Basis of Presentation and Significant Accounting Policies (Policies)	12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the U.S. of America (“GAAP”) and in accordance with the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). References to the Accounting Standard Codification (“ASC”) and Accounting Standard Updates (“ASU”) included hereinafter refer to the Accounting Standards Codification and Updates established by the Financial Accounting Standards Board (“FASB”) as the source of authoritative GAAP. The consolidated financial statements include the accounts of Metromile, Inc. and its subsidiaries, all of which are wholly owned. All intercompany accounts and transactions have been eliminated in consolidation.
Reclassifications	Reclassifications have been made to the prior year balances to conform to the current year presentation. In particular, accounts receivable has been combined with prepaid expenses and other assets into a single line on the consolidated balance sheets. The reclassifications had no effect on stockholders’ deficit or net loss after taxes as previously reported.
Use of Estimates	The preparation of consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and the accompanying notes. The Company’s principal estimates include unpaid losses and LAE reserves; the fair value of investments; the fair value of share-based awards; the fair value of the warrant liability; premium refunds to policyholders; reinsurance recoverable on unpaid loss; and the valuation allowance for income taxes. Because of uncertainties associated with estimating the amounts, timing and likelihood of possible outcomes, actual results could differ materially from these estimates.
Revenue Recognition	Insurance Services The Company’s insurance services are accounted for in accordance with Topic 944, Insurance. Policies are written for six-month terms and are considered short-duration contracts for the purposes of accounting under U.S. GAAP. The premium for the policies provides for a base rate per month for the entire policy term, plus a per-mile rate multiplied by the mileage driven each day (based on data from the telematics device subject to a daily maximum). Upon the binding of the policy, the customer pays at least the first month’s base rate and then is billed monthly in arrears for the mileage-based premium portion of the policy plus each subsequent month’s base rate not otherwise prepaid upon binding of the policy. Base premiums are recognized ratably over the policy term and mileage-based premiums are recognized monthly as incurred. All earned premiums are presented net of bad debt expense in the Company’s consolidated statement of operations. Investment Income Investment income is recorded as earned. Investment income consists primarily of interest on the Company’s highly liquid fixed income securities and is recognized on an accrual basis. Other Revenue Other revenue principally consists of enterprise revenue discussed below, reinsurance profit commissions based on performance of the ceded business, commission on NGI policies, and revenue related to policy acquisition costs as part of the reinsurance arrangement as described in Note 10, Reinsurance. The commission on NGI policies is recognized on a net basis and was insignificant in the periods presented. The revenue related to the acquisition costs for policies newly ceded to the reinsurers is recognized as the policies become part of the reinsurance arrangement. No amounts are due back to the reinsurers should a ceded policy cancel after entering the reinsurance arrangement. Enterprise services are accounted for by applying the requirements of Topic 606, Revenue from Contracts with Customers. Topic 606 establishes a principle for recognizing revenue upon the transfer of promised goods or services to customers, in an amount that reflects the expected consideration received in exchange for those goods or services. Topic 606 also includes Subtopic 340-40, Other Assets and Deferred Costs-Contracts with Customers, which requires the deferral of incremental costs of obtaining a contract with a customer. Collectively, references to Topic 606 used herein refer to both Topic 606 and Subtopic 340-40. The Company accounts for revenue contracts with customers by applying the requirements of Topic 606, which includes the following steps: • Identification of the contract, or contracts, with a customer • Identification of the performance obligations in the contract • Determination of the transaction price • Allocation of the transaction price to the performance obligations in the contract • Recognition of revenue when, or as, the Company satisfies a performance obligation The Company has developed technologies intended for internal use to service their insurance business and through its enterprise services offers these products and services to third party customers. The Company also has referral agreements with third party carriers and ad exchange agreements whereby the Company can receive consideration for such services. As such, the Company has three categories of revenue agreements that are included within the scope of Topic 606: 1) subscription and professional services agreements, 2) referral agreements, and 3) ad exchange agreements. For the periods presented, the Company’s revenues from referral and ad exchange agreements have not been significant. The Company’s technology agreements include software subscription-as-a-service (“SaaS”) which provides the customer with the right to access the Company’s core software via a hosted solution. Customers who purchase the SaaS service also receive technical support and access to updates and upgrades. The Company’s performance obligations related to its SaaS offering is a stand-ready obligation to provide the customer with continuous access to the hosted service as well as to provide updates/upgrades and technical support. Access to the platform represents a series of distinct services as the Company continually provides access to, and fulfills its obligation to, the end customer over the subscription term. The series of distinct services represents a single performance obligation that is satisfied over time. The Company recognizes revenue ratably because the customer receives and consumes the benefits of the platform throughout the contract period. During the year ended December 31, 2020, the Company sold a perpetual license for its software. Revenue for this license was recognized up-front upon delivery of the software license. There were no perpetual license sales in 2021. In addition, the Company offers customization and implementation services for customers. Customization services are provided when a customer requests the development of a specific feature and/or functionality that is not currently present within the solution as of the date of execution of the agreement. Implementation services include installation, custom builds, data migration, integration to other application programming interfaces, and training of customer personnel. Both customization and implementation services are priced based on mutual negotiation and subject to Company approvals. Occasionally, these services are offered at a discount or included as a bundle with pricing for the software or SaaS products. These services are not considered to represent distinct performance obligations and when present are combined with the overall subscription service. Revenue recognition begins when all services have been completed and are made available to customers. Deferred Contract Acquisition Costs Prior to the adoption of Topic 606 on January 1, 2019, sales commissions associated with the Company’s technology agreements were not deferred and expensed as incurred. Under Topic 606, the Company recognizes an asset for the incremental costs of obtaining a contract with a customer if the entity expects to recover such costs. Sales commissions are considered incremental and recoverable costs of obtaining a contract with a customer. Contract acquisition costs are accrued and capitalized upon execution of the sales contract by the customer. The Company allocates commission costs to the performance obligations in an arrangement consistent with the allocation of the transaction price. The portion of these costs that are attributed to performance obligations delivered over time are capitalized and recorded in prepaid expense and other current assets on the Company’s consolidated balance sheets. Deferred contract costs on the Company’s consolidated balance sheets were approximately $0.1 million and $0.2 million as of December 31, 2021 and 2020, respectively. Amortization expense related to deferred contract costs through the years ended December 31, 2021 and 2020 was not significant. There was no impairment loss in relation to the costs capitalized for the periods presented. Deferred Revenue The deferred revenue balance consists of subscription and professional services for the Company’s technology agreements which have been invoiced in advance of when the revenue recognition criteria are met. The Company’s subscription contracts are typically invoiced to its customers at the beginning of the term, or in some instances, such as in multi-year arrangements, in annual installments. Accordingly, the Company’s deferred revenue balance does not include revenues for future years of multi-year non-cancellable contracts that have not yet been billed. The Company recognizes subscription revenue ratably over the contract term beginning on the date that services are made available to customers, which may be after the contract commencement date if additional customization or implementation services are required to make the subscription service available to customers. On the contract commencement date, the Company records amounts due in accounts receivable and in deferred revenue. To the extent the Company bills customers in advance of the contract commencement date, the accounts receivable and corresponding deferred revenue amounts are netted to zero on the consolidated balance sheets, unless such amounts have been paid as of the balance sheet date. The Company recognized $2.9 million and $2.3 million of revenue during the years ended December 31, 2021, and 2020, respectively, that was previously included in the deferred revenue. Remaining Performance Obligations Remaining performance obligations represent contracted revenues that are non-cancellable and have not yet been recognized due to unsatisfied or partially satisfied performance obligations. This includes deferred revenues and amounts that will be invoiced and recognized as revenues in future periods.
