Domo (DOMO) 10-Q 13 Dec 18 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Oct. 31, 2018	Dec. 12, 2018
Class of Stock [Line Items]
Entity Registrant Name	Domo, Inc.
Entity Central Index Key	1,505,952
Current Fiscal Year End Date	--01-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Document Type	10-Q
Document Period End Date	Oct. 31, 2018
Document Fiscal Year Focus	2,019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Class A Common Stock
Class of Stock [Line Items]
Entity Common Stock, Shares Outstanding		3,263,659
Class B Common Stock
Class of Stock [Line Items]
Entity Common Stock, Shares Outstanding		23,074,264

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Oct. 31, 2018	Jan. 31, 2018
Current assets:
Cash and cash equivalents	$ 205,999	$ 61,972
Accounts receivable, net of allowances of $2,919 and $2,004 as of January 31, 2018 and October 31, 2018, respectively	29,805	35,484
Contract acquisition costs	8,795	9,661
Prepaid expenses and other current assets	8,063	6,144
Total current assets	252,662	113,261
Property and equipment, net	12,664	14,952
Contract acquisition costs, noncurrent	15,486	11,521
Intangible assets, net	4,569	3,026
Goodwill	9,478	9,478
Other assets	1,671	3,117
Total assets	296,530	155,355
Current liabilities:
Accounts payable	4,247	12,121
Accrued expenses and other current liabilities	46,603	49,428
Deferred revenue	72,862	66,712
Total current liabilities	123,712	128,261
Deferred revenue, noncurrent	3,207	4,244
Other liabilities, noncurrent	4,658	5,324
Long-term debt	98,094	46,332
Liabilities	229,671	184,161
Commitments and contingencies
Convertible preferred stock, $0.001 par value per share; 15,328 and no shares authorized as of January 31, 2018 and October 31, 2018, respectively; 14,099 and no shares issued and outstanding as of January 31, 2018 and October 31, 2018, respectively	0	693,158
Stockholders' (deficit) equity:
Preferred stock, $0.001 par value per share; no and 10,000 shares authorized as of January 31, 2018 and October 31, 2018, respectively; no shares issued and outstanding as of January 31, 2018 and October 31, 2018	0	0
Additional paid-in capital	948,686	35,301
Accumulated other comprehensive income	356	506
Accumulated deficit	(882,209)	(757,773)
Total stockholders' (deficit) equity	66,859	(721,964)
Total liabilities and stockholders' (deficit) equity	296,530	155,355
Class A Common Stock
Stockholders' (deficit) equity:
Common stock	3	0
Class B Common Stock
Stockholders' (deficit) equity:
Common stock	$ 23	$ 2

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Oct. 31, 2018	Jan. 31, 2018
Allowance for doubtful accounts receivable	$ 1,810	$ 2,919
Convertible preferred stock, par value (in usd per share)	$ 0.001	$ 0.001
Convertible preferred stock, shares authorized (shares)	0	15,328,000
Convertible preferred stock, shares issued (shares)	0	14,099,000
Convertible preferred stock, shares outstanding (shares)	0	14,098,937
Preferred stock par value (in usd per share) Share	$ 0.001	$ 0.001
Preferred stock authorized (shares)	10,000,000	0
Preferred stock issued (shares)	0	0
Preferred stock outstanding (shares)	0	0
Class A Common Stock
Common stock par value (usd per share)	$ 0.001	$ 0.001
Common stock authorized (shares)	3,700,000	3,700,000
Common stock issued (shares)	3,263,659	0
Common stock outstanding (shares)	3,263,659	0
Class B Common Stock
Common stock par value (usd per share)	$ 0.001	$ 0.001
Common stock authorized (shares)	500,000,000	21,200,000
Common stock issued (shares)	23,073,611	1,638,648
Common stock outstanding (shares)	23,074,189	1,638,648

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Revenues [Abstract]
Total revenue	$ 36,844	$ 28,302	$ 103,056	$ 78,451
Cost of Revenue [Abstract]
Total cost of revenue	12,927	12,394	37,011	32,785
Gross profit	23,917	15,908	66,045	45,666
Operating Expenses [Abstract]
Sales and marketing	28,034	33,552	101,692	100,482
Research and development	18,803	18,787	58,786	58,681
General and administrative	7,055	7,280	21,906	21,813
Total operating expenses	53,892	59,619	182,384	180,976
Loss from operations	(29,975)	(43,711)	(116,339)	(135,310)
Other (expense) income, net	(2,371)	(74)	(7,188)	251
Loss before income taxes	(32,346)	(43,785)	(123,527)	(135,059)
Provision for income taxes	199	99	909	296
Net loss	$ (32,545)	$ (43,884)	$ (124,436)	$ (135,355)
Net loss per share, basic and diluted (in usd per share)	$ (1.24)	$ (27.27)	$ (9.61)	$ (85.45)
Weighted-average number of shares used in computing net loss per share, basic and diluted (shares)	26,338	1,609	12,954	1,584
Subscription
Revenues [Abstract]
Total revenue	$ 30,398	$ 22,656	$ 85,227	$ 62,811
Cost of Revenue [Abstract]
Total cost of revenue	8,193	9,102	24,514	23,608
Professional services and other
Revenues [Abstract]
Total revenue	6,446	5,646	17,829	15,640
Cost of Revenue [Abstract]
Total cost of revenue	$ 4,734	$ 3,292	$ 12,497	$ 9,177

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (32,545)	$ (43,884)	$ (124,436)	$ (135,355)
Change in cumulative foreign currency translation adjustments	(58)	(15)	(150)	71
Comprehensive loss	$ (32,603)	$ (43,899)	$ (124,586)	$ (135,284)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders' (Deficit) Equity Statement - 9 months ended Oct. 31, 2018 - USD ($) $ in Thousands	Total	Class A Common Stock	Class B Common Stock	Common StockClass A Common Stock	Common StockClass B Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Accumulated Deficit
Convertible preferred stock, beginning balance (shares) at Jan. 31, 2018	14,098,937
Convertible preferred stock, beginning balance at Jan. 31, 2018	$ 693,158
Increase (Decrease) in Convertible Preferred Stock [Roll Forward]
Conversion of convertible preferred stock (shares)	(14,098,937)
Conversion of convertible preferred stock	$ (693,158)
Convertible preferred stock, ending balance (shares) at Oct. 31, 2018	0
Convertible preferred stock, ending balance at Oct. 31, 2018	$ 0
Stockholders (deficit) equity, beginning balance (shares) at Jan. 31, 2018		0	1,638,648	0
Stockholders (deficit) equity, beginning balance at Jan. 31, 2018	(721,964)			$ 0	$ 2	$ 35,301	$ 506	$ (757,773)
Increase (Decrease) in Stockholders' Equity (Deficit) [Roll Forward]
Initial public offering, net of offering costs (shares)					10,580,000
Initial public offering, net of offering costs of $4,091	202,536				$ 10	202,526
Conversion of convertible preferred stock (shares)				3,263,659	10,835,278
Conversion of convertible preferred stock	$ 693,158			$ 3	$ 11	693,144
Exercise of stock options (shares)	20,263			0	20,263
Exercise of stock options	$ 276					276
Stock-based compensation expense	17,313					17,313
Common stock warrants	126					126
Change in cumulative foreign currency translation adjustments	(150)						(150)
Net loss	(124,436)	$ (14,356)	$ (110,080)					(124,436)
Stockholders (deficit) equity, ending balance (shares) at Oct. 31, 2018		3,263,659	23,074,189
Stockholders (deficit) equity, ending balance at Oct. 31, 2018	$ 66,859			$ 3	$ 23	$ 948,686	$ 356	$ (882,209)

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders' (Deficit) Equity (Parenthetical) $ in Thousands	9 Months Ended
	Oct. 31, 2018USD ($)
Statement of Stockholders' Equity [Abstract]
Offering costs	$ 4,201

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Cash flows from operating activities
Net loss	$ (124,436)	$ (135,355)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	6,692	5,806
Amortization of intangible assets	60	60
Amortization of contract acquisition costs	5,750	6,655
Stock-based compensation	16,913	7,162
Reversal of contingent tax-related accrual	(3,513)	0
Capitalized interest	1,641	0
Remeasurement of warrant liability	(56)	0
Change in operating assets and liabilities:
Accounts receivable, net	5,679	(570)
Contract acquisition costs	(9,243)	(10,669)
Prepaid expenses and other	(1,747)	(641)
Accounts payable	(6,476)	2,525
Accrued expenses and other liabilities	(42)	3,500
Deferred revenue	5,113	5,691
Net cash used in operating activities	(103,665)	(115,836)
Cash flows from investing activities
Purchases of property and equipment	(4,673)	(5,091)
Cash flows from financing activities
Proceeds from initial public offering, net of underwriting discounts and commissions	206,627	0
Payments of costs related to initial public offering	(4,063)	0
Proceeds from issuance of convertible preferred stock, net of issuance costs	(87)	99,071
Debt proceeds, net of issuance costs		(50)
Debt proceeds, net of issuance costs	49,651
Proceeds from exercise of stock options	276	909
Repurchases of common stock	0	(121)
Principal payments on capital lease obligations	(44)	(27)
Net cash provided by financing activities	252,360	99,782
Effect of exchange rate changes on cash and cash equivalents	5	13
Net increase in cash and cash equivalents	144,027	(21,132)
Cash and cash equivalents at beginning of period	61,972	68,984
Cash and cash equivalents at end of period	205,999
Supplemental disclosures of cash flow information
Cash paid for income taxes	815	506
Cash paid for interest	4,747	22
Non-cash investing and financing activities
Purchases of intangible assets in accounts payable	1,603	0
Stock-based compensation capitalized as internal-use software	407	0
Issuance of warrants in connection with credit facility	$ 166	$ 0

Overview and Basis of Presentat

Overview and Basis of Presentation	9 Months Ended
	Oct. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Overview and Basis of Presentation	Overview and Basis of Presentation Description of Business and Basis of Presentation Domo, Inc. (the Company) provides a cloud-based platform that digitally connects everyone from the CEO to the frontline employee with all the people, data and systems in an organization, giving them access to real-time data and insights and allowing them to manage their business from their smartphones. The Company was originally incorporated in September 2010 under the corporate name Shacho, Inc. in Delaware and, in December 2011, the Company reincorporated in Delaware as Domo, Inc. The Company's headquarters are located in American Fork, Utah and the Company has subsidiaries in the United Kingdom, Australia, Japan, Hong Kong, Singapore, New Zealand, and Canada. The accompanying unaudited condensed consolidated financial statements, which include the accounts of the Company and its wholly owned subsidiaries, have been prepared in conformity with accounting principles generally accepted in the United States of America or GAAP. All intercompany balances and transactions have been eliminated in consolidation. The Company’s fiscal year ends on January 31. Unaudited Condensed Consolidated Financial Statements The accompanying condensed consolidated balance sheet as of October 31, 2018 , the condensed consolidated statements of operations and comprehensive loss for the three and nine months ended October 31, 2017 and 2018 , the condensed consolidated statement of convertible preferred stock and stockholders' (deficit) equity for the nine months ended October 31, 2018 and the condensed consolidated statements of cash flows for the nine months ended October 31, 2017 and 2018 are unaudited. The 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 necessary to state fairly the Company's financial position as of October 31, 2018 , its results of operations for the three and nine months ended October 31, 2017 and 2018 and its cash flows for the nine months ended October 31, 2017 and 2018 . The financial data and the other financial information disclosed in the notes to these condensed consolidated financial statements related to the three-month and nine -month periods are also unaudited. The results of operations for the three and nine months ended October 31, 2018 are not necessarily indicative of the results to be expected for the fiscal year ending January 31, 2019 or for any other future year or interim period. The unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the related notes thereto as of and for the year ended January 31, 2018, included in the Company's prospectus filed pursuant to Rule 424(b) under the Securities Act of 1933, as amended, on June 28, 2018, referred to as the Prospectus. Initial Public Offering On July 3, 2018, the Company closed its initial public offering (IPO), in which the Company issued and sold 10,580,000 shares (inclusive of the underwriters' over-allotment option to purchase 1,380,000 shares, which was exercised on June 29, 2018) of Class B common stock at $21.00 per share. The Company received aggregate proceeds of $206.6 million , net of underwriters' discounts and commissions, before deducting offering costs of $4.1 million . Immediately prior to the closing of the Company’s IPO, 14,098,937 shares of convertible preferred stock outstanding converted into 3,263,659 shares of Class A common stock and 10,835,278 shares of Class B common stock. Upon the effectiveness of the registration statement for the Company's IPO, which was June 28, 2018, the liquidity event-related performance vesting condition associated with the Company's restricted stock units (RSUs) was deemed probable of being satisfied. As a result, the Company recognized cumulative stock-based compensation related to its RSUs using the accelerated attribution method of $6.6 million attributable to service prior to such effective date. Stock Split On June 15, 2018, the Company amended its amended and restated certificate of incorporation to effect a 15-to-one reverse stock split of its common stock and convertible preferred stock. All of the share and per share information referenced throughout the condensed consolidated financial statements and notes to the condensed consolidated financial statements have been retroactively adjusted to reflect this reverse stock split. Use of Estimates The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make estimates, judgments and assumptions that affect the amounts reported in the condensed consolidated financial statements and the accompanying notes. The Company bases its estimates on historical experience and on other assumptions that its management believes are reasonable under the circumstances. Actual results could differ from those estimates. The Company’s estimates and judgments include the determination of standalone selling prices for the Company’s services, which are used to determine revenue recognition for arrangements with multiple performance obligations; the amortization period for deferred contract acquisition costs; valuation of the Company’s stock-based compensation, including the underlying estimated fair value of common stock in periods prior to the date of the Company's IPO; useful lives of fixed assets; capitalization and estimated useful life of internal-use software; valuation estimates used when evaluating impairment of long-lived and intangible assets including goodwill; and the allowance for doubtful accounts. Foreign Currency The functional currencies of the Company’s foreign subsidiaries are the respective local currencies. The cumulative effect of translation adjustments arising from the use of differing exchange rates from period to period is included in accumulated other comprehensive income within the condensed consolidated balance sheets. Changes in the cumulative foreign translation adjustment are reported in the condensed consolidated statements of convertible preferred stock and stockholders’ deficit and the condensed consolidated statements of comprehensive loss. Transactions denominated in currencies other than the functional currency are remeasured at the end of the period and when the related receivable or payable is settled, which may result in transaction gains or losses. Foreign currency transaction gains and losses are included in other income (expense), net in the condensed consolidated statements of operations and were not material for the three and nine months ended October 31, 2017 and 2018 . All assets and liabilities denominated in a foreign currency are translated into U.S. dollars at the exchange rate on the balance sheet date. Revenue and expenses are translated at the average exchange rate during the period, and equity balances are translated using historical exchange rates. Segment Information The Company operates as one operating segment. The Company’s chief operating decision maker is its chief executive officer, who reviews financial information presented on a consolidated basis for purposes of making operating decisions, assessing financial performance and allocating resources.

