]

Schedule of basic and diluted earnings (loss) per share

The following table sets forth the computation of basic and diluted net loss per share (in thousands, except share and per share data):



	Three Months Ended April 30,
	2020			2019
Numerator:
Net loss	$	(53,967	)	$	(33,240	)

Denominator:
Weighted-average shares used to compute net loss per share, basic and diluted	57,649,524			54,710,746

Net loss per share, basic and diluted	$	(0.94	)	$	(0.61	)

Schedule of antidilutive securities excluded from computation of earnings per share



	Three Months Ended April 30,
	2020	2019
Stock options to purchase Class A common stock	1,646,894	2,471,439
Stock options to purchase Class B common stock	4,326,300	5,700,441
Unvested restricted stock units	3,866,970	2,561,471
Early exercised stock options	10,157	47,550
Shares underlying the conversion spread in the convertible senior notes	707,613	1,945,081

Summary of Significant Accounting Policies (Details) - USD ($)	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Jan. 31, 2020	Jan. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Related party transactions	$ 0	$ 0
Amounts payable to or receivable from related parties	0		$ 0
Cumulative effect of accounting change	(63,041,000)	(247,868,000)	(82,858,000)	$ (264,566,000)
Accumulated Deficit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change	$ 722,426,000	525,950,000	668,232,000	$ 488,607,000
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change		4,103,000	227,000
Cumulative Effect, Period of Adoption, Adjustment \| Accumulated Deficit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change		$ 4,103,000	$ 227,000

Fair Value Measurements - Schedule of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Jan. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gain on securities	$ 1,000
Short-term investments:
Total financial assets	907,838	$ 904,182
Level 1
Short-term investments:
Total financial assets	907,838	904,182
Level 2
Short-term investments:
Total financial assets	0	0
Level 3
Short-term investments:
Total financial assets	0	0
U.S. government treasury securities
Short-term investments:
Short-term investments:	276,372	280,326
U.S. government treasury securities \| Level 1
Short-term investments:
Short-term investments:	276,372	280,326
U.S. government treasury securities \| Level 2
Short-term investments:
Short-term investments:	0	0
U.S. government treasury securities \| Level 3
Short-term investments:
Short-term investments:	0	0
Money market funds
Cash and cash equivalents:
Cash and cash equivalents:	631,466	623,856
Money market funds \| Level 1
Cash and cash equivalents:
Cash and cash equivalents:	631,466	623,856
Money market funds \| Level 2
Cash and cash equivalents:
Cash and cash equivalents:	0	0
Money market funds \| Level 3
Cash and cash equivalents:
Cash and cash equivalents:	$ 0	$ 0

Goodwill and Acquired Intangible Assets, Net - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Jan. 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 50,055	$ 50,055
Accumulated Amortization	(17,405)	(15,276)
Net Book Value	32,650	34,779
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	34,700	34,700
Accumulated Amortization	(12,860)	(11,495)
Net Book Value	21,840	23,205
Domain name
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	155	155
Accumulated Amortization	(155)	(151)
Net Book Value	0	4
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	15,200	15,200
Accumulated Amortization	(4,390)	(3,630)
Net Book Value	$ 10,810	$ 11,570

Goodwill and Acquired Intangible Assets, Net - Additional Information (Details) $ in Millions	3 Months Ended
	Apr. 30, 2020 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 2.1
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life	4 years
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life	3 years 7 months 6 days

Goodwill and Acquired Intangible Assets, Net - Future Amortization Expense (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Jan. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2021	$ 6,375
2022	8,500
2023	8,500
2024	7,825
2025	1,450
2026	0
Net Book Value	$ 32,650	$ 34,779