Losses and Loss Adjustment Expenses and Loss and Loss Adjustment Expenses Reserves	The Insurance Company’s losses and LAE are presented net of any reinsurance and charged to income as incurred. The liabilities for unpaid losses and LAE represent the estimated liabilities for reported claims, claims incurred but not yet reported, and the related LAE. Losses and loss adjustment expenses also includes the LAE related to NGI as well as LAE incurred directly, including claims personnel and related expenses, compensation related to customer experience, depreciation on telematics devices, packaging and postage for shipping devices to customers, fulfillment service center costs, and third-party web-hosting costs. Liability for unpaid losses and LAE for policies underwritten by the Insurance Company represents management’s best estimate of the ultimate net cost of all reported and unreported losses incurred during the years ended December 31, 2021 and prior. The reserves for unpaid losses and LAE are estimated using individual case-basis valuations and statistical analyses. Estimated reserves are computed in accordance with accepted actuarial standards and principles. Several different actuarial approaches are considered, and reserve estimates may rely on a single or multiple techniques, depending on the appropriateness of the technique in a given situation. One branch of techniques that is frequently relied upon belongs to chain ladder methods in which data is aggregated into appropriate accident periods (when a claim occurred) and historical loss patterns are applied to actual paid losses and reported losses (paid losses plus individual case reserves as established by claim adjusters). The chain ladder method uses a ratio of losses from consecutive periods to calculate a development factor amongst various accident periods at similar maturities. An age-to-age factor is the expected development for future accident periods at a similar maturity. This is judgmentally selected based on a variety of inputs including, but not limited to, industry trends, company-specific trends, changes in claims handling practices, and changes in judicial environment and other external influences. Age-to-age factors are then multiplied and applied to the known losses to estimate the ultimate loss. The primary assumption of this approach is that historical development patterns are predictive of how current and future accident periods will develop. Modifications and variations of this approach can be made to better address certain issues that may arise, such as a sudden change in claim reserving process from claim adjusters, changes in payment and closure rate of claims, and external factors. Large losses, severe weather events, and other catastrophic events may significantly increase the variance of development patterns. These may be capped or excluded in the data and analyzed separately. The use of these methods on paid data as opposed to reported data has both benefits and drawbacks. For a sufficiently large dataset, paid data tends to be more stable, but may finalize later, creating additional uncertainty and potential to both over- and under-estimate reserves. For newer, immature accident periods, approaches using paid data may create very volatile estimates as a relatively small amount has been paid, which is then multiplied by a large multiplier from the age-to-age factors as described above. Reported data includes payments made to date as well as the best estimate from claim adjusters of future payments. The claim adjusters are able to review each claim and incorporate facts about each individual event to estimate losses on a claim-by-claim basis. Reported data tends to require less future development than paid data, which decreases the potential variance from the ultimate amount to be paid for a claim. It may however be influenced by changes in claims reserving and settlement practices, which need to be accounted for when using historical data to predict future liabilities. The estimates are subject to the effects of trends in loss severity and frequency. Although considerable variability is inherent in such estimates, management believes the reserves for losses and LAE are adequate. The estimates are continually reviewed and adjusted as necessary as experience develops or new information becomes known; such adjustments are included in the current year’s operations. Salvage and subrogation recoverables are estimated using the case basis method or historical statistics. Salvage and subrogation estimated recoverables are deducted from the liability for unpaid losses and LAE.
Reinsurance	The Company enters into ceded reinsurance contracts to protect its business from losses due to concentration of risk and to manage its operating leverage ratios. The Company has entered into quota-share reinsurance agreements with reinsurers under which risks are covered on a pro-rata basis for all policies underwritten by the Insurance Company. Premiums ceded to reinsurers are reported as a reduction of premiums written, and expenses incurred in connection with ceded policies have been accounted for as a reduction of the Company’s related deferred policy acquisition costs. The Company is exposed to credit risk from reinsurance recoverables and prepaid reinsurance premiums, which is mitigated by using a trust account.
Cash, Cash Equivalents and Restricted Cash	For purposes of the consolidated financial statements, the Company considers all highly liquid debt instruments purchased with an original maturity of three months or less to be cash equivalents. The Company’s operating cash is held in an overnight sweep account. The Company’s cash is maintained in checking accounts, money market funds, and other highly liquid fixed income investments. Certain of the Company’s cash accounts are restricted. The Company holds certificates of deposits as collateral on its letters of credit in conjunction with its office leases and corporate credit cards. As part of the Company’s debt arrangement, a certain cash minimum must be maintained in a separate bank account as part of the debt covenants. The Company also collects insurance policy premiums that it holds in a segregated account for transmittal to the applicable underwriting carrier or for the benefit of policyholders for insurance-related claims. Cash held by the Insurance Company is restricted for use by the Insurance Company for the benefit of its policyholders.
Concentrations of Credit Risk	Financial instruments that potentially subject the Company to concentrations of credit risk, to the extent of the amounts recorded on the consolidated balance sheets, consist principally of cash and marketable securities. The Company, at times, maintains cash balances with its primary bank in excess of Federal Deposit Insurance Corporation limits. The Company places its cash and cash equivalents with financial institutions with high credit standing. The Company places its excess cash in marketable investment grade securities. There are no significant concentrations in any one issuer of debt securities. The ceding of insurance does not legally discharge the Company from its primary liability for the full amount of the policy coverage, and therefore the Company will be required to pay the loss and bear collection risk if the reinsurer fails to meet its obligations under the reinsurance agreement. To minimize exposure to significant losses from reinsurance insolvencies, the Company evaluates the financial condition of its reinsurers and monitors concentrations of credit risk.
Marketable Securities	The Company classifies marketable investment securities as available-for-sale. Interest income and dividends on securities are recognized in income on an accrual basis. Premiums and discounts on debt securities are amortized as an adjustment to interest income using the interest method. These securities are reported at their estimated fair value with unrealized gains and losses reported as a separate component of comprehensive income in stockholders’ deficit and classified into unrestricted and restricted marketable securities. Purchases and sales of investments are recorded on a trade date basis. Realized gains and losses are determined based on the specific identification method. Certain marketable securities are restricted as they are held by the Insurance Company and are either pledged as statutory deposits for state licenses or restricted as to the distribution of the assets of the Insurance Company under the regulations of the State of Delaware.
Telematics Devices, Improvements, and Equipment, Net	Telematics devices, improvements, and equipment are stated at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets, which is generally estimated to be three to five years. Leasehold improvements are amortized using the straight-line method over the shorter of the remaining lease term or the estimated useful lives of the improvements. Maintenance and repairs are charged to expense as incurred; major renewals and betterments are capitalized.
Website and Software Development Costs, Net	Costs related to the planning and post-implementation phases of the Company’s website and software development efforts are recorded as an operating expense. Direct costs incurred in the development phase of major development efforts and upgrades are capitalized and amortized using the straight-line method over an estimated useful life, generally estimated to be three years.
Deferred Policy Acquisition Costs ("DPAC")	The Company defers sales commissions and expenses, marketing and underwriting costs, net of reinsurance ceding commission, directly relating to the successful acquisition of policies that the GA Subsidiary binds, and costs related to written premiums to the extent they are considered recoverable. These costs are then expensed over the customer’s policy term including estimated renewal periods. The method followed to determine the deferred policy acquisition costs limits the deferral to its realizable value by considering estimated future claims and expenses to be incurred as premiums are earned. Changes in estimates, if any, are recorded in the accounting period in which changes are determined. When anticipated losses, LAE, commissions, and other policy acquisition costs exceed recorded unearned premium, any future premiums on existing policies, and anticipated investment income on existing policies, a premium deficiency reserve is recognized by recording a reduction to DPAC with a corresponding charge to operations. The Company does not include anticipated investment income as a factor in the premium deficiency calculations. The Company concluded that no premium deficiency adjustments were necessary through December 31, 2021 and 2020. Any excess ceding commissions over and above the portion that represents a recovery of deferred policy acquisition costs is recorded as a deferred liability and amortized over the same period in which the related premiums are earned.
