| Summary of Significant Accounting Policies (Policies) | 12 Months Ended |
| Dec. 31, 2019 |
| Accounting Policies [Abstract] | |
| Basis of Presentation and Consolidation | Basis of Presentation and ConsolidationThe accompanying consolidated financial statements include our results of operations and those of our wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP). |
| Use of Estimates | Use of EstimatesThe preparation of consolidated financial statements in conformity with GAAP requires management to make estimates, judgments and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Significant items subject to such estimates and assumptions include the determination of the estimated economic life of perpetual licenses for revenue recognition, the determination of standalone selling prices in revenue transactions with multiple performance obligations, the estimated period of benefit for deferred contract acquisition and fulfillment costs, the useful lives of long-lived assets, the valuation of allowance for doubtful accounts, the valuation of stock-based compensation, the valuation of intangible assets acquired in a business combination, the incremental borrowing rate for operating leases and the valuation for deferred tax assets. We base our estimates on historical experience and on various other assumptions that we believe are reasonable. Actual results could differ from those estimates. |
| Revenue Recognition | Revenue Recognition We generate products revenue from the sale of (1) cloud-based subscriptions for our InsightIDR, InsightVM, InsightAppSec and InsightConnect products, (2) managed services offerings which utilize our products and (3) term or perpetual software licenses for our Nexpose, Metasploit and AppSpider products, and associated content subscriptions for our Nexpose and Metasploit products. We also generate appliance revenue that is included in our products revenue and is associated with hardware sold with our Nexpose product to certain customers. We generate maintenance and support revenue associated with customers’ purchases of our software licenses for Nexpose, Metasploit and AppSpider. We generate professional service revenue from the sale of our deployment and training services related to our solutions, incident response services, penetration testing and security advisory services. Our deployment services educate and assist our customers on the best use and best practices to deploy our solutions. We adopted Financial Accounting Standards Board (FASB) Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers (Topic 606) (ASC 606) on January 1, 2018 using the modified retrospective method. The adoption of ASC 606 resulted in a cumulative adjustment to increase our accumulated deficit by $25.9 million at January 1, 2018, which included a $0.9 million increase in deferred revenue and $0.4 million increase in deferred tax liabilities, offset by a $27.1 million increase in deferred contract asset and fulfillment costs. As a result of the adoption of ASC 606, the net loss on our consolidated statement of operations for the year ended December 31, 2018 was decreased by $0.6 million. The change in the net loss was primarily due to a $12.9 million decrease in sales and marketing expense, due to the capitalization of commissions, partially offset by a $11.8 million decrease in revenue, primarily due to a decrease in perpetual license revenue and a $0.3 million increase in provision to income taxes due additional deferred taxes for the temporary differences between the accounting and tax treatment of capitalized costs to obtain and fulfill a contract. The adoption of ASC 606 resulted in offsetting changes in operating assets and liabilities and had no impact on net cash flow from operations. We recognize revenue when a customer obtains control of promised products or services. The amount of revenue recognized reflects the consideration that we expect to be entitled to receive in exchange for these products or services. To achieve the core principle of this standard, we apply the following five steps: 1) Identify the contract with a customer We consider the terms and conditions of the contracts and our customary business practices in identifying our contracts. We determine we have a contract with a customer when the contract is approved, we can identify each party’s rights regarding the services to be transferred, we can identify the payment terms for the services, and we have determined the customer has the ability and intent to pay and the contract has commercial substance. We apply judgment in determining the customer’s ability and intent to pay, which is based on a variety of factors, including the customer’s historical payment experience or, in the case of a new customer, credit and financial information pertaining to the customer. 2) Identify the performance obligations in the contract Performance obligations promised in a contract are identified based on the products and services that will be transferred to the customer that are both capable of being distinct, whereby the customer can benefit from the product or service either on its own or together with other resources that are readily available from third parties or from us, and are distinct in the context of the contract, whereby the transfer of the products or services is separately identifiable from other promises in the contract. 3) Determine the transaction price The transaction price is determined based on the consideration to which we expect to be entitled in exchange for transferring products or services to the customer. Variable consideration is included in the transaction price if, in our judgment, it is probable that no significant future reversal of cumulative revenue under the contract will occur. In instances where the timing of revenue recognition differs from the timing of invoicing, we have determined our contracts generally do not include a significant financing component. The primary purpose of our invoicing terms is to provide customers with simplified and predictable ways of purchasing our products and services, not to receive financing from our customers or to provide customers with financing. Examples include invoicing at the beginning of a subscription term with revenue recognized ratably over the contract period. Sales through our channel network of distributors and resellers are generally discounted as compared to the price that we would sell to an end user. Revenue for sales through our channel network is recorded net of any distributor or reseller margin. 4) Allocate the transaction price to performance obligations in the contract If the contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Contracts that contain multiple performance obligations require an allocation of the transaction price to each performance obligation based on a relative standalone selling price (“SSP”). 