Coupa Software (COUP) 10-K 3 Apr 17 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2017	Mar. 31, 2017
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jan. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	COUP
Entity Registrant Name	Coupa Software Inc
Entity Central Index Key	1,385,867
Current Fiscal Year End Date	--01-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		50,495,239
Entity Public Float	$ 638.3

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2016
Current assets:
Cash and cash equivalents	$ 201,721	$ 92,348
Accounts receivable, net of allowances	47,614	27,979
Prepaid expenses and other current assets	9,150	4,549
Deferred commissions, current portion	3,091	3,137
Total current assets	261,576	128,013
Property and equipment, net	4,642	3,775
Deferred commissions, net of current portion	2,895	2,386
Goodwill	6,306	1,605
Intangible assets, net	5,848	1,369
Other assets	2,597	2,778
Total assets	283,864	139,926
Current liabilities:
Accounts payable	1,175	1,096
Accrued expenses and other current liabilities	17,490	14,446
Deferred revenue, current portion	89,872	63,870
Total current liabilities	108,537	79,412
Deferred revenue, net of current portion	968	1,056
Other liabilities	467	747
Total liabilities	109,972	81,215
Commitments and contingencies (Note 8)
Convertible preferred stock, $0.0001 par value per share; zero and 133,875,417 shares authorized at January 31, 2017 and January 31, 2016; zero and 33,431,855 shares issued and outstanding at January 31, 2017 and January 31, 2016, respectively; aggregate liquidation preference of zero and $169,247 at January 31, 2017 and January 31, 2016, respectively		164,950
Stockholders’ equity (deficit):
Preferred stock, $0.0001 par value per share; 25,000,000 and zero shares authorized at January 31, 2017 and 2016; zero shares issued and outstanding at January 31, 2017 and 2016, respectively
Common stock, $0.0001 par value per share; 625,000,000 and 225,000,000 shares authorized at January 31, 2017 and January 31, 2016; 50,251,541 and 5,758,338 shares issued and outstanding as of January 31, 2017 and January 31, 2016, respectively	5	1
Additional paid-in capital	334,363	16,629
Accumulated deficit	(160,476)	(122,869)
Total stockholders’ equity (deficit)	173,892	(106,239)
Total liabilities, convertible preferred stock and stockholders’ equity (deficit)	$ 283,864	$ 139,926

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2016
Statement Of Financial Position [Abstract]
Convertible preferred stock, par value	$ 0.0001	$ 0.0001
Convertible preferred stock, shares authorized	0	133,875,417
Convertible preferred stock, shares issued	0	33,431,855
Convertible preferred stock, shares outstanding	0	33,431,855
Convertible preferred stock, liquidation preference	$ 0	$ 169,247
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	25,000,000	0
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	625,000,000	225,000,000
Common stock, shares issued	50,251,541	5,758,338
Common stock, shares outstanding	50,251,541	5,758,338

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Revenues:
Subscription services	$ 117,788	$ 75,667	$ 43,051
Professional services and other	15,987	8,011	7,794
Total revenues	133,775	83,678	50,845
Cost of revenues:
Subscription services	25,055	16,804	8,813
Professional services and other	21,214	15,107	9,911
Total cost of revenues	46,269	31,911	18,724
Gross profit	87,506	51,767	32,121
Operating expenses:
Research and development	30,262	22,767	11,887
Sales and marketing	68,562	54,713	33,724
General and administrative	24,106	19,540	13,146
Total operating expenses	122,930	97,020	58,757
Loss from operations	(35,424)	(45,253)	(26,636)
Other expense, net	(1,335)	(568)	(563)
Loss before provision for income taxes	(36,759)	(45,821)	(27,199)
Provision for income taxes	848	335	101
Net loss and comprehensive loss	$ (37,607)	$ (46,156)	$ (27,300)
Net loss per share attributable to common stockholders, basic and diluted	$ (1.88)	$ (9.81)	$ (9.10)
Weighted-average number of shares used in computing net loss per share attributable to common stockholders, basic and diluted	19,988	4,704	2,999

CONSOLIDATED STATEMENTS OF CONV

CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Convertible Preferred Stock	Series F convertible preferred stock	Series E preferred stock warrants	Series G convertible preferred stock	Common Stock	Common StockSeries E preferred stock warrants	Additional Paid-In Capital	Additional Paid-In CapitalSeries E preferred stock warrants	Accumulated Deficit
Balance at Jan. 31, 2014	$ (47,619)					$ 1		$ 1,793		$ (49,413)
Balance, shares at Jan. 31, 2014						3,067,348
Balance at Jan. 31, 2014		$ 48,472
Balance, shares at Jan. 31, 2014		23,543,199
Issuance of convertible preferred stock, net of issuance costs			$ 39,972
Issuance of convertible preferred stock, net of issuance costs, shares			4,944,371
Exercise of stock options	410							410
Exercise of stock options, shares						1,136,298
Vesting of early exercised stock options	86							86
Stock-based compensation expense	1,854							1,854
Net loss	(27,300)									(27,300)
Balance at Jan. 31, 2015	(72,569)					$ 1		4,143		(76,713)
Balance, shares at Jan. 31, 2015						4,203,646
Balance at Jan. 31, 2015		$ 88,444
Balance, shares at Jan. 31, 2015		28,487,570
Issuance of convertible preferred stock, net of issuance costs					$ 75,731
Issuance of convertible preferred stock, net of issuance costs, shares					4,783,762
Exercise of Series E preferred stock warrants				$ 775
Exercise of Series E preferred stock warrants, shares				160,523
Issuance of common stock for acquisitions	1,269							1,269
Issuance of common stock for acquisitions, shares						314,386
Exercise of stock options	477							477
Exercise of stock options, shares						1,240,306
Vesting of early exercised stock options	142							142
Stock-based compensation expense	10,598							10,598
Net loss	(46,156)									(46,156)
Balance at Jan. 31, 2016	(106,239)					$ 1		16,629		(122,869)
Balance, shares at Jan. 31, 2016						5,758,338
Balance at Jan. 31, 2016	$ 164,950	$ 164,950
Balance, shares at Jan. 31, 2016	33,431,855	33,431,855
Exercise of Series E preferred stock warrants				$ 924					$ 924
Exercise of Series E preferred stock warrants, shares							36,971
Initial public offering, net of issuance costs	$ 137,113					$ 1		137,112
Initial public offering, net of issuance costs, shares						8,510,000
Issuance of common stock for acquisitions	2,357							2,357
Issuance of common stock for acquisitions, shares						150,545
Conversion of preferred stock	164,950					$ 3		164,947
Conversion of preferred stock, shares						34,610,979
Conversion of preferred stock		$ (164,950)
Conversion of preferred stock, shares		(33,431,855)
Exercise of stock options	2,186							2,186
Exercise of stock options, shares						1,184,708
Vesting of early exercised stock options	606							606
Stock-based compensation expense	9,551							9,551
Excess income tax benefit	51							51
Net loss	(37,607)									(37,607)
Balance at Jan. 31, 2017	$ 173,892					$ 5		$ 334,363		$ (160,476)
Balance, shares at Jan. 31, 2017						50,251,541
Balance, shares at Jan. 31, 2017	0

CONSOLIDATED STATEMENTS OF CON6

CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Issuance costs	$ 5,344
Series F convertible preferred stock
Issuance costs			$ 28
Series G convertible preferred stock
Issuance costs		$ 4,269

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Cash flows from operating activities
Net loss	$ (37,607)	$ (46,156)	$ (27,300)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	4,575	2,758	1,377
Amortization of deferred commissions	4,004	2,834	1,384
Stock-based compensation	9,452	10,568	1,807
Change in fair value of preferred stock warrant liability	627	190	50
Other non-cash items	355
Changes in operating assets and liabilities net of effects from acquisitions:
Accounts receivable	(20,041)	(8,314)	(8,659)
Prepaid expenses and other current assets	(4,600)	(1,289)	(807)
Other assets	(1,136)	(2,006)	(591)
Deferred commissions	(4,468)	(5,384)	(3,161)
Accounts payable	224	(121)	368
Accrued expenses and other liabilities	1,772	696	7,277
Deferred revenue	25,888	24,155	16,326
Net cash used in operating activities	(20,955)	(22,069)	(11,929)
Cash flows from investing activities
Purchase of property and equipment	(4,491)	(3,868)	(2,370)
Acquisitions, net of cash acquired	(6,750)	(1,426)
Net cash used in investing activities	(11,241)	(5,294)	(2,370)
Cash flows from financing activities
Proceeds from issuance of common stock, net of underwriting discounts, commissions and offering costs	137,216	(64)
Proceeds from the exercise of common stock options	4,252	1,570	466
Excess tax benefit from stock-based compensation	51
Proceeds from issuance of convertible preferred stock, net of issuance costs		75,731	39,972
Proceeds from the exercise of preferred stock warrants	50	500
Net cash provided by financing activities	141,569	77,737	40,438
Net increase in cash and cash equivalents	109,373	50,374	26,139
Cash and cash equivalents at beginning of period	92,348	41,974	15,835
Cash and cash equivalents at end of period	201,721	92,348	41,974
Supplemental disclosure of cash flow data
Cash paid for income taxes	390	17	8
Supplemental disclosure of non-cash investing and financing activities
Issuance of common stock in connection with acquisitions	2,357	1,269
Vesting of early exercised stock options	606	142	86
Property and equipment included in accounts payable and accrued expenses and other current liabilities	84	184	$ 43
Conversion of convertible preferred stock to common stock	$ 164,950
Offering costs included in accounts payable and accrued expenses and other current liabilities		$ 1,254

Organization and Description of

Organization and Description of Business	12 Months Ended
	Jan. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization and Description of Business	Note 1. Organization and Description of Business The Company Coupa Software Incorporated (the “Company”) was incorporated in the state of Delaware in 2006. The Company provides a unified, cloud-based spend management platform that provide greater visibility into and control over how companies spend money. The platform enables businesses to achieve savings that drive profitability. The Company is based in San Mateo, California. The Company’s fiscal year ends on January 31. Initial Public Offering In October 2016, the Company closed its initial public offering (“IPO”), in which it issued and sold 8,510,000 shares of common stock inclusive of the underwriters’ option to purchase additional shares that was exercised in full. The Company received aggregate proceeds of $142.5 million from the IPO, net of underwriters’ discounts and commissions, before deducting offering costs of approximately $5.3 million. Upon the closing of the IPO, all shares of its outstanding preferred stock automatically converted into 34,610,979 shares of common stock.