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Oct. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Cash and Cash Equivalents Cash and cash equivalents consist of cash on hand and money market funds. The fair value of cash equivalents approximated their carrying value as of January 31, 2018 and October 31, 2018 . Accounts Receivable and Allowance for Doubtful Accounts Accounts receivable are recorded at the invoiced amount (net of allowances), do not require collateral, and do not bear interest. The Company’s payment terms generally provide that customers pay within 30 days of the invoice date. The Company maintains an allowance for doubtful accounts for amounts the Company does not expect to collect. In establishing the required allowance, management considers historical losses, current market conditions, customers’ financial condition, the age of the receivables, and current payment patterns. Account balances are written off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote. Contract Acquisition Costs Contract acquisition costs primarily consist of deferred sales commissions, which are considered incremental and recoverable costs of obtaining a contract with a customer. Contract acquisition costs for initial contracts are deferred and then amortized on a straight-line basis over the period of benefit, which the Company has determined to be approximately four years . The period of benefit is determined by taking into consideration contractual terms, expected customer life, changes in the Company's technology and other factors. Contract acquisition costs for renewal contracts are not commensurate with contract acquisition costs for initial contracts and are recorded as expense when incurred if the period of benefit is one year or less. If the period of benefit is greater than one year, costs are deferred and then amortized on a straight-line basis over the period of benefit. Contract acquisition costs related to professional services and other performance obligations with a period of benefit of one year or less are recorded as expense when incurred. Amortization of contract acquisition costs is included in sales and marketing expenses in the accompanying condensed consolidated statements of operations. Amortization expense related to contract acquisition costs was $2.3 million and $2.1 million for the three months ended October 31, 2017 and 2018 , respectively, and $6.7 million and $5.8 million for the nine months ended October 31, 2017 and 2018 , respectively. There was no impairment charge in relation to contract acquisition costs for the periods presented. Deferred Offering Costs The Company capitalized qualified legal, accounting and other direct costs related to the IPO. As of January 31, 2018 , the balance of deferred offering costs was $1.7 million and included in other assets in the condensed consolidated balance sheets. During the three months ended July 31, 2018, the Company reclassified $4.2 million of offering costs into stockholders’ equity as a reduction of the net proceeds received from the IPO. Property and Equipment Property and equipment, net, are stated at cost less accumulated depreciation. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets or over the related lease terms (if shorter). Repairs and maintenance costs are expensed as incurred. The estimated useful lives of property and equipment are as follows: Computer equipment and software 2-3 years Furniture, vehicles and office equipment 3 years Leasehold improvements Shorter of remaining lease term or estimated useful life Capitalized Internal-Use Software Costs The Company capitalizes certain costs related to development of its platform incurred during the application development stage. Costs related to preliminary project activities and post-implementation activities are expensed as incurred. Maintenance and training costs are also expensed as incurred. Capitalized costs are included in property and equipment. Capitalized internal-use software is amortized as subscription cost of revenue on a straight-line basis over its estimated useful life, which is generally three years . Management evaluates the useful lives of these assets on an annual basis and tests for impairment whenever events or changes in circumstances occur that could impact the recoverability of these assets. Goodwill and Intangible Assets Goodwill represents the excess of the purchase price in a business combination over the fair value of net tangible and intangible assets acquired. Goodwill and indefinite-lived intangible assets are not amortized, but rather tested for impairment at least annually on November 1 or more often if and when circumstances indicate that the carrying value may not be recoverable. Finite-lived intangible assets are amortized over their useful lives. Goodwill is tested for impairment based on reporting units. The Company periodically reevaluates the business and has determined that it continues to operate in one segment, which is also considered the sole reporting unit. Therefore, goodwill is tested for impairment at the consolidated level. The Company reviews its long-lived assets, including property and equipment and finite-lived intangible assets, for impairment whenever an event or change in facts and circumstances indicates that their carrying amounts may not be recoverable. Recoverability of these assets is measured by comparing the carrying amount to the estimated undiscounted future cash flows expected to be generated. If the carrying amount exceeds the undiscounted cash flows, the assets are determined to be impaired and an impairment charge is recognized as the amount by which the carrying amount exceeds fair value. There was no goodwill acquired and no impairment charges for goodwill or long-lived assets recorded during the periods presented. Revenue Recognition The Company derives revenue primarily from subscriptions to its cloud-based platform and professional services. Revenue is recognized when control of these services is transferred to customers in an amount that reflects the consideration to which the Company expects to be entitled to in exchange for those services, net of sales taxes. For sales through channel partners, the Company considers the channel partner to be the end customer for the purposes of revenue recognition as the Company's contractual relationships with channel partners do not depend on the sale of the Company's services to their customers and payment from the channel partner is not contingent on receiving payment from their customers. The Company's contractual relationships with channel partners do not allow returns, rebates, or price concessions. The price of subscriptions is generally fixed at contract inception and therefore, the Company's contracts do not contain a significant amount of variable consideration. Revenue recognition is determined through the following steps: • Identification of the contract, or contracts, with a customer • Identification of the performance obligations in the contract • Determination of the transaction price • Allocation of the transaction price to the performance obligations in the contract • Recognition of revenue when, or as, performance obligations are satisfied Subscription Revenue Subscription revenue primarily consists of fees paid by customers to access the Company’s cloud-based platform, including support services. The Company's subscription agreements generally have annual contractual terms and a smaller percentage have multi-year contractual terms. Revenue is recognized ratably over the related contractual term beginning on the date that the platform is made available to a customer. Access to the platform represents a series of distinct services as the Company continually provides access to and fulfills its obligation to the end customer over the subscription term. The series of distinct services represents a single performance obligation that is satisfied over time. The Company recognizes revenue ratably because the customer receives and consumes the benefits of the platform throughout the contract period. The Company's contracts are generally non-cancelable. Professional Services and Other Revenue Professional services revenue consists of implementation services sold with new subscriptions as well as professional services sold separately. Other revenue includes training and education. Professional services arrangements are billed in advance, and revenue from these arrangements is recognized as the services are provided, generally based on hours incurred. Training and education revenue is also recognized as the services are provided. Contracts with Multiple Performance Obligations Most of the Company's contracts with new customers contain multiple performance obligations, generally consisting of subscriptions and professional services. For these contracts, individual performance obligations are accounted for separately if they are distinct. The transaction price is allocated to the separate performance obligations on a relative standalone selling price basis. Standalone selling prices are determined based on historical standalone selling prices, taking into consideration overall pricing objectives, market conditions and other factors, including contract value, customer demographics and the number and types of users within the contract. Deferred Revenue The Company's contracts are typically billed annually in advance. Deferred revenue includes amounts collected or billed in excess of revenue recognized. Deferred revenue is recognized as revenue as the related performance obligations are satisfied. Deferred revenue that will be recognized during the succeeding twelve-month period is recorded as a current liability and the remaining portion is recorded as a noncurrent liability. Cost of Revenue Cost of subscription revenue consists primarily of third-party hosting services and data center capacity; employee-related costs directly associated with cloud infrastructure and customer support personnel, including salaries, benefits, bonuses and stock-based compensation; amortization expense associated with capitalized software development costs; depreciation expense associated with computer equipment and software; certain fees paid to various third parties for the use of their technology and services; and allocated overhead. Allocated overhead includes items such as information technology infrastructure, rent, and employee benefit costs. Cost of professional services and other revenue consists primarily of employee-related costs associated with these services, including stock-based compensation; third-party consultant fees related to implementations; and allocated overhead. Advertising Costs Advertising costs are expensed as incurred. Advertising expense was $7.9 million and $1.7 million for the three months ended October 31, 2017 and 2018 , respectively, and $19.5 million and $12.1 million for the nine months ended October 31, 2017 and 2018 , respectively. Research and Development Research and development expenses consist primarily of employee-related costs for the design and development of the Company's platform, contractor costs to supplement staff levels, third-party web services, consulting services, and allocated overhead. Research and development expenses, other than software development costs qualifying for capitalization, are expensed as incurred. Stock-Based Compensation The Company records stock-based compensation based on the grant date fair value of the awards, which include stock options and restricted stock units, and recognizes the fair value of those awards as expense using the straight-line method over the requisite service period of the award. For restricted stock units that contain performance conditions, the Company recognizes expense using the accelerated attribution method. The Company estimates the grant date fair value of stock options using the Black-Scholes option-pricing model. Stock-based compensation expense related to purchase rights issued under the 2018 Employee Stock Purchase Plan (ESPP) is based on the Black-Scholes option-pricing model fair value of the estimated number of awards as of the beginning of the offering period. Stock-based compensation expense is recognized using the straight-line method over the offering period. The determination of the grant date fair value of stock-based awards is affected by the estimated fair value of the Company's common stock as well as other assumptions and judgments, which are estimated as follows: • Fair Value Per Share of Common Stock . Because there was no public market for the Company's common stock prior to the IPO, the board of directors determined the common stock fair value at the time of the grant of stock options by considering numerous objective and subjective factors, including contemporaneous valuations of the Company’s common stock, actual operating and financial performance, market conditions, and performance of comparable publicly traded companies, business developments, the likelihood of achieving a liquidity event, and transactions involving preferred and common stock, among other factors. Subsequent to the IPO, the Company determines the fair value of common stock as of each grant date using the market closing price of the Company's Class B common stock on the date of grant. • Expected Term . The expected term is determined using the simplified method, which is calculated as the midpoint of the option’s contractual term and vesting period. The Company uses this method due to limited stock option exercise history. For the ESPP, the Company uses the period from the beginning of the offering period to the end of each purchase period. • Expected Volatility . Since a public market for the Company's common stock did not exist prior to the IPO and, therefore, the Company does not have sufficient trading history of its common stock, expected volatility is estimated based on the volatility of similar publicly held companies over a period equivalent to the expected term of the awards. • Risk-free Interest Rate . The risk-free interest rate is determined using U.S. Treasury rates with a similar term as the expected term of the option. • Expected Dividend Yield . The Company has never declared or paid any cash dividends and does not presently plan to pay cash dividends in the foreseeable future. Consequently, the Company uses an expected dividend yield of zero. Income Taxes The Company accounts for income taxes in accordance with the liability method of accounting for income taxes. Under this method, the Company recognizes a liability or asset for the deferred income tax consequences of all temporary differences between the tax basis of assets and liabilities and their reported amounts in the condensed consolidated financial statements that will result in taxable or deductible amounts in future years when the reported amounts of the assets and liabilities are recovered or settled. These deferred income tax assets or liabilities are measured using the enacted tax rates that will be in effect when the differences are expected to affect taxable income. Valuation allowances are provided when it is more-likely-than-not that some or all of the deferred income tax assets may not be realized. In assessing the need for a valuation allowance, the Company has considered its historical levels of income, expectations of future taxable income and ongoing tax planning strategies. Because of the uncertainty of the realization of its deferred tax assets, the Company has a full valuation allowance for domestic net deferred tax assets, including net operating loss carryforwards, and tax credits related primarily to research and development. Realization of its deferred tax assets is dependent primarily upon future U.S. taxable income. Tax positions are recognized in the condensed consolidated financial statements when it is more-likely-than-not the position will be sustained upon examination by the tax authorities. The Company’s policy for recording interest and penalties related to income taxes, including uncertain tax positions, is to record such items as a component of the provision for income taxes. Concentrations of Risk and Significant Customers Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents and accounts receivable. The Company maintains its cash and cash equivalents in bank accounts, which at times may exceed federally insured limits. The Company has not experienced any losses in these instruments and believes it is not exposed to any significant risk with respect to cash and cash equivalents. No single customer accounted for more than 10% of revenue for the three and nine months ended October 31, 2017 and 2018 or more than 10% of accounts receivable as of January 31, 2018 and October 31, 2018 . The Company is primarily dependent upon third parties in order to meet the uptime and performance requirements of its customers. Any disruption of or interference with the Company's use of these third parties would impact operations. Net Loss per Share The Company computes net loss per share using the two-class method required for multiple classes of common stock and participating securities. The rights, including the liquidation and dividend rights, of the Class A common stock and Class B common stock are substantially identical, other than voting rights. Accordingly, the Class A common stock and Class B common stock share equally in the Company’s net losses. Before the IPO, the Company’s participating securities also included convertible preferred stock. The holders of convertible preferred stock did not have a contractual obligation to share in the Company’s losses, and as a result net losses were not allocated to these participating securities. Basic net loss per share is computed by dividing net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share is computed by dividing net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period increased by common shares that could be issued upon conversion or exercise of other outstanding securities to the extent those additional common shares would be dilutive. The dilutive effect of potentially dilutive securities is reflected in diluted net loss per share by application of the treasury stock method. During periods when the Company is in a net loss position, basic net loss per share is the same as diluted net loss per share as the effects of potentially dilutive securities are anti-dilutive. Recently Adopted Accounting Pronouncements ASU No. 2014-09 In May 2014, the Financial Accounting Standards Board or FASB issued Accounting Standards Update or ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). Topic 606 establishes a principle for recognizing revenue upon the transfer of promised goods or services to customers in an amount that reflects the considerations to which the entity expects to be entitled to in exchange for those goods or services. ASU No. 2014-09 also added Subtopic 340-40, Other Assets and Deferred Costs - Contracts with Customers , which requires the deferral of incremental costs of obtaining a contract with a customer. Topic 606 and Subtopic 340-40 are collectively referred to herein as the "new standard." The Company elected to early adopt the requirements of the new standard as of February 1, 2017 with an initial application date of February 1, 2016, utilizing the full retrospective method of transition. The primary impact of adopting the new standard is the deferral of incremental costs of obtaining subscription contracts. Prior to adopting the new standard, deferral of commissions was not required and the Company's policy was to expense commission costs as incurred. Under the new standard, all incremental costs to obtain the contract are deferred if the period of benefit is greater than one year. These costs are amortized on a straight-line basis over the period of benefit, the determination of which is discussed in the contract acquisition costs policy above. Recently Issued Accounting Pronouncements In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842), which requires lessees to record most leases on the balance sheet and recognize the expenses on the income statement in a manner similar to current practice. ASU 2016-02 states that a lessee would recognize a lease liability for the obligation to make lease payments and a right-to-use asset for the right to use the underlying asset for the lease term. For public entities, the new standard is effective for fiscal years beginning after December 15, 2018 and interim periods within that reporting period. For all other entities, this standard is effective for annual reporting periods beginning after December 15, 2019 and interim periods within annual periods beginning after December 15, 2020. Early adoption is permitted. The Company expects to adopt this standard as of February 1, 2020, assuming it remains an emerging growth company. The Company is currently evaluating the impact to its condensed consolidated financial statements and related disclosures, but expects assets and liabilities related to leases to increase as a result of adopting this standard.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Oct. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Assets Measured at Fair Value on a Recurring Basis Financial instruments recorded at fair value in the financial statements are categorized as follows: • Level 1: Observable inputs that reflect quoted prices for identical assets or liabilities in active markets. • Level 2: Observable inputs, other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. • Level 3: Unobservable inputs reflecting management's assumptions incorporated in valuation techniques used to determine fair value. These assumptions are required to be consistent with market participant assumptions that are reasonably available. The following table summarizes the assets measured at fair value on a recurring basis as of January 31, 2018 and October 31, 2018 by level within the fair value hierarchy (in thousands): January 31, 2018 Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 15,210 $ — $ — $ 15,210 Financial liability: Series D-2 convertible preferred stock warrants $ — $ — $ 229 $ 229 October 31, 2018 Level 1 Level 2 Level 3 Total (unaudited) Cash equivalents: Money market funds $ 200,913 $ — $ — $ 200,913 There were no realized or unrealized losses or other-than-temporary impairments for money market funds as of January 31, 2018 and October 31, 2018 . Level 3 instruments consist of a Series D-2 convertible preferred stock warrant liability (see Note 9) and a Class B common stock warrant liability (see Note 11) (warrant liabilities). These warrant liabilities were estimated using assumptions related to the remaining contractual term of the warrants, the risk-free interest rate, the volatility of comparable public companies over the remaining term and the fair value of underlying shares. The significant unobservable inputs used in the fair value measurement of the warrant liabilities are the fair value of the underlying stock at the valuation date and the estimated term of the warrants. Generally, increases (decreases) in the fair value of the underlying stock and estimated term would result in a directionally similar impact to the fair value measurement, and are recognized in other income (expense), net in the condensed consolidated statements of operations. The changes in the fair value of the Series D-2 convertible preferred stock and Class B common stock warrant liabilities were as follows (in thousands): Balance as of January 31, 2018 $ 229 Decrease in fair value of convertible preferred stock warrants (16 ) Write-off of convertible preferred stock warrant liability due to conversion to warrants on Class B common stock (213 ) Issuance of Class B common stock warrants 166 Decrease in fair value of Class B common stock warrants (40 ) Reclassification to additional paid-in capital of Class B common stock warrant liability due to resolution of contingency (126 ) Balance as of October 31, 2018 $ — The Class B common stock warrant liability was recorded at fair value upon issuance in April 2018 and remeasured on the date the contingency was resolved, which was the effective date of the Company's IPO. The remaining liability balance was then reclassified to additional paid-in capital within stockholders' equity. At each reporting date or immediately prior to an event that changes the classification of the related warrants from liability to equity, the warrant liabilities are remeasured to fair value using the Black-Scholes option-pricing model. The assumptions used as of January 31, 2018 and during the nine months ended October 31, 2018 were as follows: January 31, October 31, 2018 2018 Expected stock price volatility 45% 42% - 44% Expected term 2.6 years 2.6 - 3.0 years Risk-free interest rate 2.72% 2.54% - 2.60% Expected dividend yield — — During the three and nine months ended October 31, 2017 and 2018 , the Company had no transfers between levels of the fair value hierarchy of its assets and liabilities measured at fair value. Fair Value of Other Financial Instruments The carrying amounts of certain financial instruments, including cash held in banks, accounts receivable, accounts payable, accrued liabilities, and other liabilities approximate fair value due to their short-term maturities and are excluded from the fair value tables above.

