Basis of Presentation and Summary of Significant Accounting Policies | Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation T he accompanying unaudited condensed financial statements have been prepared on a consistent basis with the annual financial statements and in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and the requirements of the Securities and Exchange Commission (“SEC”) for interim reporting . Pursuant to these SEC rules and regulations, the Company has condensed or omitted certain financial information and disclosures normally included in annual financial statements prepared in accordance with GAAP. In the opinion of management, the interim financial statements reflect all adjustments, which include normal recurring adjustments, considered necessary for a fair statement of the interim periods. The interim results presented herein are not necessarily indicative of the results of operations to be expected for the full year ending December 31, 2020 or for any other interim period. The accompanying unaudited condensed financial statements and related disclosures should be read in conjunction with the financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019, as filed with the SEC on February 25, 2020. Use of Estimates Management is required to make certain estimates and assumptions in order to prepare financial statements in conformity with GAAP. Such estimates and assumptions affect the reported financial statements. The Company’s most significant estimates relate to net revenues, allowance for doubtful accounts, fair value measurements, goodwill and long-lived asset valuations and impairment assessments, inventory valuations, income tax valuations, stock-based compensation and royalty obligations, among others. Management bases estimates on historical experience and on assumptions that management believes are reasonable. The Company’s actual results could differ materially from those estimates. Additionally, the full impact of the COVID-19 outbreak is unknown and cannot be reasonably estimated. However, where possible, management has made appropriate accounting estimates with respect to certain accounting matters, which include the fair value of royalty obligations, allowance for doubtful accounts, inventory valuation and impairment assessments of goodwill and other long-lived assets, based on the facts and circumstances available as of the reporting date. The Company’s future assessment of the magnitude and duration of the COVID-19 outbreak, as well as other factors, could result in material impacts to the Company’s financial statements in future reporting periods. Risks and Uncertainties In 2013, Evolus and Daewoong Pharmaceuticals Co., Ltd. (“Daewoong”) entered into an agreement (the “Daewoong Agreement”), pursuant to which, the Company has an exclusive distribution license to Jeuveau ® from Daewoong for aesthetic indications in the United States, European Union, Canada, Australia, Russia, Commonwealth of Independent States, and South Africa, as well as co-exclusive distribution rights with Daewoong in Japan. Jeuveau ® is manufactured by Daewoong in a facility in South Korea. The Company also has the option to negotiate first with Daewoong to secure a distribution license for any product that Daewoong directly or indirectly develops or commercializes that is classified as an injectable botulinum toxin (other than Jeuveau ® ) in a territory covered by the Daewoong Agreement. The Company relies on Daewoong, its exclusive and sole supplier, to manufacture Jeuveau ® . Any termination or loss of significant rights, including exclusivity, under the Daewoong Agreement would materially and adversely affect the Company’s commercialization of Jeuveau ® . The Daewoong Agreement, and Daewoong’s rights relating to Jeuveau ® , are subject to litigation. See Note 7 . Commitments and Contingencies for additional information regarding such litigation. The Company commercially launched Jeuveau ® in the United States in May 2019 and in Canada through a distribution partner in October 2019 and, as such, has a limited history of sales. If any previously granted approval is retracted or the Company is denied approval or approval is delayed by any other regulators, it may have a material adverse impact on the Company’s business and its financial statements. The Company is subject to risks common to companies in the pharmaceutical industry including, but not limited to, dependency on the commercial success of Jeuveau ® , the Company’s sole commercial product, significant competition within the medical aesthetics industry, its ability to maintain regulatory approval of Jeuveau ® , the need for additional financing to achieve its goals, third party litigation and challenges to its intellectual property, uncertainty of broad adoption of its product by physicians and patients, its ability to in-license, acquire or develop additional product candidates and to obtain the necessary approvals for those product candidates, and the need to scale manufacturing capabilities over time. The recent COVID-19 outbreak and restrictions intended to slow the spread of COVID-19, including quarantines, government-mandated actions, stay-at-home orders and other restrictions, have adversely affected the Company’s business in a number of ways, which have resulted, and may continue to result, in a period of business disruption and in reduced sales and operations. In addition, any disruption and volatility in the global capital markets may increase the Company’s cost of capital and adversely affect its ability to access financing when and on terms that we desire. Any of these events could have a material adverse effect on the Company’s business, financial condition, results of operations and cash flows. Segment Reporting Operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by the chief operating decision-maker. The Company has determined that it operates in a single operating and reportable segment. The Company’s chief operating decision maker is its Chief Executive Officer who manages operations and reviews the financial information as a single operating segment for purposes of allocating resources and evaluating its financial performance. Cash and Cash Equivalents Cash and cash equivalents consist of cash and highly liquid investments with remaining maturities at purchase of three months or less that can be liquidated without prior notice or penalty. Cash and cash equivalents may include deposits, money market funds and debt securities. Amounts receivable from credit card issuers are typically converted to cash within two to four days of the original sales transaction and are considered to be cash equivalents. The Company places its cash and cash equivalents with high credit quality financial institutions. At times, such investments may be in excess of the Federal Deposit Insurance Corporation (“FDIC”) limit. Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of cash deposits. Short-Term Investments Short-term investments as of March 31, 2020 consisted of available-for-sale U.S. Treasury securities with original maturities greater than three months and remaining maturities of less than twelve months. These investments are recorded at fair value based on quoted prices in active markets, with unrealized gains and losses reported in other comprehensive (loss) gain in the Company’s condensed statements of operations and comprehensive loss. Purchase premiums and discounts are recognized in interest expense using the effective interest method over the terms of the securities. Realized gains and losses and declines in fair value that are deemed to be other than temporary are reflected in the condensed statements of operations and comprehensive loss using the specific-identification method. The Company periodically reviews all available-for-sale securities for other than temporary declines in fair value below the cost basis whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. The Company also evaluates whether it has plans or is required to sell short-term investments before recovery of their amortized cost bases. To date, the Company has not identified any other than temporary declines in fair value of its short-term investments. Inventories Inventories consist of finished goods held for sale and distribution. Cost is determined using the first‑in, first‑out method with prioritization of the items with the earliest expiration dates. Inventory valuation reserves are established based on a number of factors including, but not limited to, finished goods not meeting product specifications, product excess and obsolescence, or application of the lower of cost or net realizable value concepts. The determination of events requiring the establishment of inventory valuation reserves, together with the calculation of the amount of such reserves may require judgment. No material inventory valuation reserves have been recorded for the periods presented. Adverse changes in assumptions utilized in the Company’s inventory reserve calculations could result in an increase to its inventory valuation reserves. Fair Value of Financial Instruments Fair value is defined as the exchange price that would be received for an asset or an exit price paid to transfer a liability in an orderly transaction between market participants in a principal market on the measurement date. The fair value hierarchy defines a three-tiered valuation hierarchy for disclosure of fair value measurement is classified and disclosed by the Company in one of the three categories as follows: • Level 1—Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities; • Level 2—Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities in active markets; quoted prices in markets that are not active; or other inputs that are observable, either directly or indirectly, or can be corroborated by observable market data for substantially the full term of the asset or liability; and • Level 3—Prices or valuation techniques that require inputs that are unobservable that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. The categorization of a financial instrument within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Goodwill Goodwill represents the excess of the purchase price over the fair value of the net tangible and intangible assets acquired in a business combination. The Company reviews goodwill for impairment annually and whenever events or changes in circumstances indicate the carrying amount of goodwill may not be recoverable. The Company performs an annual qualitative assessment of its goodwill in the fourth quarter of each calendar year to determine if any events or circumstances exist, such as an adverse change in business climate or a decline in the overall industry demand, that would indicate that it would more likely than not reduce the fair value of a reporting unit below its carrying amount, including goodwill. If events or circumstances do not indicate that the fair value of a reporting unit is below its carrying amount, then goodwill is not considered to be impaired and no further testing is required. If further testing is required, the Company performs a two-step process. The first step involves comparing the fair value of the Company’s reporting unit to its carrying value, including goodwill. If the carrying value of the reporting unit exceeds its fair value, the second step of the test is performed by comparing the carrying value of the goodwill in the reporting unit to its implied fair value. An impairment charge is recognized for the excess of the carrying value of goodwill over its implied fair value. For the purpose of impairment testing, the Company has determined that it has one reporting unit. There was no impairment of goodwill for any of the periods presented. Intangible Assets Upon FDA approval of Jeuveau ® in February 2019, the in-process research and development (“IPR&D”) related to Jeuveau ® was evaluated as completed and reclassified to a definite-lived distribution right intangible asset, which is amortized over the period the asset is expected to contribute to the future cash flows of the Company. The Company determined the pattern of this intangible asset’s future cash flows could not be readily determined with a high level of precision. As a result, the distribution right intangible asset is being amortized on a straight-line basis over the estimated useful life of 20 years. The Company capitalizes certain internal-use software costs associated with the development of its mobile and web-based customer