| Summary of Significant Accounting Policies (Policies) | 12 Months Ended |
| Dec. 31, 2014 |
| Basis of Presentation | Basis of Presentation |
| The accompanying consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP). |
| Basis of Consolidation | Basis of Consolidation |
| The consolidated financial statements include our accounts and those of our wholly and indirectly owned subsidiaries. We eliminate all intercompany balances and transactions, including intercompany profits, in consolidation. |
| Use of Estimates | Use of Estimates |
| The preparation of financial statements in conformity with U.S. GAAP requires us to make certain estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. We base our estimates on historical experience, current business factors, and various other assumptions that we believe are necessary to consider to form a basis for making judgments about the carrying values of assets and liabilities, the recorded amounts of revenue and expenses, and the disclosure of contingent assets and liabilities. |
| We are subject to uncertainties such as the impact of future events; economic, environmental, and political factors; and changes in our business environment; therefore, actual results could differ from these estimates. Accordingly, the accounting estimates used in the preparation of our consolidated financial statements will change as new events occur, as more experience is acquired, as additional information is obtained, and as our operating environment changes. We make changes in estimates when circumstances warrant. We reflect such changes in estimates and refinements in estimation methodologies in reported results of operations. If material, we disclose the effects of changes in estimates in the notes to the consolidated financial statements. Significant estimates and assumptions affect the following: the allocation of the purchase price associated with acquisitions; the carrying value of long-lived assets; the amortization period of long-lived assets; the carrying value, capitalization, and amortization of software and website development costs; the carrying value of goodwill and other intangible assets; the amortization period of intangible assets; the provision for income taxes and related deferred tax accounts, and realizablity of deferred tax assets; certain accrued expenses; contingencies, litigation, and related legal accruals; and the value attributed to employee stock options and other stock-based awards. |
| Operating Segments | Operating Segments |
| We have two operating segments, which are also our reporting units: consumer and enterprise. These operating segments are components for which separate financial information is available and for which operating results are evaluated on a regular basis by the chief operating decision maker in deciding how to allocate resources and in assessing the performance of the segments. |
| In our consumer segment, we offer proactive identity theft protection services to our members on an annual or monthly subscription basis. In our enterprise segment, we offer consumer risk management services to our enterprise customers. |
| Business Combinations | Business Combinations |
| We account for business acquisitions using the acquisition method of accounting and record identifiable intangible assets separate from goodwill. We record intangible assets at their fair value based on estimates as of the date of acquisition. |
| We charge acquisition related costs that are not part of the consideration to general and administrative expense as they are incurred. These costs typically include transaction and integration costs, such as legal, accounting, and other professional fees. |
| Goodwill and Other Intangible Assets | Goodwill and Other Intangible Assets |
| Goodwill represents the excess of the purchase price of acquired businesses over the fair value assigned to the individual assets acquired and liabilities assumed. We do not amortize goodwill, but instead test goodwill for impairment annually in the fourth quarter of our fiscal year and whenever events and changes in circumstances indicate that it is more-likely-than-not that the fair value of a reporting unit that has goodwill is less than its carrying value. |
| In assessing goodwill for impairment, we have elected to first make a qualitative assessment of whether it is more-likely-than-not that a reporting unit’s fair value is less than its carrying value to determine whether it is necessary to perform the two-step goodwill impairment test. The qualitative impairment test includes considering various factors, including macroeconomic conditions, industry and market conditions, cost factors, a sustained share price or market capitalization decrease, and any reporting unit specific events. If it is determined through the qualitative assessment that a reporting unit’s fair value is more-likely-than-not greater than its carrying value, the two-step impairment test is not required. If the qualitative assessment indicates it is more-likely-than-not that a reporting unit’s fair value is not greater than its carrying value, we must perform the two-step impairment test. No impairment of goodwill was identified as of December 31, 2014. |
| In connection with our acquisitions of ID Analytics and Lemon, we recorded certain finite-lived intangible assets for customer, technology, and trade names and trademarks related intangible assets. We amortize the acquisition date fair value of these assets on a straight-line basis over the estimated useful lives of the assets. We review our acquired-intangible assets annually in the fourth quarter of our fiscal year and whenever events and changes in circumstances indicate the carrying amount of the acquired-intangible assets may not be recoverable. If such events or changes in circumstances occur, we compare the carrying amount of the acquired-intangible asset to the undiscounted expected future cash flows related to such asset. If an impairment is indicated, the amount of the impairment is calculated as the difference between the carrying amount and the fair value of the asset, which is estimated using the discounted expected cash flows attributable to the asset. The estimates required in determining if an impairment exists include forecasted usage of the acquired intangible asset, the useful lives of such assets, and expected future cash flows. No impairment of acquired intangible assets was identified as of December 31, 2014. |