Impairment of Long-Lived Assets	The Company evaluates the carrying amount of its long-lived assets, primarily telematics devices, improvements, equipment, website and software development costs, and policy acquisition costs for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. The Company assesses recoverability using undiscounted cash flows attributed to that asset. If impairment has occurred, any excess of the carrying value over the fair value is recorded as a loss. No impairment occurred during the years presented. Indefinite-lived intangible assets, such as the Company’s insurance licenses included as intangible assets on the accompanying consolidated balance sheets, are subject to annual impairment testing. On an annual basis or more frequently if a triggering event occurs, the fair value of indefinite-lived intangible assets are evaluated to determine if an impairment charge is required.
Digital Assets, Net	During the year ended December 31, 2021, the Company purchased an aggregate of $1.0 million in digital assets, comprised solely of bitcoin. The Company currently accounts for these digital assets as indefinite-lived intangible assets in accordance with ASC 350, Intangibles—Goodwill and Other. The Company has ownership of and control over the purchased bitcoin asset and uses third-party custodial services to secure it. The digital assets are initially recorded at cost and are subsequently remeasured on the consolidated balance sheets at cost, net of any impairment losses incurred since acquisition. An impairment analysis is performed at each reporting period to identify whether events or changes in circumstances, in particular decreases in the quoted prices on active exchanges, indicate that it is more likely than not that digital assets held by the Company are impaired. The fair value of digital assets is determined on a nonrecurring basis in accordance with ASC 820, Fair Value Measurement, based on quoted prices on the active exchange(s) that the Company has determined is its principal market for bitcoin (Level 1 inputs). If the carrying value of the digital asset exceeds the fair value based on the lowest price quoted in the active exchanges during the period, an impairment loss has occurred with respect to those digital assets in the amount equal to the difference between their carrying values and the price determined. Impairment losses are recognized within Other expense in the consolidated statements of operations in the period in which the impairment is identified. The impaired digital assets are written down to their fair value at the time of impairment and this new cost basis will not be adjusted upward for any subsequent increase in fair value.
Warrants Liability	We classify warrants to purchase shares of our common stock that are contingently puttable or redeemable as liabilities. Such warrants are measured and recognized at fair value and are subject to remeasurement at each balance sheet date. The fair value of our private warrant liabilities is measured using a Black-Scholes ("BSM") option-pricing model whereas the fair value of our public warrants are measured using level 1 inputs. Under the BSM option-pricing model, the fair value is measured using the following assumptions and inputs: exercise price, fair value of the underlying preferred stock, expected term, expected volatility, and risk-free interest rate. We classify the warrants as a liability on our consolidated balance sheets as of December 31, 2021 and December 31, 2020. The warrant liabilities are measured at fair value at inception and on a recurring basis, with changes in fair value presented within change in fair value of warrant liabilities in the consolidated statement of operations. Prior to Merger, we had warrants exercisable for convertible preferred stock which were exercised at the time of the Merger and no longer considered outstanding. These warrants were measured using the BSM option pricing-model.
Stock-Based Compensation	Stock-based compensation is measured at the grant date based on the fair value of the award and is recognized as expense over the requisite service period, which is generally the vesting period of the respective award. The expense recorded is based on awards ultimately expected to vest and, therefore, is reduced by estimated forfeitures. Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. The Company calculates the fair value of options using the Black-Scholes option pricing model and recognizes expense using the straight-line attribution approach. As of December 31, 2021, the Company has granted stock options and RSUs with service conditions as well as RSUs with performance conditions and market conditions. Awards with performance conditions and no service conditions are expensed when the performance condition is deemed probable of being achieved and is based on the fair value of the award at that time. Unlike a service or performance condition, a market condition is not a vesting condition but is directly factored into the fair-value-based measure of an award. Compensation cost thus is recognized for an award with a market condition provided that the good is delivered or the service is rendered, regardless of when, if ever, the market condition is satisfied.
Advertising Expenses	The Company expenses advertising costs as incurred.
Income Taxes	The Company accounts for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, the Company determines deferred tax assets and liabilities on the basis of the differences between the financial statement and tax bases of assets and liabilities by using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date. The Company recognizes deferred tax assets to the extent that it believes that these assets are more likely than not to be realized. In making such a determination, the Company considers all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies, and results of recent operations. If the Company determines that it would be able to realize its deferred tax assets in the future in excess of their net recorded amount, the Company would make an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes. The Company records uncertain tax positions on the basis of a two-step process in which (1) it determines whether it is more likely than not that the tax positions will be sustained on the basis of the technical merits of the position and (2) for those tax positions that meet the more-likely-than-not recognition threshold, the Company recognizes the largest amount of tax benefit that is more than 50 percent likely to be realized upon ultimate settlement with the related tax authority. The Company recognizes accrued interest and penalties, if any, related to unrecognized tax benefits as income tax expense.
Net Loss per Share	Basic and diluted net loss per share attributable to common stockholders is presented in conformity with the two-class method required for participating securities. The Company considers all series of its redeemable convertible preferred stock to be participating securities. Under the two-class method, the net loss attributable to common stockholders is not allocated to the redeemable convertible preferred stock as the holders of its redeemable convertible preferred stock do not have a contractual obligation to share in the Company’s losses. Under the two-class method, net income is attributed to common stockholders and participating securities based on their participation rights. Under the two-class method, basic net loss per share attributable to common stockholders is computed by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period. Diluted earnings per share attributable to common stockholders adjusts basic earnings per share for the potentially dilutive impact of stock options and redeemable convertible preferred stock. As the Company has reported losses for the years presented, all potentially dilutive securities are antidilutive and accordingly, basic net loss per share equals diluted net loss per share. As of December 31, 2021, the Company no longer had convertible preferred stock. During this period, basic earnings per share was computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. The computation of diluted earnings per share reflected the effect of potentially dilutive securities. As the Company has reported losses for the years presented, all potentially dilutive securities are antidilutive and accordingly, basic net loss per share equals diluted net loss per share.
Leases	The Company leases real estate facilities under non-cancellable and cancellable operating leases with various expiration dates through fiscal year 2030. At the inception of an arrangement, the Company determines whether the arrangement is or contains a lease based on the unique facts and circumstances present, the existence of an identified asset(s), if any, and the Company’s control over the use of the identified asset(s), if applicable. The Company adopted ASU 2016-02, Leases (Topic 842) on January 1, 2021. The Company elected the package of practical expedients for transition under which the Company did not reassess its prior conclusions about lease identification, lease classification and initial direct costs. Additionally, the Company elected the hindsight and land easement practical expedients for transition under which conclusions around lease term, impairment and land easements will not be reassessed. The Company did not apply the portfolio approach to its lease agreements. Operating leases are included in prepaid expenses and other assets and in other liabilities in the accompanying consolidated balance sheets. Operating lease assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Operating lease assets and lease liabilities are recognized at the lease inception date based on the present value of lease payments over the lease term, discounted based on the more readily determinable of (i) the rate implicit in the lease or (ii) the Company’s incremental borrowing rate (which is the estimated rate the Company would be required to pay for a collateralized borrowing equal to the total lease payments over the term of the lease). Because the Company’s operating leases generally do not provide an implicit rate, the Company estimates its incremental borrowing rate based on the information available at lease commencement date utilizing peer company data for borrowings with a similar term. The Company’s operating lease assets are measured based on the corresponding operating lease liability adjusted for (i) payments made to the lessor at or before the commencement date, (ii) initial direct costs incurred and (iii) tenant incentives under the lease. The Company does not assume renewals or early terminations unless it is reasonably certain to exercise these options at commencement. The Company elected the practical expedient which allows the Company to not allocate consideration between lease and non-lease components. Variable lease payments are recognized in the period in which the obligation for those payments is incurred. In addition, the Company elected the practical expedient such that it does not recognize lease assets or lease liabilities for leases with a term of 12 months or less of all asset classes. Operating lease expense is recognized on a straight-line basis over the lease term. The Company’s lease agreements generally do not contain any residual guarantees or restrictive covenants.
