Summary of Significant Accounting Policies | Summary of Significant Accounting Policies Basis of Presentation and Consolidation The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP, and the applicable rules and regulations of the Securities and Exchange Commission, or SEC. The consolidated financial statements include the Company’s accounts and those of its wholly owned subsidiaries as of December 31, 2018 as follows: Subsidiary Incorporation/Acquisition Date Establishment Labs, S.A. (Costa Rica) January 18, 2004 Motiva USA, LLC (USA) February 20, 2014 JAMM Technologies, Inc. (USA) October 27, 2015 Establishment Labs Produtos par Saude Ltda (Brazil) January 4, 2016 European Distribution Center Motiva BVBA (Belgium) March 4, 2016 Motiva Implants France SAS (France) September 12, 2016 JEN-Vault AG (Switzerland) November 22, 2016 Motiva Nordica AB (Sweden) November 2, 2017 Motiva Implants UK Limited July 31, 2018 Motiva Italy S.R.L July 31, 2018 All intercompany accounts and transactions have been eliminated in consolidation. Segments The chief operating decision maker for the Company is the Chief Executive Officer. The Chief Executive Officer reviews financial information presented on a consolidated basis, accompanied by information about revenue by geographic region, for purposes of allocating resources and evaluating financial performance. The Company has one business activity and there are no segment managers who are held accountable for operations, operating results or plans for levels or components below the consolidated unit level. Accordingly, the Company has determined that it has a single reportable and operating segment structure. The Company and its Chief Executive Officer evaluate performance based primarily on revenue in the geographic regions in which the Company operates. Geographic Concentrations The Company derives all of its revenues from sales to customers in Europe, the Middle East, Latin America, and Asia, and has not yet received approval to sell its products in the United States. For the year ended December 31, 2018 , Brazil accounted for 15.7% of consolidated revenue and no other individual country exceeded 10% of consolidated revenue, on a ship-to destination basis. For the year ended December 31, 2017 , no individual country exceeded 10% of consolidated revenue, on a ship-to destination basis. The Company’s long-lived assets located in Costa Rica represented the majority of the total long-lived assets as of December 31, 2018 and 2017 . Use of Estimates The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Significant accounting estimates and management judgments reflected in the consolidated financial statements include items such as accounts receivable valuation and allowances, inventory valuation and allowances, valuation of acquired intangible assets, valuation of contingent consideration, valuation of derivatives, estimation of assets’ useful lives and valuation allowances of deferred income tax assets. Estimates are based on historical experience, where applicable, and other assumptions believed to be reasonable by management. Actual results may differ from those estimates under different assumptions or conditions. Concentration of Credit Risk and Other Risks and Uncertainties Financial instruments that potentially subject the Company to a concentration of credit risk consist principally of cash, restricted cash and accounts receivable. The majority of the Company’s cash is held at one financial institution in the United States. The Company has not experienced any losses on its deposits of cash. All of the Company’s revenue has been derived from sales of its products in international markets, principally Europe, Middle East, Latin America, and Asia. In the international markets in which the Company participates, the Company uses a combination of distributors and makes direct sales to customers. The Company performs ongoing credit evaluations of its distributors and customers, does not require collateral, and maintains allowances for potential credit losses on customer accounts when deemed necessary. During the year ended December 31, 2018 and 2017 , no customers accounted for more than 10% of the Company’s revenue. No customers accounted for more than 10% of the Company’s accounts receivable balance as of December 31, 2018 and 2017 . Substantially all of the Company’s revenues are derived from the sale of Motiva Implants. The Company relies on NuSil Technology, LLC, or NuSil, as the sole supplier of medical-grade silicone used in Motiva Implants as well as other products that are manufactured under contract to other customers. During the year ended December 31, 2018 and 2017 , the Company had purchases of $14.8 million , or 63.4% of total purchases, and $10.2 million , or 40.6% of total purchases, respectively, from Nusil. As of December 31, 2018 and 2017 , we had an outstanding balance owed to this vendor of $0.8 million and $0.7 million , respectively. The Company’s future results of operations involve a number of risks and uncertainties. Factors that could affect the Company’s future operating results and cause actual results to vary materially from expectations include, but are not limited to, uncertainty of regulatory approval of the Company’s current and potential future products, uncertainty of market acceptance of the Company’s products, competition from substitute products and larger companies, securing and protecting proprietary technology, strategic relationships and dependence on key individuals and sole source suppliers. Products developed by the Company require clearances from the FDA or other international regulatory agencies prior to commercial sales. There can be no assurance that the products will receive the necessary clearances. If the Company was denied clearance, clearance was delayed, or the Company was unable to maintain its existing clearances, these developments could have a material adverse impact on the Company. Cash The Company’s cash consists of cash maintained in checking and interest-bearing accounts. The Company accounts for financial instruments with original maturities of three months or less at the date of purchase as cash equivalents. The Company held no cash equivalents as of