| Per Share Data | Per Share Data |
| We compute basic earnings per share by dividing net income available to common stockholders by the weighted-average number of common shares outstanding for the period. We determine net income available to common stockholders by deducting the accretion on convertible redeemable preferred stock and the net income allocable to convertible redeemable preferred stock, determined under the two class method, from net income. We compute diluted earnings per share giving effect to all potentially dilutive common stock equivalents, including share-based compensation, convertible redeemable preferred stock, warrants to acquire common stock, and warrants to acquire convertible redeemable preferred stock. We make adjustments to the diluted net income available to common stockholders to reflect the reversal of gains on the change in the value of warrant liabilities and additional accretion on convertible redeemable preferred stock, assuming conversion of warrants to acquire convertible redeemable preferred stock at the beginning of the period. We offset these adjustments by reductions in the net income allocable to convertible redeemable preferred stockholders for those securities that were assumed to convert prior to the conversion in connection with our IPO. Those securities determined to be anti-dilutive as common stock equivalents are excluded from the calculation of diluted earnings per share; however, such securities continue to be included in the application of the two-class method to the extent applicable. |
| Concentrations of Credit Risk | Concentrations of Credit Risk |
| In the normal course of business, we are exposed to credit risk. We believe our concentration of credit risk with respect to trade receivables is limited because of the large number of customers and customer dispersion across many different geographic and economic environments. We maintain an allowance for doubtful trade accounts receivable based upon factors surrounding the credit risk of specific clients, historical trends, and other information. |
| Cash and Cash Equivalents | Cash and Cash Equivalents |
| Cash includes cash on hand and cash held with banks. Cash equivalents are short-term, highly liquid investments with original maturities of three months or less when acquired. Cash and cash equivalents are deposited in or managed by major financial institutions and at times exceed Federal Deposit Insurance Corporation insurance limits. |
| Cash and cash equivalents also include credit card and debit card receivables. The majority of payments due from financial intermediaries for credit card and debit card transactions process within 72 hours, except for transactions occurring on a Friday, which are generally processed the following Monday. Amounts due from financial intermediaries for these transactions classified as cash and cash equivalents totaled $805 and $1,623 as of December 31, 2014 and 2013, respectively. |
| Marketable Securities | Marketable Securities |
| We hold investments in marketable securities consisting of corporate debt securities, municipal debt securities, commercial paper, and certificates of deposit. We determine the appropriate classification of marketable securities at the time of purchase and reevaluate such determination at each balance sheet date. As of December 31, 2014, we classified all marketable securities as current as such investments are available to fund current operations. Based on our intentions regarding our marketable securities, all marketable securities are classified as available-for-sale and are carried at fair value with unrealized gains and losses recorded as a separate component of other comprehensive income, net of income taxes on the consolidated statements of comprehensive income. Realized gains and losses and declines in fair value determined to be other-than-temporary are determined using the specific-identification method and are reflected as a component of other income (expense) in the consolidated statements of operations. We periodically review our marketable securities for other-than temporary declines in fair value and write down such marketable securities when an other-than-temporary decline has occurred. No such impairments of marketable securities have been recorded to date. |
| Allowance for Doubtful Accounts | Allowance for Doubtful Accounts |
| We maintain an allowance for doubtful accounts to provide for uncollectible trade receivables. We base the allowance on historical collections, write-off experience, current economic trends, and changes in customer payment terms and other factors that may affect our ability to collect payments. As of December 31, 2014 and 2013, our allowance for doubtful accounts was $61 and $104, respectively. |
| Property and Equipment | Property and Equipment |
| We state property and equipment at cost, less accumulated depreciation, amortization, and any impairment in value. We assess long-lived assets, including our property and equipment, for impairment whenever events or changes in business circumstances arise that may indicate that the carrying amount of the long-lived assets may not be recoverable. |
| We compute depreciation and amortization using the straight-line method over the following estimated useful lives of the assets: |
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| Leasehold improvements | The shorter of the estimated useful life or the life of the lease |
| Telecommunications, network and computing equipment | 3–5 years |
| Computer software | 3 years |
| Furniture, fixtures and office equipment | 3–7 years |
| Debt Issuance Costs | Debt Issuance Costs |