5) Recognize revenue when or as we satisfy a performance obligation Revenue is recognized at the time the related performance obligation is satisfied by transferring the promised product or service to a customer. Revenue is recognized when control of the products or services are transferred to our customers, in an amount that reflects the consideration that we expect to receive in exchange for those products or services. Subscription Revenue Subscription revenue consists of revenue from our cloud-based subscription, managed services offerings and content subscriptions associated with our software licenses. • We generate cloud-based subscription revenue primarily from sales of subscriptions to access our cloud platform, together with related support services to our customers. These arrangements do not provide the customer with the right to take possession of our software operating on our cloud platform at any time. Instead, customers are granted continuous access to our cloud platform over the contractual period. Revenue is recognized over time on a ratable basis over the contract term beginning on the date that our service is made available to the customer. Our cloud-based subscription contracts generally have annual or multi-year contractual terms which are billed in advance of the annual subscription period and are non-cancellable. • Managed services offerings consist of fees generated when we operate our software and provide our capabilities on behalf of our customers. Revenue is recognized on a ratable basis over the contract term beginning on the date that our service is made available to the customer. Our managed services offerings generally have annual or multi-year contractual terms which are billed in advance of the annual subscription period and are non-cancellable. • Revenue related to our content subscriptions associated with our software licenses is recognized ratably over the contractual period. • Some of our customers have the option to purchase additional subscription and support services at a stated price. These options generally do not provide a material right as they are priced at our SSP. Certain subscription contracts contain service level commitments, which entitle our customers to receive service credits and, in certain cases, refunds, if our services do not meet certain levels. These service credits and refunds represent variable consideration. We have historically not experienced any significant incidents affecting the defined levels of reliability and performance as required by our subscription contracts and accordingly, no estimated refunds have been considered in the allocation of the transaction price. Term and Perpetual Software Licenses For our perpetual software licenses where the utility to the customer is dependent on the continued delivery of content subscriptions, the content subscription renewal options result in a material right with respect to the perpetual software license. As a result, the revenue attributable to the perpetual software license is recognized ratably over the customer’s estimated economic life of five years, which represents a longer period of time in comparison to the initial contractual period of maintenance and support. The estimated economic life of five years represents the period which the customer is expected to benefit from the material right. We estimated this period of benefit by taking into consideration several factors, including the terms and conditions of our customer contracts and renewals and the expected useful life of our technology. For our term software licenses where the utility to the customer is dependent on the continued delivery of content subscriptions, we recognize the license revenue over the contractual term of the arrangement as a material right does not exist. For our term and perpetual software licenses which are not dependent on the continued delivery of content subscriptions, the license is considered distinct from the maintenance and support, and we therefore recognize revenue attributable to the license at the time of delivery. Maintenance and Support Maintenance and support services are sold with our perpetual and term software licenses. As maintenance and support services are distinct from the perpetual and term software license, revenue attributable to maintenance and support services is recognized ratably over the contractual period. Professional Services All of our professional services are considered distinct performance obligations when sold stand alone or with other products. These contracts generally have terms of one year or less. For the majority of these arrangements, revenue is recognized over time based upon the proportion of work performed to date. Other Other revenue primarily includes revenue from delivery of appliances and other miscellaneous revenue. Contracts with Multiple Performance Obligations The majority of our contracts with customers contain multiple performance obligations. For these contracts, we account for individual performance obligations separately if they are distinct. The transaction price is allocated to the separate performance obligations on a relative SSP basis. We determine SSP of our products and services based on our overall pricing objectives using all information reasonably available to us, taking into consideration market conditions and other factors, including the geographic locations of our customers, negotiated discounts from price lists and selling method (i.e., partner or direct). When available, we use directly observable stand-alone transactions to determine SSP. When not regularly sold on a stand-alone basis, we estimate SSP for our products and services utilizing historical sales data, including discounts from list price. The historical data is aggregated and analyzed by geographic location and selling method to establish a median or average price. Once SSP is established it is applied consistently to all transactions including that product or service utilizing a portfolio approach. Contract Balances Contract liabilities consist of deferred revenue and include payments received in advance of performance under the contract. Such amounts are recognized as revenue over the contractual period consistent with the above methodology. For the year ended December 31, 2019, we recognized revenue of $186.7 million that was included in the corresponding contract liability balance at the beginning of the period presented. Deferred revenue that will be realized during the succeeding 12-month period is recorded as current, and the remaining deferred revenue is recorded as non-current. We receive payments from customers based upon contractual billing schedules. Accounts receivable are recorded when the right to consideration becomes unconditional. Unbilled receivables include amounts related to our contractual right to consideration for both completed and partially completed performance obligations that have not been invoiced. If the right to consideration is based on satisfaction of another performance obligation in the contract other than the passage of time, we would record a contract asset. As of December 31, 2019 and 2018, unbilled receivables of $0.8 