Accounting Pronouncements	The Company adopted the following accounting standards during the year ended December 31, 2021: Financial Instruments - Credit Losses In June 2016, FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”), intended to improve the timing, and enhance the accounting and disclosure, of credit losses on financial assets. The updated guidance applies a new credit loss model (current expected credit losses or "CECL") for determining credit-related impairments for financial instruments measured at amortized cost (including reinsurance recoverables, and premiums receivables) and requires an entity to estimate the credit losses expected over the life of an exposure or pool of exposures. The estimate of expected credit losses should consider historical information, current information, as well as reasonable and supportable forecasts, including estimates of prepayments. The expected credit losses, and subsequent adjustments to such losses, are recorded through an allowance account that is deducted from the amortized cost basis of the financial asset, with the net carrying value of the financial asset presented on the consolidated balance sheets at the amount expected to be collected. The updated guidance also amends the previous other-than-temporary impairment model for available-for-sale debt securities by requiring the recognition of impairments relating to credit losses through an allowance account and limits the amount of credit loss to the difference between a security’s amortized cost basis and its fair value. Effective on January 1, 2021, the Company adopted this standard using the modified retrospective transition method. For available-for-sale debt securities, the updated guidance was applied prospectively. For financial instruments measured at amortized cost, the adoption had no impact on the accumulated deficit on the consolidated balance sheets as of January 1, 2021. Leases In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) (“ASU 2016-02”), as subsequently amended which requires an entity to recognize assets and liabilities arising from a lease for both financing (formerly referred to as capital) and operating leases. ASU 2016-02 also requires new qualitative and quantitative disclosures to help investors and other financial statement users better understand the amount, timing, and uncertainty of cash flows arising from leases. ASU 2016-02 was effective for the Company in its annual reporting period beginning after December 15, 2021, with early adoption permitted. The Company adopted this ASU as of January 1, 2021 using the modified retrospective approach. In addition, the standard allows for certain practical expedients in transition to ASC 842, including the package of practical expedients. The Company elected to utilize the package of practical expedients which allowed the Company to not reassess the following: (i) whether any expired or existing contracts contained leases; (ii) the lease classification for any expired or existing leases; and (iii) the treatment of initial direct costs for any existing leases. ASU 2018-01, Land Easement Practical Expedient for Transition to Topic 840 (“ASU 2018-01”) is effective for the Company upon adopting ASC 842. The Company adopted this ASU as of January 1, 2021 and will not reassess whether any land easements not previously accounted for as leases under Topic 840 meet the definition of a lease. The adoption of this standard resulted in the recognition of operating lease liabilities and right-of-use assets of $21.2 million and $15.9 million for its various leases with maturity dates through 2030. The Company will depreciate the right of use ("ROU") assets over the respective lease terms accordingly. The difference between the ROU assets and lease liabilities is the unamortized balance of deferred rent, which prior to January 1, 2021, was included as a separate liability within other liabilities. The operating lease expenses are included in other operating expenses in the Company’s consolidated statements of operations. The adoption did not impact beginning accumulated deficit, or prior year consolidated statements of operations and comprehensive loss and statement of cash flows as the Company elected the practical expedient that allows comparative financial statements under ASC 840. The Company included the disclosures required by ASU 2016-02 in the Leases, Commitments and Contingencies footnote. Income Taxes ASU 2019-12, Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes, simplifies the various aspects related to accounting for income taxes by removing certain exceptions to the general principles in Topic 740 and clarifies and amends the existing guidance to improve consistent application. The adoption of ASU 2019-12 beginning January 1, 2021 did not have a material impact on the Company's consolidated financial statements and related disclosures. Reference Rate Reform In March 2020, FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides optional expedients and exceptions to contract modifications and hedging relationships that reference LIBOR or another reference rate expected to be discontinued. The standard is effective upon issuance through December 31, 2022 and may be applied at the beginning of the interim period that includes March 12, 2020 or any date thereafter. The Company is currently evaluating this new standard and the impact it will have on its consolidated financial statements. This standard may be elected and applied prospectively over time from March, 2020 through December 31, 2022 as reference rate reform activities occur. The Company is evaluating the method of adoption and impact of the standard on its consolidated financial statements and related disclosures. Government Assistance In November 2021, the FASB issued ASU 2021-10, Government Assistance (Topic 832): Disclosures by Business Entities about Government Assistance. This update requires annual disclosures about transactions with a government that are accounted for by applying a grant or contribution accounting model by analogy. This standard is effective for annual periods beginning after December 15, 2021. Early adoption is permitted. The amendments should be applied either (1) prospectively to all transactions within the scope of the amendments that are reflected in financial statements at the date of initial application and new transactions that are entered into after the date of initial application or (2) retrospectively to those transactions. The Company is currently evaluating the impact of these amendments on its consolidated financial statements.
Fair Value Measurement	Cash and Cash Equivalents The Company’s cash and cash equivalents are demand and money market accounts and other highly liquid investments with an original maturity of three months or less. Demand and money market accounts are at stated values. Fair values for other cash equivalents are classified as Level 1 and are based upon appropriate valuation methodology. Marketable Securities — Available-for-sale The Company classifies highly liquid money market funds, U.S. Treasury bonds and certificates of deposit within Level 1 of the fair value hierarchy because they are valued based on quoted market prices in active markets and upon models that take into consideration such market-based factors as recent sales, risk-free yield curves, and prices of similarly rated bonds. Commercial paper, corporate bonds, corporate debt securities, repurchase agreements, and asset backed securities are classified within Level 2 because they are valued using inputs other than quoted prices that are directly or indirectly observable in the market, including readily available pricing sources for the identical underlying security which may not be actively traded. Public and Private Warrants At the Closing, Metromile Operating Company acquired the net liabilities from INSU, including warrants exercisable for common stock. The Company estimated the fair value of warrants exercisable for common stock measured at fair value on a recurring basis at the respective dates using the public trading price, for the Public warrants, and the Black-Scholes option valuation model, for the Private placement warrants (together with the public warrants, the “Warrants”), respectively. The Black-Scholes option valuation model inputs are based on the estimated fair value of the underlying common stock at the valuation measurement date, the remaining contractual term of the warrant, the risk-free interest rates, the expected dividends, and the expected volatility of the price of the Company’s underlying stock. These estimates, especially the expected volatility, are highly judgmental and could differ materially in the future. The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. The Company considers its Public warrants to be Level 1 liabilities as it uses publicly and readily available information to measure the fair value of the warrants. For the Company's Private placement warrants, while the Company believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date and as such are classified as Level 2 liabilities.