| We defer and amortize issuance costs, underwriting fees, and related expenses incurred in connection with the issuance of debt instruments using the effective interest rate method over the terms of the instruments. We charge unamortized debt issuance costs to interest expense when the related debt is extinguished. |
| Cost of Services | Cost of Services |
| Cost of services consists primarily of the direct and contract labor costs, fulfillment costs, and remediation costs to fulfill our service agreements. Cost of services also includes rent expense, facilities support, quality assurance expenses, and depreciation and amortization of long-lived assets related to the operations of our service fulfillment centers. We also include sales incentives provided to our members in cost of services. |
| Technology and Development | Technology and Development |
| Technology and development expenses consist primarily of personnel costs incurred in product development, maintenance and testing of our websites, developing solutions for new services, internal information systems and infrastructure, third-party development, and other internal-use software systems. Our development costs are primarily incurred in the United States and primarily devoted to enhancing our consumer and enterprise service offerings. |
| Share-Based Compensation | Share-Based Compensation |
| We measure share-based compensation cost at fair value using the Black-Scholes option pricing model with compensation cost amortized on a straight-line basis over each award’s full vesting period, except for awards with performance conditions, which we recognize using the accelerated method. Because of the lack of sufficient historical data to calculate the expected term of equity awards, we use the average of the vesting term and the contractual term to estimate the expected term for service-based options granted to employees. We estimate volatility by utilizing our historical share price and the historical volatility of comparable companies with publicly available share prices. Share-based compensation expense is recorded net of estimated forfeitures whereby expense is recorded only for those stock-based awards we expect to vest. We estimate the forfeiture rates based on historical forfeiture rates and will revise our estimated forfeiture rate if actual forfeitures differ from the estimated forfeiture rate. We include share-based compensation expense in cost of services, sales and marketing expenses, technology and development expenses, and general and administrative expenses consistent with the respective employees’ department in the consolidated statement of operations. The fair value of restricted stock units and restricted stock awards is based on the value of our stock on the grant date. Compensation cost for restricted stock units and restricted stock awards is amortized on a straight-line basis over each award’s full vesting period. |
| Advertising Costs | Advertising Costs |
| We expense advertising costs as incurred, except for direct-response advertising costs, which are expensed in the period in which it will benefit. Direct-response advertising costs include telemarketing, web-based marketing, and direct mail costs related directly to membership solicitation. Advertising expense totaled approximately $121,092, $86,165, and $66,049 for the years ended December 31, 2014, 2013, and 2012, respectively. |
| Warrants for Shares of Convertible Redeemable Preferred Stock | Warrants for Shares of Convertible Redeemable Preferred Stock |
| Prior to our IPO, certain warrants could be exercised to purchase shares of our convertible redeemable preferred stock. We accounted for these warrants as liabilities and recognized them at their fair value. We adjusted the carrying value of such warrants to fair value at each balance sheet date, with the change in the fair value being recorded as a component of other income (expense). In connection with our IPO, such warrants were converted into warrants to purchase shares of common stock. |
| Income Taxes | Income Taxes |
| We account for income taxes using the asset and liability method. We recognize deferred tax assets and liabilities for the future tax benefits and consequences attributable to temporary differences between the financial reporting basis of assets and liabilities and their related tax basis. We measure deferred tax assets and liabilities using the enacted tax rates expected to be in effect in the years in which those temporary differences are expected to be recovered or settled. We report any penalties and interest related to income taxes in income tax expense. We provide a valuation allowance for deferred tax assets when it is more likely than not that the related benefits will not be realized. The determination of recording or releasing tax valuation allowances is made pursuant to an assessment performed by management regarding the likelihood that we will generate future taxable income against which benefits of our deferred tax assets may or may not be realized. This assessment requires management to exercise significant judgment and make estimates with respect to our ability to generate revenues, gross profits, operating income, and taxable income in future periods. |
| We utilize a two-step approach to recognizing and measuring uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon ultimate settlement. We consider many factors when evaluating and estimating our tax positions and tax benefits, which may require periodic adjustments and which may not accurately forecast actual outcomes. |
| Fair Value of Financial Instruments | Fair Value of Financial Instruments |
| The carrying values of cash and cash equivalents, restricted cash, trade and other receivables, and current liabilities approximate fair values, because of the short-term nature of these items. Prior to the conversion in connection with our IPO, we carried our convertible redeemable preferred stock warrant liability at fair value. |