million and $0.3 million, respectively, are included in prepaid expenses and other current assets in our consolidated balance sheet. As of December 31, 2019 and 2018, we have no contract assets recorded on our consolidated balance sheet. ASC 605 Revenue Accounting Policy For periods prior to January 1, 2018, revenue was recognized in accordance with ASC 605. Under ASC 605, revenue was recognized when all of the following criteria were met: (1) Persuasive evidence of an arrangement existed, (2) delivery had occurred, (3) the sales price was fixed or determinable and (4) collectability was probable. Substantially all of our software licenses were sold in multiple-element arrangements that included maintenance and support and content subscriptions, and in addition could include cloud-based subscriptions, professional services and/or managed services. All of these elements were considered to be software elements other than cloud-based subscriptions and managed services which were non-software elements. Non-software elements included in multiple-element arrangements consist of a single deliverable that had stand-alone value and represented a single unit of accounting. We determined that we did not have vendor-specific objective evidence, or VSOE, of the selling price for the elements comprising these multiple-element arrangements as our software licenses were generally not sold on a stand-alone basis and we purposefully employed variable pricing for our offerings in order to meet customer purchase requirements along the multiple price points of the demand curve. When all of the elements of a multiple-element arrangement were software elements, the revenue for software licenses and any other products and services that were sold along with the license was generally deferred on our balance sheet and recognized as revenue on our consolidated statements of operations ratably over the contractual period of the maintenance and support, typically one to three years, which was longer than the period over which the professional services were performed. Revenue recognition began upon delivery of the software license, assuming that all other criteria for revenue recognition had been met. When a multiple-element arrangement included both software elements and non-software elements, the total arrangement consideration was first allocated between the software elements and the non-software elements based on the selling price hierarchy, which included (1) VSOE, if available, (2) third-party evidence, or TPE, if VSOE was not available or (3) best estimate of selling price, or BESP, if neither VSOE nor TPE was available. We were not able to establish a selling price for any element using VSOE or TPE. We determined BESP by considering our overall pricing objectives and market conditions. Significant pricing practices taken into consideration included our discounting practices, the size and volume of our transactions, our price lists, historical standalone sales and contract prices. The portion of the consideration allocated to the non-software elements was recognized ratably over the service period of the non-software elements, assuming all other criteria for revenue recognition had been met. The portion of the consideration allocated to software elements was recognized as described above. With respect to our managed services and cloud-based subscription offerings sold on a stand-alone basis, we recognized revenue ratably over the term of the managed service agreement or subscription, assuming that the other criteria for revenue recognition were met. We recognized revenue from professional services sold on a stand-alone basis as those services were rendered. We adopted ASC 606 on January 1, 2018 using the modified retrospective method. The adoption of ASC 606 resulted in a cumulative adjustment to increase our accumulated deficit as of January 1, 2018. Comparative prior periods were not adjusted. In accordance with ASC 606, we capitalize commission expenses paid to internal sales personnel and partner referral fees that are incremental costs to obtaining customer contracts. These costs are recorded as deferred contract acquisition costs on the consolidated balance sheets. Costs to obtain a contract for a new customer, up-sell or cross-sell are amortized on a straight-line basis over an estimated period of benefit of five years as sales commissions on initial sales are not commensurate with sales commissions on contract renewals. We determined the estimated period of benefit by taking into consideration the contractual term and expected renewals of customer contracts, our technology and other factors, including the fact that commissions paid on renewals are not commensurate with commissions paid on initial sales transactions. We periodically review the carrying amount of deferred contract acquisition costs to determine whether events or changes in circumstances have occurred that could impact the period of benefit. Commissions paid relating to contract renewals are deferred and amortized on a straight-line basis over the related renewal period. Costs to obtain a contract for professional services arrangements are expensed as incurred in accordance with the practical expedient as the contractual period of our professional services arrangements are one year or less. Amortization expense associated with deferred contract acquisition costs is recorded to sales and marketing expense in our consolidated statements of operations. We capitalize costs incurred to fulfill our contracts that relate directly to the contract, are expected to generate resources that will be used to satisfy our performance obligations and are expected to be recovered through revenue generated under the contract. Contract fulfillment costs are amortized on a straight-line basis over the estimated period of benefit and recorded as cost of products in our consolidated statement of operations. |
| Cash and Cash Equivalents | Cash and Cash EquivalentsWe consider all highly liquid instruments with original maturities of three months or less at the date of purchase to be cash equivalents. Cash and cash equivalents are recorded at cost, which approximates fair value. |