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Jan. 31, 2017
Accounting Policies [Abstract]
Significant Accounting Policies	Note 2. Significant Accounting Policies Basis of Presentation The accompanying consolidated financial statements have been prepared using accounting principles generally accepted in the United States of America (“GAAP”). The consolidated financial statements include the results of the Company and its wholly owned subsidiaries. All significant intercompany transactions and balances have been eliminated during consolidation. Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. On an ongoing basis, management evaluates its significant estimates including the valuation of accounts receivable, the lives of tangible and intangible assets, stock-based compensation, stock warrants, revenue recognition, the valuation of acquired intangible assets, and provisions for income taxes. Management bases its estimates on historical experience and on various other market-specific and relevant assumptions that management believes to be reasonable under the circumstances. Actual results could differ from those estimates and such differences could be material to the financial position and results of operations. Segment Information The Company’s chief operating decision maker is the Chief Executive Officer (“CEO”). The CEO reviews the financial information presented on a consolidated basis for purposes of allocating resources and evaluating the Company’s financial performance. Accordingly, the Company has determined that it operates in a single reporting segment; cloud platform. Foreign Currency Translation The functional currency for the Company’s foreign operations is the U.S. dollar. Foreign currency transaction gains and losses are included in the consolidated statements of operations for the period in other expense, net. All assets and liabilities denominated in a foreign currency are translated into U.S. dollars at the exchange rate prevailing on the balance sheet date. Revenues and expenses are translated at the transaction spot rate. For the years ended January 31, 2017, 2016 and 2015, foreign currency transaction gains and losses were comprised of a net loss of $638,000, $789,000 and $166,000, respectively. Risks and Uncertainties The Company’s services are concentrated in an industry which is characterized by significant competition, rapid technological advances and changes in customer requirements and industry standards. The success of the Company depends on management’s ability to anticipate and respond quickly and adequately to technological developments in the industry and changes in customer requirements and industry standards. Any significant delays in the development or introduction of services could have a material adverse effect on the Company’s business and operating results. Furthermore, the effects of potential legal activity that could be brought against the Company, including costs incurred to defend legal cases, relationships with customers and market perception, and the financial impact of any judicial decisions, could have a material adverse effect on the Company’s business and operating results. The Company serves customers and users from data center facilities operated by a single third party, located in the U.S., Singapore, Ireland, Germany and Australia. The Company has internal procedures to restore services in the event of disasters at the current data center facilities. Even with these procedures for disaster recovery in place, cloud applications could be significantly interrupted during the procedures to restore services. Concentration of Risk and Significant Customers Financial instruments that potentially subject the Company to a concentration of credit risk consist of cash and cash equivalents and accounts receivable. Cash deposits may, at times, exceed amounts insured by the Federal Deposit Insurance Corporation (“FDIC”) and the Securities Investor Protection Corporation (“SIPC”). The Company has not experienced any losses on its deposits of cash and cash equivalents to date. No customer balance comprised 10% or more of total accounts receivable at January 31, 2017 or 2016. During the years ended January 31, 2017, 2016 and 2015, revenues by geographic area, based on billing addresses of the customers, was as follows: For the year ended January 31, 2017 2016 2015 United States $ 90,449 $ 60,411 $ 38,091 Foreign countries 43,326 23,267 12,754 Total revenues $ 133,775 $ 83,678 $ 50,845 No single foreign country represented more than 10% of the Company’s revenues in any period. Additionally, no single customer represented more than 10% of the Company’s revenues in any period. Fair Value of Financial Instruments The Company’s financial instruments include cash and money market funds, trade receivables, accounts payable and preferred stock warrants. Cash and cash equivalents and warrants are reported at fair value. The recorded carrying amount of trade receivables and accounts payable approximates their fair value due to their short-term nature. Cash and Cash Equivalents The Company considers all highly liquid investments purchased with original maturities of less than three months from the date of purchase to be cash equivalents. The Company’s cash and cash equivalents consist of monies held in bank demand deposits and money market funds and are presented at fair market value based on quoted market prices. Accounts Receivable and Allowance for Doubtful Accounts The Company extends credit to its customers in the normal course of business, and does not require cash collateral or other security to support the collection of customer receivables. The Company estimates the amount of uncollectible accounts receivable at the end of each reporting period based on the aging of the receivable balance, historical experience, and communications with customers, and provides a reserve when needed. Accounts receivable are written off when deemed uncollectible. The allowance for doubtful accounts was $672,000 and $115,000 at January 31, 2017 and 2016, respectively. Deferred Commissions The Company capitalizes commission costs that can be associated specifically with a non-cancelable subscription contract. Commissions are earned by sales personnel upon the execution of the sales contract by the customer, and commission payments are made shortly after they are earned. Deferred commissions are amortized over the term of the related non-cancelable customer contract. The Company capitalized commission costs of $4.5 million, $5.4 million and $3.2 million and amortized $4.0 million, $2.8 million and $1.4 million to sales and marketing expense in the accompanying consolidated statements of operations during the years ended January 31, 2017, 2016 and 2015, respectively. Research and Development Costs Research and development costs are expensed as incurred. Research and development costs consist primarily of compensation related costs incurred for the maintenance and bug fixing of the Company’s software platform, as well as planning, predevelopment and post implementation costs associated with the development of enhancements to the Company’s software platform. Advertising Costs Advertising costs are expensed as incurred and are included in sales and marketing expense in the accompanying consolidated statements of operations. Advertising expense totaled $446,000, $1.7 million and $360,000 for the years ended January 31, 2017, 2016 and 2015, respectively. Capitalized Software Development Costs The Company capitalizes certain development costs incurred in connection with software development for its cloud-based platform. Costs incurred in the preliminary stages of development are expensed as incurred. Once the software has reached the development stage, internal and external costs, if direct and incurred for adding incremental functionality to our platform, are capitalized until the software is substantially complete and ready for its intended use. Capitalization ceases upon completion of all substantial testing. These software development costs are recorded as part of property and equipment. Capitalized software development costs are amortized on a straight-line basis to cost of revenues—subscription services over the technology’s estimated useful life, which is two years. During the years ended January 31, 2017, 2016 and 2015, the Company capitalized $4.3 million, $3.2 million and $2.1 million, respectively, in software development costs. Software development costs incurred in the maintenance and minor upgrade and enhancement of software without adding additional functionality are expensed as incurred. Property and Equipment Property and equipment are stated at cost net of accumulated depreciation and amortization. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets. Furniture and equipment is amortized over an estimated useful life of three to five years. Leasehold improvements are amortized over the shorter of their useful life, estimated at five years, or the remaining term of the lease. Upon retirement or sale of assets, the cost and related accumulated depreciation and amortization are removed from the balance sheet and the resulting gain or loss is reflected in the statement of operations. Maintenance and repair costs are expensed as incurred. Goodwill and Other Intangible Assets Goodwill is the excess of costs over fair value of net assets of the business acquired. Goodwill and other intangible assets acquired that are determined to have an indefinite useful life are not amortized but are tested for impairment at least annually. Other intangible assets, which consist of acquired developed technology and customer relationships, are recorded at fair value, net of accumulated amortization, and are amortized using the straight-line method. The Company assesses the impairment of long-lived intangible assets whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. The Company has not recorded impairment charges on goodwill and other intangible assets for the periods presented in these consolidated financial statements. Revenue Recognition The Company derives its revenues primarily from subscription services fees and professional services fees. The Company sells subscriptions to its cloud platform through contracts that are typically three years in length. The arrangements do not contain general rights of return. The subscription contracts do not provide customers with the right to take possession of the software supporting the applications and, as a result, are accounted for as service contracts. The Company commences revenue recognition for its subscription services and professional services when all of the following criteria are met: • There is persuasive evidence of an arrangement; • The service has been or is being provided to the customer; • Collection of the fees is reasonably assured; and • The amount of fees to be paid by the customer is fixed or determinable. Subscription Services Revenues Subscription services revenues are recognized ratably over the contractual term of the arrangement beginning on the date that the service is made available to the customer, provided revenue recognized does not exceed amounts that are able to be invoiced, assuming all other revenue recognition criteria have been met. Professional Services Revenues Professional services are generally sold on a fixed-fee or time-and-materials basis. Revenue for time-and-material arrangements is recognized as the services are performed. For fixed‑fee and other types of arrangements entered into prior to the fourth quarter of the fiscal year ending January 31, 2017, professional services revenue was generally deferred and recognized upon the completion of the project under the completed performance method of accounting. During the fourth quarter of the fiscal year ending January 31, 2017, we developed the ability to accurately estimate professional services costs on a project basis. As such, revenue for fixed‑fee and other types of arrangements entered into after the third quarter of the fiscal year ending January 31, 2017 is recognized as services are performed under the proportional performance method of accounting. Multiple Deliverable Arrangements For arrangements with multiple deliverables, the Company evaluates whether the individual deliverables qualify as separate units of accounting. In order to treat deliverables in a multiple deliverable arrangement as separate units of accounting, the deliverables must have standalone value upon delivery. If the deliverables have standalone value upon delivery, the Company accounts for each deliverable separately, recognizing the respective revenue as the services are delivered. The Company has determined that its subscription services have standalone value, as the Company sells its subscriptions separately. The professional services related to the Company’s subscription services also have standalone value as numerous partners are trained to perform these professional services and these partners have a history of contracting directly with customers and successfully completing deployments of the Company’s software platform. When multiple deliverables included in an arrangement are separable into different units of accounting, the arrangement consideration is allocated to the identified units of accounting based on the relative selling price of each unit of accounting. Multiple deliverable arrangement accounting guidance provides a hierarchy when determining the relative selling price for each unit of accounting. Vendor-specific objective evidence (“VSOE”) of selling price, based on the price at which the item is regularly sold by the vendor on a standalone basis, should be used if it exists. If VSOE of selling price is not available, third-party evidence (“TPE”) of selling price is used to establish the selling price if it exists. VSOE and TPE do not currently exist for any of the Company’s deliverables. Accordingly, for arrangements with multiple deliverables that can be separated into different units of accounting, the relative selling price of each unit of accounting is based on best estimate of selling price (“BESP”). The Company determines the BESP for deliverables based on overall pricing objectives, which take into consideration market conditions and entity-specific factors. This includes a review of historical data related to the size of arrangements, the cloud applications being sold, customer demographics and the numbers and types of users within the arrangements. Cost of Subscription Services Revenue Cost of subscription services revenue consist primarily of expenses related to the hosting of the Company’s subscription service and supporting the Company’s customers. These expenses are comprised of third-party hosting expenses, amortization of intangible assets and personnel and related costs directly associated with the Company’s cloud infrastructure and cloud operations, including salaries, benefits, bonuses and stock-based compensation and allocated overhead. Overhead associated with facilities, information technology and depreciation, excluding depreciation related to the Company’s data center infrastructure, is allocated to the cost of revenue and operating expenses based on headcount by cost center. Cost of Professional Services Revenue Cost of professional services revenue consist primarily of personnel costs directly associated with deployment of the Company’s solution, including salaries, benefits, bonuses and stock-based compensation, travel costs and allocated overhead, and costs of subcontractors. Deferred Revenue Deferred revenue consists of customer billings or payments received in advance of the recognition of revenue and is recognized as revenue as the revenue recognition criteria are met. The Company generally invoices its customers annually for the forthcoming year of service. Accordingly, the Company’s deferred revenue balance does not include revenue for future years of multiple year non-cancellable contracts that have not yet been billed. Income Taxes The Company accounts for income taxes under the asset and liability method, which requires that deferred income taxes be provided for temporary differences between the financial reporting and tax basis of the Company’s assets and liabilities. In addition, deferred tax assets are recorded for the future benefit from the utilization of net operating losses and research and development credit carryforwards. A valuation allowance is provided against deferred tax assets unless it is more likely than not that they will be realized. The Company’s policy for accounting for uncertainty in income taxes requires the evaluation of tax positions taken or expected to be taken in the course of the preparation of tax returns to determine whether the tax positions are “more-likely-than-not” of being sustained by the applicable tax authority. Tax positions not deemed to meet the more-likely-than-not threshold would be recorded as a tax expense in the current year. The Company recognizes interest and penalties related to unrecognized tax benefits as income tax expense. Since the date of adoption of accounting for uncertain tax positions, the Company has accrued immaterial interest and penalties associated with unrecognized tax benefits for all periods presented. Preferred Stock Warrant Liability The Company’s freestanding warrants to purchase the Company’s convertible preferred stock were classified as liabilities on the consolidated balance sheets and recorded at fair value because these warrants may obligate the Company to transfer assets to the warrant holders at a future date under certain circumstances, such as a change in control, and because of a clause that modifies the number of shares of the warrants to compensate the holder in the event that the Company issues certain securities below the warrant exercise price per share. The warrants were subject to remeasurement to fair value at each balance sheet date, and any change in fair value was recognized in the consolidated statements of operations as other expense, net. Preferred stock warrants were exercised during the fiscal years ended January 31, 2017 and 2016 and any related preferred stock warrant liability was remeasured to fair value through the exercise date, and the remaining liability was reclassified to stockholders’ equity. Stock-Based Compensation The Company measures and recognizes stock-based compensation expense for all stock-based awards, including grants of stock, restricted stock units (“RSU”) and options to purchase stock, made to employees, outside directors and consultants based on estimated fair values. The Company uses the Black-Scholes option pricing model to value its options at the date of grant based on certain assumptions. The Company recognizes stock-based compensation for grants that vest based on only a service condition using the straight-line single-option approach. The Company recognizes stock-based expenses related to shares issued pursuant to its 2016 Employee Stock Purchase Plan (“ESPP”) on a straight-line basis over the offering period, which is 24 months. For RSUs granted before the IPO, the Company began recording stock-based compensation expense upon its IPO using the graded-vesting method because these awards vested upon satisfaction of both a service and a performance condition. For RSUs granted following its IPO, the Company recognizes stock-based compensation using the straight-line method. The fair value of an RSU is measured using the fair value of the Company’s common stock on the date of the grant. The Company recognizes stock-based compensation expense from market-based awards using the graded-vesting method. The fair value of such awards is determined using a Monte Carlo simulation approach. The Company records stock-based compensation expense from stock-based awards granted to non-employees at the estimated fair value of the awards upon vesting. The Company values options granted to non-employees using the Black-Scholes option pricing model. These awards are remeasured over their term until vested, exercised, cancelled or expired. Stock-based compensation expenses are recognized net of estimated forfeiture rate. The Company’s forfeiture rate is based on an analysis of its actual forfeitures. A higher (lower) revised forfeiture rate than previously estimated will result in an adjustment that will decrease (increase) the stock-based compensation expense recognized in the consolidated statement of operations. Comprehensive Loss Comprehensive loss is defined as the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources. The Company’s comprehensive loss is composed only of net loss. Recent Accounting Guidance Recently Adopted Accounting Pronouncements In September 2015, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments In April 2015, the FASB issued ASU No. 2015-05, Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement (“ASU 2015-05”) In August 2014, the FASB issued ASU No. 2014-15, Disclosures of Uncertainties About an Entity’s Ability to Continue as a Going Concern New Accounting Pronouncements Not Yet Adopted In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers Revenue Recognition Revenue Recognition-Construction-Type and Production-Type Contracts In February 2016, the FASB issued ASU No. 2016-02, Leases In March 2016, the FASB issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting In November 2016, the FASB issued a new accounting standard update on the presentation of restricted cash in the statement of cash flows. The new guidance requires an entity to show the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows, and an entity will no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents in the statement of cash flows. This guidance will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. Early adoption is permitted. The Company is evaluating the impact of adopting this new accounting standard update on the financial statements and related disclosures. In January 2017, the FASB issued a new accounting standard update on narrowing the definition of a business. The new guidance requires an entity to evaluate if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets; if so, the set of transferred assets and activities is not a business. The guidance also requires a business to include at least one substantive process and narrows the definition of outputs. This guidance will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. The Company is still evaluating the possibility to early adopt the new guidance. Adoption is expected to have no impact on the Company’s historical financial statements. In January 26, 2017, the FASB issued ASU 2017-04, Intangibles—Goodwill and Other Simplifying the Test for Goodwill Impairment