| We determine the fair value of financial instruments using an exit price: the amount that would be received from the sale of an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. We use a three-tier value hierarchy, which prioritizes the inputs used in measuring fair value as follows: Level 1 – observable inputs such as quoted prices in active markets; Level 2 – inputs other than the quoted prices in active markets that are observable, either directly or indirectly; and Level 3 – unobservable inputs for which there is little or no market data, which requires us to develop our own assumptions. On a recurring basis, we measure certain financial assets and liabilities at fair value, including our cash equivalents and marketable securities. |
| Recently Issued Accounting Standards | Recently Issued Accounting Standards |
| In April 2014, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update (ASU) No. 2014-08, Reporting Discontinued Operations and Disclosures of Components of an Entity, which changes the criteria for determining which disposals can be presented as discontinued operations and modifies related disclosure requirements. The updated guidance defines discontinued operations as a disposal of a component or group of components that is disposed of or is classified as held for sale and represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results and expands the disclosure requirements for discontinued operations and adds new disclosures for individually significant dispositions that do not qualify as discontinued operations. ASU No. 2014-08 is effective for fiscal years, and interim reporting periods within those years, beginning after December 15, 2014. ASU No. 2014-08 would be applied to any future applicable transaction. |
| In May 2014, the FASB issued ASU 2014-09, which provides guidance for revenue recognition. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under today’s guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price, and allocating the transaction price to each separate performance obligation. This guidance will be effective for us in the first quarter of our fiscal year ending December 31, 2017. Early adoption is not permitted. The guidance permits the use of either the retrospective or cumulative effect transition method. We are currently in the process of evaluating the impact of the adoption of this ASU on our consolidated financial statements and have not yet selected a transition method. |
| In August 2014, the FASB issued ASU 2014-15, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern. The standard explicitly requires management to assess an entity’s ability to continue as a going concern every reporting period, including interim periods, and to provide related footnote disclosures in certain circumstances. ASU 2014-15 is effective for the annual period ending after December 15, 2016, and for interim periods thereafter, with early adoption permitted. We do not expect the adoption of ASU 2014-15 to have a significant impact on our consolidated financial statements. |
| Consumer Segment | |
| Revenue Recognition | Revenue Recognition—Consumer Segment |
| We recognize revenue from our services provided in our consumer segment when it is probable that the economic benefits associated with the transactions will flow to us and the amount of revenue can be measured reliably. This is normally demonstrated when persuasive evidence of an arrangement exists, the fee is fixed or determinable, performance of service has been delivered, and collection is reasonably assured. |
| We offer services to consumers primarily on an annual or monthly subscription basis that may include free trial periods. We typically bill subscription fees to our members’ credit card. We recognize revenue for subscriptions ratably from the last of cash receipt, activation of a member’s account, or expiration of free trial periods through the termination of the subscription period. |
| We also provide consumer services for which the primary customer is a corporation or other entity that purchases identity theft protection services on behalf of its employees or customers. In such cases, we defer revenue for each member (employees or customers) until the member’s account has been activated. We then recognize revenue ratably over the remaining term of the individual subscription periods. |
| We use an external sales force, referred to as Certified Referring Partners (“CRP”), that earn commissions for sales to individual members and corporations. Because we are primarily responsible for fulfillment of the service obligation, determine service specifications, and have latitude in establishing prices for our service agreements, we record all sales made by our CRPs as revenue and the related commissions as a sales and marketing expense. |
| Enterprise Segment | |
| Revenue Recognition | Revenue Recognition—Enterprise Segment |
| Customer contract terms within our enterprise segment are generally monthly, and revenue is recognized when all of the following criteria are met: persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the price is fixed or determined, and collection is reasonably assured. |
| We recognize revenue from transaction-based services provided under hosted arrangements based on a negotiated fee per transaction. In some cases, we also negotiate a monthly minimum transaction fee, which may increase over the life of the contract. We bill and record transaction fees in excess of any of the monthly minimum fees as revenue in addition to the monthly minimum fees. In some instances, we receive an up-front, nonrefundable payment against which we apply the monthly minimum transaction fees. The up-front, nonrefundable payment is recorded as deferred revenue and recognized as revenue ratably over the usage period as we do not have sufficient evidence to accurately estimate a different pattern of usage. In other instances, the monthly minimum transaction fees are collected monthly, and we recognize revenue based on the negotiated monthly minimum transaction fees billed. |
| We record revenue from projects where we are engaged to deliver a report at the end of the analysis upon delivery and acceptance of the report. |