Property and Equipment

Property and Equipment	9 Months Ended
	Oct. 31, 2018
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment Property and equipment, net consisted of the following (in thousands): As of January 31, As of October 31, 2018 2018 Computer equipment and software $ 16,201 $ 16,522 Capitalized internal-use software development costs 11,823 16,371 Leasehold improvements 3,558 2,849 Furniture, vehicles and office equipment 2,430 2,536 34,012 38,278 Less accumulated depreciation and amortization (19,060 ) (25,614 ) $ 14,952 $ 12,664 Depreciation and amortization expense related to property and equipment was $2.0 million and $2.2 million for the three months ended October 31, 2017 and 2018 , respectively, and $5.8 million and $6.7 million for the nine months ended October 31, 2017 and 2018 , respectively. The Company capitalized $0.6 million and $1.6 million in software development costs during the three months ended October 31, 2017 and 2018 , respectively, and $1.8 million and $4.5 million during the nine months ended October 31, 2017 and 2018 , respectively. Amortization of capitalized software development costs was $0.8 million and $1.0 million for the three months ended October 31, 2017 and 2018 , respectively, and $2.3 million and $2.9 million for the nine months ended October 31, 2017 and 2018 , respectively.

Intangible Assets

Intangible Assets	9 Months Ended
	Oct. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible Assets Intangible assets consisted of the following (in thousands): As of January 31, As of October 31, 2018 2018 Intellectual property excluding patents $ 2,289 $ 2,289 Software licenses — 1,603 Patents 950 950 3,239 4,842 Less accumulated amortization (213 ) (273 ) $ 3,026 $ 4,569 Amortization expense related to intangible assets was $20,000 and $20,000 for the three months ended October 31, 2017 and 2018 , respectively, and $60,000 and $60,000 for the nine months ended October 31, 2017 and 2018 , respectively. Intellectual property excluding patents is considered an indefinite-lived asset due to the fact that it is renewable in perpetuity. Software licenses are amortized over an estimated useful life of three years. The patents were acquired and are being amortized over a weighted-average remaining useful life of approximately 11 years.

Accrued Expenses and Other Curr

Accrued Expenses and Other Current Liabilities	9 Months Ended
	Oct. 31, 2018
Payables and Accruals [Abstract]
Accrued Expenses and Other Current Liabilities	Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consisted of the following (in thousands): As of January 31, As of October 31, 2018 2018 Accrued payroll taxes $ 13,925 $ 11,426 Accrued expenses 11,677 11,347 Accrued bonus 7,200 6,912 Accrued benefits 6,005 6,342 Accrued commissions 6,120 4,370 Employee stock purchase plan liability — 2,102 Sales and other taxes payable 966 1,239 Other accrued liabilities 3,535 2,865 $ 49,428 $ 46,603

Deferred Revenue and Performanc

Deferred Revenue and Performance Obligations	9 Months Ended
	Oct. 31, 2018
Revenue from Contract with Customer [Abstract]
Deferred Revenue and Performance Obligations	Deferred Revenue and Performance Obligations Deferred Revenue Significant changes in the Company's deferred revenue balance for the nine months ended October 31, 2018 were as follows (in thousands): Balance as of January 31, 2018 $ 70,956 Revenue recognized that was included in the deferred revenue balance at the beginning of the period: Subscription $ (44,126 ) Professional services and other (3,840 ) Total (47,966 ) Increase due to billings excluding amounts recognized as revenue during the period 53,079 Balance as of October 31, 2018 $ 76,069 Transaction Price Allocated to Remaining Performance Obligations As of October 31, 2018 , approximately $150.8 million of revenue was expected to be recognized from remaining performance obligations for subscription contracts. The Company expects to recognize approximately $30.8 million of this amount during the year ending January 31, 2019, with an additional $72.6 million being recognized during the year ending January 31, 2020, and the balance recognized thereafter. As of October 31, 2018 , approximately $13.7 million of revenue was expected to be recognized from remaining performance obligations for professional services and other contracts, $4.3 million of which is expected to be recognized during the year ending January 31, 2019, and the balance recognized thereafter. Geographic Information Revenue by geographic area is determined by the billing address of the customer. The following table sets forth revenue by geographic area (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2017 2018 2017 2018 United States $ 23,259 $ 28,232 $ 65,061 $ 79,715 Outside the United States 5,043 8,612 13,390 23,341 Total $ 28,302 $ 36,844 $ 78,451 $ 103,056 Percentage of revenue by geographic area: United States 82 % 77 % 83 % 77 % Outside the United States 18 % 23 % 17 % 23 % Other than the United States, no other individual country exceeded 10% of total revenue for the three and nine months ended October 31, 2017 and 2018 . As of October 31, 2018 , substantially all of the Company’s property and equipment was located in the United States.

Geographic Information

Geographic Information	9 Months Ended
	Oct. 31, 2018
Revenue from Contract with Customer [Abstract]
Geographic Information	Deferred Revenue and Performance Obligations Deferred Revenue Significant changes in the Company's deferred revenue balance for the nine months ended October 31, 2018 were as follows (in thousands): Balance as of January 31, 2018 $ 70,956 Revenue recognized that was included in the deferred revenue balance at the beginning of the period: Subscription $ (44,126 ) Professional services and other (3,840 ) Total (47,966 ) Increase due to billings excluding amounts recognized as revenue during the period 53,079 Balance as of October 31, 2018 $ 76,069 Transaction Price Allocated to Remaining Performance Obligations As of October 31, 2018 , approximately $150.8 million of revenue was expected to be recognized from remaining performance obligations for subscription contracts. The Company expects to recognize approximately $30.8 million of this amount during the year ending January 31, 2019, with an additional $72.6 million being recognized during the year ending January 31, 2020, and the balance recognized thereafter. As of October 31, 2018 , approximately $13.7 million of revenue was expected to be recognized from remaining performance obligations for professional services and other contracts, $4.3 million of which is expected to be recognized during the year ending January 31, 2019, and the balance recognized thereafter. Geographic Information Revenue by geographic area is determined by the billing address of the customer. The following table sets forth revenue by geographic area (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2017 2018 2017 2018 United States $ 23,259 $ 28,232 $ 65,061 $ 79,715 Outside the United States 5,043 8,612 13,390 23,341 Total $ 28,302 $ 36,844 $ 78,451 $ 103,056 Percentage of revenue by geographic area: United States 82 % 77 % 83 % 77 % Outside the United States 18 % 23 % 17 % 23 % Other than the United States, no other individual country exceeded 10% of total revenue for the three and nine months ended October 31, 2017 and 2018 . As of October 31, 2018 , substantially all of the Company’s property and equipment was located in the United States.