Basis of Presentation and Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2021

The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the U.S. of America (“GAAP”) and in accordance with the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). References to the Accounting Standard Codification (“ASC”) and Accounting Standard Updates (“ASU”) included hereinafter refer to the Accounting Standards Codification and Updates established by the Financial Accounting Standards Board (“FASB”) as the source of authoritative GAAP. The consolidated financial statements include the accounts of Metromile, Inc. and its subsidiaries, all of which are wholly owned. All intercompany accounts and transactions have been eliminated in consolidation.

Reclassifications

Reclassifications have been made to the prior year balances to conform to the current year presentation. In particular, accounts receivable has been combined with prepaid expenses and other assets into a single line on the consolidated balance sheets. The reclassifications had no effect on stockholders’ deficit or net loss after taxes as previously reported.

Use of Estimates

The preparation of consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and the accompanying notes. The Company’s principal estimates include unpaid losses and LAE reserves; the fair value of investments; the fair value of share-based awards; the fair value of the warrant liability; premium refunds to policyholders; reinsurance recoverable on unpaid loss; and the valuation allowance for income taxes. Because of uncertainties associated with estimating the amounts, timing and likelihood of possible outcomes, actual results could differ materially from these estimates.

Revenue Recognition

Insurance Services

The Company’s insurance services are accounted for in accordance with Topic 944, Insurance. Policies are written for six-month terms and are considered short-duration contracts for the purposes of accounting under U.S. GAAP. The premium for the policies provides for a base rate per month for the entire policy term, plus a per-mile rate multiplied by the mileage driven each day (based on data from the telematics device subject to a daily maximum). Upon the binding of the policy, the customer pays at least the first month’s base rate and then is billed monthly in arrears for the mileage-based premium portion of the policy plus each subsequent month’s base rate not otherwise prepaid upon binding of the policy. Base premiums are recognized ratably over the policy term and mileage-based premiums are recognized monthly as incurred. All earned premiums are presented net of bad debt expense in the Company’s consolidated statement of operations.

Investment Income

Investment income is recorded as earned. Investment income consists primarily of interest on the Company’s highly liquid fixed income securities and is recognized on an accrual basis.

Other Revenue

Other revenue principally consists of enterprise revenue discussed below, reinsurance profit commissions based on performance of the ceded business, commission on NGI policies, and revenue related to policy acquisition costs as part of the reinsurance arrangement as described in Note 10, Reinsurance.

The commission on NGI policies is recognized on a net basis and was insignificant in the periods presented. The revenue related to the acquisition costs for policies newly ceded to the reinsurers is recognized as the policies become part of the reinsurance arrangement. No amounts are due back to the reinsurers should a ceded policy cancel after entering the reinsurance arrangement.

Enterprise services are accounted for by applying the requirements of Topic 606, Revenue from Contracts with Customers. Topic 606 establishes a principle for recognizing revenue upon the transfer of promised goods or services to customers, in an amount that reflects the expected consideration received in exchange for those goods or services. Topic 606 also includes Subtopic 340-40, Other Assets and Deferred Costs-Contracts with Customers, which requires the deferral of incremental costs of obtaining a contract with a customer. Collectively, references to Topic 606 used herein refer to both Topic 606 and Subtopic 340-40.

The Company accounts for revenue contracts with customers by applying the requirements of Topic 606, which includes the following steps:

• Identification of the contract, or contracts, with a customer

• Identification of the performance obligations in the contract

• Determination of the transaction price

• Allocation of the transaction price to the performance obligations in the contract

• Recognition of revenue when, or as, the Company satisfies a performance obligation

The Company has developed technologies intended for internal use to service their insurance business and through its enterprise services offers these products and services to third party customers. The Company also has referral agreements with third party carriers and ad exchange agreements whereby the Company can receive consideration for such services. As such, the Company has three categories of revenue agreements that are included within the scope of Topic 606: 1) subscription and professional services agreements, 2) referral agreements, and 3) ad exchange agreements. For the periods presented, the Company’s revenues from referral and ad exchange agreements have not been significant.

The Company’s technology agreements include software subscription-as-a-service (“SaaS”) which provides the customer with the right to access the Company’s core software via a hosted solution. Customers who purchase the SaaS service also receive technical support and access to updates and upgrades. The Company’s performance obligations related to its SaaS offering is a stand-ready obligation to provide the customer with continuous access to the hosted service as well as to provide updates/upgrades and technical support. Access to the platform represents a series of distinct services as the Company continually provides access to, and fulfills its obligation to, the end customer over the subscription term. The series of distinct services represents a single performance obligation that is satisfied over time. The Company recognizes revenue ratably because the customer receives and consumes the benefits of the platform throughout the contract period.

During the year ended December 31, 2020, the Company sold a perpetual license for its software. Revenue for this license was recognized up-front upon delivery of the software license. There were no perpetual license sales in 2021.

In addition, the Company offers customization and implementation services for customers. Customization services are provided when a customer requests the development of a specific feature and/or functionality that is not currently present within the solution as of the date of execution of the agreement. Implementation services include installation, custom builds, data migration, integration to other application programming interfaces, and training of customer personnel. Both customization and implementation services are priced based on mutual negotiation and subject to Company approvals. Occasionally, these services are offered at a discount or included as a bundle with pricing for the software or SaaS products. These services are not considered to represent distinct performance obligations and when present are combined with the overall subscription service. Revenue recognition begins when all services have been completed and are made available to customers.

Deferred Contract Acquisition Costs

Prior to the adoption of Topic 606 on January 1, 2019, sales commissions associated with the Company’s technology agreements were not deferred and expensed as incurred. Under Topic 606, the Company recognizes an asset for the incremental costs of obtaining a contract with a customer if the entity expects to recover such costs. Sales commissions are considered incremental and recoverable costs of obtaining a contract with a customer. Contract acquisition costs are accrued and capitalized upon execution of the sales contract by the customer. The Company allocates commission costs to the performance obligations in an arrangement consistent with the allocation of the transaction price. The portion of these costs that are attributed to performance obligations delivered over time are capitalized and recorded in prepaid expense and other current assets on the Company’s consolidated balance sheets.

Deferred contract costs on the Company’s consolidated balance sheets were approximately $0.1 million and $0.2 million as of December 31, 2021 and 2020, respectively. Amortization expense related to deferred contract costs through the years ended December 31, 2021 and 2020 was not significant. There was no impairment loss in relation to the costs capitalized for the periods presented.

Deferred Revenue

The deferred revenue balance consists of subscription and professional services for the Company’s technology agreements which have been invoiced in advance of when the revenue recognition criteria are met. The Company’s subscription contracts are typically invoiced to its customers at the beginning of the term, or in some instances, such as in multi-year arrangements, in annual installments. Accordingly, the Company’s deferred revenue balance does not include revenues for future years of multi-year non-cancellable contracts that have not yet been billed.

The Company recognizes subscription revenue ratably over the contract term beginning on the date that services are made available to customers, which may be after the contract commencement date if additional customization or implementation services are required to make the subscription service available to customers. On the contract commencement date, the Company records amounts due in accounts receivable and in deferred revenue. To the extent the Company bills customers in advance of the contract commencement date, the accounts receivable and corresponding deferred revenue amounts are netted to zero on the consolidated balance sheets, unless such amounts have been paid as of the balance sheet date.

The Company recognized $2.9 million and $2.3 million of revenue during the years ended December 31, 2021, and 2020, respectively, that was previously included in the deferred revenue.

Remaining Performance Obligations

Remaining performance obligations represent contracted revenues that are non-cancellable and have not yet been recognized due to unsatisfied or partially satisfied performance obligations. This includes deferred revenues and amounts that will be invoiced and recognized as revenues in future periods.