Business Combinations

Business Combinations	12 Months Ended
	Jan. 31, 2017
Business Combinations [Abstract]
Business Combinations	Note 3. Business Combinations Acquisition in fiscal year ended January 31, 2017 On December 30, 2016, the Company acquired substantially all the assets of Spend360 International Limited (“Spend360”), a United Kingdom based company which helps transform outdated data classification processes that rely on humans for accuracy with a modern, digitized system that uses innovative technologies to classify data more quickly and accurately. The total purchase consideration of $10.1 million was paid in 94,241 shares of the Company’s common stock having a total fair value of $2.3 million and $7.8 million in cash of which $1.0 million is due twelve months after the acquisition date. The acquisition of Spend360 was accounted for in accordance with the acquisition method of accounting for business combinations with Coupa as the accounting acquirer. Under the acquisition method of accounting, the total purchase consideration is allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values, using information currently available to us. The Company expensed the related acquisition costs of $366,000 in general and administrative expenses in the accompanying consolidated statement of operations. Allocation of the purchase price of $10.1 million is as follows (in thousands): Amount Intangible assets $ 5,431 Deferred revenue (26 ) Goodwill 4,701 Total purchase price allocation $ 10,106 Intangible assets consist of developed technology. The estimated useful life and fair values of the developed technology is five years. The value of developed technology was estimated using the replacement cost method. The purchase price exceeded the fair value of identifiable intangible asset acquired, resulting in the recognition of goodwill. Goodwill is primarily attributable to expected synergies in our subscription offerings and cross-selling opportunities and is deductible for tax purposes. Additionally, in connection with the acquisition, the Company issued 56,304 shares of the Company’s restricted common stock with a total fair value of $1.4 million. The shares have service-based vesting requirements and the value has therefore been excluded from the purchase consideration. The related value will be recognized on a straight-line basis as compensation expense over the requisite service period over three years from the acquisition date. In addition, the Company will pay up to $1.0 million dependent on the cumulative revenue earned through December 2018 by the acquired business. The Company determined that there is an in-substance service period for an employee related to the potential future payment and therefore will record this amount as compensation expense if it becomes payable. Pro forma results of operations have not been presented because the acquisition was not material to our results of operations. Acquisitions in fiscal year ended January 31, 2016 During the year ended January 31, 2016, the Company completed acquisitions which were accounted for as business combinations. The total purchase consideration of $2.9 million (paid in 213,050 shares of the Company’s common stock having a total fair value of $1.3 million, cash of $1.4 million, net of cash acquired, and $150,000 due between twelve and eighteen months after each respective acquisition date) for the acquisitions was preliminarily allocated as follows: $1.6 million to developed technologies and $74,000 to customer relationships based on their estimated fair values on the acquisition date. The excess $1.4 million of the purchase consideration over the fair value of net assets acquired was recorded as goodwill. One of the acquisitions had a net liabilities assumed amount of $242,000 at its acquisition date and the others had no acquired net tangible assets on the acquisition dates. Tax deductible goodwill resulting from one of these acquisitions was $91,000, with the remaining amounts not tax deductible for U.S. income tax purposes. Developed technologies and customer relationships will be amortized on a straight-line basis over their estimated useful lives of two years. These acquisitions generally enhance the breadth and depth of the Company’s offerings, as well as expanding the Company’s expertise in engineering and other functional areas. In connection with the acquisitions completed during the year ended January 31, 2016, the Company issued 101,336 shares of the Company’s restricted common stock with a total fair value of $572,000, which have service-based vesting requirements and are therefore excluded from the purchase consideration. The related values will be recognized on a straight-line basis as compensation expense over the requisite service period of two years from the acquisition dates. As of January 31, 2017 and January 31, 2016, 76,489 and 26,444 of the 101,336 restricted shares of common stock have vested, respectively. As part of one of the acquisitions, the Company agreed to pay up to $400,000 dependent on the revenue earned through September 2016 by the acquired business. In November 2016, the Company amended the agreement and agreed to extend the period for achieving results to September 2018. The Company determined that there is an in-substance service period for an employee related to the potential future payment and therefore will record this amount as compensation expense if it becomes payable. The results of operations for each of the acquisitions have been included in the Company’s consolidated statements of operations since the respective dates of acquisition. Actual and pro forma revenue and results of operations for the acquisitions have not been presented because they do not have a material impact to the consolidated revenue and results of operations, either individually or in aggregate.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Jan. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Note 4. Goodwill and Other Intangible Assets Goodwill The following table represents the changes in goodwill (in thousands): Balance at January 31, 2015 $ 174 Additions from acquisitions 1,431 Balance at January 31, 2016 1,605 Additions from acquisitions 4,701 Balance at January 31, 2017 $ 6,306 Other Intangible Assets The following table summarizes the other intangible asset balances (in thousands): As of January 31, 2017 2016 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Developed technology $ 7,210 $ (1,393 ) $ 5,817 $ 1,779 $ (478 ) $ 1,301 Customer relationships 74 (43 ) 31 74 (6 ) 68 Total other intangible assets $ 7,284 $ (1,436 ) $ 5,848 $ 1,853 $ (484 ) $ 1,369 Amortization expense related to other intangible assets was approximately $952,000, $387,000 and $53,000 for the years ended January 31, 2017, 2016 and 2015, respectively. As of January 31, 2017, the future amortization expense of other intangible assets is as follows (in thousands): Year Ending January 31, 2018 $ 1,600 2019 1,086 2020 1,086 2021 1,086 2022 990 Total $ 5,848 The Company, which has one reporting unit, performed an annual test for goodwill impairment during the fourth quarter of the years ended January 31, 2017 and 2016 and determined that goodwill was not impaired. In addition, there have been no significant events or circumstances affecting the valuation of goodwill subsequent to the Company’s annual assessment. Furthermore, no events or changes in circumstances have occurred to suggest that the carrying amounts for any of the Company’s long-lived assets or identifiable intangible assets may be non-recoverable. As such, the Company was not required to reevaluate the recoverability of its long-lived assets.

Property and Equipment, Net

Property and Equipment, Net	12 Months Ended
	Jan. 31, 2017
Property Plant And Equipment [Abstract]
Property and Equipment, Net	Note 5. Property and Equipment, Net Property and equipment consisted of the following (in thousands): As of January 31, 2017 2016 Furniture and equipment $ 1,415 $ 870 Software development costs 12,376 8,077 Leasehold improvements 458 414 Construction in progress — 238 Total property and equipment 14,249 9,599 Less: accumulated depreciation and amortization (9,607 ) (5,824 ) Property and equipment, net $ 4,642 $ 3,775 Depreciation and amortization expense related to property and equipment, excluding software development costs, was approximately $432,000, $256,000 and $105,000 for the years ended January 31, 2017, 2016 and 2015, respectively. Amortization expense related to software development costs was approximately $3.3 million, $2.2 million and $1.2 million for the years ended January 31, 2017, 2016 and 2015, respectively.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Jan. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 6. Fair Value Measurements Fair value is the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Subsequent changes in fair value of these financial assets and liabilities are recognized in earnings or other comprehensive income when they occur. When determining the fair value measurements for assets and liabilities which are required to be recorded at fair value, the Company considers the principal or most advantageous market in which the Company would transact and the market-based risk measurement or assumptions that market participants would use in pricing the assets or liabilities, such as inherent risk, transfer restrictions and credit risk. The Company applies the following fair value hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement: • Level 1—Quoted prices in active markets for identical assets or liabilities. • Level 2—Observable inputs other than quoted price in active markets for identical assets or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially full term of assets or liabilities. • Level 3—Inputs that are generally unobservable and typically reflect management’s estimates of assumptions that market participants would use in pricing the assets or liabilities. The following table summarizes the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis as of January 31, 2017 and 2016 (in thousands): January 31, 2017 Level 1 Level 2 Level 3 Total Financial assets: Money market funds (1) $ 178,245 $ — $ — $ 178,245 January 31, 2016 Financial assets: Money market funds (1) $ 50,044 $ — $ — $ 50,044 Financial liabilities: Preferred stock warrant liability (2) $ — $ — $ 247 $ 247 (1) Included in cash and cash equivalents (2) Included in accrued expenses and other current liabilities and other liabilities The preferred stock warrants were valued using a Black-Scholes option pricing model. See Note 10 for further discussion. The following table represents the change in the fair value of the preferred stock warrant liability (in thousands): Balance at January 31, 2015 $ 332 Exercise of convertible preferred stock warrant (275 ) Change in fair value 190 Balance at January 31, 2016 247 Change in fair value 627 Exercise of convertible preferred stock warrant (874 ) Balance at January 31, 2017 $ —

Accrued Expenses and Other Curr

Accrued Expenses and Other Current Liabilities	12 Months Ended
	Jan. 31, 2017
Payables And Accruals [Abstract]
Accrued Expenses and Other Current Liabilities	Note 7. Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consisted of the following (in thousands): As of January 31, 2017 2016 Accrued compensation $ 6,750 $ 6,605 Accrued other current liabilities 10,740 7,841 Total accrued expenses and other current liabilities $ 17,490 $ 14,446 Included in the accrued compensation liability caption for the year ended January 31, 2017, the Company had accrued $2.2 million of contributions received from employees for the 2016 employee stock purchase plan. For further information see Note 11.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Jan. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 8. Commitments and Contingencies Commitments The Company leases office space under non-cancelable operating leases with various expiration dates through September 2020. Rent expense, which is being recognized on a straight-line basis over the lease term, was $3.8 million, $2.4 million and $1.4 million during the years ended January 31, 2017, 2016 and 2015, respectively. The difference between the lease payments made and the lease expense recognized to date using the straight-line method is recorded as a liability and included within accrued expenses and other current liabilities in the accompanying consolidated balance sheet. Future minimum lease payments required under these agreements as of January 31, 2017 are as follows (in thousands): Year Ending January 31, 2018 $ 3,592 2019 3,354 2020 1,349 2021 331 2022 — Total $ 8,626 Contingencies From time to time the Company may become involved in legal proceedings or be subject to claims arising in the ordinary course of business. Although the results of litigation and claims cannot be predicted with certainty, the Company currently believes that the final outcome of these ordinary course matters will not have a material adverse effect on the Company’s business, operating results, financial condition or cash flows. Regardless of the outcome, litigation can have an adverse impact on the Company because of defense and settlement costs, diversion of management resources and other factors. Warranties and Indemnifications The Company’s cloud-based software platform and applications are typically warranted against material decreases in functionality and to perform in a manner consistent with general industry standards and in accordance with the Company’s on-line documentation under normal use and circumstances. The Company includes service level commitments to its customers, typically regarding certain levels of uptime reliability and performance and if the Company fails to meet those levels, customers can receive credits and in some cases, terminate their relationship with the Company. To date, the Company has not incurred any material costs as a result of such commitments. The Company generally agrees to defend and indemnify its customers against legal claims that the Company’s platform infringes certain patents, copyrights or other intellectual property rights of third parties. To date, the Company has not been required to make any payment resulting from such infringement claims and has not recorded any related liabilities.

Convertible Preferred Stock

Convertible Preferred Stock	12 Months Ended
	Jan. 31, 2017
Temporary Equity Disclosure [Abstract]
Convertible Preferred Stock	Note 9. Convertible Preferred Stock In October 2016, the Company completed its initial public offering of 8,510,000 shares of its common stock, including the full underwriters’ over-allotment option, at a public offering price of $18.00 per share. Net cash proceeds from the initial public offering were approximately $137.2 million. Prior to the initial public offering on October 6, 2016, the Company had convertible preferred stock outstanding, all of which was converted into 34,610,979 shares of common stock in connection with the initial public offering.

Preferred Stock Warrants

Preferred Stock Warrants	12 Months Ended
	Jan. 31, 2017
Preferred Stock Warrants [Abstract]
Preferred Stock Warrants	Note 10. Preferred Stock Warrants The Company previously issued Series D and Series E preferred stock warrants. On November 1, 2016, the Series D warrants were exercised for 36,971 shares of common stock. During the year ended January 31, 2016, the Series E warrant was exercised for 160,523 shares of Series E convertible preferred stock. The related preferred stock warrant liability was remeasured to fair value through the exercise date, and the remaining liability was reclassified to equity. As of January 31, 2017, no preferred stock warrants were outstanding. To determine the fair value of the convertible preferred stock warrants, the Company first derived the business enterprise value (“BEV”) of the Company using valuation methods, including a combination of methods, as deemed appropriate under the circumstances applicable at each valuation date. Once the Company determined an estimated BEV, the option pricing method (“OPM”) or a hybrid of the probability weighted expected return method (“PWERM”) and OPM was used to allocate the BEV to the various classes of the Company’s equity, including the Company’s preferred stock. Once the per share value of preferred stock was determined, the concluded per share value was the fair value of the shares input within the Black-Scholes option pricing model that was utilized to determine the fair value of the convertible preferred stock warrants. In addition to the fair value of the shares input, the Black-Scholes option pricing model includes assumptions related to the exercise price, expected volatility, expected term, risk-free interest rate, and the expected dividend yield. The estimated expected volatility was derived from historical volatilities of several unrelated publicly listed peer companies over a period approximately equal to the remaining term of the warrants. When making the selections of the Company’s industry peer companies to be used in the volatility calculation, the Company considered the size and operational and economic similarities to the Company’s principle business operations. The estimated expected term represents either the lesser of (i) the remaining contractual term of the warrants or (ii) the remaining term under probable scenarios used to determine the fair value of the underlying stock. The risk-free interest rate was based on the U.S. Treasury yield for a term consistent with the estimated expected term. The significant unobservable inputs used in the fair value measurement of the convertible preferred stock warrant liability are the fair value of the underlying stock at the valuation date, the expected volatility, and the estimated term of the warrants. Generally, increases (decreases) in the fair value of the underlying stock, expected volatility and expected term would result in a directionally similar impact to the fair value measurement. The warrants were valued using the Black-Scholes option pricing model which included the following assumptions: October 31, January 31, 2016 2016 (unaudited) Term in years 0 to 5.45 1.50 to 5.69 Risk-free interest rate 0.05 to 1.35% 0.61 to 1.45% Volatility 48% 48% Dividend yield 0% 0%