Line of Credit and Credit Facil

Line of Credit and Credit Facility	9 Months Ended
	Oct. 31, 2018
Debt Disclosure [Abstract]
Line of Credit and Credit Facility	Line of Credit and Credit Facility Line of Credit In July 2016, the Company entered into a two -year secured line of credit that allowed for borrowings up to $20.0 million to fund working capital and general corporate purposes with interest payable on the borrowed amounts at a floating rate equal to the prime rate plus 0.75% . The line of credit was secured by the assets of the Company, excluding intellectual property. The Company was required to pay an annual commitment fee of $50,000 and a fee of 0.25% per year (payable quarterly) on the unused portion of the facility. Origination fees were amortized over the term of the facility as interest expense. Any amounts outstanding under this facility were originally scheduled to be due and payable on July 18, 2018; however, in November 2017 the line of credit was canceled in conjunction with the Company entering into a new credit facility with a different lender. This credit facility is described in further detail below. The Company did no t make any draws on the line of credit during the term of the agreement. Credit Facility In December 2017, the Company entered into an $80.0 million credit facility and drew $50.0 million at closing, which matures on January 1, 2021. The Company had until April 30, 2018 to request an additional term loan of up to $30.0 million under the credit facility. In April 2018, the Company entered into an amendment to this credit facility pursuant to which the Company was able to incur an additional $20.0 million in term loan borrowings, for a total availability of $100.0 million under the amended facility. The Company drew the remaining $50.0 million during April 2018, which matures on May 1, 2021. The credit facility is secured by substantially all of the Company's assets. Each term loan under the credit facility requires interest-only payments until such term loan matures on the first business day of the 37th full month after the date of the credit advance. A portion of the interest that accrues on the outstanding principal of each term loan is payable in cash on a monthly basis, which portion accrues at a floating rate equal to the greater of (1) 7% and (2) three-month LIBOR plus 5.5% per year. This interest rate was approximately 7.9% as of October 31, 2018 . In addition, a portion of the interest that accrues on the outstanding principal of each term loan is capitalized and added to the principal amount of the outstanding term loan on a monthly basis, which portion accrues at a fixed rate equal to 2.5% per year. There were no amounts capitalized during the three and nine months ended October 31, 2017 , and $0.6 million and $1.6 million of interest was capitalized during the three and nine months ended October 31, 2018 , respectively. The original credit facility also required a closing fee of $3.6 million to be paid in full on January 1, 2021. The amendment increased the closing fee payable by the Company from $3.6 million to $4.5 million , 50% of which will be paid on January 1, 2021 and the remaining 50% on May 1, 2021. Due to the long-term nature of the $4.5 million closing fee, it was recorded at present value as an increase to other liabilities, noncurrent and an increase to debt issuance costs. The present value was determined using the effective interest rate of each $50.0 million term loan. The closing fee liability will be accreted to its full value over the term of the respective term loan, with such accretion recorded as interest expense in other income (expense), net in the condensed consolidated statements of operations. As of January 31, 2018 , the Company had incurred other upfront issuance fees of $1.2 million , with an additional $0.2 million incurred during the nine months ended October 31, 2018 , which were also recorded as debt issuance costs. Debt issuance costs are presented as an offset to the outstanding principal balance of the term loans on the condensed consolidated balance sheets and are being amortized as interest expense in other income (expense), net in the condensed consolidated statements of operations over the term of the respective term loan using the effective interest rate method. The $100.0 million credit facility as amended contains customary conditions to borrowing, events of default and covenants, including covenants that restrict the Company's ability to dispose of assets, make material changes to the nature, control or location of the business, merge with or acquire other entities, incur indebtedness or encumbrances, make distributions to holders of the Company's capital stock, make investments or enter into transactions with affiliates. In addition, the Company is required to comply with a financial covenant based on the ratio of outstanding indebtedness to annualized recurring revenue. The April 2018 amendment revised the financial covenant regarding the ratio of the Company’s outstanding indebtedness to its annualized recurring revenue. Under the amended facility, the minimum ratio is 1.0 on January 31, 2018 and April 30, 2018; 0.95 on July 31, 2018 and October 31, 2018; 0.90 on January 31, 2019 and April 30, 2019; 0.85 on July 31, 2019 and October 31, 2019; and 0.80 on January 31, 2020 through the maturity date. The credit facility defines annualized recurring revenue as four times the Company's aggregate revenue for the immediately preceding quarter (net of recurring discounts and discounts for periods greater than one year ) less the annual contract value of any customer contracts pursuant to which the Company was advised during such quarter would not be renewed at the end of the current term plus annual contract value of existing customer contract increases during such quarter. This covenant is measured quarterly on a three -month trailing basis. Upon the occurrence of an event of default, such as non-compliance with covenants, any outstanding principal, interest and fees become due immediately. The Company was in compliance with the covenant terms of the credit facility at January 31, 2018 and October 31, 2018 . Under the amended credit facility, the Company is required to pay a $2.0 million fee upon the earlier of (1) the closing of a transaction in which the Company is acquired by a third party and (2) December 4, 2027. The obligation to pay this $2.0 million fee terminated upon the closing of the IPO. The Company incurred interest expense of $43,000 and $3.1 million for the three months ended October 31, 2017 and 2018 , respectively, and $0.1 million and $7.9 million for the nine months ended October 31, 2017 and 2018 , respectively. Series D-2 Convertible Preferred Stock Warrants In connection with the $80.0 million credit facility described above, in December 2017 the Company issued fully vested warrants to purchase 28,462 shares of Series D-2 convertible preferred stock (Series D-2 warrants) with an exercise price of $126.47 per share, which warrants are exercisable at any time prior to expiration, which was to occur on the earlier of the third anniversary of an IPO or December 2027. The fair value of the Series D-2 warrants at the time of issuance was $0.3 million and was recorded as an increase to debt issuance costs and will be amortized as interest expense over the term of the credit facility using the effective interest rate method. The Series D-2 warrants to purchase convertible preferred stock were accounted for as a liability award and recorded at fair value on the initial issuance date and were adjusted to fair value at each reporting period, with the change in fair value being recorded as interest expense in other income (expense), net in the condensed consolidated statements of operations. As of January 31, 2018, the fair value of the warrants was $0.2 million and was included in other liabilities, noncurrent on the accompanying condensed consolidated balance sheets. In connection with the April 2018 amendment to the credit facility, the warrants to purchase 28,462 shares of Series D-2 convertible preferred stock were amended to warrants to purchase 66,664 shares of Class B common stock (see Note 11 for further details). Upon execution of the amendment, the convertible preferred stock warrant liability was adjusted to fair value and the remaining balance was written off against the related debt issuance costs.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Oct. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Litigation Liabilities for loss contingencies arising from claims, assessments, litigation, fines, and penalties and other sources are recorded when it is probable that a liability has been incurred and the amount can be reasonably estimated. Legal costs incurred in connection with loss contingencies are expensed as incurred. The Company is involved in legal proceedings from time to time arising in the normal course of business. As of January 31, 2018 and October 31, 2018 , there were no significant outstanding claims against the Company. Warranties and Indemnification The Company’s subscription services are generally warranted to perform materially in accordance with the terms of the applicable customer service order under normal use and circumstances. Additionally, the Company’s arrangements generally include provisions for indemnifying customers against liabilities if its subscription services infringe a third party’s intellectual property rights. Furthermore, the Company may also incur liabilities if it breaches the security or confidentiality obligations in its arrangements. To date, the Company has not incurred significant costs and has not accrued a liability in the accompanying condensed consolidated financial statements as a result of these obligations. The Company has entered into service-level agreements with some of its customers defining levels of uptime reliability and performance and permitting those customers to receive credits for prepaid amounts related to unused subscription services if the Company fails to meet certain of the defined service levels. In very limited instances, the Company allows customers to early terminate their agreements if the Company repeatedly or significantly fails to meet those levels. If the Company repeatedly or significantly fails to meet contracted upon service levels, a contract may require a refund of prepaid unused subscription fees. To date, the Company has not experienced any significant failures to meet defined levels of uptime reliability and performance as set forth in its agreements and, as a result, the Company has not accrued any liabilities related to these agreements in the condensed consolidated financial statements. Operating Leases The Company has entered into noncancelable operating lease arrangements primarily for office space with various expiration dates through 2027. Certain of the leases include periods of free rent beginning with the lease effective date and increasing rental rates over the term of the leases. The Company recognizes rent expense on a straight-line basis over the lease period and has accrued for rent expense incurred but not paid. Rent expense under operating leases totaled $1.5 million and $1.9 million for the three months ended October 31, 2017 and 2018 , respectively, and $3.8 million and $5.1 million for the nine months ended October 31, 2017 and 2018 , respectively. There have been no material changes in future minimum lease payments under noncancelable operating leases as disclosed in the Prospectus. Other Purchase Commitments The Company has also entered into certain noncancelable contractual commitments related to cloud infrastructure services in the ordinary course of business. There have been no material changes in these commitments as disclosed in the Prospectus.

Stockholders' (Deficit) Equity

Stockholders' (Deficit) Equity	9 Months Ended
	Oct. 31, 2018
Equity [Abstract]
Stockholders' (Deficit) Equity	Stockholders' (Deficit) Equity Convertible Preferred Stock The Company previously issued several series of convertible preferred stock, each with such designations, rights, qualifications, limitations, and restrictions as set forth in the Company’s certificate of incorporation, as in effect prior to the IPO. Immediately prior to the completion of the IPO, as described in Note 1, all shares of convertible preferred stock then outstanding were automatically converted into 3,263,659 shares of Class A common stock and 10,835,278 shares of Class B common stock. Preferred Stock The Company's Board of Directors has the authority, without further action by the Company's stockholders, to issue up to 10,000,000 shares of preferred stock in one or more series and to fix the rights, preferences, and privileges thereof, including voting rights. As of January 31, 2018 and October 31, 2018 , no shares of preferred stock were issued and outstanding. Common Stock The Company has two classes of common stock, Class A and Class B. Each share of Class A common stock is entitled to 40 votes per share and is convertible at any time into one share of Class B common stock. Each share of Class A common stock will convert automatically into one share of Class B common stock upon any transfer, whether or not for value. Each share of Class B common stock is entitled to one vote per share. Holders of Class A common stock and Class B common stock vote together as a single class on all matters (including the election of directors) submitted to a vote of stockholders, unless otherwise required by law or the Company's certificate of incorporation. Subject to preferences that may be applicable to any then-outstanding preferred stock, holders of Class A common stock and Class B common stock are entitled to receive dividends, if any, as may be declared by the Company's board of directors. At January 31, 2018 and October 31, 2018 , there were 3,700,000 shares of Class A common stock authorized. There were no shares of Class A common stock issued and outstanding at January 31, 2018 and 3,263,659 shares of Class A common stock issued and outstanding at October 31, 2018 . At January 31, 2018 and October 31, 2018 , there were 21,200,000 and 500,000,000 shares of Class B common stock authorized, respectively, and 1,638,648 and 23,074,189 shares of Class B common stock issued and outstanding, respectively. Class B Common Stock Warrants In connection with the amendment to the credit facility that occurred in April 2018, the warrants to purchase 28,462 shares of Series D-2 convertible preferred stock described in Note 9 were amended to warrants to purchase 66,664 shares of Class B common stock at an exercise price equal to $45.00 per share. The warrants are exercisable at any time prior to expiration, which occurs on the earlier of the third anniversary of the IPO or December 2027. Due to the exercise price-related contingency that existed with these warrants, the fair value upon issuance was recorded as an increase to other liabilities, noncurrent and debt issuance costs and is being amortized over the term of the credit facility as interest expense. The liability was revalued each reporting period until the contingency was resolved and the change in fair value was recorded in other income (expense), net. The contingency was resolved on the effective date of the Company's IPO, at which time the liability was remeasured to fair value and the remaining liability balance was reclassified to additional paid-in capital within stockholders' equity. In connection with the line of credit signed in July 2016, the Company issued a warrant to purchase 3,333 shares of Class B common stock with a strike price of $34.35 per share. The warrant expires ten years from the date of issuance. In connection with a loan signed in November 2011 and for which the last principal payment was made in September 2015, the Company issued a warrant to purchase 3,729 shares of Class B common stock with a strike price of $4.80 per share. The warrant expires ten years from the date of issuance. At January 31, 2018 and October 31, 2018 , all warrants were outstanding and exercisable.

Equity Incentive Plans

Equity Incentive Plans	9 Months Ended
	Oct. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity Incentive Plans	Equity Incentive Plans In April 2011, Domo established the 2011 Equity Incentive Plan (2011 Plan), which was amended in September 2011 to provide for the issuance of stock options and other stock-based awards. In June 2018, the Company adopted the 2018 Equity Incentive Plan (2018 Plan). The 2018 Plan provides for the grant of incentive and nonstatutory stock options, restricted stock, RSUs, stock appreciation rights, performance units, and performance shares to employees, consultants, and members of the Company's board of directors. A total of 5,238,423 shares of Class B common stock are reserved for issuance under the 2018 Plan. The number of shares available for issuance under the 2018 Plan also includes an annual increase on the first day of each fiscal year beginning in 2019, equal to the least of: (1) 3,500,000 shares; (2) 5% of the outstanding shares of Class A and Class B common stock as of the last day of the immediately preceding fiscal year; and ( 3) such other amount as the Company's board of directors may determine no later than the last day of the immediately preceding year . In connection with the IPO, the 2011 Plan was terminated. With the establishment of the 2018 Plan, the Company no longer grants equity-based awards under the 2011 Plan and any shares that expire, terminate, are forfeited or repurchased by the Company, or are withheld by the Company to cover tax withholding obligations, under the 2011 Plan, will become available for future grant under the 2018 Plan. As of October 31, 2018 , there were 5,497,474 shares available for grant under the 2018 Plan. The Company recognized stock-based compensation expense related to its equity incentive plans as follows (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2017 2018 2017 2018 Cost of revenue: Subscription $ 13 $ 74 $ 36 $ 144 Professional services and other 10 34 31 112 Sales and marketing 453 1,441 1,505 5,490 Research and development 628 1,630 1,745 5,106 General and administrative 1,273 1,461 3,820 6,056 Interest expense 8 14 25 5 Total $ 2,385 $ 4,654 $ 7,162 $ 16,913 Stock Options Stock options typically vest over a four year period and have a term of ten years from the date of grant. The weighted-average grant-date fair value of stock options granted was $13.20 per share for the three and nine months ended October 31, 2017 . No stock options were granted during the three and nine months ended October 31, 2018 . The grant-date fair value of stock options was estimated using the Black-Scholes option-pricing model with the following weighted-average assumptions: Expected stock price volatility 47 % Expected life of options 6 years Risk-free interest rate 1.83 % Expected dividend yield — Fair value of common stock $28.20 The following table sets forth the outstanding common stock options and related activity for the nine months ended October 31, 2018 : Shares Subject to Outstanding Options Weighted- Average Exercise Price per Share Weighted-Average Remaining Contractual Term (years) Aggregate Intrinsic Value (in thousands) Balance at January 31, 2018 2,465,242 $ 21.90 6.4 $ 12,185 Exercised (20,263 ) 13.13 Forfeited (93,454 ) 30.81 Expired (117,001 ) 35.10 Balance at October 31, 2018 2,234,524 $ 20.92 5.0 $ 7,058 Vested and exercisable at October 31, 2018 2,046,000 $ 20.15 4.7 $ 7,058 The aggregate intrinsic value of options exercised was $532,000 and $8,000 for the three months ended October 31, 2017 and 2018 , respectively, and $2.5 million and $0.2 million for the nine months ended October 31, 2017 and 2018 , respectively. The intrinsic value represents the excess of the estimated fair value of the Company's common stock on the date of exercise over the exercise price of each option. The intrinsic value of vested options as of October 31, 2018 is based on the market closing price of the Company's Class B common stock on that date. As of October 31, 2018 , there was $2.3 million of unrecognized stock-based compensation expense related to outstanding stock options which is expected to be recognized over a weighted-average period of 1.3 years. Restricted Stock Units Restricted stock units (RSUs) granted under the Plan vest and settle upon the satisfaction of both a service-based condition and a liquidity event-related performance vesting condition. The service-based condition for these awards is generally satisfied over three or four years with a cliff vesting period of one or two years and quarterly vesting thereafter. Upon the effectiveness of the registration statement for the Company's IPO, which was June 28, 2018, the liquidity event-related performance vesting condition associated with the Company's RSUs was deemed probable of being satisfied. As a result, the Company recognized cumulative unrecognized stock-based compensation related to its RSUs using the accelerated attribution method of $6.6 million attributable to service prior to such effective date. The following table sets forth the outstanding RSUs and related activity for the nine months ended October 31, 2018 : Number of Shares Weighted- Average Grant Date Fair Value Outstanding as of January 31, 2018 1,001,226 $ 23.40 Granted 428,338 22.76 Canceled (149,880 ) 23.40 Outstanding as of October 31, 2018 1,279,684 $ 23.23 As of October 31, 2018 , there was $18.0 million of unrecognized stock-based compensation expense related to outstanding RSUs which is expected to be recognized over a weighted-average period of 1.8 years. Employee Stock Purchase Plan In June 2018, the Company's board of directors adopted the ESPP and a total of 1,047,684 shares of Class B common stock were initially reserved for issuance under the ESPP. The number of shares of Class B common stock available for issuance under the ESPP will be increased on the first day of each fiscal year beginning in 2019 equal to the least of: (1) 1,050,000 shares of Class B common stock, (2) 1.5% of the outstanding shares of Class A and Class B common stock of the Company on the last day of the immediately preceding fiscal year, and (3) such other amount as the administrator of the ESPP may determine on or before the last day of the immediately preceding year . The ESPP generally provides for consecutive overlapping 24 -month offering periods comprised of four six -month purchase periods; provided, however, that the first purchase period in the first offering period will have a duration of approximately nine months . The offering periods are scheduled to start on the first trading day on or after April 1 and October 1 of each year. The first offering period commenced on June 29, 2018 and is scheduled to end on the first trading day on or after October 1, 2020. The ESPP permits participants to elect to purchase shares of Class B common stock through through payroll deductions of up to 15% of their eligible compensation or $25,000 per calendar year. A participant may purchase a maximum of 2,000 shares during each purchase period. Amounts deducted and accumulated by the participant will be used to purchase shares of Class B common stock at the end of each purchase period. The purchase price of the shares will be 85% of the lower of the fair market value of Class B common stock on the first trading day of each offering period or the fair market value of Class B common stock on the applicable exercise date . If the fair market value of a share of Class B common stock on the exercise date of an offering period is less than it was on the first trading day of that offering period, participants automatically will be withdrawn from that offering period following their purchase of shares on the exercise date and will be re-enrolled in a new offering period. Participants may end their participation at any time during an offering period and will be paid their accrued contributions that have not yet been used to purchase shares of Class B common stock. Participation ends automatically upon termination of employment. As of October 31, 2018 , a total of 887,081 shares were issuable to employees based on contribution elections made under the ESPP and no shares had yet been purchased. As of October 31, 2018 , total unrecognized stock-based compensation related to the ESPP was $5.0 million , which is expected to be recognized over a weighted-average period of 1.9 years . The fair value of the purchase rights for the ESPP are estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions: Expected stock price volatility 31% - 36% Expected term 0.75 - 2.25 years Risk-free interest rate 2.22% - 2.54% Expected dividend yield –