| Investments | InvestmentsWe classify our investments as available-for-sale and record these investments at fair value. We currently invest primarily in commercial paper, corporate bonds, agency bonds, U.S. Government agencies and asset-backed securities. Investments with an original maturity of greater than three months at the date of purchase and less than one year from the date of the balance sheet are classified as short-term and those with maturities of more than one year from the date of the balance sheet are classified as long-term in the consolidated balance sheet. Additionally, we do not invest in any securities with contractual maturities greater than 24 months. Unrealized gains and losses that are considered temporary are reported as a component of other comprehensive loss. Realized gains and losses are determined based on the specific identification method, and are reflected in our consolidated statements of operations. We regularly review our investment portfolio to identify and evaluate investments that have indicators of possible impairment. Factors considered in determining whether a loss is other-than-temporary include, but are not limited to: the length of time and extent a security’s fair value has been below its cost, the financial condition and near-term prospects of the investee, the credit quality of the security’s issuer, likelihood of recovery and our intent and ability to hold the security for a period of time sufficient to allow for any anticipated recovery in value. For our debt instruments, we also evaluate whether we have the intent to sell the security or it is more likely than not that we will be required to sell the security before recovery of its cost basis. |
| Accounts Receivable and Allowance for Doubtful Accounts | Accounts Receivable and Allowance for Doubtful AccountsAccounts receivable are recorded at the invoiced amount, net of allowances for doubtful accounts. Management regularly reviews the adequacy of the allowance for doubtful accounts by considering specific customer collection issues and historical write-off trends to determine whether an allowance is appropriate. Accounts receivable are charged against the allowance for doubtful accounts after all means of collection have been exhausted and the potential for recovery is considered remote. Additions to the allowance for doubtful accounts are recorded in general and administrative expense in the consolidated statement of operations. We do not have any off-balance sheet credit exposure related to our customers. |
| Concentration of Credit Risk | Concentration of Credit Risk Financial instruments that potentially expose us to concentrations of credit risk consist primarily of cash and cash equivalents, accounts receivable and short-term and long-term investments. Deposits held with banks may exceed the amount of insurance provided on such deposits. We have not experienced any losses in such accounts and believe that we are not exposed to any significant risk. We provide credit to customers in the normal course of business. Collateral is not required for accounts receivable, but ongoing credit evaluations of customers’ financial condition are performed. We maintain reserves for potential credit losses. No single customer, including channel partners, accounted for 10% or more of our total revenues in 2019, 2018 or 2017 or accounts receivable as of December 31, 2019 or 2018. Our short-term and long-term investments primarily consist of commercial paper, corporate bonds, agency bonds, U.S. Government agencies and asset-backed securities. All of our investments are highly-rated by credit rating agencies and are issued by organizations with reputable credit, and therefore bear minimal credit risk. |
| Deferred Contract Acquisition and Fulfillment Costs | Revenue Recognition We generate products revenue from the sale of (1) cloud-based subscriptions for our InsightIDR, InsightVM, InsightAppSec and InsightConnect products, (2) managed services offerings which utilize our products and (3) term or perpetual software licenses for our Nexpose, Metasploit and AppSpider products, and associated content subscriptions for our Nexpose and Metasploit products. We also generate appliance revenue that is included in our products revenue and is associated with hardware sold with our Nexpose product to certain customers. We generate maintenance and support revenue associated with customers’ purchases of our software licenses for Nexpose, Metasploit and AppSpider. We generate professional service revenue from the sale of our deployment and training services related to our solutions, incident response services, penetration testing and security advisory services. Our deployment services educate and assist our customers on the best use and best practices to deploy our solutions. We adopted Financial Accounting Standards Board (FASB) Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers (Topic 606) (ASC 606) on January 1, 2018 using the modified retrospective method. The adoption of ASC 606 resulted in a cumulative adjustment to increase our accumulated deficit by $25.9 million at January 1, 2018, which included a $0.9 million increase in deferred revenue and $0.4 million increase in deferred tax liabilities, offset by a $27.1 million increase in deferred contract asset and fulfillment costs. As a result of the adoption of ASC 606, the net loss on our consolidated statement of operations for the year ended December 31, 2018 was decreased by $0.6 million. The change in the net loss was primarily due to a $12.9 million decrease in sales and marketing expense, due to the capitalization of commissions, partially offset by a $11.8 million decrease in revenue, primarily due to a decrease in perpetual license revenue and a $0.3 million increase in provision to income taxes due additional deferred taxes for the temporary differences between the accounting and tax treatment of capitalized costs to obtain and fulfill a contract. The adoption of ASC 606 resulted in offsetting changes in operating assets and liabilities and had no impact on net cash flow from operations. We recognize revenue when a customer obtains control of promised products or services. The amount of revenue recognized reflects the consideration that we expect to be entitled to receive in exchange for these products or services. To achieve the core principle of this standard, we apply the following five steps: 1) Identify the contract with a customer We consider the terms and conditions of the contracts and our customary business practices in identifying our contracts. We determine we have a contract with a customer when the contract is approved, we can identify each party’s rights regarding the services to be transferred, we can identify the payment terms for the services, and we have determined the customer has the ability and intent to pay and the contract has commercial substance. We apply judgment in determining the customer’s ability and intent to pay, which is based on a variety of factors, including the customer’s historical payment experience or, in the case of a new customer, credit and financial information pertaining to the customer. 2) Identify the performance obligations in the contract Performance obligations promised in a contract are identified based on the products and services that will be transferred to the customer that are both capable of being distinct, whereby the customer can benefit from the product or service either on its own or together with other resources that are readily available from third parties or from us, and are distinct in the context of the contract, whereby the transfer of the products or services is separately identifiable from other promises in the contract. 