December 31, 2018 and 2017 . Restricted Cash As of December 31, 2017, the restricted cash balance represented a certificate of deposit collateralizing payment of charges related to the Company's corporate credit card. As of December 31, 2018, the funds were included in “Prepaid expenses and other current assets” as the Company anticipates the restriction to be lifted in 2019. Accounts Receivable and Allowance for Doubtful Accounts Accounts receivable is stated at invoice value less estimated allowances for returns and doubtful accounts. The Company continually monitors customer payments and maintains an allowance for estimated losses resulting from customers’ inability to make required payments. In evaluating the Company’s ability to collect outstanding receivable balances, the Company considers various factors including the age of the balance, the creditworthiness of the customer, which is assessed based on ongoing credit evaluations and payment history, and the customer’s current financial condition. In cases where there are circumstances that may impair a specific customer’s ability to meet its financial obligations, an allowance is recorded against amounts due, which reduces the net recognized receivable to the amount reasonably believed to be collectible. Inventory and Cost of Revenue Inventory is stated at the lower of cost to purchase or manufacture the inventory or the net realizable value of such inventory. Cost is determined using the standard cost method which approximates actual costs using the first-in, first-out basis. The Company regularly reviews inventory quantities considering actual losses, projected future demand, and remaining shelf life to record a provision for excess and slow-moving inventory. As of December 31, 2018 , an allowance of $0.2 million was recorded for inventory obsolescence. No inventory allowance has been recorded as of December 31, 2017 . The Company recognizes the cost of inventory transferred to the customer in cost of revenue when revenue is recognized. Shipping and Handling Costs Shipping and handling costs are expensed as incurred and are included in selling, general and administrative, or SG&A, expenses. For the year ended December 31, 2018 and 2017 , shipping and handling costs were $2.0 million and $1.3 million , respectively. Revenue Recognition The Company recognizes revenue related to sales of products to distributors or directly to customers in markets where it has regulatory approval, net of trade discounts and allowances. The Company recognizes revenue in accordance with Accounting Standards Codification, or ASC, 605 Revenue Recognition when all of the following criteria are met: ▪ persuasive evidence of an arrangement exists; ▪ the sales price is fixed or determinable; ▪ collection of the relevant receivable is probable at the time of sale; and ▪ delivery has occurred or services have been rendered. The Company recognizes revenue related to the sales of products to distributors at the time of shipment of the product, which represents the point in time when the customer has taken ownership and assumed the risk of loss and the required revenue recognition criteria are satisfied. The Company’s distributors are obligated to pay within specified terms regardless of when, or if, they sell the products. The Company’s contracts with distributors typically do not contain right of return or price protection and have no post-delivery obligations. Appropriate reserves are established for anticipated sales returns based on historical experience, recent gross sales and any notification of pending returns. The Company recognizes revenue when title to the product and risk of loss transfer to customers, provided there are no remaining performance obligations required of the Company or any written matters requiring customer acceptance. The Company allows for the return of product from direct customers in certain regions within fifteen days after the original sale and records estimated sales returns as a reduction of sales in the same period revenue is recognized. Sales return provisions are calculated based upon historical experience with actual returns. Actual sales returns in any future period are inherently uncertain and thus may differ from the estimates. If actual sales returns differ significantly from the estimates, an adjustment to revenue in the current or subsequent period is recorded. As of December 31, 2018 , an allowance of $52,000 was recorded for product returns. Prior to 2018, returns of products have been de minimis and accordingly no allowance for returns was recorded as of December 31, 2017 . A portion of the Company’s revenue is generated from the sale of consigned inventory maintained at physician, hospital, and clinic locations. For these products, revenue is recognized at the time the Company is notified by the consignee that the product has been implanted, not when the consigned products are delivered to the consignee’s warehouse. The Company has a limited warranty to distributors for the shelf life of the product, which is five years from the time of manufacture. Estimated warranty obligations are recorded at the time of sale. The Company also offers a warranty to patients in the event of rupture and a replacement program for capsular contracture events provided certain registration requirements are met. Revenue for extended warranties are recognized ratably over the term of the agreement. To date, these warranty and program costs have been de minimis. The Company will continue to evaluate the warranty reserve policies for adequacy considering claims history. Deferred revenue primarily consists of payments received in advance of meeting revenue recognition criteria. The Company has received payments from distributors to provide distribution exclusivity within a geographic area and recognizes deferred revenue on a ratable basis over the term of such contractual distribution relationship. Additionally, the Company has received payments from customers in direct markets prior to surgical implantation, and recognizes deferred revenue at the time the Company is notified by the customer that the product has been implanted. For all arrangements, any revenue that has been deferred and is expected to