Common Stock and Stockholders_

Common Stock and Stockholders’ Equity (Deficit)	12 Months Ended
	Jan. 31, 2017
Equity [Abstract]
Common Stock and Stockholders’ Equity (Deficit)	Note 11. Common Stock and Stockholders’ Equity (Deficit) Common Stock Each share of common stock has the right to one vote. The holders of the common stock are also entitled to receive dividends whenever funds are legally available and when declared by the Board of Directors, subject to the prior rights of holders of all classes of stock outstanding having priority rights as to dividends. No dividends have been declared or paid since inception. Preferred Stock As of January 31, 2017, the Company had authorized 25,000,000 shares of preferred stock, par value $0.0001, of which no shares were issued and outstanding. 2016 Equity Incentive Plan The 2016 Equity Incentive Plan, or 2016 Plan, was approved by the Company’s stockholders in September 2016. The 2016 Plan provides for the grant of incentive stock options, nonstatutory stock options, restricted stock, restricted stock units, stock appreciation rights and performance cash awards. Awards could be granted under the 2016 Plan beginning on the effective date of the registration statement, October 5, 2016. The 2016 Plan replaced the Company’s 2006 Stock Plan, however awards outstanding under the 2006 Stock Plan will continue to be governed by their existing terms. The Company has reserved 4,500,000 shares of its common stock for issuance under the 2016 Plan, plus up to 13,750,000 shares subject to awards outstanding under its 2006 Plan on October 5, 2016, that subsequently expire, lapse unexercised, are forfeited or are repurchased by the Company. The number of shares reserved for issuance under the 2016 Plan will automatically increase on the first day of each fiscal year during the term of the 2016 Plan by a number of shares equal to 5% of its outstanding shares of common stock on the last day of the prior fiscal year. The number and class of shares reserved under the Company’s 2016 Plan will be adjusted in the event of a stock split, stock dividend or other changes in its capitalization. The following table summarizes stock option activity under the Company’s 2006 Stock Plan and the 2016 Plan during the year ended January 31, 2017 (aggregate intrinsic value in thousands): Options Outstanding Outstanding Stock Options Weighted- Average Exercise Price Weighted- Average Remaining Contractual (in years) Aggregate Intrinsic Value Balance, January 31, 2016 9,543,966 $ 2.84 8.08 $ 47,658 Option grants 5,573,721 $ 9.75 Options exercised (1,184,708 ) $ 3.59 Options forfeited (916,577 ) $ 4.72 Balance, January 31, 2017 13,016,402 $ 5.60 7.92 $ 265,542 Vested and expected to vest at January 31, 2017 12,043,481 $ 5.34 7.84 $ 248,821 Exercisable at January 31, 2017 6,859,340 $ 3.63 7.18 $ 153,406 The options exercisable as of January 31, 2017 include options that are exercisable prior to vesting. The aggregate intrinsic value of options vested and expected to vest and exercisable as of January 31, 2017 is calculated based on the difference between the exercise price and the fair value of the Company’s common stock as of January 31, 2017. The aggregate intrinsic value of exercised options was $11.0 million, $5.5 million and $2.6 million for the years ended January 31, 2017, 2016 and 2015, respectively, and is calculated based on the difference between the exercise price and the fair value of the Company’s common stock as of the exercise date. The weighted-average grant date fair value of options granted for the years ended January 31, 2017, 2016 and 2015 was $4.65, $2.28 and $1.24 per share, respectively. The total grant date fair options 5.8 n 1.2 n For the years ended January 31, 2017 and 2016, 83,500 and 16,250 options were granted to non-employees, respectively. Early Exercises of Stock Options Certain option grants under the 2006 Stock Plan are allowed to be exercised prior to vesting. The unvested shares of common stock exercised are subject to the Company’s right to repurchase at the lower of the original exercise price or the fair market value of the share at the time the repurchase right is exercised. Early exercises of options are not deemed to be substantive exercises for accounting purposes and accordingly, amounts received for early exercises are initially recorded in accrued expenses and other current liabilities and reclassified to additional paid-in capital as the underlying shares vest. At January 31, 2017 and 2016, the Company had $2.6 million and $1.1 million, respectively, recorded in accrued expenses and other current liabilities related to early exercises of stock options, and the related number of unvested shares subject to repurchase was 255,529 and 208,008, respectively. Restricted Stock Units (“RSUs”) The following table summarizes the activity related to the Company’s RSUs: Number of RSUs Outstanding Weighted-Average Grant Date Fair Value Awarded and unvested at January 31, 2016 62,500 $ 5.20 Awards granted 52,466 $ 26.12 Awards vested (27,343 ) $ 5.36 Awards forfeited (9,740 ) $ 12.14 Awarded and unvested at January 31, 2017 77,883 $ 18.38 2016 Employee Stock Purchase Plan The board of directors adopted the 2016 Employee Stock Purchase Plan, or ESPP, in September 2016 and it has been approved by the Company’s stockholders. The ESPP allows eligible employees to purchase shares of common stock through payroll deductions and is intended to qualify under Section 423 of the Internal Revenue Code. The Company has reserved 818,750 shares of its common stock for issuance under the ESPP. The number of shares reserved for issuance under the ESPP will automatically increase on the first day of each fiscal year during the term of the ESPP by a number of shares equal to the least of (i) 1% of its outstanding shares of common stock on the last day of the prior fiscal year, (ii) 1,250,000 shares or (iii) a lesser number of shares determined by the board of directors. The number and class of shares reserved under the ESPP will be adjusted in the event of a stock split, stock dividend or other changes in its capitalization. Each offering period will last a number of months determined by the administrator, up to a maximum of 27 months. The initial offering period began on the effective date of IPO, October 5, 2016, and ends on September 15, 2018, and new 24 month offering periods will begin on each March 16 and September 16 thereafter. Currently each offering period consists of four consecutive purchase periods, of approximately 6 months duration, at the end of which payroll contributions are used to purchase shares of the Company’s common stock. Participants may purchase Company’s common stock through payroll deductions, up to a maximum of 15% of their eligible compensation. Participants may withdraw from the ESPP and receive a refund of their accumulated payroll contributions at any time prior to a purchase date. Unless changed by the administrator, the purchase price for each share of common stock purchased under the ESPP will be 85% of the lower of the fair market value per share on the first day of the applicable offering period (or, in the case of the initial offering period, the price at which one share of common stock is offered to the public in its IPO) or the fair market value per share on the applicable purchase date. As of January 31, 2017, no shares of common stock were purchased under the 2016 ESPP. The Company selected the Black-Scholes option-pricing model as the method for determining the estimated fair value for the Company’s 2016 ESPP. As of January 31, 2017, total unrecognized compensation cost related to 2016 ESPP was $8.1 million, net of estimated forfeitures, which will be amortized over a weighted-average period of 1.62 years. Market-based Options In September 2016, the Board of Directors of the Company granted 544,127 stock options to the Chief Executive Officer (2016 CEO Grant) under the 2006 Equity Plan with an exercise price of $13.04 per share. The 2016 CEO Grant is eligible to vest based on the achievement of stock price appreciation targets after the consummation of the initial public offering, as well as continuous service over a four-year period following the grant date. The fair value of the 2016 CEO Grant was determined using a Monte Carlo simulation approach. The Company amortizes the fair value of the option award using the graded-vesting method, adjusted for estimated forfeitures. For the year ended January 31, 2017, the total stock-based compensation expense recognized was $417,000. As of January 31, 2017, one of three performance-based milestones has been achieved, resulting in 18,137 shares being vested and exercisable at January 31, 2017. Stock-based Compensation The Company’s total stock-based compensation expense was as follows (in thousands): For the year ended January 31, 2017 2016 2015 Cost of revenue: Subscription services $ 715 $ 235 $ 109 Professional services and other 772 1,014 110 Research and development 1,766 1,236 337 Sales and marketing 3,130 1,347 433 General and administrative 3,069 6,736 818 Total $ 9,452 $ 10,568 $ 1,807 Stock-based compensation capitalized in capitalized software development costs was $224,000 and $125,000 at January 31, 2017 and 2016, respectively. Of the total stock-based compensation expenses, costs recognized for options granted to non-employees were immaterial for all periods presented. As of January 31, 2017 there was approximately $22.7 million of total unrecognized compensation cost related to unvested stock options granted to employees and non-employee service providers under the 2006 Stock Plan and 2016 Equity Incentive Plan. This unrecognized compensation cost is expected to be recognized over an estimated weighted-average amortization period of approximately 2.66 years. The fair values of the Company’s stock options granted during the years ended January 31, 2017, 2016 and 2015 were estimated using the following assumptions: For the year ended January 31, 2017 2016 2015 Employee Stock Options Expected term (years) 6.00 5.70 - 6.00 6.08 Volatility 48% 48% 48% - 52% Weighted average volatility 48% 48% 51% Risk-free interest rate 1.27% - 2.08% 1.62% - 1.94% 1.80% - 2.00% Dividend yield 0% 0% 0% Employee Stock Purchase Plan Expected term (years) 0.41 - 1.91 — — Volatility 48% — — Weighted average volatility 48% — — Risk-free interest rate 0.48% - 0.81% — — Dividend yield 0% — — Market-Based Options Expected term (years) 7.36 — — Volatility 48% — — Weighted average volatility 48% — — Risk-free interest rate 1.61% — — Dividend yield 0% — — These assumptions and estimates are as follows: • Fair Value of Common Stock . Prior to the initial public offering, the fair value of the shares of common stock underlying stock options has been established by the Company’s board of directors, which was responsible for these estimates, and had been based in part upon a valuation provided by a third-party valuation firm. Because there has been no public market for the Company’s common stock, its board of directors considered this independent valuation and other factors, including, but not limited to, revenue growth, the current status of the technical and commercial success of its operations, its financial condition, the stage of development and competition to establish the fair value of the Company’s common stock at the time of grant of the option. After the initial public offering, the Company used the publicly quoted price as reported on the Nasdaq Global Select Market as the fair value of its common stock. • Expected Term . The expected term represents the weighted-average period that the stock options are expected to remain outstanding. To determine the expected term, the Company generally applies the simplified approach in which the expected term of an award is presumed to be the mid-point between the vesting date and the expiration date of the award as the Company does not have sufficient historical exercise data to provide a reasonable basis for an estimate of expected term. • Risk-Free Interest Rate . The Company bases the risk-free interest rate on the yields of U.S. Treasury securities with maturities approximately equal to the term of employee stock option awards. • Expected Volatility . As the Company does not have an extensive trading history for its common stock, the expected volatility for its common stock has been estimated by taking the average historic price volatility for industry peers based on daily price observations over a period equivalent to the expected term of the stock option awards. Industry peers consist of several public companies in its industry which are either similar in size, stage of life cycle or financial leverage.

Income Taxes

Income Taxes	12 Months Ended
	Jan. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Note 12. Income Taxes The following table presents the domestic and foreign components of loss before provision for income taxes for the periods presented (in thousands): For the year ended January 31, 2017 2016 2015 United States $ (38,926 ) $ (46,850 ) $ (27,541 ) Foreign 2,167 1,029 342 Loss before provision for income taxes $ (36,759 ) $ (45,821 ) $ (27,199 ) The provision for income taxes is composed of the following (in thousands): For the year ended January 31, 2017 2016 2015 Current income taxes: Federal $ — $ — $ — State 82 22 17 Foreign 976 308 80 Total current income taxes 1,058 330 97 Deferred income taxes: Federal 13 5 4 State 1 — — Foreign (224 ) — — Total deferred income taxes (210 ) 5 4 Total provision for income taxes $ 848 $ 335 $ 101 The effective tax rate differs from the federal statutory rate as follows: For the year ended January 31, 2017 2016 2015 Federal statutory income tax rate 34.0 % 34.0 % 34.0 % State tax, net of federal benefit 2.60 2.70 2.70 Change in valuation allowance (36.20 ) (32.00 ) (35.40 ) Stock-based compensation (2.70 ) (6.30 ) (0.40 ) Other non-deductible items (1.80 ) (0.40 ) (1.06 ) Foreign rate differential (1.40 ) (0.40 ) (0.24 ) Tax credits 3.20 1.70 — Total (2.3 )% (0.7 )% (0.4 )% The difference between the U.S. federal statutory tax rate of 34% and the Company’s effective tax rate in all periods presented is primarily due to a full valuation allowance related to the Company’s U.S. and Canada deferred tax assets offset by foreign tax expense on the Company’s profitable foreign operations. Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The following table presents the significant components of the Company’s deferred tax assets and liabilities for the periods presented (in thousands): As of January 31, 2017 2016 Deferred tax assets: Net operating loss carryforwards $ 49,100 $ 38,049 Accruals and reserves 1,164 2,196 Stock-based compensation 3,388 1,256 Tax credits 2,233 1,074 Gross deferred tax assets 55,885 42,575 Valuation allowance (54,615 ) (41,484 ) Total deferred tax assets, net of valuation allowance 1,270 1,091 Deferred tax liabilities: Fixed assets and intangibles assets (1,072 ) (1,104 ) Gross deferred tax liabilities (1,072 ) (1,104 ) Net deferred tax assets (liabilities) $ 198 $ (13 ) A valuation allowance is provided for deferred tax assets where the recoverability of the assets is uncertain. The determination to provide a valuation allowance is dependent upon the assessment of whether it is more likely than not that sufficient future taxable income will be generated to utilize the deferred tax assets. Based on the weight of the available evidence, which includes the Company’s historical operating losses, lack of taxable income, and the accumulated deficit, the Company provided a full valuation allowance against the U.S. and international deferred tax assets resulting from the tax loss and credits carried forward. The valuation allowance increased by $13.1million, $14.6 million and $10.1 million during the years ended January 31, 2017, 2016 and 2015, respectively. The Company has not provided for U.S. Federal and State income taxes, nor foreign withholding taxes, on the undistributed earnings of its foreign subsidiaries because the Company intends to reinvest such earnings indefinitely. As of January 31, 2017, the Company had net operating loss carryforwards of approximately $151.1 million and $86.1 million available to reduce future taxable income, if any, for federal and state income tax purposes, respectively. The U.S. federal and California state net operating loss carryforwards will begin to expire in 2026 and 2029, respectively. The federal and state net operating losses include $19.3 million and $11.6 million of excess tax benefit from stock option exercises that will result in increases to additional paid in capital, when realized. As of January 31, 2017, the Company had research and development credit carryforwards of approximately $3.5 million and $3.6 million available to reduce its future tax liability, if any, for federal and California state income tax purposes, respectively. The federal credit carryforwards begin to expire in 2031. California credit carryforwards have no expiration date. As of January 31, 2017, the Company has U.S. federal foreign tax credits carryforwards of $660,000 that will begin to expire in 2025. Federal and state laws impose restrictions on the utilization of net operating loss carryforwards and R&D credit carryforwards in the event of a change in ownership of the Company, which constitutes an ‘ownership change’ as defined by Internal Revenue Code Section 382 and 383. The Company experienced an ownership change in the past that does not materially impact the availability of its net operating losses and tax credits. The credit amounts indicated above reflect a reduction of approximately $3.5 million of net operating losses as a result of previous ownership changes that the Company experienced. Nevertheless, should there be ownership change in the future, the Company’s ability to utilize existing carryforwards could be substantially restricted. The Company accounts for uncertainty in income taxes in accordance with ASC 740. Tax positions are evaluated in a two-step process, whereby the Company first determines whether it is more likely than not that a tax position will be sustained upon examination by the tax authority, including resolutions of any related appeals or litigation processes, based on technical merit. If a tax position meets the more-likely-than-not recognition threshold it is then measured to determine the amount of benefit to recognized in the financial statements. The tax position is measured as the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement. The following table summarizes the activity related to unrecognized tax benefits (in thousands): For the year ended January 31, 2017 2016 2015 Unrecognized tax benefit—beginning of year $ 3,304 $ 2,846 $ — Gross increases —prior year tax positions 224 6 1,351 Gross increases — current year tax positions 1,913 452 1,495 Unrecognized tax benefit—end of year $ 5,441 $ 3,304 $ 2,846 All but $122,000 of the unrecognized tax benefits as of January 31, 2017 are accounted for as a reduction in the Company’s deferred tax assets. All of the unrecognized tax benefits as of January 31, 2016 are accounted for as a reduction in the Company deferred tax assets. Due to the Company’s valuation allowance, only $122,000 of the $5.4 million of unrecognized tax benefits would affect the Company’s effective tax rate, if recognized. The Company does not believe it is reasonably possible that its unrecognized tax benefits will significantly change in the next twelve months. The Company recognizes interest and penalties related to unrecognized tax benefits as income tax expense. There was immaterial accrued interest and penalties related to unrecognized tax benefits as of January 31, 2017 and 2016. The Company’s material income tax jurisdictions are the United States (federal) and California. As a result of net operating loss carryforwards, the Company is subject to audits for tax years 2006 and forward for federal purposes and 2009 and forward for California purposes. There are tax years which remain subject to examination in various other jurisdictions that are not material to the Company’s financial statements.