Income Taxes

Income Taxes	9 Months Ended
	Oct. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company calculated the year-to-date income tax provision by applying the estimated annual effective tax rate to the year-to-date pre-tax loss and adjusted for discrete tax items in the period. The Company's income tax expense was $0.1 million and $0.2 million for the three months ended October 31, 2017 and 2018 , respectively, and $0.3 million and $0.9 million for the nine months ended October 31, 2017 and 2018 , respectively. The income tax expense for these periods was primarily attributable to foreign taxes. For the periods presented, the difference between the U.S. statutory rate and the Company's effective tax rate is primarily due to the full valuation allowance on its U.S. tax assets. The effective tax rate is also impacted by earnings realized in foreign jurisdictions with statutory tax rates lower than the federal statutory tax rate. In December 2017, the Tax Cuts and Jobs Act (Tax Act) was enacted, which resulted in widespread changes to the U.S. tax code. One such change was establishing a flat corporate income tax rate of 21% to replace previous rates that ranged from 15% to 35% . As a result, the Company remeasured its U.S. deferred tax assets and liabilities as of January 31, 2018 to reflect the lower rate expected to apply when these temporary differences reverse. The remeasurement resulted in a provisional reduction in deferred tax assets, which was fully offset by a corresponding change to the Company’s valuation allowance. The impact will likely be subject to ongoing technical guidance and accounting interpretation, which the Company will continue to monitor and assess. There have not been material changes to the provisional amounts recorded related to the Tax Act as of October 31, 2018 . The Tax Act contains a number of additional provisions which may impact the Company in future years. However, since the Tax Act was recently finalized and ongoing guidance and accounting interpretation is expected to continue to be released, the Company has not yet elected any changes to accounting policies and the Company’s analysis is ongoing. Provisional accounting impacts may change in future reporting periods until the accounting analysis is finalized, which will occur no later than one year from the date the Tax Act was enacted.

Net Loss Per Share

Net Loss Per Share	9 Months Ended
	Oct. 31, 2018
Earnings Per Share [Abstract]
Net Loss Per Share	Net Loss Per Share The Company computes net loss per share using the two-class method required for multiple classes of common stock and participating securities. The rights, including the liquidation and dividend rights, of the Class A common stock and Class B common stock are substantially identical, other than voting rights. Accordingly, the Class A common stock and Class B common stock share equally in the Company’s net losses. Before the IPO, the Company’s participating securities also included convertible preferred stock. The holders of convertible preferred stock did not have a contractual obligation to share in the Company’s losses, and as a result net losses were not allocated to these participating securities. The following tables set forth the calculation of basic and diluted net loss per share during the periods presented. The shares issued in the IPO and the shares of Class A and Class B common stock issued upon conversion of the outstanding shares of convertible preferred stock in the IPO are included in the table below weighted for the period outstanding in the three and nine months ended October 31, 2017 and 2018 (in thousands, except per share amounts): Three Months Ended October 31, 2017 2018 Class A Class B Class A Class B Numerator: Net loss $ — $ (43,884 ) $ (4,033 ) $ (28,512 ) Denominator: Weighted-average number of shares used in — 1,609 3,264 23,074 Net loss per share, basic and diluted $ — $ (27.27 ) $ (1.24 ) $ (1.24 ) Nine Months Ended October 31, 2017 2018 Class A Class B Class A Class B Numerator: Net loss $ — $ (135,355 ) $ (14,356 ) $ (110,080 ) Denominator: Weighted-average number of shares used in — 1,584 1,495 11,459 Net loss per share, basic and diluted $ — $ (85.45 ) $ (9.61 ) $ (9.61 ) Since the Company was in a loss position for all periods presented, basic net loss per share is the same as diluted net loss per share for all periods as the inclusion of all potential common shares outstanding would have been anti-dilutive. The weighted-average impact of potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive was as follows: Three Months Ended October 31, Nine Months Ended October 31, 2017 2018 2017 2018 Convertible preferred stock on an if-converted basis 14,098,937 — 13,885,039 7,643,380 Options to purchase common stock 534,985 472,191 563,918 497,440 Restricted stock units — 250,527 — 178,866 Employee stock purchase program — 47,782 — 72,636 Common stock warrants 2,976 2,802 3,036 2,904 14,636,898 773,302 14,451,993 8,395,226

Related Party Transactions

Related Party Transactions	9 Months Ended
	Oct. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Certain members of the Company's board of directors serve as directors of and/or are executive officers of and, in some cases, are investors in, companies that are customers or vendors of the Company. Certain of the Company’s executive officers also serve as directors of or serve in an advisory capacity to companies that are customers or vendors of the Company. As of January 31, 2018 and October 31, 2018 , the Company had $0.6 million and $32,000 receivable from these customers, respectively. As of January 31, 2018 and October 31, 2018 , amounts payable to these vendors were immaterial. During the three months ended October 31, 2017 and 2018 and the nine months ended October 31, 2017 and 2018 , the Company recognized revenue of $0.4 million , $0.5 million , $1.2 million and $1.4 million , respectively, related to these customers. During the three months ended October 31, 2017 and 2018 and the nine months ended October 31, 2017 and 2018 , the Company recognized expense of $0.2 million , $0.1 million , $0.5 million and $0.5 million , respectively, related to these vendors. The Company previously utilized an aircraft owned by one of the Company's executive officers on an as-needed basis. This arrangement was terminated in June 2018. The Company recorded expenses related to usage of the aircraft of $0.1 million , $0 , $0.3 million and $0.3 million during the three months ended October 31, 2017 and 2018 and the nine months ended October 31, 2017 and 2018 , respectively.

Subsequent Events (Notes)

Subsequent Events (Notes)	9 Months Ended
	Oct. 31, 2018
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events In November 2018, the Company issued RSUs for an aggregate of 1,315,055 shares of Class B common stock with a grant date fair value of $16.53 per share.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Oct. 31, 2018
Accounting Policies [Abstract]
Basis of Accounting	The accompanying unaudited condensed consolidated financial statements, which include the accounts of the Company and its wholly owned subsidiaries, have been prepared in conformity with accounting principles generally accepted in the United States of America or GAAP. All intercompany balances and transactions have been eliminated in consolidation. The Company’s fiscal year ends on January 31.
Use of Estimates	Use of Estimates The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make estimates, judgments and assumptions that affect the amounts reported in the condensed consolidated financial statements and the accompanying notes. The Company bases its estimates on historical experience and on other assumptions that its management believes are reasonable under the circumstances. Actual results could differ from those estimates. The Company’s estimates and judgments include the determination of standalone selling prices for the Company’s services, which are used to determine revenue recognition for arrangements with multiple performance obligations; the amortization period for deferred contract acquisition costs; valuation of the Company’s stock-based compensation, including the underlying estimated fair value of common stock in periods prior to the date of the Company's IPO; useful lives of fixed assets; capitalization and estimated useful life of internal-use software; valuation estimates used when evaluating impairment of long-lived and intangible assets including goodwill; and the allowance for doubtful accounts.
Foreign Currency	Foreign Currency The functional currencies of the Company’s foreign subsidiaries are the respective local currencies. The cumulative effect of translation adjustments arising from the use of differing exchange rates from period to period is included in accumulated other comprehensive income within the condensed consolidated balance sheets. Changes in the cumulative foreign translation adjustment are reported in the condensed consolidated statements of convertible preferred stock and stockholders’ deficit and the condensed consolidated statements of comprehensive loss. Transactions denominated in currencies other than the functional currency are remeasured at the end of the period and when the related receivable or payable is settled, which may result in transaction gains or losses. Foreign currency transaction gains and losses are included in other income (expense), net in the condensed consolidated statements of operations and were not material for the three and nine months ended October 31, 2017 and 2018 . All assets and liabilities denominated in a foreign currency are translated into U.S. dollars at the exchange rate on the balance sheet date. Revenue and expenses are translated at the average exchange rate during the period, and equity balances are translated using historical exchange rates.
Segment Information	Segment Information The Company operates as one operating segment. The Company’s chief operating decision maker is its chief executive officer, who reviews financial information presented on a consolidated basis for purposes of making operating decisions, assessing financial performance and allocating resources.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents consist of cash on hand and money market funds. The fair value of cash equivalents approximated their carrying value as of January 31, 2018 and October 31, 2018 .
Accounts Receivables	Accounts Receivable and Allowance for Doubtful Accounts Accounts receivable are recorded at the invoiced amount (net of allowances), do not require collateral, and do not bear interest. The Company’s payment terms generally provide that customers pay within 30 days of the invoice date.
Allowance for Doubtful Accounts	The Company maintains an allowance for doubtful accounts for amounts the Company does not expect to collect. In establishing the required allowance, management considers historical losses, current market conditions, customers’ financial condition, the age of the receivables, and current payment patterns. Account balances are written off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote.
Revenue Recognition	Contract Acquisition Costs Contract acquisition costs primarily consist of deferred sales commissions, which are considered incremental and recoverable costs of obtaining a contract with a customer. Contract acquisition costs for initial contracts are deferred and then amortized on a straight-line basis over the period of benefit, which the Company has determined to be approximately four years . The period of benefit is determined by taking into consideration contractual terms, expected customer life, changes in the Company's technology and other factors. Contract acquisition costs for renewal contracts are not commensurate with contract acquisition costs for initial contracts and are recorded as expense when incurred if the period of benefit is one year or less. If the period of benefit is greater than one year, costs are deferred and then amortized on a straight-line basis over the period of benefit. Contract acquisition costs related to professional services and other performance obligations with a period of benefit of one year or less are recorded as expense when incurred. Amortization of contract acquisition costs is included in sales and marketing expenses in the accompanying condensed consolidated statements of operations. Revenue Recognition The Company derives revenue primarily from subscriptions to its cloud-based platform and professional services. Revenue is recognized when control of these services is transferred to customers in an amount that reflects the consideration to which the Company expects to be entitled to in exchange for those services, net of sales taxes. For sales through channel partners, the Company considers the channel partner to be the end customer for the purposes of revenue recognition as the Company's contractual relationships with channel partners do not depend on the sale of the Company's services to their customers and payment from the channel partner is not contingent on receiving payment from their customers. The Company's contractual relationships with channel partners do not allow returns, rebates, or price concessions. The price of subscriptions is generally fixed at contract inception and therefore, the Company's contracts do not contain a significant amount of variable consideration. Revenue recognition is determined through the following steps: • Identification of the contract, or contracts, with a customer • Identification of the performance obligations in the contract • Determination of the transaction price • Allocation of the transaction price to the performance obligations in the contract • Recognition of revenue when, or as, performance obligations are satisfied Subscription Revenue Subscription revenue primarily consists of fees paid by customers to access the Company’s cloud-based platform, including support services. The Company's subscription agreements generally have annual contractual terms and a smaller percentage have multi-year contractual terms. Revenue is recognized ratably over the related contractual term beginning on the date that the platform is made available to a customer. Access to the platform represents a series of distinct services as the Company continually provides access to and fulfills its obligation to the end customer over the subscription term. The series of distinct services represents a single performance obligation that is satisfied over time. The Company recognizes revenue ratably because the customer receives and consumes the benefits of the platform throughout the contract period. The Company's contracts are generally non-cancelable. Professional Services and Other Revenue Professional services revenue consists of implementation services sold with new subscriptions as well as professional services sold separately. Other revenue includes training and education. Professional services arrangements are billed in advance, and revenue from these arrangements is recognized as the services are provided, generally based on hours incurred. Training and education revenue is also recognized as the services are provided. Contracts with Multiple Performance Obligations Most of the Company's contracts with new customers contain multiple performance obligations, generally consisting of subscriptions and professional services. For these contracts, individual performance obligations are accounted for separately if they are distinct. The transaction price is allocated to the separate performance obligations on a relative standalone selling price basis. Standalone selling prices are determined based on historical standalone selling prices, taking into consideration overall pricing objectives, market conditions and other factors, including contract value, customer demographics and the number and types of users within the contract. Deferred Revenue The Company's contracts are typically billed annually in advance. Deferred revenue includes amounts collected or billed in excess of revenue recognized. Deferred revenue is recognized as revenue as the related performance obligations are satisfied. Deferred revenue that will be recognized during the succeeding twelve-month period is recorded as a current liability and the remaining portion is recorded as a noncurrent liability. Cost of Revenue Cost of subscription revenue consists primarily of third-party hosting services and data center capacity; employee-related costs directly associated with cloud infrastructure and customer support personnel, including salaries, benefits, bonuses and stock-based compensation; amortization expense associated with capitalized software development costs; depreciation expense associated with computer equipment and software; certain fees paid to various third parties for the use of their technology and services; and allocated overhead. Allocated overhead includes items such as information technology infrastructure, rent, and employee benefit costs. Cost of professional services and other revenue consists primarily of employee-related costs associated with these services, including stock-based compensation; third-party consultant fees related to implementations; and allocated overhead.
Deferred Offering Costs	Deferred Offering Costs The Company capitalized qualified legal, accounting and other direct costs related to the IPO.
Property and Equipment	Property and Equipment Property and equipment, net, are stated at cost less accumulated depreciation. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets or over the related lease terms (if shorter). Repairs and maintenance costs are expensed as incurred. The estimated useful lives of property and equipment are as follows: Computer equipment and software 2-3 years Furniture, vehicles and office equipment 3 years Leasehold improvements Shorter of remaining lease term or estimated useful life
Capitalized Internal-Use Software Costs	Capitalized Internal-Use Software Costs The Company capitalizes certain costs related to development of its platform incurred during the application development stage. Costs related to preliminary project activities and post-implementation activities are expensed as incurred. Maintenance and training costs are also expensed as incurred. Capitalized costs are included in property and equipment. Capitalized internal-use software is amortized as subscription cost of revenue on a straight-line basis over its estimated useful life, which is generally three years . Management evaluates the useful lives of these assets on an annual basis and tests for impairment whenever events or changes in circumstances occur that could impact the recoverability of these assets.
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill represents the excess of the purchase price in a business combination over the fair value of net tangible and intangible assets acquired. Goodwill and indefinite-lived intangible assets are not amortized, but rather tested for impairment at least annually on November 1 or more often if and when circumstances indicate that the carrying value may not be recoverable. Finite-lived intangible assets are amortized over their useful lives. Goodwill is tested for impairment based on reporting units. The Company periodically reevaluates the business and has determined that it continues to operate in one segment, which is also considered the sole reporting unit. Therefore, goodwill is tested for impairment at the consolidated level. The Company reviews its long-lived assets, including property and equipment and finite-lived intangible assets, for impairment whenever an event or change in facts and circumstances indicates that their carrying amounts may not be recoverable. Recoverability of these assets is measured by comparing the carrying amount to the estimated undiscounted future cash flows expected to be generated. If the carrying amount exceeds the undiscounted cash flows, the assets are determined to be impaired and an impairment charge is recognized as the amount by which the carrying amount exceeds fair value. There was no goodwill acquired and no impairment charges for goodwill or long-lived assets recorded during the periods presented.
Advertising Costs	Advertising Costs Advertising costs are expensed as incurred.
Research and Development	Research and Development Research and development expenses consist primarily of employee-related costs for the design and development of the Company's platform, contractor costs to supplement staff levels, third-party web services, consulting services, and allocated overhead. Research and development expenses, other than software development costs qualifying for capitalization, are expensed as incurred.
Share-Based Compensation	Stock-Based Compensation The Company records stock-based compensation based on the grant date fair value of the awards, which include stock options and restricted stock units, and recognizes the fair value of those awards as expense using the straight-line method over the requisite service period of the award. For restricted stock units that contain performance conditions, the Company recognizes expense using the accelerated attribution method. The Company estimates the grant date fair value of stock options using the Black-Scholes option-pricing model. Stock-based compensation expense related to purchase rights issued under the 2018 Employee Stock Purchase Plan (ESPP) is based on the Black-Scholes option-pricing model fair value of the estimated number of awards as of the beginning of the offering period. Stock-based compensation expense is recognized using the straight-line method over the offering period. The determination of the grant date fair value of stock-based awards is affected by the estimated fair value of the Company's common stock as well as other assumptions and judgments, which are estimated as follows: • Fair Value Per Share of Common Stock . Because there was no public market for the Company's common stock prior to the IPO, the board of directors determined the common stock fair value at the time of the grant of stock options by considering numerous objective and subjective factors, including contemporaneous valuations of the Company’s common stock, actual operating and financial performance, market conditions, and performance of comparable publicly traded companies, business developments, the likelihood of achieving a liquidity event, and transactions involving preferred and common stock, among other factors. Subsequent to the IPO, the Company determines the fair value of common stock as of each grant date using the market closing price of the Company's Class B common stock on the date of grant. • Expected Term . The expected term is determined using the simplified method, which is calculated as the midpoint of the option’s contractual term and vesting period. The Company uses this method due to limited stock option exercise history. For the ESPP, the Company uses the period from the beginning of the offering period to the end of each purchase period. • Expected Volatility . Since a public market for the Company's common stock did not exist prior to the IPO and, therefore, the Company does not have sufficient trading history of its common stock, expected volatility is estimated based on the volatility of similar publicly held companies over a period equivalent to the expected term of the awards. • Risk-free Interest Rate . The risk-free interest rate is determined using U.S. Treasury rates with a similar term as the expected term of the option. • Expected Dividend Yield . The Company has never declared or paid any cash dividends and does not presently plan to pay cash dividends in the foreseeable future. Consequently, the Company uses an expected dividend yield of zero.
Income Taxes	Income Taxes The Company accounts for income taxes in accordance with the liability method of accounting for income taxes. Under this method, the Company recognizes a liability or asset for the deferred income tax consequences of all temporary differences between the tax basis of assets and liabilities and their reported amounts in the condensed consolidated financial statements that will result in taxable or deductible amounts in future years when the reported amounts of the assets and liabilities are recovered or settled. These deferred income tax assets or liabilities are measured using the enacted tax rates that will be in effect when the differences are expected to affect taxable income. Valuation allowances are provided when it is more-likely-than-not that some or all of the deferred income tax assets may not be realized. In assessing the need for a valuation allowance, the Company has considered its historical levels of income, expectations of future taxable income and ongoing tax planning strategies. Because of the uncertainty of the realization of its deferred tax assets, the Company has a full valuation allowance for domestic net deferred tax assets, including net operating loss carryforwards, and tax credits related primarily to research and development. Realization of its deferred tax assets is dependent primarily upon future U.S. taxable income. Tax positions are recognized in the condensed consolidated financial statements when it is more-likely-than-not the position will be sustained upon examination by the tax authorities. The Company’s policy for recording interest and penalties related to income taxes, including uncertain tax positions, is to record such items as a component of the provision for income taxes.
Concentration of Risk	Concentrations of Risk and Significant Customers Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents and accounts receivable. The Company maintains its cash and cash equivalents in bank accounts, which at times may exceed federally insured limits. The Company has not experienced any losses in these instruments and believes it is not exposed to any significant risk with respect to cash and cash equivalents.
Concentration of Significant Customers	The Company is primarily dependent upon third parties in order to meet the uptime and performance requirements of its customers. Any disruption of or interference with the Company's use of these third parties would impact operations.
Net Loss Per Share	Net Loss per Share The Company computes net loss per share using the two-class method required for multiple classes of common stock and participating securities. The rights, including the liquidation and dividend rights, of the Class A common stock and Class B common stock are substantially identical, other than voting rights. Accordingly, the Class A common stock and Class B common stock share equally in the Company’s net losses. Before the IPO, the Company’s participating securities also included convertible preferred stock. The holders of convertible preferred stock did not have a contractual obligation to share in the Company’s losses, and as a result net losses were not allocated to these participating securities. Basic net loss per share is computed by dividing net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share is computed by dividing net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period increased by common shares that could be issued upon conversion or exercise of other outstanding securities to the extent those additional common shares would be dilutive. The dilutive effect of potentially dilutive securities is reflected in diluted net loss per share by application of the treasury stock method. During periods when the Company is in a net loss position, basic net loss per share is the same as diluted net loss per share as the effects of potentially dilutive securities are anti-dilutive.
Recent Accounting Pronouncements	Recently Adopted Accounting Pronouncements ASU No. 2014-09 In May 2014, the Financial Accounting Standards Board or FASB issued Accounting Standards Update or ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). Topic 606 establishes a principle for recognizing revenue upon the transfer of promised goods or services to customers in an amount that reflects the considerations to which the entity expects to be entitled to in exchange for those goods or services. ASU No. 2014-09 also added Subtopic 340-40, Other Assets and Deferred Costs - Contracts with Customers , which requires the deferral of incremental costs of obtaining a contract with a customer. Topic 606 and Subtopic 340-40 are collectively referred to herein as the "new standard." The Company elected to early adopt the requirements of the new standard as of February 1, 2017 with an initial application date of February 1, 2016, utilizing the full retrospective method of transition. The primary impact of adopting the new standard is the deferral of incremental costs of obtaining subscription contracts. Prior to adopting the new standard, deferral of commissions was not required and the Company's policy was to expense commission costs as incurred. Under the new standard, all incremental costs to obtain the contract are deferred if the period of benefit is greater than one year. These costs are amortized on a straight-line basis over the period of benefit, the determination of which is discussed in the contract acquisition costs policy above. Recently Issued Accounting Pronouncements In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842), which requires lessees to record most leases on the balance sheet and recognize the expenses on the income statement in a manner similar to current practice. ASU 2016-02 states that a lessee would recognize a lease liability for the obligation to make lease payments and a right-to-use asset for the right to use the underlying asset for the lease term. For public entities, the new standard is effective for fiscal years beginning after December 15, 2018 and interim periods within that reporting period. For all other entities, this standard is effective for annual reporting periods beginning after December 15, 2019 and interim periods within annual periods beginning after December 15, 2020. Early adoption is permitted. The Company expects to adopt this standard as of February 1, 2020, assuming it remains an emerging growth company. The Company is currently evaluating the impact to its condensed consolidated financial statements and related disclosures, but expects assets and liabilities related to leases to increase as a result of adopting this standard.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Oct. 31, 2018
Accounting Policies [Abstract]
Schedule of Estimated Useful Lives of Property, Plant and Equipment	The estimated useful lives of property and equipment are as follows: Computer equipment and software 2-3 years Furniture, vehicles and office equipment 3 years Leasehold improvements Shorter of remaining lease term or estimated useful life Property and equipment, net consisted of the following (in thousands): As of January 31, As of October 31, 2018 2018 Computer equipment and software $ 16,201 $ 16,522 Capitalized internal-use software development costs 11,823 16,371 Leasehold improvements 3,558 2,849 Furniture, vehicles and office equipment 2,430 2,536 34,012 38,278 Less accumulated depreciation and amortization (19,060 ) (25,614 ) $ 14,952 $ 12,664