3) Determine the transaction price The transaction price is determined based on the consideration to which we expect to be entitled in exchange for transferring products or services to the customer. Variable consideration is included in the transaction price if, in our judgment, it is probable that no significant future reversal of cumulative revenue under the contract will occur. In instances where the timing of revenue recognition differs from the timing of invoicing, we have determined our contracts generally do not include a significant financing component. The primary purpose of our invoicing terms is to provide customers with simplified and predictable ways of purchasing our products and services, not to receive financing from our customers or to provide customers with financing. Examples include invoicing at the beginning of a subscription term with revenue recognized ratably over the contract period. Sales through our channel network of distributors and resellers are generally discounted as compared to the price that we would sell to an end user. Revenue for sales through our channel network is recorded net of any distributor or reseller margin. 4) Allocate the transaction price to performance obligations in the contract If the contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Contracts that contain multiple performance obligations require an allocation of the transaction price to each performance obligation based on a relative standalone selling price (“SSP”). 5) Recognize revenue when or as we satisfy a performance obligation Revenue is recognized at the time the related performance obligation is satisfied by transferring the promised product or service to a customer. Revenue is recognized when control of the products or services are transferred to our customers, in an amount that reflects the consideration that we expect to receive in exchange for those products or services. Subscription Revenue Subscription revenue consists of revenue from our cloud-based subscription, managed services offerings and content subscriptions associated with our software licenses. • We generate cloud-based subscription revenue primarily from sales of subscriptions to access our cloud platform, together with related support services to our customers. These arrangements do not provide the customer with the right to take possession of our software operating on our cloud platform at any time. Instead, customers are granted continuous access to our cloud platform over the contractual period. Revenue is recognized over time on a ratable basis over the contract term beginning on the date that our service is made available to the customer. Our cloud-based subscription contracts generally have annual or multi-year contractual terms which are billed in advance of the annual subscription period and are non-cancellable. • Managed services offerings consist of fees generated when we operate our software and provide our capabilities on behalf of our customers. Revenue is recognized on a ratable basis over the contract term beginning on the date that our service is made available to the customer. Our managed services offerings generally have annual or multi-year contractual terms which are billed in advance of the annual subscription period and are non-cancellable. • Revenue related to our content subscriptions associated with our software licenses is recognized ratably over the contractual period. • Some of our customers have the option to purchase additional subscription and support services at a stated price. These options generally do not provide a material right as they are priced at our SSP. Certain subscription contracts contain service level commitments, which entitle our customers to receive service credits and, in certain cases, refunds, if our services do not meet certain levels. These service credits and refunds represent variable consideration. We have historically not experienced any significant incidents affecting the defined levels of reliability and performance as required by our subscription contracts and accordingly, no estimated refunds have been considered in the allocation of the transaction price. Term and Perpetual Software Licenses For our perpetual software licenses where the utility to the customer is dependent on the continued delivery of content subscriptions, the content subscription renewal options result in a material right with respect to the perpetual software license. As a result, the revenue attributable to the perpetual software license is recognized ratably over the customer’s estimated economic life of five years, which represents a longer period of time in comparison to the initial contractual period of maintenance and support. The estimated economic life of five years represents the period which the customer is expected to benefit from the material right. We estimated this period of benefit by taking into consideration several factors, including the terms and conditions of our customer contracts and renewals and the expected useful life of our technology. For our term software licenses where the utility to the customer is dependent on the continued delivery of content subscriptions, we recognize the license revenue over the contractual term of the arrangement as a material right does not exist. For our term and perpetual software licenses which are not dependent on the continued delivery of content subscriptions, the license is considered distinct from the maintenance and support, and we therefore recognize revenue attributable to the license at the time of delivery. Maintenance and Support Maintenance and support services are sold with our perpetual and term software licenses. As maintenance and support services are distinct from the perpetual and term software license, revenue attributable to maintenance and support services is recognized ratably over the contractual period. Professional Services All of our professional services are considered distinct performance obligations when sold stand alone or with other products. These contracts generally have terms of one year or less. For the majority of these arrangements, revenue is recognized over time based upon the proportion of work performed to date. Other Other revenue primarily includes revenue from delivery of appliances and other miscellaneous revenue. Contracts with Multiple Performance Obligations The majority of our contracts with customers contain multiple performance obligations. For these contracts, we account for individual performance obligations separately if they are distinct. The transaction price is allocated to the separate performance obligations on a relative SSP basis. We determine SSP of our products and services based on our overall pricing objectives using all information reasonably available to us, taking into consideration market conditions and other factors, including the geographic locations of our customers, negotiated discounts from price lists and selling method (i.e., partner or direct). When available, we use directly observable stand-alone transactions to determine SSP. When not regularly sold on a stand-alone basis, we estimate SSP for our products