Net Loss per Share Attributable

Net Loss per Share Attributable to Common Stockholders	12 Months Ended
	Jan. 31, 2017
Earnings Per Share [Abstract]
Net Loss per Share Attributable to Common Stockholders	Note 13. Net Loss per Share Attributable to Common Stockholders Basic net loss per share attributable to common stockholders is calculated by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period, without consideration for potentially dilutive securities as they do not share in losses. During periods when the Company is in a net loss position, basic net loss per share attributable to common stockholders is the same as diluted net loss per share attributable to common stockholders as the effects of potentially dilutive securities are antidilutive given the net loss of the Company. The following table sets forth the computation of the basic and diluted net loss per share attributable to common stockholders during the years ended January 31, 2017, 2016 and 2015 (in thousands, except per share amounts): January 31, 2017 2016 2015 Numerator: Net loss attributable to common stockholders $ (37,607 ) $ (46,156 ) $ (27,300 ) Denominator: Weighted-average common shares outstanding 19,988 4,704 2,999 Net loss per share attributable to common stockholders, basic and diluted $ (1.88 ) $ (9.81 ) $ (9.10 ) Since the Company was in a loss position for all periods presented, basic net loss per share attributable to common stockholders 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. Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows: As of January 31, 2017 2016 2015 Convertible preferred stock as converted — 34,610,979 29,666,693 Options to purchase common stock 13,016,402 9,543,966 7,591,950 RSUs 77,883 62,500 — Unvested common shares subject to repurchase 335,116 283,524 335,502 Shares committed under 2016 ESPP 144,685 — — Convertible preferred stock warrants — 36,971 197,494 Total 13,574,086 44,537,940 37,791,639

Business Segment Information

Business Segment Information	12 Months Ended
	Jan. 31, 2017
Segment Reporting [Abstract]
Business Segment Information	Note 14. Business Segment Information The Company’s chief operating decision maker is the Chief Executive Officer (“CEO”). The CEO reviews the financial information presented on a consolidated basis for purposes of allocating resources and evaluating the Company’s financial performance. Accordingly, the Company has determined that it operates in a single reporting segment: cloud platform.

Employee Benefit Plan

Employee Benefit Plan	12 Months Ended
	Jan. 31, 2017
Compensation And Retirement Disclosure [Abstract]
Employee Benefit Plan	Note 15. Employee Benefit Plan The Company maintained a qualified defined contribution plan under Section 401(k) of the Internal Revenue Code. Under the 401(k) Plan, participating employees may elect to contribute up to 90% of their eligible compensation, subject to certain limitations. The Company matches certain percentages of employee contributions. Both employee and employer contributions vest immediately upon contribution. During the years ended January 31, 2017, 2016 and 2015, the Company’s contributions to the 401(k) Plan amounted to approximately $1.4 million, $1.5 million and $85,000, respectively.

Related Parties

Related Parties	12 Months Ended
	Jan. 31, 2017
Related Party Transactions [Abstract]
Related Parties	Note 16. Related Parties One of the Company’s customers, T. Rowe Associates, Inc., is an investment adviser of certain of the Company’s stockholders. For the period ended January 31, 2017, 2016 and 2015, the Company recognized subscription revenue of $509,000, $284,000, and zero from this customer, respectively. The Company had no outstanding receivable as of January 31, 2017 and $3,000 as of January 31, 2016, respectively.

Significant Accounting Polici24

Significant Accounting Policies (Policies)	12 Months Ended
	Jan. 31, 2017
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements have been prepared using accounting principles generally accepted in the United States of America (“GAAP”). The consolidated financial statements include the results of the Company and its wholly owned subsidiaries. All significant intercompany transactions and balances have been eliminated during consolidation.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. On an ongoing basis, management evaluates its significant estimates including the valuation of accounts receivable, the lives of tangible and intangible assets, stock-based compensation, stock warrants, revenue recognition, the valuation of acquired intangible assets, and provisions for income taxes. Management bases its estimates on historical experience and on various other market-specific and relevant assumptions that management believes to be reasonable under the circumstances. Actual results could differ from those estimates and such differences could be material to the financial position and results of operations.
Segment Information	Segment Information The Company’s chief operating decision maker is the Chief Executive Officer (“CEO”). The CEO reviews the financial information presented on a consolidated basis for purposes of allocating resources and evaluating the Company’s financial performance. Accordingly, the Company has determined that it operates in a single reporting segment; cloud platform.
Foreign Currency Translation	Foreign Currency Translation The functional currency for the Company’s foreign operations is the U.S. dollar. Foreign currency transaction gains and losses are included in the consolidated statements of operations for the period in other expense, net. All assets and liabilities denominated in a foreign currency are translated into U.S. dollars at the exchange rate prevailing on the balance sheet date. Revenues and expenses are translated at the transaction spot rate. For the years ended January 31, 2017, 2016 and 2015, foreign currency transaction gains and losses were comprised of a net loss of $638,000, $789,000 and $166,000, respectively.
Risks and Uncertainties	Risks and Uncertainties The Company’s services are concentrated in an industry which is characterized by significant competition, rapid technological advances and changes in customer requirements and industry standards. The success of the Company depends on management’s ability to anticipate and respond quickly and adequately to technological developments in the industry and changes in customer requirements and industry standards. Any significant delays in the development or introduction of services could have a material adverse effect on the Company’s business and operating results. Furthermore, the effects of potential legal activity that could be brought against the Company, including costs incurred to defend legal cases, relationships with customers and market perception, and the financial impact of any judicial decisions, could have a material adverse effect on the Company’s business and operating results. The Company serves customers and users from data center facilities operated by a single third party, located in the U.S., Singapore, Ireland, Germany and Australia. The Company has internal procedures to restore services in the event of disasters at the current data center facilities. Even with these procedures for disaster recovery in place, cloud applications could be significantly interrupted during the procedures to restore services.
Concentration of Risk and Significant Customers	Concentration of Risk and Significant Customers Financial instruments that potentially subject the Company to a concentration of credit risk consist of cash and cash equivalents and accounts receivable. Cash deposits may, at times, exceed amounts insured by the Federal Deposit Insurance Corporation (“FDIC”) and the Securities Investor Protection Corporation (“SIPC”). The Company has not experienced any losses on its deposits of cash and cash equivalents to date. No customer balance comprised 10% or more of total accounts receivable at January 31, 2017 or 2016. During the years ended January 31, 2017, 2016 and 2015, revenues by geographic area, based on billing addresses of the customers, was as follows: For the year ended January 31, 2017 2016 2015 United States $ 90,449 $ 60,411 $ 38,091 Foreign countries 43,326 23,267 12,754 Total revenues $ 133,775 $ 83,678 $ 50,845 No single foreign country represented more than 10% of the Company’s revenues in any period. Additionally, no single customer represented more than 10% of the Company’s revenues in any period.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company’s financial instruments include cash and money market funds, trade receivables, accounts payable and preferred stock warrants. Cash and cash equivalents and warrants are reported at fair value. The recorded carrying amount of trade receivables and accounts payable approximates their fair value due to their short-term nature.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all highly liquid investments purchased with original maturities of less than three months from the date of purchase to be cash equivalents. The Company’s cash and cash equivalents consist of monies held in bank demand deposits and money market funds and are presented at fair market value based on quoted market prices.
Accounts Receivable and Allowance for Doubtful Accounts	Accounts Receivable and Allowance for Doubtful Accounts The Company extends credit to its customers in the normal course of business, and does not require cash collateral or other security to support the collection of customer receivables. The Company estimates the amount of uncollectible accounts receivable at the end of each reporting period based on the aging of the receivable balance, historical experience, and communications with customers, and provides a reserve when needed. Accounts receivable are written off when deemed uncollectible. The allowance for doubtful accounts was $672,000 and $115,000 at January 31, 2017 and 2016, respectively.
Deferred Commissions	Deferred Commissions The Company capitalizes commission costs that can be associated specifically with a non-cancelable subscription contract. Commissions are earned by sales personnel upon the execution of the sales contract by the customer, and commission payments are made shortly after they are earned. Deferred commissions are amortized over the term of the related non-cancelable customer contract. The Company capitalized commission costs of $4.5 million, $5.4 million and $3.2 million and amortized $4.0 million, $2.8 million and $1.4 million to sales and marketing expense in the accompanying consolidated statements of operations during the years ended January 31, 2017, 2016 and 2015, respectively.
Research and Development Costs	Research and Development Costs Research and development costs are expensed as incurred. Research and development costs consist primarily of compensation related costs incurred for the maintenance and bug fixing of the Company’s software platform, as well as planning, predevelopment and post implementation costs associated with the development of enhancements to the Company’s software platform.
Advertising Costs	Advertising Costs Advertising costs are expensed as incurred and are included in sales and marketing expense in the accompanying consolidated statements of operations. Advertising expense totaled $446,000, $1.7 million and $360,000 for the years ended January 31, 2017, 2016 and 2015, respectively.
Capitalized Software Development Costs	Capitalized Software Development Costs The Company capitalizes certain development costs incurred in connection with software development for its cloud-based platform. Costs incurred in the preliminary stages of development are expensed as incurred. Once the software has reached the development stage, internal and external costs, if direct and incurred for adding incremental functionality to our platform, are capitalized until the software is substantially complete and ready for its intended use. Capitalization ceases upon completion of all substantial testing. These software development costs are recorded as part of property and equipment. Capitalized software development costs are amortized on a straight-line basis to cost of revenues—subscription services over the technology’s estimated useful life, which is two years. During the years ended January 31, 2017, 2016 and 2015, the Company capitalized $4.3 million, $3.2 million and $2.1 million, respectively, in software development costs. Software development costs incurred in the maintenance and minor upgrade and enhancement of software without adding additional functionality are expensed as incurred.
Property and Equipment	Property and Equipment Property and equipment are stated at cost net of accumulated depreciation and amortization. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets. Furniture and equipment is amortized over an estimated useful life of three to five years. Leasehold improvements are amortized over the shorter of their useful life, estimated at five years, or the remaining term of the lease. Upon retirement or sale of assets, the cost and related accumulated depreciation and amortization are removed from the balance sheet and the resulting gain or loss is reflected in the statement of operations. Maintenance and repair costs are expensed as incurred.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill is the excess of costs over fair value of net assets of the business acquired. Goodwill and other intangible assets acquired that are determined to have an indefinite useful life are not amortized but are tested for impairment at least annually. Other intangible assets, which consist of acquired developed technology and customer relationships, are recorded at fair value, net of accumulated amortization, and are amortized using the straight-line method. The Company assesses the impairment of long-lived intangible assets whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. The Company has not recorded impairment charges on goodwill and other intangible assets for the periods presented in these consolidated financial statements.
Revenue Recognition	Revenue Recognition The Company derives its revenues primarily from subscription services fees and professional services fees. The Company sells subscriptions to its cloud platform through contracts that are typically three years in length. The arrangements do not contain general rights of return. The subscription contracts do not provide customers with the right to take possession of the software supporting the applications and, as a result, are accounted for as service contracts. The Company commences revenue recognition for its subscription services and professional services when all of the following criteria are met: • There is persuasive evidence of an arrangement; • The service has been or is being provided to the customer; • Collection of the fees is reasonably assured; and • The amount of fees to be paid by the customer is fixed or determinable. Subscription Services Revenues Subscription services revenues are recognized ratably over the contractual term of the arrangement beginning on the date that the service is made available to the customer, provided revenue recognized does not exceed amounts that are able to be invoiced, assuming all other revenue recognition criteria have been met. Professional Services Revenues Professional services are generally sold on a fixed-fee or time-and-materials basis. Revenue for time-and-material arrangements is recognized as the services are performed. For fixed‑fee and other types of arrangements entered into prior to the fourth quarter of the fiscal year ending January 31, 2017, professional services revenue was generally deferred and recognized upon the completion of the project under the completed performance method of accounting. During the fourth quarter of the fiscal year ending January 31, 2017, we developed the ability to accurately estimate professional services costs on a project basis. As such, revenue for fixed‑fee and other types of arrangements entered into after the third quarter of the fiscal year ending January 31, 2017 is recognized as services are performed under the proportional performance method of accounting. Multiple Deliverable Arrangements For arrangements with multiple deliverables, the Company evaluates whether the individual deliverables qualify as separate units of accounting. In order to treat deliverables in a multiple deliverable arrangement as separate units of accounting, the deliverables must have standalone value upon delivery. If the deliverables have standalone value upon delivery, the Company accounts for each deliverable separately, recognizing the respective revenue as the services are delivered. The Company has determined that its subscription services have standalone value, as the Company sells its subscriptions separately. The professional services related to the Company’s subscription services also have standalone value as numerous partners are trained to perform these professional services and these partners have a history of contracting directly with customers and successfully completing deployments of the Company’s software platform. When multiple deliverables included in an arrangement are separable into different units of accounting, the arrangement consideration is allocated to the identified units of accounting based on the relative selling price of each unit of accounting. Multiple deliverable arrangement accounting guidance provides a hierarchy when determining the relative selling price for each unit of accounting. Vendor-specific objective evidence (“VSOE”) of selling price, based on the price at which the item is regularly sold by the vendor on a standalone basis, should be used if it exists. If VSOE of selling price is not available, third-party evidence (“TPE”) of selling price is used to establish the selling price if it exists. VSOE and TPE do not currently exist for any of the Company’s deliverables. Accordingly, for arrangements with multiple deliverables that can be separated into different units of accounting, the relative selling price of each unit of accounting is based on best estimate of selling price (“BESP”). The Company determines the BESP for deliverables based on overall pricing objectives, which take into consideration market conditions and entity-specific factors. This includes a review of historical data related to the size of arrangements, the cloud applications being sold, customer demographics and the numbers and types of users within the arrangements.
Cost of Subscription Services Revenue	Cost of Subscription Services Revenue Cost of subscription services revenue consist primarily of expenses related to the hosting of the Company’s subscription service and supporting the Company’s customers. These expenses are comprised of third-party hosting expenses, amortization of intangible assets and personnel and related costs directly associated with the Company’s cloud infrastructure and cloud operations, including salaries, benefits, bonuses and stock-based compensation and allocated overhead. Overhead associated with facilities, information technology and depreciation, excluding depreciation related to the Company’s data center infrastructure, is allocated to the cost of revenue and operating expenses based on headcount by cost center.
Cost of Professional Services Revenue	Cost of Professional Services Revenue Cost of professional services revenue consist primarily of personnel costs directly associated with deployment of the Company’s solution, including salaries, benefits, bonuses and stock-based compensation, travel costs and allocated overhead, and costs of subcontractors.
Deferred Revenue	Deferred Revenue Deferred revenue consists of customer billings or payments received in advance of the recognition of revenue and is recognized as revenue as the revenue recognition criteria are met. The Company generally invoices its customers annually for the forthcoming year of service. Accordingly, the Company’s deferred revenue balance does not include revenue for future years of multiple year non-cancellable contracts that have not yet been billed.
Income Taxes	Income Taxes The Company accounts for income taxes under the asset and liability method, which requires that deferred income taxes be provided for temporary differences between the financial reporting and tax basis of the Company’s assets and liabilities. In addition, deferred tax assets are recorded for the future benefit from the utilization of net operating losses and research and development credit carryforwards. A valuation allowance is provided against deferred tax assets unless it is more likely than not that they will be realized. The Company’s policy for accounting for uncertainty in income taxes requires the evaluation of tax positions taken or expected to be taken in the course of the preparation of tax returns to determine whether the tax positions are “more-likely-than-not” of being sustained by the applicable tax authority. Tax positions not deemed to meet the more-likely-than-not threshold would be recorded as a tax expense in the current year. The Company recognizes interest and penalties related to unrecognized tax benefits as income tax expense. Since the date of adoption of accounting for uncertain tax positions, the Company has accrued immaterial interest and penalties associated with unrecognized tax benefits for all periods presented.
Preferred Stock Warrant Liability	Preferred Stock Warrant Liability The Company’s freestanding warrants to purchase the Company’s convertible preferred stock were classified as liabilities on the consolidated balance sheets and recorded at fair value because these warrants may obligate the Company to transfer assets to the warrant holders at a future date under certain circumstances, such as a change in control, and because of a clause that modifies the number of shares of the warrants to compensate the holder in the event that the Company issues certain securities below the warrant exercise price per share. The warrants were subject to remeasurement to fair value at each balance sheet date, and any change in fair value was recognized in the consolidated statements of operations as other expense, net. Preferred stock warrants were exercised during the fiscal years ended January 31, 2017 and 2016 and any related preferred stock warrant liability was remeasured to fair value through the exercise date, and the remaining liability was reclassified to stockholders’ equity.
Stock-Based Compensation	Stock-Based Compensation The Company measures and recognizes stock-based compensation expense for all stock-based awards, including grants of stock, restricted stock units (“RSU”) and options to purchase stock, made to employees, outside directors and consultants based on estimated fair values. The Company uses the Black-Scholes option pricing model to value its options at the date of grant based on certain assumptions. The Company recognizes stock-based compensation for grants that vest based on only a service condition using the straight-line single-option approach. The Company recognizes stock-based expenses related to shares issued pursuant to its 2016 Employee Stock Purchase Plan (“ESPP”) on a straight-line basis over the offering period, which is 24 months. For RSUs granted before the IPO, the Company began recording stock-based compensation expense upon its IPO using the graded-vesting method because these awards vested upon satisfaction of both a service and a performance condition. For RSUs granted following its IPO, the Company recognizes stock-based compensation using the straight-line method. The fair value of an RSU is measured using the fair value of the Company’s common stock on the date of the grant. The Company recognizes stock-based compensation expense from market-based awards using the graded-vesting method. The fair value of such awards is determined using a Monte Carlo simulation approach. The Company records stock-based compensation expense from stock-based awards granted to non-employees at the estimated fair value of the awards upon vesting. The Company values options granted to non-employees using the Black-Scholes option pricing model. These awards are remeasured over their term until vested, exercised, cancelled or expired. Stock-based compensation expenses are recognized net of estimated forfeiture rate. The Company’s forfeiture rate is based on an analysis of its actual forfeitures. A higher (lower) revised forfeiture rate than previously estimated will result in an adjustment that will decrease (increase) the stock-based compensation expense recognized in the consolidated statement of operations.
Comprehensive Loss	Comprehensive Loss Comprehensive loss is defined as the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources. The Company’s comprehensive loss is composed only of net loss.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In September 2015, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments In April 2015, the FASB issued ASU No. 2015-05, Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement (“ASU 2015-05”) In August 2014, the FASB issued ASU No. 2014-15, Disclosures of Uncertainties About an Entity’s Ability to Continue as a Going Concern
New Accounting Pronouncements Not Yet Adopted	New Accounting Pronouncements Not Yet Adopted In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers Revenue Recognition Revenue Recognition-Construction-Type and Production-Type Contracts In February 2016, the FASB issued ASU No. 2016-02, Leases In March 2016, the FASB issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting In November 2016, the FASB issued a new accounting standard update on the presentation of restricted cash in the statement of cash flows. The new guidance requires an entity to show the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows, and an entity will no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents in the statement of cash flows. This guidance will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. Early adoption is permitted. The Company is evaluating the impact of adopting this new accounting standard update on the financial statements and related disclosures. In January 2017, the FASB issued a new accounting standard update on narrowing the definition of a business. The new guidance requires an entity to evaluate if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets; if so, the set of transferred assets and activities is not a business. The guidance also requires a business to include at least one substantive process and narrows the definition of outputs. This guidance will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. The Company is still evaluating the possibility to early adopt the new guidance. Adoption is expected to have no impact on the Company’s historical financial statements. In January 26, 2017, the FASB issued ASU 2017-04, Intangibles—Goodwill and Other Simplifying the Test for Goodwill Impairment