Losses and Loss Adjustment Expenses and Loss and Loss Adjustment Expenses Reserves

The Insurance Company’s losses and LAE are presented net of any reinsurance and charged to income as incurred. The liabilities for unpaid losses and LAE represent the estimated liabilities for reported claims, claims incurred but not yet reported, and the related LAE. Losses and loss adjustment expenses also includes the LAE related to NGI as well as LAE incurred directly, including claims personnel and related expenses, compensation related to customer experience, depreciation on telematics devices, packaging and postage for shipping devices to customers, fulfillment service center costs, and third-party web-hosting costs.

Liability for unpaid losses and LAE for policies underwritten by the Insurance Company represents management’s best estimate of the ultimate net cost of all reported and unreported losses incurred during the years ended December 31, 2021 and prior. The reserves for unpaid losses and LAE are estimated using individual case-basis valuations and statistical analyses. Estimated reserves are computed in accordance with accepted actuarial standards and principles. Several different actuarial approaches are considered, and reserve estimates may rely on a single or multiple techniques, depending on the appropriateness of the technique in a given situation. One branch of techniques that is frequently relied upon belongs to chain ladder methods in which data is aggregated into appropriate accident periods (when a claim occurred) and historical loss patterns are applied to actual paid losses and reported losses (paid losses plus individual case reserves as established by claim adjusters).

The chain ladder method uses a ratio of losses from consecutive periods to calculate a development factor amongst various accident periods at similar maturities. An age-to-age factor is the expected development for future accident periods at a similar maturity. This is judgmentally selected based on a variety of inputs including, but not limited to, industry trends, company-specific trends, changes in claims handling practices, and changes in judicial environment and other external influences. Age-to-age factors are then multiplied and applied to the known losses to estimate the ultimate loss. The primary assumption of this approach is that historical development patterns are predictive of how current and future accident periods will develop. Modifications and variations of this approach can be made to better address certain issues that may arise, such as a sudden change in claim reserving process from claim adjusters, changes in payment and closure rate of claims, and external factors. Large losses, severe weather events, and other catastrophic events may significantly increase the variance of development patterns. These may be capped or excluded in the data and analyzed separately.

The use of these methods on paid data as opposed to reported data has both benefits and drawbacks. For a sufficiently large dataset, paid data tends to be more stable, but may finalize later, creating additional uncertainty and potential to both over- and under-estimate reserves. For newer, immature accident periods, approaches using paid data may create very volatile estimates as a relatively small amount has been paid, which is then multiplied by a large multiplier from the age-to-age factors as described above. Reported data includes payments made to date as well as the best estimate from claim adjusters of future payments. The claim adjusters are able to review each claim and incorporate facts about each individual event to estimate losses on a claim-by-claim basis. Reported data tends to require less future development than paid data, which decreases the potential variance from the ultimate amount to be paid for a claim. It may however be influenced by changes in claims reserving and settlement practices, which need to be accounted for when using historical data to predict future liabilities.

The estimates are subject to the effects of trends in loss severity and frequency. Although considerable variability is inherent in such estimates, management believes the reserves for losses and LAE are adequate. The estimates are continually reviewed and adjusted as necessary as experience develops or new information becomes known; such adjustments are included in the current year’s operations. Salvage and subrogation recoverables are estimated using the case basis method or historical statistics. Salvage and subrogation estimated recoverables are deducted from the liability for unpaid losses and LAE.

Reinsurance

The Company enters into ceded reinsurance contracts to protect its business from losses due to concentration of risk and to manage its operating leverage ratios. The Company has entered into quota-share reinsurance agreements with reinsurers under which risks are covered on a pro-rata basis for all policies underwritten by the Insurance Company. Premiums ceded to reinsurers are reported as a reduction of premiums written, and expenses incurred in connection with ceded policies have been accounted for as a reduction of the Company’s related deferred policy acquisition costs. The Company is exposed to credit risk from reinsurance recoverables and prepaid reinsurance premiums, which is mitigated by using a trust account.

Cash, Cash Equivalents and Restricted Cash

For purposes of the consolidated financial statements, the Company considers all highly liquid debt instruments purchased with an original maturity of three months or less to be cash equivalents. The Company’s operating cash is held in an overnight sweep account. The Company’s cash is maintained in checking accounts, money market funds, and other highly liquid fixed income investments. Certain of the Company’s cash accounts are restricted. The Company holds certificates of deposits as collateral on its letters of credit in conjunction with its office leases and corporate credit cards. As part of the Company’s debt arrangement, a certain cash minimum must be maintained in a separate bank account as part of the debt covenants. The Company also collects insurance policy premiums that it holds in a segregated account for transmittal to the applicable underwriting carrier or for the benefit of policyholders for insurance-related claims. Cash held by the Insurance Company is restricted for use by the Insurance Company for the benefit of its policyholders.

Concentrations of Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk, to the extent of the amounts recorded on the consolidated balance sheets, consist principally of cash and marketable securities. The Company, at times, maintains cash balances with its primary bank in excess of Federal Deposit Insurance Corporation limits. The Company places its cash and cash equivalents with financial institutions with high credit standing. The Company places its excess cash in marketable investment grade securities. There are no significant concentrations in any one issuer of debt securities. The ceding of insurance does not legally discharge the Company from its primary liability for the full amount of the policy coverage, and therefore the Company will be required to pay the loss and bear collection risk if the reinsurer fails to meet its obligations under the reinsurance agreement. To minimize exposure to significant losses from reinsurance insolvencies, the Company evaluates the financial condition of its reinsurers and monitors concentrations of credit risk.

Marketable Securities

The Company classifies marketable investment securities as available-for-sale. Interest income and dividends on securities are recognized in income on an accrual basis. Premiums and discounts on debt securities are amortized as an adjustment to interest income using the interest method. These securities are reported at their estimated fair value with unrealized gains and losses reported as a separate component of comprehensive income in stockholders’ deficit and classified into unrestricted and restricted marketable securities. Purchases and sales of investments are recorded on a trade date basis. Realized gains and losses are determined based on the specific identification method. Certain marketable securities are restricted as they are held by the Insurance Company and are either pledged as statutory deposits for state licenses or restricted as to the distribution of the assets of the Insurance Company under the regulations of the State of Delaware.

Telematics Devices, Improvements, and Equipment, Net

Telematics devices, improvements, and equipment are stated at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets, which is generally estimated to be three to five years. Leasehold improvements are amortized using the straight-line method over the shorter of the remaining lease term or the estimated useful lives of the improvements. Maintenance and repairs are charged to expense as incurred; major renewals and betterments are capitalized.

Website and Software Development Costs, Net

Costs related to the planning and post-implementation phases of the Company’s website and software development efforts are recorded as an operating expense. Direct costs incurred in the development phase of major development efforts and upgrades are capitalized and amortized using the straight-line method over an estimated useful life, generally estimated to be three years.

Deferred Policy Acquisition Costs ("DPAC")

The Company defers sales commissions and expenses, marketing and underwriting costs, net of reinsurance ceding commission, directly relating to the successful acquisition of policies that the GA Subsidiary binds, and costs related to written premiums to the extent they are considered recoverable. These costs are then expensed over the customer’s policy term including estimated renewal periods. The method followed to determine the deferred policy acquisition costs limits the deferral to its realizable value by considering estimated future claims and expenses to be incurred as premiums are earned. Changes in estimates, if any, are recorded in the accounting period in which changes are determined.