platforms. These costs include personnel expenses and external costs that are directly associated with the software projects. These costs are included as intangible assets in the accompanying condensed balance sheets. The capitalized internal-use software costs are amortized on a straight-line basis over the estimated useful life of two years upon being placed in service. The Company reviews long-term and identifiable definite-lived intangible assets or asset groups for impairment when events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. If the sum of the expected future undiscounted cash flows is less than the carrying amount of the asset or an asset group, further impairment analysis is performed. An impairment loss is measured as the amount by which the carrying amount of the asset or asset groups exceeds the fair value for assets to be held and used or fair value less cost to sell for assets to be disposed of. The Company also reviews the useful lives of its assets periodically to determine whether events and circumstances warrant a revision to the remaining useful life. Changes in the useful life are adjusted prospectively by revising the remaining period over which the asset is amortized. There was no material impairment of long-lived assets for any periods presented. Leases In accordance with Accounting Standards Codification 842, Leases (“ASC 842”), at the inception of a contractual arrangement, the Company determines whether the contract contains a lease by assessing whether there is an identified asset and whether the contract conveys the right to control the use of the identified asset in exchange for consideration over a period of time. If both criteria are met, upon lease commencement, the Company records a lease liability which represents the Company’s obligation to make lease payments arising from the lease, and a corresponding right-of-use (“ROU”) asset which represents the Company’s right to use an underlying asset during the lease term. Operating lease assets and liabilities are included in ROU assets, current portion of operating lease liabilities and noncurrent operating lease liabilities in the accompanying condensed balance sheets. Operating lease ROU assets and lease liabilities are initially recognized based on the present value of the future minimum lease payments over the lease term at commencement date calculated using the Company’s incremental borrowing rate applicable to the underlying asset unless the implicit rate is readily determinable. Operating lease ROU assets also include any lease payments made at or before lease commencement and exclude any lease incentives received, if any. The Company determines the lease term as the noncancelable period of the lease and may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise such options. The Company’s leases do not contain any residual value guarantees. Leases with a term of 12 months or less are not recognized on the condensed balance sheets. For operating leases, the Company recognized rent expense on a straight-line basis over the lease term. There were no significant finance leases as of March 31, 2020 . Research and Development Expenses Research and development costs are expensed as incurred. Research and development expenses include personnel-related costs including stock based compensation, costs associated with pre-clinical and clinical development activities, costs associated with and costs for prototype products that are manufactured prior to market approval for that prototype product, internal and external costs associated with the Company’s regulatory compliance and quality assurance functions, including the costs of outside consultants and contractors that assist in the process of submitting and maintaining regulatory filings, and overhead costs, including allocated facility related expenses. Contingent Royalty Obligation Payable to the Evolus Founders The Company determines the fair value of the contingent royalty obligation payable at each reporting period end based on Level 3 inputs using a discounted cash flows method. Changes in the fair value of the contingent royalty obligation payable are determined at each reporting period end and recorded in operating expenses in the accompanying condensed statements of operations and comprehensive loss and as a liability in the condensed balance sheets. Contingent Promissory Note Payable to Evolus Founders On February 12, 2018, the Company recognized a contingent promissory note payable at present value using a discount rate for similar rated debt securities based on an estimated date that the Company believed the contingent promissory note will mature. Discount amortization related to the contingent promissory note is recorded in interest expense in the condensed statements of operations and comprehensive loss with a corresponding increase to the non-current liabilities in the condensed balance sheets. Long-Term Debt Long-term debt represents the debt balance with Oxford Finance (“Oxford”), net of debt issuance costs. Debt issuance costs represent legal, lender and consulting costs or fees associated with debt financing. Debt discounts and issuance costs are allocated pro rata between the funded and unfunded portions of the debt and are amortized into interest expense over the term of the debt. Revenue Recognition The Company applies Accounting Standards Codification 606, Revenue from Contracts with Customers (“ASC 606”), to account for revenue generated since the commercial launch of Jeuveau ® in May 2019. The Company recognizes revenue when control of the promised goods or services is transferred to its customers, in an amount that reflects the consideration to which the Company expects to be entitled in exchange for the goods or services. In order to achieve that core principle, a five-step approach is applied: (1) identify the contract with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue allocated to each performance obligation when the Company satisfies the performance obligation. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the unit of account for revenue recognition. General The Company currently generates product revenue from the sale of Jeuveau ® in the United States and service revenue from the sale of Jeuveau ® through a distribution partner in Canada. For product revenue, the Company recognizes revenue when control of the promised goods under a contract is transferred to a customer, in an amount that reflects the consideration the Company expects to receive in exchange for those goods as specified in the customer contract. The transfer of control occurs upon receipt of the goods by the customer since that is when the customer has obtained control of the goods’ economic benefits. The Company does not provide any service-type warranties and does not accept product returns except under limited circumstances such as damages in transit or ineffective product. The Company also excludes any amounts related to taxes assessed by governmental authorities from revenue measurement. Shipping and handling costs associated with outbound product freight are accounted for as fulfillment costs and are included in selling, general and marketing expenses in the accompanying condensed statements of operations and comprehensive loss. For service revenue, the Company evaluated the arrangement with the distribution partner in Canada and determined that it acts as an agent in the distribution of Jeuveau ® in Canada as it does not control the product before control is transferred to a customer. The indicators of which party exercises control include primary responsibility over performance obligations, inventory risk before the good or service is transferred and discretion in establishing the price. Accordingly, the Company records the sale as service revenue on a net basis. Revenue from services is recognized in the period the service is performed for the amount of consideration expected to be received. There were no service revenues for the three months ended March 31, 2020 . Disaggregation of Revenue The Company’s disaggregation of revenue is consistent with its operating segment as disclosed above. Gross-to-Net Revenue Adjustments The Company provides customers with trade and volume discounts and prompt pay discounts that are directly reflected in the invoice price. Revenues are recorded net of sales-related adjustments, wherever applicable, for rebates and coupon programs. Accrued rebate and coupon balances are recorded in accrued expenses on the accompanying condensed balance sheets. • Volume-based Rebates - Volume-based rebates are contractually offered to certain customers. The rebates payable to each customer are determined based on the contract and quarterly purchase volumes. • Coupons - The Company issued customers coupons redeemable into gift cards funded by the Company for the benefit of patients. The coupons are accounted for as variable consideration. The Company estimates the coupon redemption rates based on historical data and future expectations. The coupons are accrued based on estimated redemption rates and the volume of products purchased and are recorded as a reduction to revenues on product delivery. As of March 31, 2020 and December 31, 2019 , the accrued volume-based rebate and coupon liability was $2,479 and $1,709 , respectively. During the three months ended March 31, 2020 , provisions for rebate and coupon programs were $10,213 , which were offset by related payments of $9,443 . Contract balances A contract with a customer states the terms of the sale, including the description, quantity and price of each product purchased. Amounts are recorded as accounts receivable when the Company’s right to consideration becomes unconditional. As payment terms are short-term, the Company does not have any significant financing components in customer contracts given the expected time between transfer of the promised products and the payment of the associated consideration is less than one year. As of March 31, 2020 and December 31, 2019 , all amounts included in accounts receivable, net on the accompanying condensed balance sheets are related to contracts with customers. The Company did not have any contract assets nor unbilled receivables as of March 31, 2020 or December 31, 2019 . Sales commissions are included in selling, general and administrative expenses when incurred. Contract liabilities reflect estimated amounts that the Company is obligated to pay to customers or patients under the rebate and coupon programs. The Company’s contract liabilities are included in accounts payable and accrued expenses in the accompanying condensed balance sheets. During the three months ended March 31, 2020 , the Company did not recognize any revenue related to changes in transaction prices regarding its contracts with customers and did not recognize any material changes in revenue related to amounts included in contract liabilities at the beginning of the period. Collectability Accounts receivable are recorded at the invoiced amount and do not bear interest. At the time of contract inception or new customer account set-up, the Company performs a collectability assessment of the customer’s creditworthiness. The Company assesses the probability that the Company will collect the entitled consideration in exchange for the goods sold, by considering the customer’s ability and intention to pay when consideration is due. On a recurring basis, the Company estimates the amount of receivables considered uncollectable to reflect an allowance for doubtful accounts. The Company writes off accounts receivable balances when it is determined that there is no possibility of collection. As of March 31, 2020 and December 31, 2019 , allowance for doubtful accounts was $2,823 and $387 , respectively. For the three months ended March 31, 2020 , provision for bad debts was $2,607 and write-off amount was $171 . Practical Expedients The Company expenses sales commissions when incurred as the amortization period is one year or less. These costs are recorded within selling, general and administrative expenses in the accompanying condensed statements of operations and comprehensive loss. The Company does not adjust the amount of promised consideration for the effects of the time value of money for contracts in which the anticipated period between when the Company transfers the goods or services to the customer and when the customer pays within one year. Stock-Based Compensation The Company recognizes stock-based compensation expense for employees, consultants