Significant Accounting Polici25

Significant Accounting Policies (Tables)	12 Months Ended
	Jan. 31, 2017
Accounting Policies [Abstract]
Revenues by Geographic Area	During the years ended January 31, 2017, 2016 and 2015, revenues by geographic area, based on billing addresses of the customers, was as follows: For the year ended January 31, 2017 2016 2015 United States $ 90,449 $ 60,411 $ 38,091 Foreign countries 43,326 23,267 12,754 Total revenues $ 133,775 $ 83,678 $ 50,845

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
	Jan. 31, 2017
Business Combinations [Abstract]
Allocation of Purchase Price	The Company expensed the related acquisition costs of $366,000 in general and administrative expenses in the accompanying consolidated statement of operations. Allocation of the purchase price of $10.1 million is as follows (in thousands): Amount Intangible assets $ 5,431 Deferred revenue (26 ) Goodwill 4,701 Total purchase price allocation $ 10,106

Goodwill and Other Intangible27

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Jan. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Changes in Goodwill	The following table represents the changes in goodwill (in thousands): Balance at January 31, 2015 $ 174 Additions from acquisitions 1,431 Balance at January 31, 2016 1,605 Additions from acquisitions 4,701 Balance at January 31, 2017 $ 6,306
Summary of Other Intangible Asset Balances	The following table summarizes the other intangible asset balances (in thousands): As of January 31, 2017 2016 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Developed technology $ 7,210 $ (1,393 ) $ 5,817 $ 1,779 $ (478 ) $ 1,301 Customer relationships 74 (43 ) 31 74 (6 ) 68 Total other intangible assets $ 7,284 $ (1,436 ) $ 5,848 $ 1,853 $ (484 ) $ 1,369
Future Amortization Expense of Other Intangible Assets	As of January 31, 2017, the future amortization expense of other intangible assets is as follows (in thousands): Year Ending January 31, 2018 $ 1,600 2019 1,086 2020 1,086 2021 1,086 2022 990 Total $ 5,848

Property and Equipment, Net (Ta

Property and Equipment, Net (Tables)	12 Months Ended
	Jan. 31, 2017
Property Plant And Equipment [Abstract]
Property and Equipment	Property and equipment consisted of the following (in thousands): As of January 31, 2017 2016 Furniture and equipment $ 1,415 $ 870 Software development costs 12,376 8,077 Leasehold improvements 458 414 Construction in progress — 238 Total property and equipment 14,249 9,599 Less: accumulated depreciation and amortization (9,607 ) (5,824 ) Property and equipment, net $ 4,642 $ 3,775

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Jan. 31, 2017
Fair Value Disclosures [Abstract]
Summary of Fair Value Hierarchy for Financial Assets and Liabilities Measured at Fair Value on Recurring Basis	The following table summarizes the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis as of January 31, 2017 and 2016 (in thousands): January 31, 2017 Level 1 Level 2 Level 3 Total Financial assets: Money market funds (1) $ 178,245 $ — $ — $ 178,245 January 31, 2016 Financial assets: Money market funds (1) $ 50,044 $ — $ — $ 50,044 Financial liabilities: Preferred stock warrant liability (2) $ — $ — $ 247 $ 247 (1) Included in cash and cash equivalents (2) Included in accrued expenses and other current liabilities and other liabilities
Change in Fair Value of Preferred Stock Warrant Liability	The following table represents the change in the fair value of the preferred stock warrant liability (in thousands): Balance at January 31, 2015 $ 332 Exercise of convertible preferred stock warrant (275 ) Change in fair value 190 Balance at January 31, 2016 247 Change in fair value 627 Exercise of convertible preferred stock warrant (874 ) Balance at January 31, 2017 $ —

Accrued Expenses and Other Cu30

Accrued Expenses and Other Current Liabilities (Tables)	12 Months Ended
	Jan. 31, 2017
Payables And Accruals [Abstract]
Summary of Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities consisted of the following (in thousands): As of January 31, 2017 2016 Accrued compensation $ 6,750 $ 6,605 Accrued other current liabilities 10,740 7,841 Total accrued expenses and other current liabilities $ 17,490 $ 14,446

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Jan. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Future Minimum Lease Payments Under Non Cancellable Operating Leases	Future minimum lease payments required under these agreements as of January 31, 2017 are as follows (in thousands): Year Ending January 31, 2018 $ 3,592 2019 3,354 2020 1,349 2021 331 2022 — Total $ 8,626

Preferred Stock Warrants (Table

Preferred Stock Warrants (Tables)	12 Months Ended
	Jan. 31, 2017
Preferred Stock Warrants [Abstract]
Valuation of Warrants using Black-Scholes Option Pricing Model	The warrants were valued using the Black-Scholes option pricing model which included the following assumptions: October 31, January 31, 2016 2016 (unaudited) Term in years 0 to 5.45 1.50 to 5.69 Risk-free interest rate 0.05 to 1.35% 0.61 to 1.45% Volatility 48% 48% Dividend yield 0% 0%

Common Stock and Stockholders33

Common Stock and Stockholders’ Equity (Deficit) (Tables)	12 Months Ended
	Jan. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Stock Option Activity	The following table summarizes stock option activity under the Company’s 2006 Stock Plan and the 2016 Plan during the year ended January 31, 2017 (aggregate intrinsic value in thousands): Options Outstanding Outstanding Stock Options Weighted- Average Exercise Price Weighted- Average Remaining Contractual (in years) Aggregate Intrinsic Value Balance, January 31, 2016 9,543,966 $ 2.84 8.08 $ 47,658 Option grants 5,573,721 $ 9.75 Options exercised (1,184,708 ) $ 3.59 Options forfeited (916,577 ) $ 4.72 Balance, January 31, 2017 13,016,402 $ 5.60 7.92 $ 265,542 Vested and expected to vest at January 31, 2017 12,043,481 $ 5.34 7.84 $ 248,821 Exercisable at January 31, 2017 6,859,340 $ 3.63 7.18 $ 153,406
Summary of Activity Related to RSUs	The following table summarizes the activity related to the Company’s RSUs: Number of RSUs Outstanding Weighted-Average Grant Date Fair Value Awarded and unvested at January 31, 2016 62,500 $ 5.20 Awards granted 52,466 $ 26.12 Awards vested (27,343 ) $ 5.36 Awards forfeited (9,740 ) $ 12.14 Awarded and unvested at January 31, 2017 77,883 $ 18.38
Total Stock-Based Compensation Expense	The Company’s total stock-based compensation expense was as follows (in thousands): For the year ended January 31, 2017 2016 2015 Cost of revenue: Subscription services $ 715 $ 235 $ 109 Professional services and other 772 1,014 110 Research and development 1,766 1,236 337 Sales and marketing 3,130 1,347 433 General and administrative 3,069 6,736 818 Total $ 9,452 $ 10,568 $ 1,807
Assumptions used to Estimate Fair Values of Stock Options Granted	The fair values of the Company’s stock options granted during the years ended January 31, 2017, 2016 and 2015 were estimated using the following assumptions: For the year ended January 31, 2017 2016 2015 Employee Stock Options Expected term (years) 6.00 5.70 - 6.00 6.08 Volatility 48% 48% 48% - 52% Weighted average volatility 48% 48% 51% Risk-free interest rate 1.27% - 2.08% 1.62% - 1.94% 1.80% - 2.00% Dividend yield 0% 0% 0% Employee Stock Purchase Plan Expected term (years) 0.41 - 1.91 — — Volatility 48% — — Weighted average volatility 48% — — Risk-free interest rate 0.48% - 0.81% — — Dividend yield 0% — — Market-Based Options Expected term (years) 7.36 — — Volatility 48% — — Weighted average volatility 48% — — Risk-free interest rate 1.61% — — Dividend yield 0% — —