When anticipated losses, LAE, commissions, and other policy acquisition costs exceed recorded unearned premium, any future premiums on existing policies, and anticipated investment income on existing policies, a premium deficiency reserve is recognized by recording a reduction to DPAC with a corresponding charge to operations. The Company does not include anticipated investment income as a factor in the premium deficiency calculations. The Company concluded that no premium deficiency adjustments were necessary through December 31, 2021 and 2020.

Any excess ceding commissions over and above the portion that represents a recovery of deferred policy acquisition costs is recorded as a deferred liability and amortized over the same period in which the related premiums are earned.

Impairment of Long-Lived Assets

The Company evaluates the carrying amount of its long-lived assets, primarily telematics devices, improvements, equipment, website and software development costs, and policy acquisition costs for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. The Company assesses recoverability using undiscounted cash flows attributed to that asset. If impairment has occurred, any excess of the carrying value over the fair value is recorded as a loss. No impairment occurred during the years presented. Indefinite-lived intangible assets, such as the Company’s insurance licenses included as intangible assets on the accompanying consolidated balance sheets, are subject to annual impairment testing. On an annual basis or more frequently if a triggering event occurs, the fair value of indefinite-lived intangible assets are evaluated to determine if an impairment charge is required.

Digital Assets, Net

During the year ended December 31, 2021, the Company purchased an aggregate of $1.0 million in digital assets, comprised solely of bitcoin. The Company currently accounts for these digital assets as indefinite-lived intangible assets in accordance with ASC 350, Intangibles—Goodwill and Other. The Company has ownership of and control over the purchased bitcoin asset and uses third-party custodial services to secure it. The digital assets are initially recorded at cost and are subsequently remeasured on the consolidated balance sheets at cost, net of any impairment losses incurred since acquisition.

An impairment analysis is performed at each reporting period to identify whether events or changes in circumstances, in particular decreases in the quoted prices on active exchanges, indicate that it is more likely than not that digital assets held by the Company are impaired. The fair value of digital assets is determined on a nonrecurring basis in accordance with ASC 820, Fair Value Measurement, based on quoted prices on the active exchange(s) that the Company has determined is its principal market for bitcoin (Level 1 inputs). If the carrying value of the digital asset exceeds the fair value based on the lowest price quoted in the active exchanges during the period, an impairment loss has occurred with respect to those digital assets in the amount equal to the difference between their carrying values and the price determined.

Impairment losses are recognized within Other expense in the consolidated statements of operations in the period in which the impairment is identified. The impaired digital assets are written down to their fair value at the time of impairment and this new cost basis will not be adjusted upward for any subsequent increase in fair value.

Warrants Liability

We classify warrants to purchase shares of our common stock that are contingently puttable or redeemable as liabilities. Such warrants are measured and recognized at fair value and are subject to remeasurement at each balance sheet date. The fair value of our private warrant liabilities is measured using a Black-Scholes ("BSM") option-pricing model whereas the fair value of our public warrants are measured using level 1 inputs. Under the BSM option-pricing model, the fair value is measured using the following assumptions and inputs: exercise price, fair value of the underlying preferred stock, expected term, expected volatility, and risk-free interest rate.

We classify the warrants as a liability on our consolidated balance sheets as of December 31, 2021 and December 31, 2020. The warrant liabilities are measured at fair value at inception and on a recurring basis, with changes in fair value presented within change in fair value of warrant liabilities in the consolidated statement of operations. Prior to Merger, we had warrants exercisable for convertible preferred stock which were exercised at the time of the Merger and no longer considered outstanding. These warrants were measured using the BSM option pricing-model.

Stock-Based Compensation

Stock-based compensation is measured at the grant date based on the fair value of the award and is recognized as expense over the requisite service period, which is generally the vesting period of the respective award. The expense recorded is based on awards ultimately expected to vest and, therefore, is reduced by estimated forfeitures. Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. The Company calculates the fair value of options using the Black-Scholes option pricing model and recognizes expense using the straight-line attribution approach. As of December 31, 2021, the Company has granted stock options and RSUs with service conditions as well as RSUs with performance conditions and market conditions. Awards with performance conditions and no service conditions are expensed when the performance condition is deemed probable of being achieved and is based on the fair value of the award at that time. Unlike a service or performance condition, a market condition is not a vesting condition but is directly factored into the fair-value-based measure of an award. Compensation cost thus is recognized for an award with a market condition provided that the good is delivered or the service is rendered, regardless of when, if ever, the market condition is satisfied.

Advertising Expenses

The Company expenses advertising costs as incurred.

Income Taxes

The Company accounts for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, the Company determines deferred tax assets and liabilities on the basis of the differences between the financial statement and tax bases of assets and liabilities by using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date.

The Company recognizes deferred tax assets to the extent that it believes that these assets are more likely than not to be realized. In making such a determination, the Company considers all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies, and results of recent operations. If the Company determines that it would be able to realize its deferred tax assets in the future in excess of their net recorded amount, the Company would make an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes.

The Company records uncertain tax positions on the basis of a two-step process in which (1) it determines whether it is more likely than not that the tax positions will be sustained on the basis of the technical merits of the position and (2) for those tax positions that meet the more-likely-than-not recognition threshold, the Company recognizes the largest amount of tax benefit that is more than 50 percent likely to be realized upon ultimate settlement with the related tax authority. The Company recognizes accrued interest and penalties, if any, related to unrecognized tax benefits as income tax expense.

Net Loss per Share

Basic and diluted net loss per share attributable to common stockholders is presented in conformity with the two-class method required for participating securities. The Company considers all series of its redeemable convertible preferred stock to be participating securities. Under the two-class method, the net loss attributable to common stockholders is not allocated to the redeemable convertible preferred stock as the holders of its redeemable convertible preferred stock do not have a contractual obligation to share in the Company’s losses. Under the two-class method, net income is attributed to common stockholders and participating securities based on their participation rights. Under the two-class method, basic net loss per share attributable to common stockholders is computed by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period. Diluted earnings per share attributable to common stockholders adjusts basic earnings per share for the potentially dilutive impact of stock options and redeemable convertible preferred stock. As the Company has reported losses for the years presented, all potentially dilutive securities are antidilutive and accordingly, basic net loss per share equals diluted net loss per share.

As of December 31, 2021, the Company no longer had convertible preferred stock. During this period, basic earnings per share was computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. The computation of diluted earnings per share reflected the effect of potentially dilutive securities. As the Company has reported losses for the years presented, all potentially dilutive securities are antidilutive and accordingly, basic net loss per share equals diluted net loss per share.

Leases

The Company leases real estate facilities under non-cancellable and cancellable operating leases with various expiration dates through fiscal year 2030. At the inception of an arrangement, the Company determines whether the

arrangement is or contains a lease based on the unique facts and circumstances present, the existence of an identified asset(s), if any, and the Company’s control over the use of the identified asset(s), if applicable.

The Company adopted ASU 2016-02, Leases (Topic 842) on January 1, 2021. The Company elected the package of practical expedients for transition under which the Company did not reassess its prior conclusions about lease identification, lease classification and initial direct costs. Additionally, the Company elected the hindsight and land easement practical expedients for transition under which conclusions around lease term, impairment and land easements will not be reassessed. The Company did not apply the portfolio approach to its lease agreements.

Operating leases are included in prepaid expenses and other assets and in other liabilities in the accompanying consolidated balance sheets. Operating lease assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Operating lease assets and lease liabilities are recognized at the lease inception date based on the present value of lease payments over the lease term, discounted based on the more readily determinable of (i) the rate implicit in the lease or (ii) the Company’s incremental borrowing rate (which is the estimated rate the Company would be required to pay for a collateralized borrowing equal to the total lease payments over the term of the lease). Because the Company’s operating leases generally do not provide an implicit rate, the Company estimates its incremental borrowing rate based on the information available at lease commencement date utilizing peer company data for borrowings with a similar term.