Convertible Senior Notes - Additional Information (Details)		1 Months Ended	2 Months Ended	3 Months Ended
	Jan. 14, 2020 USD ($)	Jan. 31, 2020 USD ($)	Jul. 31, 2018 USD ($)	Apr. 30, 2020 USD ($) day	Jun. 30, 2018 USD ($)
2026 Notes
Debt Instrument [Line Items]
Fair value of convertible debt				$ 1,200,000,000
2024 Notes
Debt Instrument [Line Items]
Fair value of convertible debt				$ 193,500,000
Redemption Period 1
Debt Instrument [Line Items]
Threshold percentage of stock price trigger				130.00%
Consecutive threshold trading days \| day				30
Redemption Period 1 \| Minimum
Debt Instrument [Line Items]
Threshold trading days \| day				20
Convertible Debt
Debt Instrument [Line Items]
Face amount of debt	$ 90,000,000.0		$ 50,000,000.0		$ 250,000,000.0
Interest rate			0.75%		0.75%
Proceeds from borrowings on convertible senior notes, net of issuance costs	479,200,000		$ 291,100,000
Convertible debt, conversion ratio denominator				$ 100
Convertible Debt \| 2026 Notes
Debt Instrument [Line Items]
Face amount of debt		$ 1,000,000,000.0
Interest rate		0.25%
Proceeds from borrowings on convertible senior notes, net of issuance costs		$ 1,130,000,000
Convertible Debt \| Additional Convertible Senior Notes Due 2026
Debt Instrument [Line Items]
Face amount of debt		$ 150,000,000.0
Convertible Debt \| 2024 Notes Partial Repurchase
Debt Instrument [Line Items]
Face amount of debt	210,000,000.0
Convertible Debt \| Convertible Senior Notes, Liability Component
Debt Instrument [Line Items]
Proceeds from borrowings on convertible senior notes, net of issuance costs	175,100,000
Convertible Debt \| Convertible Senior Notes, Equity Component
Debt Instrument [Line Items]
Proceeds from borrowings on convertible senior notes, net of issuance costs	303,900,000
Convertible Debt \| Convertible Senior Notes, Interest Component
Debt Instrument [Line Items]
Proceeds from borrowings on convertible senior notes, net of issuance costs	$ 200,000

Convertible Senior Notes - Schedule of Net Carrying Amount of the Liability Component of the Notes (Details) $ in Thousands	Apr. 30, 2020 USD ($)
2024 Notes
Debt Instrument [Line Items]
Principal	$ 90,001
Unamortized debt discount	(18,465)
Unamortized debt issuance costs	(1,475)
Net carrying amount	70,061
2026 Notes
Debt Instrument [Line Items]
Principal	1,150,000
Unamortized debt discount	(282,386)
Unamortized debt issuance costs	(14,577)
Net carrying amount	$ 853,037

Convertible Senior Notes - Schedule of Interest Expense for the Notes (Details) - Convertible Debt - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
2024 Notes
Debt Instrument [Line Items]
Contractual interest expense	$ 169	$ 563
Amortization of debt discount	970	3,033
Amortization of issuance costs	65	188
Total	1,204	3,784
2026 Notes
Debt Instrument [Line Items]
Contractual interest expense	719	0
Amortization of debt discount	10,547	0
Amortization of issuance costs	441	0
Total	$ 11,707	$ 0

Convertible Senior Notes - Capped Calls (Details)	3 Months Ended
Convertible Senior Notes - Capped Calls (Details)	Apr. 30, 2020 $ / shares
Capped Calls
Option Indexed to Issuer's Equity [Line Items]
Strike price (in dollars per share)	$ 68.15
Cap price (in dollars per share)	106.90
Convertible Debt \| 2026 Notes
Option Indexed to Issuer's Equity [Line Items]
Strike price (in dollars per share)	211.20
Cap price (in dollars per share)	$ 296.42

Leases - Narrative (Details) $ in Thousands	3 Months Ended
Leases - Narrative (Details) $ in Thousands	Apr. 30, 2020 USD ($) ft²	Dec. 31, 2019 ft²	Oct. 31, 2019
Lessee, Lease, Description [Line Items]
Total minimum payments	$ 81,548
NY Office Lease
Lessee, Lease, Description [Line Items]
Rentable office space (in sqft) \| ft²	106,230
Term of contract	12 years
Total minimum payments	$ 87,300
Financing lease renewal term	5 years
Area of leased space (in sq ft) \| ft²	21,000
Operating lease, term of contract			5 years
Lease not yet commenced, estimated base rent payments	$ 8,400
Dublin Lease
Lessee, Lease, Description [Line Items]
Area of leased space (in sq ft) \| ft²		40,000
Operating lease, term of contract	12 years
Operating lease renewal term	5 years
estimated aggregate base rent payments, excluding the renewal options	$ 27,000
Palo Alto
Lessee, Lease, Description [Line Items]
Area of leased space (in sq ft) \| ft²	16,000
Operating lease, term of contract	8 years
Operating lease renewal term	5 years
Lease not yet commenced, estimated base rent payments	$ 14,200

Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Finance lease cost:
Amortization of right-of-use assets	$ 994	$ 994
Interest on lease liabilities	884	905
Operating lease cost	1,823	967
Short-term lease cost	793	395
Total lease cost	$ 4,494	$ 3,261