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Jan. 31, 2017
Income Tax Disclosure [Abstract]
Summary of Domestic and Foreign Components of Loss Before Provision for Income Taxes	The following table presents the domestic and foreign components of loss before provision for income taxes for the periods presented (in thousands): For the year ended January 31, 2017 2016 2015 United States $ (38,926 ) $ (46,850 ) $ (27,541 ) Foreign 2,167 1,029 342 Loss before provision for income taxes $ (36,759 ) $ (45,821 ) $ (27,199 )
Summary of Provision for Income Taxes	The provision for income taxes is composed of the following (in thousands): For the year ended January 31, 2017 2016 2015 Current income taxes: Federal $ — $ — $ — State 82 22 17 Foreign 976 308 80 Total current income taxes 1,058 330 97 Deferred income taxes: Federal 13 5 4 State 1 — — Foreign (224 ) — — Total deferred income taxes (210 ) 5 4 Total provision for income taxes $ 848 $ 335 $ 101
Summary of Differences Between Effective Tax Rate and Federal Statutory Rate	The effective tax rate differs from the federal statutory rate as follows: For the year ended January 31, 2017 2016 2015 Federal statutory income tax rate 34.0 % 34.0 % 34.0 % State tax, net of federal benefit 2.60 2.70 2.70 Change in valuation allowance (36.20 ) (32.00 ) (35.40 ) Stock-based compensation (2.70 ) (6.30 ) (0.40 ) Other non-deductible items (1.80 ) (0.40 ) (1.06 ) Foreign rate differential (1.40 ) (0.40 ) (0.24 ) Tax credits 3.20 1.70 — Total (2.3 )% (0.7 )% (0.4 )%
Summary of Significant Components of Company's Deferred Tax Assets and Liabilities	The following table presents the significant components of the Company’s deferred tax assets and liabilities for the periods presented (in thousands): As of January 31, 2017 2016 Deferred tax assets: Net operating loss carryforwards $ 49,100 $ 38,049 Accruals and reserves 1,164 2,196 Stock-based compensation 3,388 1,256 Tax credits 2,233 1,074 Gross deferred tax assets 55,885 42,575 Valuation allowance (54,615 ) (41,484 ) Total deferred tax assets, net of valuation allowance 1,270 1,091 Deferred tax liabilities: Fixed assets and intangibles assets (1,072 ) (1,104 ) Gross deferred tax liabilities (1,072 ) (1,104 ) Net deferred tax assets (liabilities) $ 198 $ (13 )
Summary of Activity Related to Unrecognized Tax Benefits	The following table summarizes the activity related to unrecognized tax benefits (in thousands): For the year ended January 31, 2017 2016 2015 Unrecognized tax benefit—beginning of year $ 3,304 $ 2,846 $ — Gross increases —prior year tax positions 224 6 1,351 Gross increases — current year tax positions 1,913 452 1,495 Unrecognized tax benefit—end of year $ 5,441 $ 3,304 $ 2,846

Net Loss per Share Attributab35

Net Loss per Share Attributable to Common Stockholders (Tables)	12 Months Ended
	Jan. 31, 2017
Earnings Per Share [Abstract]
Computation of Basic and Diluted Net Loss per Share Attributable to Common Stockholders	The following table sets forth the computation of the basic and diluted net loss per share attributable to common stockholders during the years ended January 31, 2017, 2016 and 2015 (in thousands, except per share amounts): January 31, 2017 2016 2015 Numerator: Net loss attributable to common stockholders $ (37,607 ) $ (46,156 ) $ (27,300 ) Denominator: Weighted-average common shares outstanding 19,988 4,704 2,999 Net loss per share attributable to common stockholders, basic and diluted $ (1.88 ) $ (9.81 ) $ (9.10 )
Potentially Dilutive Securities Not Included in Diluted per Share Calculations	Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows: As of January 31, 2017 2016 2015 Convertible preferred stock as converted — 34,610,979 29,666,693 Options to purchase common stock 13,016,402 9,543,966 7,591,950 RSUs 77,883 62,500 — Unvested common shares subject to repurchase 335,116 283,524 335,502 Shares committed under 2016 ESPP 144,685 — — Convertible preferred stock warrants — 36,971 197,494 Total 13,574,086 44,537,940 37,791,639

Organization and Description 36

Organization and Description of Business - Additional Information (Details) - Initial Public Offering $ in Millions	Oct. 06, 2016USD ($)shares
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Issuance of common stock | shares	8,510,000
Net proceeds from initial public offering | $	$ 142.5
Initial public offering costs | $	$ 5.3
Preferred stock converted into common stock | shares	34,610,979

Significant Accounting Polici37

Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Jan. 31, 2017USD ($)Customer	Jan. 31, 2016USD ($)Customer	Jan. 31, 2015USD ($)Customer
Significant Accounting Policies [Line Items]
Net loss on foreign currency transaction	$ (638,000)	$ (789,000)	$ (166,000)
Allowance for doubtful accounts	672,000	115,000
Capitalized commission costs	4,500,000	5,400,000	3,200,000
Amortization of deferred commissions	4,004,000	2,834,000	1,384,000
Advertising expense	446,000	1,700,000	360,000
Capitalized software development cost	$ 4,300,000	$ 3,200,000	$ 2,100,000
2016 Employee Stock Purchase Plan
Significant Accounting Policies [Line Items]
Share based compensation expense recognition and offering period	24 months
Capitalized Software Development Costs
Significant Accounting Policies [Line Items]
Estimated useful life	2 years
Furniture and Equipment | Minimum
Significant Accounting Policies [Line Items]
Estimated useful life	3 years
Furniture and Equipment | Maximum
Significant Accounting Policies [Line Items]
Estimated useful life	5 years
Leasehold Improvements
Significant Accounting Policies [Line Items]
Estimated useful life	5 years
Accounts Receivable | Customer
Significant Accounting Policies [Line Items]
Number of customers comprising 10% or more of total accounts receivable | Customer	0	0
Revenue | Customer
Significant Accounting Policies [Line Items]
Number of customers comprising more than 10% of revenues | Customer	0	0	0
Revenue | Geographic Concentration Risk | Foreign Countries
Significant Accounting Policies [Line Items]
Number of customers comprising more than 10% of revenues | Customer	0	0	0

Significant Accounting Polici38

Significant Accounting Policies - Revenues by Geographic Area (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues	$ 133,775	$ 83,678	$ 50,845
United States
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues	90,449	60,411	38,091
Foreign Countries
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues	$ 43,326	$ 23,267	$ 12,754

Business Combinations - Additio

Business Combinations - Additional Information (Details) - USD ($)	Jan. 31, 2017	Dec. 30, 2016	Jan. 31, 2016	Jan. 31, 2017	Jan. 31, 2016
Acquired Finite Lived Intangible Assets [Line Items]
Business combination purchase consideration					$ 2,900,000
Number of common stock issued under purchase consideration					213,050
Stock issued during period, value acquisitions				$ 2,357,000	$ 1,269,000
Business combination, holdback amount			$ 150,000		$ 150,000
Finite-lived intangible asset, useful life					2 years
Business acquisition consideration paid in cash					$ 1,400,000
Business combination consideration arrangements description					paid in 213,050 shares of the Company’s common stock having a total fair value of $1.3 million, cash of $1.4 million, net of cash acquired, and $150,000 due between twelve and eighteen months after each respective acquisition date
Additions from acquisitions				$ 4,701,000	$ 1,431,000
Assumed net liabilities			242,000		242,000
Net tangible assets acquired			0		0
Business combination, recognized identifiable assets acquired and liabilities assumed, deferred tax liabilities			$ 91,000		91,000
Restricted Stock
Acquired Finite Lived Intangible Assets [Line Items]
Stock issued during period, value acquisitions					$ 572,000
Stock issued during period, shares acquisitions					101,336
Compensation expense over requisite service period					2 years
Number of shares vested	76,489		26,444
Maximum | Restricted Stock
Acquired Finite Lived Intangible Assets [Line Items]
Potential liability to be recognized due to earn out agreements			$ 400,000		$ 400,000
Developed technology
Acquired Finite Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired			1,600,000		1,600,000
Customer Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired			$ 74,000		$ 74,000
Spend360
Acquired Finite Lived Intangible Assets [Line Items]
Business combination purchase consideration		$ 10,100,000
Number of common stock issued under purchase consideration		94,241
Stock issued during period, value acquisitions		$ 2,300,000
Business combination, cash consideration including holdback amount		7,800,000
Business combination, holdback amount		1,000,000
Business combination consideration arrangements description				paid in 94,241 shares of the Company’s common stock having a total fair value of $2.3 million and $7.8 million in cash of which $1.0 million is due twelve months after the acquisition date.
Spend360 | Restricted Stock
Acquired Finite Lived Intangible Assets [Line Items]
Stock issued during period, value acquisitions		$ 1,400,000
Stock issued during period, shares acquisitions		56,304
Compensation expense over requisite service period		3 years
Spend360 | Maximum | Restricted Stock
Acquired Finite Lived Intangible Assets [Line Items]
Potential liability to be recognized due to earn out agreements		$ 1,000,000
Spend360 | Developed technology
Acquired Finite Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life		5 years
Spend360 | General and Administrative Expenses
Acquired Finite Lived Intangible Assets [Line Items]
Business combination acquisition related costs		$ 366,000

Business Combinations - Allocat

Business Combinations - Allocation of Purchase Price (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Dec. 30, 2016	Jan. 31, 2016	Jan. 31, 2015
Business Acquisition [Line Items]
Goodwill	$ 6,306		$ 1,605	$ 174
Spend360
Business Acquisition [Line Items]
Intangible assets		$ 5,431
Deferred revenue		(26)
Goodwill		4,701
Total purchase price allocation		$ 10,106

Goodwill and Other Intangible41

Goodwill and Other Intangible Assets - Changes in Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]
Beginning balance	$ 1,605	$ 174
Additions from acquisitions	4,701	1,431
Ending balance	$ 6,306	$ 1,605

Goodwill and Other Intangible42

Goodwill and Other Intangible Assets - Summary of Other Intangible Asset Balances (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2016
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 7,284	$ 1,853
Accumulated Amortization	(1,436)	(484)
Net Carrying Amount	5,848	1,369
Developed technology
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	7,210	1,779
Accumulated Amortization	(1,393)	(478)
Net Carrying Amount	5,817	1,301
Customer relationships
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	74	74
Accumulated Amortization	(43)	(6)
Net Carrying Amount	$ 31	$ 68

Goodwill and Other Intangible43

Goodwill and Other Intangible Assets - Additional Information (Details)	3 Months Ended		12 Months Ended
	Jan. 31, 2017USD ($)	Jan. 31, 2016USD ($)	Jan. 31, 2017USD ($)Segment	Jan. 31, 2016USD ($)	Jan. 31, 2015USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense related to other intangible assets			$ 952,000	$ 387,000	$ 53,000
Number of reporting unit | Segment			1
Goodwill impairment	$ 0	$ 0

Goodwill and Other Intangible44

Goodwill and Other Intangible Assets - Future Amortization Expense of Other Intangible Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]
2,018	$ 1,600
2,019	1,086
2,020	1,086
2,021	1,086
2,022	990
Net Carrying Amount	$ 5,848	$ 1,369

Property and Equipment, Net - P

Property and Equipment, Net - Property and Equipment (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2016
Property Plant And Equipment [Line Items]
Total property and equipment, gross	$ 14,249	$ 9,599
Less: accumulated depreciation and amortization	(9,607)	(5,824)
Property and equipment, net	4,642	3,775
Furniture and equipment
Property Plant And Equipment [Line Items]
Total property and equipment, gross	1,415	870
Software development costs
Property Plant And Equipment [Line Items]
Total property and equipment, gross	12,376	8,077
Leasehold improvements
Property Plant And Equipment [Line Items]
Total property and equipment, gross	$ 458	414
Construction in progress
Property Plant And Equipment [Line Items]
Total property and equipment, gross		$ 238

Property and Equipment, Net - A

Property and Equipment, Net - Additional Information (Details) - USD ($)	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Property Plant And Equipment [Abstract]
Depreciation and amortization expense excluding software development costs	$ 432,000	$ 256,000	$ 105,000
Amortization expense related to software development costs	$ 3,300,000	$ 2,200,000	$ 1,200,000

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Fair Value Hierarchy for Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair value measurements recurring - USD ($) $ in Thousands		Jan. 31, 2017	Jan. 31, 2016
Money market funds
Financial assets:
Money market funds	[1]	$ 178,245	$ 50,044
Preferred stock warrant liability
Financial liabilities:
Preferred stock warrant liability	[2]		247
Level 1 | Money market funds
Financial assets:
Money market funds	[1]	178,245	50,044
Level 2 | Money market funds
Financial assets:
Money market funds	[1]	$ 0	0
Level 2 | Preferred stock warrant liability
Financial liabilities:
Preferred stock warrant liability	[2]		0
Level 3 | Preferred stock warrant liability
Financial liabilities:
Preferred stock warrant liability	[2]		$ 247
[1]	Included in cash and cash equivalents
[2]	Included in accrued expenses and other current liabilities and other liabilities

Fair Value Measurements - Chang

Fair Value Measurements - Change in Fair Value of Preferred Stock Warrant Liability (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Change in fair value	$ (627)	$ (190)	$ (50)
Preferred stock warrant liability
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	247	332
Exercise of convertible preferred stock warrant	(874)	(275)
Change in fair value	$ 627	190
Ending Balance		$ 247	$ 332

Accrued Expenses and Other Cu49

Accrued Expenses and Other Current Liabilities - Summary of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2016
Payables And Accruals [Abstract]
Accrued compensation	$ 6,750	$ 6,605
Accrued other current liabilities	10,740	7,841
Total accrued expenses and other current liabilities	$ 17,490	$ 14,446

Accrued Expenses and Other Cu50

Accrued Expenses and Other Current Liabilities - Additional Information (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2016
Accrued Expenses And Other Current Liabilities [Line Items]
Accrued compensation	$ 6,750	$ 6,605
2016 Employee Stock Purchase Plan
Accrued Expenses And Other Current Liabilities [Line Items]
Accrued compensation	$ 2,200

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Non-cancelable operating leases expiration dates	through September 2020
Rent expense	$ 3.8	$ 2.4	$ 1.4

Commitments and Contingencies52

Commitments and Contingencies - Future Minimum Lease Payments Under Non Cancellable Operating Leases (Details) $ in Thousands	Jan. 31, 2017USD ($)
Commitments And Contingencies Disclosure [Abstract]
2,018	$ 3,592
2,019	3,354
2,020	1,349
2,021	331
2,022
Total	$ 8,626

Convertible Preferred Stock - A

Convertible Preferred Stock - Additional Information (Details) $ / shares in Units, $ in Millions	Oct. 06, 2016USD ($)$ / sharesshares
Temporary Equity [Line Items]
Net cash proceeds from the initial public offering | $	$ 137.2
Initial Public Offering
Temporary Equity [Line Items]
Issuance of common stock	8,510,000
Offering price per share | $ / shares	$ 18
Preferred stock converted into common stock	34,610,979

Preferred Stock Warrants - Addi

Preferred Stock Warrants - Additional Information (Details) - shares	Jan. 31, 2017	Nov. 01, 2016	Jan. 31, 2016
Class Of Warrant Or Right [Line Items]
Preferred stock warrants outstanding	0
Series D Warrants | Common Stock
Class Of Warrant Or Right [Line Items]
Exercise of warrants		36,971
Series E Warrant
Class Of Warrant Or Right [Line Items]
Exercise of warrants			160,523