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Oct. 31, 2018
Fair Value Disclosures [Abstract]
Summary of Assets Measured at Fair Value on Recurring Basis	The following table summarizes the assets measured at fair value on a recurring basis as of January 31, 2018 and October 31, 2018 by level within the fair value hierarchy (in thousands): January 31, 2018 Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 15,210 $ — $ — $ 15,210 Financial liability: Series D-2 convertible preferred stock warrants $ — $ — $ 229 $ 229 October 31, 2018 Level 1 Level 2 Level 3 Total (unaudited) Cash equivalents: Money market funds $ 200,913 $ — $ — $ 200,913
Schedule of Changes in Fair Value of Level 3 Instruments	The changes in the fair value of the Series D-2 convertible preferred stock and Class B common stock warrant liabilities were as follows (in thousands): Balance as of January 31, 2018 $ 229 Decrease in fair value of convertible preferred stock warrants (16 ) Write-off of convertible preferred stock warrant liability due to conversion to warrants on Class B common stock (213 ) Issuance of Class B common stock warrants 166 Decrease in fair value of Class B common stock warrants (40 ) Reclassification to additional paid-in capital of Class B common stock warrant liability due to resolution of contingency (126 ) Balance as of October 31, 2018 $ —
Schedule of Assumptions Used to Measure Level 3 Instruments at Fair Value	At each reporting date or immediately prior to an event that changes the classification of the related warrants from liability to equity, the warrant liabilities are remeasured to fair value using the Black-Scholes option-pricing model. The assumptions used as of January 31, 2018 and during the nine months ended October 31, 2018 were as follows: January 31, October 31, 2018 2018 Expected stock price volatility 45% 42% - 44% Expected term 2.6 years 2.6 - 3.0 years Risk-free interest rate 2.72% 2.54% - 2.60% Expected dividend yield — —

Property and Equipment (Tables)

Property and Equipment (Tables)	9 Months Ended
	Oct. 31, 2018
Property, Plant and Equipment [Abstract]
Schedule of Property and Equipment	The estimated useful lives of property and equipment are as follows: Computer equipment and software 2-3 years Furniture, vehicles and office equipment 3 years Leasehold improvements Shorter of remaining lease term or estimated useful life Property and equipment, net consisted of the following (in thousands): As of January 31, As of October 31, 2018 2018 Computer equipment and software $ 16,201 $ 16,522 Capitalized internal-use software development costs 11,823 16,371 Leasehold improvements 3,558 2,849 Furniture, vehicles and office equipment 2,430 2,536 34,012 38,278 Less accumulated depreciation and amortization (19,060 ) (25,614 ) $ 14,952 $ 12,664

Intangible Assets (Tables)

Intangible Assets (Tables)	9 Months Ended
	Oct. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-lived Intangible Assets	Intangible assets consisted of the following (in thousands): As of January 31, As of October 31, 2018 2018 Intellectual property excluding patents $ 2,289 $ 2,289 Software licenses — 1,603 Patents 950 950 3,239 4,842 Less accumulated amortization (213 ) (273 ) $ 3,026 $ 4,569
Schedule of Indefinite-Lived Intangible Assets	Intangible assets consisted of the following (in thousands): As of January 31, As of October 31, 2018 2018 Intellectual property excluding patents $ 2,289 $ 2,289 Software licenses — 1,603 Patents 950 950 3,239 4,842 Less accumulated amortization (213 ) (273 ) $ 3,026 $ 4,569

Accrued Expenses and Other Cu_2

Accrued Expenses and Other Current Liabilities (Tables)	9 Months Ended
	Oct. 31, 2018
Payables and Accruals [Abstract]
Schedule of Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities consisted of the following (in thousands): As of January 31, As of October 31, 2018 2018 Accrued payroll taxes $ 13,925 $ 11,426 Accrued expenses 11,677 11,347 Accrued bonus 7,200 6,912 Accrued benefits 6,005 6,342 Accrued commissions 6,120 4,370 Employee stock purchase plan liability — 2,102 Sales and other taxes payable 966 1,239 Other accrued liabilities 3,535 2,865 $ 49,428 $ 46,603

Deferred Revenue and Performa_2

Deferred Revenue and Performance Obligations (Tables)	9 Months Ended
	Oct. 31, 2018
Revenue from Contract with Customer [Abstract]
Schedule of Changes in Deferred Revenue Balance	Significant changes in the Company's deferred revenue balance for the nine months ended October 31, 2018 were as follows (in thousands): Balance as of January 31, 2018 $ 70,956 Revenue recognized that was included in the deferred revenue balance at the beginning of the period: Subscription $ (44,126 ) Professional services and other (3,840 ) Total (47,966 ) Increase due to billings excluding amounts recognized as revenue during the period 53,079 Balance as of October 31, 2018 $ 76,069

Geographic Information (Tables)

Geographic Information (Tables)	9 Months Ended
	Oct. 31, 2018
Revenue from Contract with Customer [Abstract]
Schedule of Revenue by Geographic Area	Revenue by geographic area is determined by the billing address of the customer. The following table sets forth revenue by geographic area (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2017 2018 2017 2018 United States $ 23,259 $ 28,232 $ 65,061 $ 79,715 Outside the United States 5,043 8,612 13,390 23,341 Total $ 28,302 $ 36,844 $ 78,451 $ 103,056 Percentage of revenue by geographic area: United States 82 % 77 % 83 % 77 % Outside the United States 18 % 23 % 17 % 23 %

Equity Incentive Plans (Tables)