Leases - Balance Sheet Components (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Jan. 31, 2020
Finance Lease:
Property and equipment, net	$ 38,418	$ 39,411
Other accrued liabilities	4,698	4,633
Other liabilities, non-current	58,057	59,257
Operating Leases:
Operating lease right-of-use assets	32,965	11,147
Operating lease liabilities (current)	4,005	3,750
Operating lease liabilities, non-current	$ 29,625	$ 8,113

Leases - Supplemental Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance lease	$ 884	$ 0
Operating cash flows from operating leases	1,297	1,032
Financing cash flows from finance lease	1,135	0
Right-of-use assets obtained in exchange for lease obligations:
Finance lease	0	0
Operating leases	$ 23,375	$ 2,269
Weighted-average remaining lease term (in years):
Finance lease	9 years 8 months 12 days	10 years 8 months 12 days
Operating leases	8 years 8 months 12 days	4 years 9 months 18 days
Weighted-average discount rate:
Finance lease	5.60%	5.60%
Operating leases	5.00%	6.10%

Leases - Lease Maturities (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Jan. 31, 2020
Finance Lease, Liability, Payment, Due [Abstract]
Remainder of 2021	$ 6,055
2022	8,073
2023	8,073
2024	8,073
2025	8,445
Thereafter	42,829
Total minimum payments	81,548
Less imputed interest	(18,793)
Present value of future minimum lease payments	62,755
Less current obligations under leases	(4,698)	$ (4,633)
Non-current lease obligations	58,057	59,257
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Remainder of 2021	3,625
2022	5,524
2023	5,557
2024	4,512
2025	4,125
Thereafter	18,180
Total minimum payments	41,523
Less imputed interest	(7,893)
Present value of future minimum lease payments	33,630
Less current obligations under leases	(4,005)	(3,750)
Non-current lease obligations	$ 29,625	$ 8,113

Commitments and Contingencies (Details) - USD ($)	Apr. 30, 2020	Jan. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Accrual for contingencies	$ 0	$ 0

Revenue - Schedule of total revenue by geographic areas (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 130,329	$ 89,388
MongoDB Atlas-related
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	54,170	30,863
Other subscription
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	70,686	53,131
Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	5,473	5,394
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	81,538	57,756
Europe, Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	39,009	25,320
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 9,782	$ 6,312

Revenue - Concentration Risk (Details) - Geographic Concentration Risk - Revenue, Net	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
United States
Concentration Risk [Line Items]
Concentration risk, percentage	58.00%	60.00%
United Kingdom
Concentration Risk [Line Items]
Concentration risk, percentage	9.00%	10.00%

Revenue - Additional Information (Details) - USD ($)	3 Months Ended
Revenue - Additional Information (Details) - USD ($)	Apr. 30, 2020	Apr. 30, 2019	Jan. 31, 2020
Revenues [Abstract]
Deferred revenue	$ 193,000,000.0		$ 190,800,000
Percent of revenue recognized from deferred revenue	52.00%	50.00%
Remaining performance obligation	$ 209,700,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unbilled receivables	5,900,000
Deferred commissions	80,000,000.0
Amortization of deferred commissions	6,500,000	$ 4,400,000
Impairment loss	$ 0	$ 0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-11-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	54.00%
Expected timing of satisfaction of remaining performance obligation	12 months

Revenue - Schedule of Allowance for Doubtful Accounts (Details) $ in Thousands	3 Months Ended
	Apr. 30, 2020 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	$ 2,515
Provision	2,075
Recoveries/write-offs	(313)
Ending balance	4,327
Cumulative Effect, Period of Adoption, Adjustment \| Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Line Items]
Ending balance	$ 50

Equity Incentive Plans and Employee Stock Purchase Plan - Stock Options (Details) - Employee Stock Option	3 Months Ended
	Apr. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
One Year Anniversary
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights percentage	25.00%
13 to 36 Months
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights percentage	75.00%

Equity Incentive Plans and Employee Stock Purchase Plan - Schedule of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 30, 2020	Jan. 31, 2019	Jan. 31, 2020
Shares
Balance - beginning of period (in shares)	6,178,999
Stock options exercised (in shares)	(373,394)
Stock options forfeited and expired (in shares)	(16,389)
Balance - end of period (in shares)	5,789,216
Vested and exercisable (in shares)	4,635,511		4,693,273
Weighted- Average Exercise Price Per Share
Balance - beginning of period (in dollars per share)	$ 7.60
Stock options exercised (in dollars per share)	8.03
Stock options forfeited and expired (in dollars per share)	10.06
Balance - end of period (in dollars per share)	7.56
Vested and exercisable (in dollars per share)	$ 7.11		$ 7.08
Weighted- Average Remaining Contractual Term (In Years)
Balance	5 years 6 months	5 years 8 months 12 days
Vested and exercisable	5 years 2 months 12 days	5 years 4 months 24 days
Aggregate Intrinsic Value
Balance	$ 894,828		$ 965,860
Vested and exercisable	$ 718,616		$ 736,034