and services utilizing historical sales data, including discounts from list price. The historical data is aggregated and analyzed by geographic location and selling method to establish a median or average price. Once SSP is established it is applied consistently to all transactions including that product or service utilizing a portfolio approach. Contract Balances Contract liabilities consist of deferred revenue and include payments received in advance of performance under the contract. Such amounts are recognized as revenue over the contractual period consistent with the above methodology. For the year ended December 31, 2019, we recognized revenue of $186.7 million that was included in the corresponding contract liability balance at the beginning of the period presented. Deferred revenue that will be realized during the succeeding 12-month period is recorded as current, and the remaining deferred revenue is recorded as non-current. We receive payments from customers based upon contractual billing schedules. Accounts receivable are recorded when the right to consideration becomes unconditional. Unbilled receivables include amounts related to our contractual right to consideration for both completed and partially completed performance obligations that have not been invoiced. If the right to consideration is based on satisfaction of another performance obligation in the contract other than the passage of time, we would record a contract asset. As of December 31, 2019 and 2018, unbilled receivables of $0.8 million and $0.3 million, respectively, are included in prepaid expenses and other current assets in our consolidated balance sheet. As of December 31, 2019 and 2018, we have no contract assets recorded on our consolidated balance sheet. ASC 605 Revenue Accounting Policy For periods prior to January 1, 2018, revenue was recognized in accordance with ASC 605. Under ASC 605, revenue was recognized when all of the following criteria were met: (1) Persuasive evidence of an arrangement existed, (2) delivery had occurred, (3) the sales price was fixed or determinable and (4) collectability was probable. Substantially all of our software licenses were sold in multiple-element arrangements that included maintenance and support and content subscriptions, and in addition could include cloud-based subscriptions, professional services and/or managed services. All of these elements were considered to be software elements other than cloud-based subscriptions and managed services which were non-software elements. Non-software elements included in multiple-element arrangements consist of a single deliverable that had stand-alone value and represented a single unit of accounting. We determined that we did not have vendor-specific objective evidence, or VSOE, of the selling price for the elements comprising these multiple-element arrangements as our software licenses were generally not sold on a stand-alone basis and we purposefully employed variable pricing for our offerings in order to meet customer purchase requirements along the multiple price points of the demand curve. When all of the elements of a multiple-element arrangement were software elements, the revenue for software licenses and any other products and services that were sold along with the license was generally deferred on our balance sheet and recognized as revenue on our consolidated statements of operations ratably over the contractual period of the maintenance and support, typically one to three years, which was longer than the period over which the professional services were performed. Revenue recognition began upon delivery of the software license, assuming that all other criteria for revenue recognition had been met. When a multiple-element arrangement included both software elements and non-software elements, the total arrangement consideration was first allocated between the software elements and the non-software elements based on the selling price hierarchy, which included (1) VSOE, if available, (2) third-party evidence, or TPE, if VSOE was not available or (3) best estimate of selling price, or BESP, if neither VSOE nor TPE was available. We were not able to establish a selling price for any element using VSOE or TPE. We determined BESP by considering our overall pricing objectives and market conditions. Significant pricing practices taken into consideration included our discounting practices, the size and volume of our transactions, our price lists, historical standalone sales and contract prices. The portion of the consideration allocated to the non-software elements was recognized ratably over the service period of the non-software elements, assuming all other criteria for revenue recognition had been met. The portion of the consideration allocated to software elements was recognized as described above. With respect to our managed services and cloud-based subscription offerings sold on a stand-alone basis, we recognized revenue ratably over the term of the managed service agreement or subscription, assuming that the other criteria for revenue recognition were met. We recognized revenue from professional services sold on a stand-alone basis as those services were rendered. We adopted ASC 606 on January 1, 2018 using the modified retrospective method. The adoption of ASC 606 resulted in a cumulative adjustment to increase our accumulated deficit as of January 1, 2018. Comparative prior periods were not adjusted. In accordance with ASC 606, we capitalize commission expenses paid to internal sales personnel and partner referral fees that are incremental costs to obtaining customer contracts. These costs are recorded as deferred contract acquisition costs on the consolidated balance sheets. Costs to obtain a contract for a new customer, up-sell or cross-sell are amortized on a straight-line basis over an estimated period of benefit of five years as sales commissions on initial sales are not commensurate with sales commissions on contract renewals. We determined the estimated period of benefit by taking into consideration the contractual term and expected renewals of customer contracts, our technology and other factors, including the fact that commissions paid on renewals are not commensurate with commissions paid on initial sales transactions. We periodically review the carrying amount of deferred contract acquisition costs to determine whether events or changes in circumstances have occurred that could impact the period of benefit. Commissions paid relating to contract renewals are deferred and amortized on a straight-line basis over the related renewal period. Costs to obtain a contract for professional services arrangements are expensed as incurred in accordance with the practical expedient as the contractual period of our professional services arrangements are one year or less. Amortization expense associated with deferred contract acquisition costs is recorded to sales and marketing expense in our consolidated statements of operations. We capitalize costs incurred to fulfill our contracts that relate directly to the contract, are expected to generate resources that will be used to satisfy our performance obligations and are expected to be recovered through revenue generated under the contract. Contract fulfillment costs are amortized on a straight-line basis over the estimated period of benefit and recorded as cost of products in our consolidated statement of operations. |