Equity Incentive Plans (Tables)	9 Months Ended
	Oct. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Recognized Stock-based Compensation Expense	The Company recognized stock-based compensation expense related to its equity incentive plans as follows (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2017 2018 2017 2018 Cost of revenue: Subscription $ 13 $ 74 $ 36 $ 144 Professional services and other 10 34 31 112 Sales and marketing 453 1,441 1,505 5,490 Research and development 628 1,630 1,745 5,106 General and administrative 1,273 1,461 3,820 6,056 Interest expense 8 14 25 5 Total $ 2,385 $ 4,654 $ 7,162 $ 16,913
Schedule of Weighted-average Assumptions Used in Estimating Grant-date Fair Value of Options	The grant-date fair value of stock options was estimated using the Black-Scholes option-pricing model with the following weighted-average assumptions: Expected stock price volatility 47 % Expected life of options 6 years Risk-free interest rate 1.83 % Expected dividend yield — Fair value of common stock $28.20
Schedule of Outstanding Stock Options and Related Activity	The grant-date fair value of stock options was estimated using the Black-Scholes option-pricing model with the following weighted-average assumptions: Expected stock price volatility 47 % Expected life of options 6 years Risk-free interest rate 1.83 % Expected dividend yield — Fair value of common stock $28.20 The following table sets forth the outstanding common stock options and related activity for the nine months ended October 31, 2018 : Shares Subject to Outstanding Options Weighted- Average Exercise Price per Share Weighted-Average Remaining Contractual Term (years) Aggregate Intrinsic Value (in thousands) Balance at January 31, 2018 2,465,242 $ 21.90 6.4 $ 12,185 Exercised (20,263 ) 13.13 Forfeited (93,454 ) 30.81 Expired (117,001 ) 35.10 Balance at October 31, 2018 2,234,524 $ 20.92 5.0 $ 7,058 Vested and exercisable at October 31, 2018 2,046,000 $ 20.15 4.7 $ 7,058
Schedule of Outstanding RSUs and Related Activity	The following table sets forth the outstanding RSUs and related activity for the nine months ended October 31, 2018 : Number of Shares Weighted- Average Grant Date Fair Value Outstanding as of January 31, 2018 1,001,226 $ 23.40 Granted 428,338 22.76 Canceled (149,880 ) 23.40 Outstanding as of October 31, 2018 1,279,684 $ 23.23
Schedule of Weighted-average Assumptions Used in Determining Grant-date Fair Value of ESPP Purchase Rights	The fair value of the purchase rights for the ESPP are estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions: Expected stock price volatility 31% - 36% Expected term 0.75 - 2.25 years Risk-free interest rate 2.22% - 2.54% Expected dividend yield –

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	9 Months Ended
	Oct. 31, 2018
Earnings Per Share [Abstract]
Schedule of Computation of Net Loss Per Share	The following tables set forth the calculation of basic and diluted net loss per share during the periods presented. The shares issued in the IPO and the shares of Class A and Class B common stock issued upon conversion of the outstanding shares of convertible preferred stock in the IPO are included in the table below weighted for the period outstanding in the three and nine months ended October 31, 2017 and 2018 (in thousands, except per share amounts): Three Months Ended October 31, 2017 2018 Class A Class B Class A Class B Numerator: Net loss $ — $ (43,884 ) $ (4,033 ) $ (28,512 ) Denominator: Weighted-average number of shares used in — 1,609 3,264 23,074 Net loss per share, basic and diluted $ — $ (27.27 ) $ (1.24 ) $ (1.24 ) Nine Months Ended October 31, 2017 2018 Class A Class B Class A Class B Numerator: Net loss $ — $ (135,355 ) $ (14,356 ) $ (110,080 ) Denominator: Weighted-average number of shares used in — 1,584 1,495 11,459 Net loss per share, basic and diluted $ — $ (85.45 ) $ (9.61 ) $ (9.61 )
Schedule of Antidilutive Securities Excluded from Computation of Net Loss Per Share	Since the Company was in a loss position for all periods presented, basic net loss per share is the same as diluted net loss per share for all periods as the inclusion of all potential common shares outstanding would have been anti-dilutive. The weighted-average impact of potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive was as follows: Three Months Ended October 31, Nine Months Ended October 31, 2017 2018 2017 2018 Convertible preferred stock on an if-converted basis 14,098,937 — 13,885,039 7,643,380 Options to purchase common stock 534,985 472,191 563,918 497,440 Restricted stock units — 250,527 — 178,866 Employee stock purchase program — 47,782 — 72,636 Common stock warrants 2,976 2,802 3,036 2,904 14,636,898 773,302 14,451,993 8,395,226

Overview and Basis of Present_2

Overview and Basis of Presentation (Details) $ / shares in Units, $ in Thousands	Jul. 03, 2018USD ($)$ / sharesshares	Jul. 02, 2018shares	Jun. 28, 2018USD ($)	Jun. 15, 2018	Oct. 31, 2018USD ($)segmentshares	Oct. 31, 2017USD ($)	Jan. 31, 2018shares
Conversion of Stock [Line Items]
Offering costs | $					$ 4,063	$ 0
Convertible preferred stock, shares issued (shares) | shares		14,098,937			0		14,099,000
Reverse stock split ratio				0.0667
Number of operating segments | segment					1
Class A Common Stock
Conversion of Stock [Line Items]
Convertible preferred stock converted into common stock (shares) | shares		3,263,659
Class B Common Stock
Conversion of Stock [Line Items]
Convertible preferred stock converted into common stock (shares) | shares		10,835,278
Restricted stock units
Conversion of Stock [Line Items]
Accelerated compensation cost recognized | $			$ 6,600
Compensation cost not yet recognized | $					$ 18,000
Recognition period for compensation cost not yet recognized					1 year 9 months 10 days
IPO | Class B Common Stock
Conversion of Stock [Line Items]
Shares issued and sold in IPO from underwriters' over-allotment option (shares) | shares	10,580,000
Proceeds from initial public offering, net of underwriting discounts and commissions | $	$ 206,600
Offering costs | $	$ 4,100
Over-Allotment Option | Class B Common Stock
Conversion of Stock [Line Items]
Shares issued and sold in IPO from underwriters' over-allotment option (shares) | shares	1,380,000
Stock exercise price (in usd per share) | $ / shares	$ 21

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Narrative (Details)	3 Months Ended		9 Months Ended
	Oct. 31, 2018USD ($)	Oct. 31, 2017USD ($)	Oct. 31, 2018USD ($)segment	Oct. 31, 2017USD ($)	Jan. 31, 2018USD ($)
Finite-Lived Intangible Assets [Line Items]
Amortization period for capitalized contract acquisition costs	4 years		4 years
Amortization of expense related to contract acquisition costs	$ 2,100,000	$ 2,300,000	$ 5,750,000	$ 6,655,000
Impairment charge in relation to contract acquisition costs	0	0	0	0
Capitalized deferred offering costs					$ 1,700,000
Offering costs reclassified to stockholders' equity			$ 4,201,000
Number of operating segments | segment			1
Goodwill acquired	0	0	$ 0	0
Impairment charges for goodwill or long-lived assets	0	0	0	0
Advertising expense	$ 1,700,000	$ 7,900,000	$ 12,100,000	$ 19,500,000
Capitalized internal-use software development costs
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of property and equipment			3 years

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Property and Equipment (Details)	9 Months Ended
	Oct. 31, 2018
Computer equipment and software | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment	2 years
Computer equipment and software | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment	3 years
Furniture, vehicles and office equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment	3 years

Fair Value Measurements - Asset

Fair Value Measurements - Assets Measured at Fair Value on Recurring Basis (Details) - Recurring Basis - USD ($) $ in Thousands	Oct. 31, 2018	Jan. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	$ 200,913	$ 15,210
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	200,913	15,210
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	$ 0	0
Series D-2 convertible preferred stock warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Series D-2 convertible preferred stock warrants		229
Series D-2 convertible preferred stock warrants | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Series D-2 convertible preferred stock warrants		0
Series D-2 convertible preferred stock warrants | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Series D-2 convertible preferred stock warrants		0
Series D-2 convertible preferred stock warrants | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Series D-2 convertible preferred stock warrants		$ 229

Fair Value Measurements - Chang

Fair Value Measurements - Changes in Fair Value of Level 3 Instruments (Details) $ in Thousands	9 Months Ended
	Oct. 31, 2018USD ($)
Changes in Fair Value of Level 3 Instruments
Beginning balance	$ 229
Write-off of convertible preferred stock warrant liability due to conversion to warrants on Class B common stock	(213)
Issuance of Class B common stock warrants	166
Reclassification to additional paid-in capital of Class B common stock warrant liability due to resolution of contingency	(126)
Ending balance	0
Convertible Preferred Stock Warrants
Changes in Fair Value of Level 3 Instruments
Decrease in fair value of stock warrants	(16)
Class B Common Stock Warrants
Changes in Fair Value of Level 3 Instruments
Decrease in fair value of stock warrants	$ (40)

Fair Value Measurements - Assum

Fair Value Measurements - Assumptions Used to Measure Level 3 Instruments at Fair Value (Details)	Oct. 31, 2018	Jan. 31, 2018
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Expected term		2 years 7 months 6 days
Expected stock price volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input assumptions used for warrants outstanding (percent)		0.45
Risk-free interest rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input assumptions used for warrants outstanding (percent)		0.0272
Expected dividend yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input assumptions used for warrants outstanding (percent)		0
Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Expected term	2 years 7 months 10 days
Minimum | Expected stock price volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input assumptions used for warrants outstanding (percent)	0.42
Minimum | Risk-free interest rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input assumptions used for warrants outstanding (percent)	0.0254
Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Expected term	3 years
Maximum | Expected stock price volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input assumptions used for warrants outstanding (percent)	0.44
Maximum | Risk-free interest rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input assumptions used for warrants outstanding (percent)	0.0260

Property and Equipment (Details

Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017	Jan. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 38,278		$ 38,278		$ 34,012
Less accumulated depreciation and amortization	(25,614)		(25,614)		(19,060)
Property and equipment, net	12,664		12,664		14,952
Depreciation, excluding exchange rate effect	2,200	$ 2,000	6,700	$ 5,846
Software development costs capitalized	1,600	600	4,500	1,800
Capitalized software development costs amortized	1,000	$ 800	2,900	$ 2,300
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	16,522		16,522		16,201
Capitalized internal-use software development costs
Property, Plant and Equipment [Line Items]
Property and equipment, gross	16,371		16,371		11,823
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,849		2,849		3,558
Furniture, vehicles and office equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,536		$ 2,536		$ 2,430

Intangible Assets - Schedule of

Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Oct. 31, 2018	Jan. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 4,842	$ 3,239
Less accumulated amortization	(273)	(213)
Intangible assets, net	4,569	3,026
Patents
Finite-Lived Intangible Assets [Line Items]
Patents	950	950
Intellectual property excluding patents
Indefinite-lived Intangible Assets [Line Items]
Intellectual property excluding patents	2,289	2,289
Software licenses
Indefinite-lived Intangible Assets [Line Items]
Intellectual property excluding patents	$ 1,603	$ 0

Intangible Assets - Narrative (

Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 20	$ 20	$ 60	$ 60
Patents
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period			11 years

Accrued Expenses and Other Cu_3

Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Oct. 31, 2018	Jan. 31, 2018
Payables and Accruals [Abstract]
Accrued payroll taxes	$ 11,426	$ 13,925
Accrued expenses	11,347	11,677
Accrued bonus	6,912	7,200
Accrued benefits	6,342	6,005
Accrued commissions	4,370	6,120
Employee stock purchase plan liability	2,102	0
Sales and other taxes payable	1,239	966
Other accrued liabilities	2,865	3,535
Accrued expenses and other current liabilities	$ 46,603	$ 49,428

Deferred Revenue and Performa_3

Deferred Revenue and Performance Obligations (Details) $ in Thousands	9 Months Ended
	Oct. 31, 2018USD ($)
Contract with Customer, Liability, Increase (Decrease) [Roll Forward]
Deferred revenue, beginning balance	$ 70,956
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	(47,966)
Increase due to billings excluding amounts recognized as revenue during the period	53,079
Deferred revenue, ending balance	76,069
Subscription
Contract with Customer, Liability, Increase (Decrease) [Roll Forward]
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	(44,126)
Professional services and other
Contract with Customer, Liability, Increase (Decrease) [Roll Forward]
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	$ (3,840)

Deferred Revenue and Performa_4

Deferred Revenue and Performance Obligations - Narrative (Details) $ in Millions	Oct. 31, 2018USD ($)
Subscription | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-08-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue expected to be recognized from remaining performance obligations	$ 72.6
Expected satisfaction period for remaining revenue performance obligations	6 months
Subscription | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-08-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected satisfaction period for remaining revenue performance obligations	6 months
Subscription | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue expected to be recognized from remaining performance obligations	$ 150.8
Professional services and other | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-08-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue expected to be recognized from remaining performance obligations	$ 4.3
Expected satisfaction period for remaining revenue performance obligations	6 months
Professional services and other | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue expected to be recognized from remaining performance obligations	$ 13.7

Geographic Information - Revenu

Geographic Information - Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Concentration Risk [Line Items]
Total revenue	$ 36,844	$ 28,302	$ 103,056	$ 78,451
United States
Concentration Risk [Line Items]
Total revenue	$ 28,232	$ 23,259	$ 79,715	$ 65,061
United States | Revenue | Geographic concentration
Concentration Risk [Line Items]
Percentage of revenue by geographic area (percent)	77.00%	82.00%	77.00%	83.00%
Outside the United States
Concentration Risk [Line Items]
Total revenue	$ 8,612	$ 5,043	$ 23,341	$ 13,390
Outside the United States | Revenue | Geographic concentration
Concentration Risk [Line Items]
Percentage of revenue by geographic area (percent)	23.00%	18.00%	23.00%	17.00%