The Company’s operating lease assets are measured based on the corresponding operating lease liability adjusted for (i) payments made to the lessor at or before the commencement date, (ii) initial direct costs incurred and (iii) tenant incentives under the lease. The Company does not assume renewals or early terminations unless it is reasonably certain to exercise these options at commencement. The Company elected the practical expedient which allows the Company to not allocate consideration between lease and non-lease components. Variable lease payments are recognized in the period in which the obligation for those payments is incurred. In addition, the Company elected the practical expedient such that it does not recognize lease assets or lease liabilities for leases with a term of 12 months or less of all asset classes. Operating lease expense is recognized on a straight-line basis over the lease term.

The Company’s lease agreements generally do not contain any residual guarantees or restrictive covenants.

Accounting Pronouncements

The Company adopted the following accounting standards during the year ended December 31, 2021:

Financial Instruments - Credit Losses

In June 2016, FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”), intended to improve the timing, and enhance the accounting and disclosure, of credit losses on financial assets. The updated guidance applies a new credit loss model (current expected credit losses or "CECL") for determining credit-related impairments for financial instruments measured at amortized cost (including reinsurance recoverables, and premiums receivables) and requires an entity to estimate the credit losses expected over the life of an exposure or pool of exposures. The estimate of expected credit losses should consider historical information, current information, as well as reasonable and supportable forecasts, including estimates of prepayments. The expected credit losses, and subsequent adjustments to such losses, are recorded through an allowance account that is deducted from the amortized cost basis of the financial asset, with the net carrying value of the financial asset presented on the consolidated balance sheets at the amount expected to be collected.

The updated guidance also amends the previous other-than-temporary impairment model for available-for-sale debt securities by requiring the recognition of impairments relating to credit losses through an allowance account and limits the amount of credit loss to the difference between a security’s amortized cost basis and its fair value.

Effective on January 1, 2021, the Company adopted this standard using the modified retrospective transition method. For available-for-sale debt securities, the updated guidance was applied prospectively. For financial instruments measured at amortized cost, the adoption had no impact on the accumulated deficit on the consolidated balance sheets as of January 1, 2021.

Leases

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) (“ASU 2016-02”), as subsequently amended which requires an entity to recognize assets and liabilities arising from a lease for both financing (formerly referred to as capital) and operating leases. ASU 2016-02 also requires new qualitative and quantitative disclosures to help investors and other financial statement users better understand the amount, timing, and uncertainty of cash flows arising from leases. ASU 2016-02 was effective for the Company in its annual reporting period beginning after December 15, 2021, with early adoption permitted. The Company adopted this ASU as of January 1, 2021 using the modified retrospective approach. In addition, the standard allows for certain practical expedients in transition to ASC 842, including the package of practical expedients. The Company elected to utilize the package of practical expedients which allowed the Company to not reassess the following: (i) whether any expired or existing contracts contained leases; (ii) the lease classification for any expired or existing leases; and (iii) the treatment of initial direct costs for any existing leases. ASU 2018-01, Land Easement Practical Expedient for Transition to Topic 840 (“ASU 2018-01”) is effective for the Company upon adopting ASC 842. The Company adopted this ASU as of January 1, 2021 and will not reassess whether any land easements not previously accounted for as leases under Topic 840 meet the definition of a lease.

The adoption of this standard resulted in the recognition of operating lease liabilities and right-of-use assets of $21.2 million and $15.9 million for its various leases with maturity dates through 2030. The Company will depreciate the right of use ("ROU") assets over the respective lease terms accordingly. The difference between the ROU assets and lease liabilities is the unamortized balance of deferred rent, which prior to January 1, 2021, was included as a separate liability within other liabilities. The operating lease expenses are included in other operating expenses in the Company’s consolidated statements of operations. The adoption did not impact beginning accumulated deficit, or prior year consolidated statements of operations and comprehensive loss and statement of cash flows as the Company elected the practical expedient that allows comparative financial statements under ASC 840. The Company included the disclosures required by ASU 2016-02 in the Leases, Commitments and Contingencies footnote.

Income Taxes

ASU 2019-12, Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes, simplifies the various aspects related to accounting for income taxes by removing certain exceptions to the general principles in Topic 740 and clarifies and amends the existing guidance to improve consistent application. The adoption of ASU 2019-12 beginning January 1, 2021 did not have a material impact on the Company's consolidated financial statements and related disclosures.

Reference Rate Reform

In March 2020, FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides optional expedients and exceptions to contract modifications and hedging relationships that reference LIBOR or another reference rate expected to be discontinued. The standard is effective upon issuance through December 31, 2022 and may be applied at the beginning of the interim period that includes March 12, 2020 or any date thereafter. The Company is currently evaluating this new standard and the impact it will have on its consolidated financial statements.

This standard may be elected and applied prospectively over time from March, 2020 through December 31, 2022 as reference rate reform activities occur. The Company is evaluating the method of adoption and impact of the standard on its consolidated financial statements and related disclosures.

Government Assistance

In November 2021, the FASB issued ASU 2021-10, Government Assistance (Topic 832): Disclosures by Business Entities about Government Assistance. This update requires annual disclosures about transactions with a government that are accounted for by applying a grant or contribution accounting model by analogy. This standard is effective for annual periods beginning after December 15, 2021. Early adoption is permitted. The amendments should be applied either (1) prospectively to all transactions within the scope of the amendments that are reflected in financial statements at the date of initial application and new transactions that are entered into after the date of initial application or (2) retrospectively to those transactions. The Company is currently evaluating the impact of these amendments on its consolidated financial statements.

Fair Value Measurement

Cash and Cash Equivalents

The Company’s cash and cash equivalents are demand and money market accounts and other highly liquid investments with an original maturity of three months or less. Demand and money market accounts are at stated values. Fair values for other cash equivalents are classified as Level 1 and are based upon appropriate valuation methodology.

Marketable Securities — Available-for-sale

The Company classifies highly liquid money market funds, U.S. Treasury bonds and certificates of deposit within Level 1 of the fair value hierarchy because they are valued based on quoted market prices in active markets and upon models that take into consideration such market-based factors as recent sales, risk-free yield curves, and prices of similarly rated bonds. Commercial paper, corporate bonds, corporate debt securities, repurchase agreements, and asset backed securities are classified within Level 2 because they are valued using inputs other than quoted prices that are directly or indirectly observable in the market, including readily available pricing sources for the identical underlying security which may not be actively traded.

Public and Private Warrants

At the Closing, Metromile Operating Company acquired the net liabilities from INSU, including warrants exercisable for common stock. The Company estimated the fair value of warrants exercisable for common stock measured at fair value on a recurring basis at the respective dates using the public trading price, for the Public warrants, and the Black-Scholes option valuation model, for the Private placement warrants (together with the public warrants, the “Warrants”), respectively. The Black-Scholes option valuation model inputs are based on the estimated fair value of the underlying common stock at the valuation measurement date, the remaining contractual term of the warrant, the risk-free interest rates, the expected dividends, and the expected volatility of the price of the Company’s underlying stock. These estimates, especially the expected volatility, are highly judgmental and could differ materially in the future.

The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. The Company considers its Public warrants to be Level 1 liabilities as it uses publicly and readily available information to measure the fair value of the warrants. For the Company's Private placement warrants, while the Company believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date and as such are classified as Level 2 liabilities.