and members of the Board of Directors based on the fair value at the date of grant. The Company uses the Black-Scholes option pricing model to value stock option grants. The Black-Scholes option pricing model requires the input of subjective assumptions, including the expected volatility of the Company’s common stock, expected risk-free interest rate, and the option’s expected life. The fair value of the Company’s restricted stock units (“RSUs”) is based on the fair value on the grant date of the Company’s common stock. The Company also evaluates the impact of modifications made to the original terms of equity awards when they occur. The fair value of equity awards that are expected to vest is amortized on a straight-line basis over the requisite service period. Stock-based compensation expense is recognized net of actual forfeitures when they occur, as an increase to additional paid-in capital in the condensed balance sheets and in the selling, general and administrative or research and development expenses in the condensed statements of operations and comprehensive loss. Income Taxes The Company applies an estimated annual effective tax rate (“ETR”) approach for calculating a tax provision or benefit for interim periods, as required under GAAP. The Company recorded a tax provision of $256 and a tax benefit of $14,523 for the three months ended March 31, 2020 and 2019 , respectively. The Company’s ETR differs from the U.S. federal statutory tax rate of 21% for the three months ended March 31, 2020 and 2019 , primarily as a result of the impact of a valuation allowance on its deferred tax assets and state minimum taxes. The tax benefit recorded for the three months ended March 31, 2019 was primarily a result of the reduction of the valuation allowance recorded against the Company’s deferred tax assets. A valuation allowance is recorded against deferred tax assets to reduce the net carrying value when it is more likely than not that some portion or all of a deferred tax asset will not be realized. In making such a determination, management considers all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, and ongoing prudent and feasible tax planning strategies in assessing the amount of the valuation allowance. When the Company establishes or reduces the valuation allowance against its deferred tax assets, its provision for income taxes will increase or decrease, respectively, in the period such determination is made. As of each reporting date, the Company considers evidence, both positive and negative, that could affect its view of the future realization of deferred tax assets. Upon FDA approval of Jeuveau ® in February 2019, the Company’s IPR&D intangible asset was reclassified to a definite-lived distribution right intangible asset. As a result, management determined that it was more likely than not that certain deferred tax assets became realizable due to the future reversals of the deferred tax liability associated with such intangible asset. Accordingly, the Company released $14,402 of its valuation allowance as a discrete item upon FDA approval in February 2019. Additionally, the Company recognizes the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities based on the technical merits of the position. The tax benefit recognized in the financial statements for a particular tax position is based on the largest benefit that is more likely than not to be realized upon settlement. Accordingly, the Company establishes reserves for uncertain tax positions. On March 27, 2020, the United States enacted the Coronavirus Aid, Relief and Economic Security Act (CARES Act). The Cares Act is an emergency economic stimulus package that includes spending and tax breaks to strengthen the United States economy and fund a nationwide effort to curtail the effect of COVID-19. While the CARES Act provides sweeping tax changes in response to the COVID-19 pandemic, some of the more significant provisions which are expected to impact the Company’s financial statements include removal of certain limitations on utilization of net operating losses, increasing the loss carryback period for certain losses to five years, and increasing the ability to deduct interest expense, as well as amending certain provisions of the previously enacted Tax Cuts and Jobs Act. Due to the recent enactment of the CARES Act, the Company is unable to quantify the impact, if any, that the CARES Act will have on its financial position, results of operations or cash flows. Net Loss Per Share Basic net loss per share is computed by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period including contingently issuable shares. Diluted earnings per share is based on the treasury stock method and includes the effect from potential issuance of ordinary shares, such as shares issuable pursuant to the exercise of stock options and the vesting of restricted stock units. Because the impact of the options and non-vested RSUs are anti-dilutive during periods of net loss, there was no difference between the weighted-average number of shares used to calculate basic and diluted net loss per common share for the periods presented. For the three months ended March 31, 2020 and 2019 , excluded from the dilutive net loss per share computation were stock options of 4,962,535 and 3,867,254 , respectively, and non-vested RSUs of 480,069 and 256,870 , respectively, because their inclusion would have been anti-dilutive. Although these securities were anti-dilutive for these periods, they could be dilutive in future periods. Recently Adopted Accounting Pronouncements In August 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2018-15, Intangibles-Goodwill and Other-Internal-Use Software: Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract. ASU 2018-15 requires implementation costs incurred by customers in cloud computing arrangements (i.e., hosting arrangements) to be capitalized under the same premises of authoritative guidance for internal-use software, and deferred over the noncancelable term of the cloud computing arrangements plus any option renewal periods that are reasonably certain to be exercised by the customer or for which the exercise is controlled by the service provider. The guidance is effective for interim and annual |