Preferred Stock Warrants - Valu

Preferred Stock Warrants - Valuation of Warrants using Black-Scholes Option Pricing Model (Details) - Warrants	1 Months Ended	12 Months Ended
	Oct. 31, 2016	Jan. 31, 2016
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Volatility	48.00%	48.00%
Dividend yield	0.00%	0.00%
Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Term in years	0 years	1 year 6 months
Risk-free interest rate	0.05%	0.61%
Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Term in years	5 years 5 months 12 days	5 years 8 months 9 days
Risk-free interest rate	1.35%	1.45%

Common Stock and Stockholders'

Common Stock and Stockholders' Equity (Deficit) - Additional Information (Details)	1 Months Ended	12 Months Ended			132 Months Ended
	Sep. 30, 2016$ / sharesshares	Jan. 31, 2017USD ($)VotePeriod$ / sharesshares	Jan. 31, 2016USD ($)$ / sharesshares	Jan. 31, 2015USD ($)$ / shares	Jan. 31, 2017USD ($)Vote$ / sharesshares	Oct. 05, 2016shares
Class Of Stock [Line Items]
Common stock voting rights		Each share of common stock has the right to one vote.
Number of common stock voting rights | Vote		1			1
Dividends declared | $					$ 0
Dividends paid | $					$ 0
Preferred stock, shares authorized		25,000,000	0		25,000,000
Preferred stock, par value | $ / shares		$ 0.0001	$ 0.0001		$ 0.0001
Preferred stock, shares issued		0	0		0
Preferred stock, shares outstanding		0	0		0
Aggregate intrinsic value of exercised options | $		$ 11,000,000	$ 5,500,000	$ 2,600,000
Weighted-average grant date fair value of options granted | $ / shares		$ 4.65	$ 2.28	$ 1.24
Total grant date fair value of options vested | $		$ 5,800,000	$ 2,400,000	$ 1,200,000
Number of unvested shares subject to repurchase due to early exercises of options		255,529	208,008		255,529
Total stock-based compensation expense recognized | $		$ 9,452,000	$ 10,568,000	$ 1,807,000
2016 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Common stock reserved for issuance		818,750			818,750
Increase in number of shares reserved for issuance as percentage of outstanding shares of common stock on last day of prior fiscal year		1.00%
Increase in common stock reserved for issuance		1,250,000			1,250,000
Duration of maximum offering period		27 months
Initial offering period end date		Sep. 15, 2018
Duration of new offering period		24 months
Number of consecutive purchase periods | Period		4
Duration of consecutive purchase period		6 months
Maximum percentage of eligible compensation for participants to purchase common stock through payroll deductions		15.00%			15.00%
Purchase price for each share of common stock as percentage of lower of fair market value per share on first day of applicable offering period		85.00%
Number of shares of common stock purchased		0
Total unrecognized compensation cost | $		$ 8,100,000			$ 8,100,000
Total unrecognized compensation cost, weighted-average amortization period		1 year 7 months 13 days
Accrued Expenses and Other Current Liabilities
Class Of Stock [Line Items]
Early exercises of stock options | $		$ 2,600,000	1,100,000		$ 2,600,000
Capitalized Software Development Costs
Class Of Stock [Line Items]
Stock-based compensation capitalized in capitalized software development costs | $		$ 224,000	$ 125,000
Non-employee Consultants
Class Of Stock [Line Items]
Number of options granted		83,500	16,250
2016 Equity Incentive Plan
Class Of Stock [Line Items]
Common stock reserved for issuance						4,500,000
Increase in number of shares reserved for issuance as percentage of outstanding shares of common stock on last day of prior fiscal year		5.00%
2006 Plan
Class Of Stock [Line Items]
Common stock reserved for issuance						13,750,000
2006 Equity Plan | Chief Executive Officer | Market-based Options
Class Of Stock [Line Items]
Number of options granted	544,127
Stock options granted, exercise price | $ / shares	$ 13.04
Stock option vesting period	4 years
Total stock-based compensation expense recognized | $		$ 417,000
Stock option, number of shares vested and exercisable		18,137			18,137
2006 Stock Plan and 2016 Equity Incentive Plan
Class Of Stock [Line Items]
Number of options granted		5,573,721
Stock options granted, exercise price | $ / shares		$ 9.75
Total unrecognized compensation cost related to unvested stock options | $		$ 22,700,000			$ 22,700,000
2006 Stock Plan and 2016 Equity Incentive Plan | Stock Options
Class Of Stock [Line Items]
Total unrecognized compensation cost, weighted-average amortization period		2 years 7 months 28 days

Common Stock and Stockholders57

Common Stock and Stockholders' Equity (Deficit) - Summary of Stock Option Activity (Details) - 2006 Stock Plan and 2016 Plan - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Options, Outstanding, Beginning Balance	9,543,966
Stock Options, grants	5,573,721
Stock Options, exercised	(1,184,708)
Stock Options, forfeited	(916,577)
Stock Options, Outstanding, Ending Balance	13,016,402	9,543,966
Stock Options, Vested and expected to vest	12,043,481
Stock Options, Exercisable	6,859,340
Weighted-Average Exercise Price, Options Outstanding, Beginning Balance	$ 2.84
Weighted-Average Exercise Price, Option grants	9.75
Weighted-Average Exercise Price, Options exercised	3.59
Weighted-Average Exercise Price, Options forfeited	4.72
Weighted-Average Exercise Price, Options Outstanding, Ending Balance	5.60	$ 2.84
Weighted-Average Exercise Price, Vested and expected to vest	5.34
Weighted-Average Exercise Price, Exercisable	$ 3.63
Weighted-Average Remaining Contractual Life (n years), Options Outstanding	7 years 11 months 1 day	8 years 29 days
Weighted-Average Remaining Contractual Life (in years), Vested and expected to vest	7 years 10 months 2 days
Weighted-Average Remaining Contractual Life (in years), Exercisable	7 years 2 months 5 days
Aggregate Intrinsic Value, Options Outstanding	$ 265,542	$ 47,658
Aggregate Intrinsic Value, Vested and expected to vest	248,821
Aggregate Intrinsic Value, Exercisable	$ 153,406

Common Stock and Stockholders58

Common Stock and Stockholders' Equity (Deficit) - Summary of Activity Related to RSUs (Details) - 2016 Equity Incentive Plan - Restricted Stock Units (RSUs)	12 Months Ended
	Jan. 31, 2017$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of RSUs Outstanding, Awarded and unvested, Beginning balance | shares	62,500
Number of RSUs Outstanding, Awards granted | shares	52,466
Number of RSUs Outstanding, Awards vested | shares	(27,343)
Number of RSUs Outstanding, Awards forfeited | shares	(9,740)
Number of RSUs Outstanding, Awarded and unvested, Ending balance | shares	77,883
Weighted-Average Grant Date Fair Value, Awarded and unvested, Beginning balance | $ / shares	$ 5.20
Weighted-Average Grant Date Fair Value, Awards granted | $ / shares	26.12
Weighted-Average Grant Date Fair Value, Awards vested | $ / shares	5.36
Weighted-Average Grant Date Fair Value, Awards forfeited | $ / shares	12.14
Weighted-Average Grant Date Fair Value, Awarded and unvested, Ending balance | $ / shares	$ 18.38

Common Stock and Stockholders59

Common Stock and Stockholders' Equity (Deficit) - Total Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 9,452	$ 10,568	$ 1,807
Subscription services
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	715	235	109
Professional services and other
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	772	1,014	110
Research and development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	1,766	1,236	337
Sales and marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	3,130	1,347	433
General and administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 3,069	$ 6,736	$ 818

Common Stock and Stockholders60

Common Stock and Stockholders' Equity (Deficit) - Assumptions used to Estimate Fair Values of Stock Options Granted (Details)	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Employee Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (years)	6 years		6 years 29 days
Volatility	48.00%	48.00%
Volatility, minimum			48.00%
Volatility, maximum			52.00%
Weighted average volatility	48.00%	48.00%	51.00%
Risk-free interest rate, minimum	1.27%	1.62%	1.80%
Risk-free interest rate, maximum	2.08%	1.94%	2.00%
Dividend yield	0.00%	0.00%	0.00%
Employee Stock Options | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (years)		5 years 8 months 12 days
Employee Stock Options | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (years)		6 years
Market-Based Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (years)	7 years 4 months 10 days
Volatility	48.00%
Weighted average volatility	48.00%
Risk-free interest rate	1.61%
Dividend yield	0.00%
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Volatility	48.00%
Weighted average volatility	48.00%
Risk-free interest rate, minimum	0.48%
Risk-free interest rate, maximum	0.81%
Dividend yield	0.00%
Employee Stock Purchase Plan | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (years)	4 months 28 days
Employee Stock Purchase Plan | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (years)	1 year 10 months 28 days

Income Taxes - Summary of Domes

Income Taxes - Summary of Domestic and Foreign Components of Loss Before Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Income Tax Disclosure [Abstract]
United States	$ (38,926)	$ (46,850)	$ (27,541)
Foreign	2,167	1,029	342
Loss before provision for income taxes	$ (36,759)	$ (45,821)	$ (27,199)

Income Taxes - Summary of Provi

Income Taxes - Summary of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Current income taxes:
Federal	$ 0	$ 0	$ 0
State	82	22	17
Foreign	976	308	80
Total current income taxes	1,058	330	97
Deferred income taxes:
Federal	13	5	4
State	1
Foreign	(224)
Total deferred income taxes	(210)	5	4
Total provision for income taxes	$ 848	$ 335	$ 101

Income Taxes - Summary of Diffe

Income Taxes - Summary of Differences Between Effective Tax Rate and Federal Statutory Rate (Details)	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Income Tax Disclosure [Abstract]
Federal statutory income tax rate	34.00%	34.00%	34.00%
State tax, net of federal benefit	2.60%	2.70%	2.70%
Change in valuation allowance	(36.20%)	(32.00%)	(35.40%)
Stock-based compensation	(2.70%)	(6.30%)	(0.40%)
Other non-deductible items	(1.80%)	(0.40%)	(1.06%)
Foreign rate differential	(1.40%)	(0.40%)	(0.24%)
Tax credits	3.20%	1.70%
Total	(2.30%)	(0.70%)	(0.40%)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Income Tax [Line Items]
U.S. federal statutory tax rate	34.00%	34.00%	34.00%
Valuation allowance increased	$ 13,100,000	$ 14,600,000	$ 10,100,000
Unrecognized tax benefit would affect company's effective tax rate if recognized	122,000
Unrecognized tax benefits	$ 5,441,000	$ 3,304,000	$ 2,846,000
Income tax examination, description	As a result of net operating loss carryforwards, the Company is subject to audits for tax years 2006 and forward for federal purposes and 2009 and forward for California purposes.
California
Income Tax [Line Items]
Operating loss carryforwards expiration year	2,029
California | Research and Development
Income Tax [Line Items]
Tax credit carryforwards amount	$ 3,600,000
Federal
Income Tax [Line Items]
Net operating loss carryforwards	$ 151,100,000
Operating loss carryforwards expiration year	2,026
Excess tax benefit from stock option exercises included in net operating loss carryforwards	$ 19,300,000
Tax credit carryforwards expiration year	2,031
Reduction in operating loss carryforwards	$ 3,500,000
Federal | Research and Development
Income Tax [Line Items]
Tax credit carryforwards amount	3,500,000
State
Income Tax [Line Items]
Net operating loss carryforwards	86,100,000
Excess tax benefit from stock option exercises included in net operating loss carryforwards	11,600,000
Reduction in operating loss carryforwards	3,500,000
Foreign
Income Tax [Line Items]
Tax credit carryforwards amount	$ 660,000
Tax credit carryforwards expiration year	2,025

Income Taxes - Summary of Signi

Income Taxes - Summary of Significant Components of Company's Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2016
Deferred tax assets:
Net operating loss carryforwards	$ 49,100	$ 38,049
Accruals and reserves	1,164	2,196
Stock-based compensation	3,388	1,256
Tax credits	2,233	1,074
Gross deferred tax assets	55,885	42,575
Valuation allowance	(54,615)	(41,484)
Total deferred tax assets, net of valuation allowance	1,270	1,091
Deferred tax liabilities:
Fixed assets and intangibles assets	(1,072)	(1,104)
Gross deferred tax liabilities	(1,072)	(1,104)
Net deferred tax liabilities		$ (13)
Net deferred tax assets	$ 198

Income Taxes - Summary of Activ

Income Taxes - Summary of Activity Related to Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Income Tax Disclosure [Abstract]
Unrecognized tax benefit—beginning of year	$ 3,304	$ 2,846
Gross increases —prior year tax positions	224	6	$ 1,351
Gross increases — current year tax positions	1,913	452	1,495
Unrecognized tax benefit—end of year	$ 5,441	$ 3,304	$ 2,846

Net Loss per Share Attributab67

Net Loss per Share Attributable to Common Stockholders - Computation of Basic and Diluted Net Loss per Share Attributable to Common Stockholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Numerator:
Net loss attributable to common stockholders	$ (37,607)	$ (46,156)	$ (27,300)
Denominator:
Weighted-average number of shares used in computing net loss per share attributable to common stockholders, basic and diluted	19,988	4,704	2,999
Net loss per share attributable to common stockholders, basic and diluted	$ (1.88)	$ (9.81)	$ (9.10)

Net Loss per Share Attributab68

Net Loss per Share Attributable to Common Stockholders - Potentially Dilutive Securities Not Included in Diluted per Share Calculations (Details) - shares	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share	13,574,086	44,537,940	37,791,639
Convertible preferred stock as converted
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share		34,610,979	29,666,693
Employee Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share	13,016,402	9,543,966	7,591,950
RSUs
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share	77,883	62,500
Unvested common shares subject to repurchase
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share	335,116	283,524	335,502
Shares committed under 2016 ESPP
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share	144,685
Convertible preferred stock warrants
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share		36,971	197,494

Employee Benefit Plan - Additio

Employee Benefit Plan - Additional Information (Details) - USD ($)	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Compensation And Retirement Disclosure [Abstract]
Percentage of employees contribution to defined plan	90.00%
Company’s contributions to defined plan	$ 1,400,000	$ 1,500,000	$ 85,000

Related Parties - Additional In

Related Parties - Additional Information (Details) - USD ($)	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Related Party Transaction [Line Items]
Subscription revenue recognized	$ 117,788,000	$ 75,667,000	$ 43,051,000
Outstanding receivable	47,614,000	27,979,000
T. Rowe Associates, Inc.
Related Party Transaction [Line Items]
Subscription revenue recognized	509,000	284,000	$ 0
Outstanding receivable	$ 0	$ 3,000