| Property and Equipment | Property and EquipmentProperty and equipment are recorded at cost and depreciated over their estimated useful lives using the straight-line method. |
| Software Development Costs | Software Development Costs Software development costs associated with the development of products for sale are recorded to research and development expense until technological feasibility has been established for the product. Once technological feasibility is established, all software costs are capitalized until the product is available for release to customers. To date, the software development costs have not been capitalized as we believe our current software development process is essentially completed concurrently with the establishment of technological feasibility. As such, these costs are expensed as incurred and recognized in research and development expenses in our consolidated statements of operations.With respect to software developed for internal use, we capitalize qualifying internal costs, such as payroll and benefits of those employees directly associated with the development of the software, and other qualifying consulting costs. Costs incurred during the preliminary planning and evaluation and post implementation stages of the project are expensed as incurred. Costs incurred during the application development stage of the project are capitalized. We capitalized $6.1 million, $3.3 million and $1.2 million of costs related to software developed for internal use in the years ended December 31, 2019, 2018 and 2017, respectively. |
| Leases | Leases Effective January 1, 2019, we adopted FASB ASU 2016-02, Leases (Topic 842), as amended (ASC 842). In accordance with ASC 842, at the inception of an arrangement, we determine whether the arrangement is or contains a lease based on the unique facts and circumstances present and the classification of the lease. Most leases with a term greater than one year are recognized on the consolidated balance sheet as right-of-use (ROU) assets, lease liabilities and, if applicable, long-term lease liabilities. We have elected not to recognize on the balance sheet leases with terms of one year or less. For contracts with lease and non-lease components, we have elected not to allocate the contract consideration and to account for the lease and non-lease components as a single lease component. Lease liabilities and their corresponding ROU assets are recorded based on the present value of lease payments over the expected lease term. The implicit rate within our operating leases are generally not determinable and therefore we use the incremental borrowing rate at the lease commencement date to determine the present value of lease payments. The determination of our incremental borrowing rate requires judgment. We determine our incremental borrowing rate for each lease using our estimated borrowing rate, adjusted for various factors including level of collateralization, term and currency to align with the terms of the lease. The operating lease ROU asset also includes any lease prepayments, offset by lease incentives. Certain of our leases include options to extend or terminate the lease. An option to extend the lease is considered in connection with determining the ROU asset and lease liability when it is reasonably certain we will exercise that option. An option to terminate is considered unless it is reasonably certain we will not exercise the option. For periods prior to the adoption of ASC 842, we recorded rent expense on a straight-line basis over the term of the related lease. The difference between the straight-line rent expense and the payments made in accordance with the operating lease agreements were recognized as a deferred rent liability on the accompanying consolidated balance sheets. |
| Long-Lived Assets | Long-Lived AssetsWe evaluate our long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying value of these assets may not be recoverable. When such events or changes in circumstances occur, recoverability of these assets is measured by a comparison of the carrying value of the assets to the future net undiscounted cash flows directly associated with the assets. If such assets are considered to be impaired, the impairment recognized is the amount by which the carrying value exceeds the fair value of the assets. For the year ended December 31, 2019, we determined there were no indicators of impairment of our long-lived assets. |
| Business Combinations | Business CombinationsWe account for business combinations by recognizing the fair value of acquired assets and liabilities. The excess of the purchase price for acquisitions over the fair value of the net assets acquired, including other intangible assets, is recorded as goodwill. Acquisition-related transaction costs are expensed as incurred. Determining the fair value of assets and liabilities assumed requires management to make significant estimates and assumptions, especially with respect to intangible assets. While we use our best estimates and assumptions as part of the purchase price allocation to accurately value assets acquired and liabilities assumed at the acquisition date, our estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, we record adjustments to the assets acquired and liabilities assumed with the corresponding offset to goodwill to the extent that we identify adjustments to the preliminary purchase price allocation. Upon the conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to the consolidated statements of operations. Acquisition-related transaction costs are expensed as incurred. |
| Goodwill | Goodwill Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Goodwill is not amortized but is tested for impairment at least annually or more frequently when events or circumstances occur that indicate that it is more likely than not that an impairment has occurred. We test goodwill for impairment on the last day of each fiscal year and whenever events or changes in circumstances indicate that the carrying amount of this asset may exceed its fair value. For our goodwill impairment analysis, we operate with a single reporting unit. To test goodwill impairment, we perform a single-step goodwill impairment test to identify potential goodwill impairment. The single-step impairment test begins with an estimation of the fair value of a reporting unit. Goodwill impairment exists when a reporting unit’s carrying value exceeds its fair value. In performing the single step of the goodwill impairment testing and measurement process, we estimated the fair value of our single reporting unit using our market capitalization. Based upon our assessment performed as of December 31, 2019, we concluded the fair value of our single reporting unit exceeded its' carrying value and there was no impairment of goodwill. |