Equity Incentive Plans and Employee Stock Purchase Plan - Restricted Stock Units, Additional Information (Details) - Restricted Stock Units (RSUs)	3 Months Ended
	Apr. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
One Year Anniversary
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Vesting rights percentage	25.00%
13 to 36 Months
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights percentage	75.00%

Equity Incentive Plans and Employee Stock Purchase Plan - Schedule of Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs)	3 Months Ended
	Apr. 30, 2020 $ / shares shares
Shares
Unvested - beginning of period (in shares) \| shares	3,281,431
RSUs granted (in shares) \| shares	1,077,847
RSUs vested (in shares) \| shares	(241,569)
RSUs forfeited and canceled (in shares) \| shares	(87,213)
Unvested - end of period (in shares) \| shares	4,030,496
Weighted-Average Grant Date Fair Value per RSU
Unvested - beginning of period (in dollars per share) \| $ / shares	$ 102.30
RSUs granted (in dollars per share) \| $ / shares	148.52
RSUs vested (in dollars per share) \| $ / shares	86.41
RSUs forfeited and canceled (in dollars per share) \| $ / shares	103.95
Unvested - end of period (in dollars per share) \| $ / shares	$ 115.58

Equity Incentive Plans and Employee Stock Purchase Plan - Employee Stock Purchase Plan, Additional Information (Details)	Apr. 30, 2020
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum employee contribution rate	15.00%

Equity Incentive Plans and Employee Stock Purchase Plan - Stock-based Compensation Expense Recognized in Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 30,567	$ 14,009
Cost of revenue—subscription
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	1,827	988
Cost of revenue—services
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	1,146	593
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	10,823	4,940
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	11,759	4,520
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 5,012	$ 2,968

Net Loss Per Share - Additional Information (Details)	3 Months Ended
Net Loss Per Share - Additional Information (Details)	Apr. 30, 2020 shares $ / shares
Class of Stock [Line Items]
Shares issuable upon conversion (in shares) \| shares	6,800,000
Average market price (in dollars per share) \| $ / shares	$ 146.81
Class A Common Stock
Class of Stock [Line Items]
Number of votes per share \| shares	1
Class B Common Stock
Class of Stock [Line Items]
Number of votes per share \| shares	10
Convertible Debt \| 2024 Notes
Class of Stock [Line Items]
Initial conversion price (in dollars per share) \| $ / shares	$ 68.15
Convertible Debt \| 2026 Notes
Class of Stock [Line Items]
Initial conversion price (in dollars per share) \| $ / shares	$ 211.20

Net Loss Per Share - Schedule of Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Numerator:
Net loss	$ (53,967)	$ (33,240)
Denominator:
Weighted-average shares used to compute net loss per share, basic and diluted (in shares)	57,649,524	54,710,746
Net loss per share, basic and diluted (in dollars per share)	$ (0.94)	$ (0.61)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Net Loss Per Share - Schedule of Antidilutive Securities Excluded from the Computation of Diluted Net Loss per Share (Details) - shares	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Stock options to purchase common stock \| Class A Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	1,646,894	2,471,439
Stock options to purchase common stock \| Class B Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	4,326,300	5,700,441
Unvested restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	3,866,970	2,561,471
Early exercised stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	10,157	47,550
Shares underlying the conversion spread in the convertible senior notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	707,613	1,945,081

Income Taxes (Details) - USD ($)	3 Months Ended
Income Taxes (Details) - USD ($)	Apr. 30, 2020	Apr. 30, 2019	Jan. 31, 2020
Income Tax Disclosure [Abstract]
Provision (benefit) for income taxes	$ 234,000	$ (138,000)
Unrecognized tax benefits			$ 5,300,000
Unrecognized tax benefits that would impact effective tax rate			$ 100,000
Decrease in unrecognized tax benefits is reasonably possible	$ 0

Label	Element	Value
Restricted Cash and Cash Equivalents, Noncurrent	us-gaap_RestrictedCashAndCashEquivalentsNoncurrent	$ 512,000
Restricted Cash and Cash Equivalents, Noncurrent	us-gaap_RestrictedCashAndCashEquivalentsNoncurrent	$ 514,000