Line of Credit and Credit Fac_2

Line of Credit and Credit Facility - Narrative (Details) - USD ($)	1 Months Ended			3 Months Ended		9 Months Ended		17 Months Ended
	Apr. 30, 2018	Dec. 31, 2017	Jul. 31, 2016	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017	Nov. 30, 2017	Jan. 31, 2018
Line of Credit Facility [Line Items]
Interest capitalized						$ 1,641,000	$ 0
Interest expense incurred				$ 3,100,000	$ 43,000	7,900,000	100,000
Secured credit facility | Line of Credit
Line of Credit Facility [Line Items]
Term of secured line of credit			2 years
Borrowing capacity under credit facility			$ 20,000,000
Annual commitment fee			$ 50,000
Annual commitment fee on unused portion of facility (percent)			0.25%
Draws made on line of credit								$ 0
Secured credit facility | Line of Credit | Credit Facility Maturing January 1, 2021
Line of Credit Facility [Line Items]
Borrowing capacity under credit facility	$ 100,000,000	$ 80,000,000
Draws made on line of credit	$ 50,000,000	50,000,000
Upfront issuance fees incurred to-date									$ 1,200,000
Upfront issuance fees incurred during period						200,000
Annualized recurring revenue as ratio of Company's aggregate revenue for preceding quarter	4
Discount periods netted from calculation of annualized revenue	1 year
Covenant measurement period on a trailing basis	3 months
Other fee required under amended credit facility				$ 2,000,000		$ 2,000,000
Secured credit facility | Term loan
Line of Credit Facility [Line Items]
Required closing fee under line of credit	$ 4,500,000	3,600,000
Secured credit facility | Term loan | Credit Facility Maturing January 1, 2021
Line of Credit Facility [Line Items]
Additional amounts available to draw under credit facility		30,000,000
Additional term loan borrowings incurred	$ 20,000,000
Minimum interest rate of portion of outstanding principal accruing interest at floating rate (percent)				7.00%		7.00%
Interest rate at period end (percent)				7.90%		7.90%
Interest rate of portion of outstanding principal accruing interest at fixed rate (percent)				2.50%		2.50%
Interest capitalized				$ 600,000	$ 0	$ 1,600,000	$ 0
Term loans outstanding		$ 50,000,000
Secured credit facility | Prime rate | Line of Credit
Line of Credit Facility [Line Items]
Spread on variable rate (percent)			0.75%
Secured credit facility | LIBOR | Term loan | Credit Facility Maturing January 1, 2021
Line of Credit Facility [Line Items]
Spread on variable rate (percent)						5.50%
Series D-2 convertible preferred stock warrants
Line of Credit Facility [Line Items]
Number of shares that can be purchased (shares)		28,462
Series D-2 convertible preferred stock warrants | Credit Facility Maturing January 1, 2021
Line of Credit Facility [Line Items]
Number of shares that can be purchased (shares)		28,462
Exercise price of warrants (in usd per share)		$ 126.47
Series D-2 convertible preferred stock warrants		$ 300,000							$ 200,000
Class B Common Stock Warrants
Line of Credit Facility [Line Items]
Number of shares that can be purchased (shares)	66,664
Class B Common Stock Warrants | Credit Facility Maturing January 1, 2021
Line of Credit Facility [Line Items]
Number of shares that can be purchased (shares)	66,664
Exercise price of warrants (in usd per share)	$ 45
January 1, 2021 | Secured credit facility | Line of Credit
Line of Credit Facility [Line Items]
Percentage of closing fee payable (percent)	50.00%
May 1, 2021 | Secured credit facility | Line of Credit
Line of Credit Facility [Line Items]
Percentage of closing fee payable (percent)	50.00%
January 31, 2018 and April 30, 2018 | Secured credit facility | Line of Credit | Credit Facility Maturing January 1, 2021
Line of Credit Facility [Line Items]
Minimum ratio of outstanding debt to annualized recurring revenue	1
July 30, 2018 and October 31, 2018 | Secured credit facility | Line of Credit | Credit Facility Maturing January 1, 2021
Line of Credit Facility [Line Items]
Minimum ratio of outstanding debt to annualized recurring revenue	0.95
January 31, 2019 and April 30, 2019 | Secured credit facility | Line of Credit | Credit Facility Maturing January 1, 2021
Line of Credit Facility [Line Items]
Minimum ratio of outstanding debt to annualized recurring revenue	0.90
July 31, 2019 and October 31, 2019 | Secured credit facility | Line of Credit | Credit Facility Maturing January 1, 2021
Line of Credit Facility [Line Items]
Minimum ratio of outstanding debt to annualized recurring revenue	0.85
January 31, 2020 | Secured credit facility | Line of Credit | Credit Facility Maturing January 1, 2021
Line of Credit Facility [Line Items]
Minimum ratio of outstanding debt to annualized recurring revenue	0.80

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Rent expense under operating leases	$ 1.9	$ 1.5	$ 5.1	$ 3.8

Stockholders' (Deficit) Equity

Stockholders' (Deficit) Equity - Narrative (Details)	Jul. 02, 2018shares	Oct. 31, 2018classvoteshares	Apr. 30, 2018$ / sharesshares	Jan. 31, 2018shares	Dec. 31, 2017$ / sharesshares	Jul. 31, 2016$ / sharesshares	Nov. 30, 2011$ / sharesshares
Class of Stock [Line Items]
Preferred stock authorized (shares)		10,000,000		0
Preferred stock issued (shares)		0		0
Number of classes of common stock | class		2
Preferred stock outstanding (shares)		0		0
Warrants expiration period				2 years 7 months 6 days
Class A Common Stock
Class of Stock [Line Items]
Number of votes each share is entitled to | vote		40
Shares to be issued upon conversion (shares)		1
Common stock authorized (shares)		3,700,000		3,700,000
Common stock issued (shares)		3,263,659		0
Convertible preferred stock converted into common stock (shares)	3,263,659
Stock outstanding (shares)		3,263,659		0
Class B Common Stock
Class of Stock [Line Items]
Number of votes each share is entitled to | vote		1
Common stock authorized (shares)		500,000,000		21,200,000
Common stock issued (shares)		23,073,611		1,638,648
Convertible preferred stock converted into common stock (shares)	10,835,278
Stock outstanding (shares)		23,074,189		1,638,648
Series D-2 convertible preferred stock warrants
Class of Stock [Line Items]
Number of shares that can be purchased (shares)					28,462
Class B Common Stock Warrants
Class of Stock [Line Items]
Number of shares that can be purchased (shares)			66,664
Credit Facility Maturing January 1, 2021 | Series D-2 convertible preferred stock warrants
Class of Stock [Line Items]
Number of shares that can be purchased (shares)					28,462
Exercise price of warrants (in usd per share) | $ / shares					$ 126.47
Credit Facility Maturing January 1, 2021 | Class B Common Stock Warrants
Class of Stock [Line Items]
Number of shares that can be purchased (shares)			66,664
Exercise price of warrants (in usd per share) | $ / shares			$ 45
Credit Facility Due July 18, 2018 | Class B Common Stock Warrants
Class of Stock [Line Items]
Number of shares that can be purchased (shares)						3,333
Exercise price of warrants (in usd per share) | $ / shares						$ 34.35
Warrants expiration period						10 years
November 2011 Loan | Class B Common Stock Warrants
Class of Stock [Line Items]
Number of shares that can be purchased (shares)							3,729
Exercise price of warrants (in usd per share) | $ / shares							$ 4.8
Warrants expiration period						10 years

Equity Incentive Plans - Narrat

Equity Incentive Plans - Narrative (Details) $ / shares in Units, $ in Thousands	Jun. 28, 2018USD ($)	Oct. 31, 2018USD ($)purchase_periodshares	Oct. 31, 2017USD ($)$ / shares	Oct. 31, 2018USD ($)purchase_periodshares	Oct. 31, 2017USD ($)$ / shares	Jun. 30, 2018shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant-date fair value (in usd per share) | $ / shares			$ 13.20		$ 13.20
Options granted in period (shares)		0		0
Options exercised | $		$ 8	$ 532	$ 200	$ 2,500
Options to purchase common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				4 years
Term of award				P10Y
Compensation cost not yet recognized | $		2,300		$ 2,300
Recognition period for compensation cost not yet recognized				1 year 3 months 18 days
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognition period for compensation cost not yet recognized				1 year 9 months 10 days
Accelerated compensation cost recognized | $	$ 6,600
Compensation cost not yet recognized | $		$ 18,000		$ 18,000
2018 Equity Incentive Plan (2018 Plan)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (shares)		5,497,474		5,497,474
2018 Equity Incentive Plan (2018 Plan) | Common Class A and Common Class B
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of outstanding shares (percent)				5.00%
2018 Equity Incentive Plan (2018 Plan) | Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (shares)		5,238,423		5,238,423
Additional shares authorized (shares)				3,500,000
Employee Stock Purchase Plan | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Duration of overlapping offering periods				24 months
Number of purchase periods in each offering period | purchase_period		4		4
Duration of purchase periods				6 months
Duration of first purchase period in first offering period				9 months
Share purchase price as percentage of fair value of common stock (percent)		15.00%		15.00%
Maximum annual contributions via payroll deductions (shares)				2,000
Percentage of eligible compensation (percent)				85.00%
Number of shares available for grant (shares)		887,081		887,081
Recognition period for compensation cost not yet recognized				23 months 1 day
Compensation cost not yet recognized | $		$ 5,000		$ 5,000
Shares purchased (shares)				0
Employee Stock Purchase Plan | Common Class A and Common Class B | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of outstanding shares (percent)				1.50%
Employee Stock Purchase Plan | Class B Common Stock | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (shares)						1,047,684
Additional shares authorized (shares)				1,050,000
Minimum | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				1 year
Service condition satisfaction period				3 years
Maximum | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				2 years
Service condition satisfaction period				4 years

Equity Incentive Plans - Recogn

Equity Incentive Plans - Recognized Stock-based Compensation Expense (Details) - 2011 Equity Incentive Plan (the Plan) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 4,654	$ 2,385	$ 16,913	$ 7,162
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	1,441	453	5,490	1,505
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	1,630	628	5,106	1,745
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	1,461	1,273	6,056	3,820
Interest expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	14	8	5	25
Subscription | Cost of revenue
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	74	13	144	36
Professional services and other | Cost of revenue
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 34	$ 10	$ 112	$ 31

Equity Incentive Plans - Assump

Equity Incentive Plans - Assumptions Used to Calculate the Grant-date Fair Value (Details)	9 Months Ended
	Oct. 31, 2018$ / shares
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected stock price volatility	47.00%
Expected term	6 years
Risk-free interest rate	1.83%
Expected dividend yield	0.00%
Fair value of common stock (in usd per share)	$ 28.20
Minimum | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected stock price volatility	31.00%
Expected term	9 months
Risk-free interest rate	2.22%
Expected dividend yield	0.00%
Maximum | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected stock price volatility	36.00%
Expected term	2 years 3 months
Risk-free interest rate	2.54%
Expected dividend yield	0.00%

Equity Incentive Plans - Outsta

Equity Incentive Plans - Outstanding Common Stock Options and Related Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2018	Jan. 31, 2018
Shares Subject to Outstanding Options
Beginning balance of options outstanding (shares)		2,465,242
Granted (shares)	0	0
Exercised (shares)		(20,263)
Forfeited (shares)		(93,454)
Expired (shares)		(117,001)
Ending balance of options outstanding (shares)	2,234,524	2,234,524	2,465,242
Options vested and exercisable, outstanding (shares)	2,046,000	2,046,000
Weighted- Average Exercise Price per Share
Options outstanding, weighted average exercise price (in usd per share)		$ 21.90
Options exercised, weighted average exercise price (in usd per share)		13.13
Options forfeited, weighted average exercise price (in usd per share)		30.81
Options expired, weighted average exercise price (in usd per share)		35.10
Options outstanding, weighted average exercise price (in usd per share)	$ 20.92	20.92	$ 21.90
Options vested and exercisable, weighted average exercise price (in usd per share)	$ 20.15	$ 20.15
Additional disclosures
Options outstanding, weighted average remaining contractual term		5 years	6 years 4 months 24 days
Options vested and exercisable, weighted average remaining contractual term		4 years 8 months 12 days
Options outstanding, aggregate intrinsic value	$ 7,058	$ 7,058	$ 12,185
Options vested and exercisable, aggregate intrinsic value	$ 7,058	$ 7,058

Equity Incentive Plans - Outs_2

Equity Incentive Plans - Outstanding RSUs and Related Activity (Details) - Restricted stock units	9 Months Ended
	Oct. 31, 2018$ / sharesshares
Number of Shares
Outstanding as of January 31, 2018 (shares) | shares	1,001,226
Granted (shares) | shares	428,338
Canceled (shares) | shares	(149,880)
Outstanding as of July 31, 2018 (shares) | shares	1,279,684
Weighted- Average Grant Date Fair Value
Outstanding as of January 31,2018 (in usd per share) | $ / shares	$ 23.40
Granted (in usd per share) | $ / shares	22.76
Canceled (in usd per share) | $ / shares	23.40
Outstanding as of July 31, 2018 (in usd per share) | $ / shares	$ 23.23

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Income Tax Disclosure [Abstract]
Income tax expense	$ 199	$ 99	$ 909	$ 296

Net Loss Per Share - Computatio

Net Loss Per Share - Computation of Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net loss	$ (32,545)	$ (43,884)	$ (124,436)	$ (135,355)
Weighted-average number of shares used in computing net loss per share, basic and diluted (shares)	26,338	1,609	12,954	1,584
Net loss per share, basic and diluted (in usd per share)	$ (1.24)	$ (27.27)	$ (9.61)	$ (85.45)
Class A Common Stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net loss	$ (4,033)	$ 0	$ (14,356)	$ 0
Weighted-average number of shares used in computing net loss per share, basic and diluted (shares)	3,264	0	1,495	0
Net loss per share, basic and diluted (in usd per share)	$ (1.24)	$ 0	$ (9.61)	$ 0
Class B Common Stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net loss	$ (28,512)	$ (43,884)	$ (110,080)	$ (135,355)
Weighted-average number of shares used in computing net loss per share, basic and diluted (shares)	23,074	1,609	11,459	1,584
Net loss per share, basic and diluted (in usd per share)	$ (1.24)	$ (27.27)	$ (9.61)	$ (85.45)

Net Loss Per Share - Antidiluti

Net Loss Per Share - Antidilutive Securities Excluded from Computation of Net Loss Per Share (Details) - shares	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities that were not included in the diluted net loss per share calculations (shares)	773,302	14,636,898	8,395,226	14,451,993
Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities that were not included in the diluted net loss per share calculations (shares)	0	14,098,937	7,643,380	13,885,039
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities that were not included in the diluted net loss per share calculations (shares)	472,191	534,985	497,440	563,918
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities that were not included in the diluted net loss per share calculations (shares)	250,527	0	178,866	0
Employee stock purchase program
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities that were not included in the diluted net loss per share calculations (shares)	47,782	0	72,636	0
Common stock warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities that were not included in the diluted net loss per share calculations (shares)	2,802	2,976	2,904	3,036

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017	Jan. 31, 2018
Vendors of the company
Related Party Transaction [Line Items]
Due from related party	$ 0		$ 0		$ 0.6
Revenue from related party	0.5	$ 0.4	1.4	$ 1.2
Expenses recognized from transactions with related party	0.1	0.2	0.5	0.5
Executive officer of the company
Related Party Transaction [Line Items]
Expenses recognized from transactions with related party	$ 0	$ 0.1	$ 0.3	$ 0.3

Subsequent Events (Details)

Subsequent Events (Details) - Restricted stock units - $ / shares	1 Months Ended	9 Months Ended
	Nov. 30, 2018	Oct. 31, 2018	Jan. 31, 2018
Subsequent Event [Line Items]
Granted (shares)		428,338
Issued shares grant date fair value (in usd per share)		$ 23.23	$ 23.40
Class B Common Stock | Subsequent Event
Subsequent Event [Line Items]
Granted (shares)	1,315,055
Issued shares grant date fair value (in usd per share)	$ 16.53