| Foreign Currency | Foreign CurrencyThe functional currency of our foreign subsidiaries is the U.S. dollar. We translate all monetary assets and liabilities denominated in foreign currencies into U.S. dollars using the exchange rates in effect at the balance sheet dates and non-monetary assets and liabilities using historical exchange rates. Foreign currency denominated expenses are re-measured using the average exchange rates for the period. Foreign currency transaction and re-measurement gains and losses are included in other income (expense), net. In 2019, we recorded foreign currency transactional losses of $(0.2) million. In 2018 and 2017, we recorded nominal foreign currency transactional gains (losses). In 2019, 2018 and 2017, we recorded foreign currency re-measurement gains (losses) of $(0.3) million, $(0.8) million and $0.4 million, respectively. |
| Stock-Based Compensation | Stock-Based CompensationStock-based compensation expense related to our stock options, restricted stock awards (RSAs), restricted stock units (RSUs) and purchase rights issued under our 2015 Employee Stock Purchase Plan (ESPP) is calculated based on the estimated fair value of the award on the grant date. The fair value is recognized as expense on a straight-line basis over the requisite service period, which is generally the vesting period of the respective award. We recognize forfeitures as they occur and do not estimate a forfeiture rate when calculating the stock-based compensation expense. The fair values of RSAs and RSUs are based on the closing market price of our common stock on the Nasdaq Global Market on the date of grant. The fair values of stock options and ESPP purchase rights are estimated on the grant date using the Black-Scholes option pricing model which requires management to make a number of assumptions, including the expected life of the option, the volatility of the underlying stock, the risk-free interest rate and expected dividends. The assumptions used in our Black-Scholes option-pricing model represent management’s best estimates at the time of grant. These estimates involve a number of variables, uncertainties and assumptions and the application of management’s judgment, as they are inherently subjective. If any assumptions change, our stock-based compensation expense could be materially different in the future. |
| Advertising | AdvertisingAdvertising costs are expensed as incurred, and are recorded in sales and marketing expense in our consolidated statement of operations. We incurred $12.8 million, $8.9 million and $8.4 million in advertising expense in 2019, 2018 and 2017, respectively. |
| Income Taxes | Income Taxes Income taxes are accounted for using the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for differences between the financial statement carrying amounts of existing assets and liabilities and their respective income tax bases, and operating loss and tax credit carryforwards using tax rates expected to be in effect in the years in which the differences are expected to reverse. Deferred tax assets are reduced by a valuation allowance if it is more likely than not that some or all of the deferred tax assets will not be realized in the future. We recognize tax benefits from uncertain tax positions if it is more likely than not that the tax position will be sustained on examination by the taxing authorities based on the technical merits of the position. Interest and penalties associated with such uncertain tax positions are classified as a component of income tax expense. |
| Net Loss per Share | Net Loss per Share We calculate basic net loss per share by dividing our net loss by the weighted-average number of common shares outstanding during the period. Diluted net loss per share is computed by giving effect to all potentially dilutive securities, including stock options, RSAs, RSUs, the impact of our ESPP and the impact of the conversion spread of our consolidated senior notes (Notes). Basic and diluted net loss per share was the same for all periods presented as the inclusion of all potentially dilutive securities outstanding was anti-dilutive. |
| Recent Accounting Pronouncements | Recent Accounting Pronouncements Accounting Pronouncements Recently Adopted In February 2016, the FASB issued ASU 2016-02, Leases , (Topic 842), as amended (ASC 842), which required companies to recognize on the balance sheet the assets and liabilities for the rights and obligations created by the leased asset. We adopted this standard effective January 1, 2019 using the modified retrospective approach for all leases entered into before the effective date. We also elected to implement the new standard at the adoption date with a cumulative-effect adjustment, if any, recognized to the opening balance of accumulative deficit in the period of adoption. For comparability purposes, we will continue to comply with the previous disclosure requirements in accordance with the existing lease guidance for all periods presented in the year of adoption. We elected the package of practical expedients as permitted under the transition guidance, which allowed us: (1) to carry forward the historical lease classification; (2) not to reassess whether expired or existing contracts are or contain leases; and (3) not reassess the treatment of initial direct costs of existing leases. In addition, we elected an accounting policy to not recognize leases with an initial term of one year or less on the balance sheet. Upon the adoption of this standard on January 1, 2019, we recognized a total lease liability of $21.3 million, representing the present value of the minimum rental payments as of the adoption date and a right-of-use asset in the amount of $15.4 million. We did not have any finance leases (formerly referred to as capital leases prior to the adoption of ASC 842), therefore there was no change in accounting treatment required. Accounting Pronouncements Not Yet Effective In August 2018, the FASB issued ASU 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract, which aligns the requirements for capitalizing implementation costs in cloud computing arrangements with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The new standard will be effective for us in the first quarter of 2020. Entities can choose to adopt the new guidance prospectively or retrospectively. We plan to adopt this standard using the prospective adoption approach, however we are currently in the process of evaluating the effects of this pronouncement on our consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement, which eliminates, modifies and adds disclosure requirements for fair value measurements. The new standard will be effective for us in the first quarter of 2020. We do not expect this ASU to have an impact on our consolidated financial statements. |