be recognized beyond one year is classified as long-term deferred revenue and included in “Other liabilities, long term” on the consolidated balance sheets. Research and Development Costs related to research and development, or R&D, activities are expensed as incurred. R&D costs primarily include personnel costs, materials, clinical expenses, regulatory expenses, product development, consulting services, outside research activities, all of which are directly related to research and development activities. The Company estimates FDA clinical trial expenses based on the services performed, pursuant to contracts with research institutions and clinical research organizations that conduct and manage clinical trials on its behalf. In accruing service fees, the Company estimates the time period over which services will be performed and the level of patient enrollment and activity expended in each period. If the actual timing of the performance of services or the level of effort varies from the estimate, the Company will adjust the accrual accordingly. Selling, General and Administrative Expenses SG&A expenses include sales and marketing costs, payroll and related benefit costs, insurance expenses, shipping and handling costs, legal and professional fees and administrative overhead. Property and Equipment Property and equipment are stated at cost less accumulated depreciation and amortization. Depreciation of property and equipment is computed using the straight-line method over the assets’ estimated useful lives of five to ten years. Leasehold improvements are amortized on a straight-line basis over the shorter of the estimated useful life of the asset or the remaining lease term after factoring expected renewal periods. Upon retirement or disposal of assets, the costs and related accumulated depreciation are eliminated from the accounts and any gain or loss is recognized in operations. Maintenance and repairs are expensed as incurred. Substantially all of the Company’s manufacturing operations and related property and equipment is located in Costa Rica. Goodwill and Intangible Assets The Company records the excess of the acquisition purchase price over the net fair value of the tangible and identifiable intangible assets acquired and liabilities assumed as goodwill. In accordance with ASC 350, Intangibles - Goodwill and Other, the Company tests goodwill for impairment annually during the fourth quarter of each year and whenever events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. In connection with the annual impairment test for goodwill, the Company elected the option to perform a qualitative assessment to determine whether it is more likely than not that the fair value of the reporting unit is less than its carrying amount. If the Company determines that it was more likely than not that the fair value of the reporting unit is less than its carrying amount, then the quantitative impairment test is performed. Consistent with the Company's assessment that it has only one reporting segment, the Company has determined that it has only one reporting unit and, if a quantitative assessment is needed, tests goodwill for impairment at the entity level using the two-step process required by ASC 350. In the first step, the Company compares the carrying amount of the reporting unit to the fair value of the enterprise. If the fair value of the enterprise exceeds the carrying value, goodwill is not considered impaired and no further testing is required. If the carrying value of the enterprise exceeds the fair value, goodwill is potentially impaired, and the second step of the impairment test must be performed. In the second step, the Company compares the implied fair value of the goodwill, as defined by ASC 350, to its carrying amount to determine the impairment loss, if any. The Company capitalizes certain costs related to intangible assets, such as patents and trademarks and records purchased intangible assets at their respective estimated fair values at the date of acquisition. Purchased finite-lived intangible assets are being amortized using the straight-line method over their remaining estimated useful lives, which range from two to fifteen years. The Company evaluates the remaining useful lives of intangible assets on a periodic basis to determine whether events or circumstances warrant a revision to the remaining estimated amortization period. The Company tests indefinite-lived intangible assets for impairment on at least an annual basis and whenever circumstances suggest the assets may be impaired. If indicators of impairment are present, the Company evaluates the carrying value of the intangible assets in relation to estimates of future undiscounted cash flows. The Company also evaluates the remaining useful life of an indefinite-lived intangible asset to determine whether events and circumstances continue to support an indefinite useful life. During the years ended December 31, 2018 and 2017 , there has been no impairment of goodwill or intangible assets based on the qualitative assessments performed by the Company. Long-Lived Assets The Company reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset might not be recoverable. When such an event occurs, management determines whether there has been impairment by comparing the anticipated undiscounted future net cash flows to the related asset group’s carrying value. If an asset is considered impaired, the asset is written down to fair value, which is determined based either on discounted cash flows or appraised value, depending on the nature of the asset. There were no impairment charges, or changes in estimated useful lives recorded d uring the years ended December 31, 2018 and 2017 . Debt and Embedded Derivatives The Company applies the accounting standards for derivatives and hedging and for distinguishing liabilities from equity when accounting for hybrid contracts. The Company accounts for convertible debt instruments when the Company has determined that the embedded conversion options should not be bifurcated from their host instruments in accordance with ASC 470-20 Debt with Conversion and Other Options. The Company records, when necessary, discounts to notes payable for the intrinsic value of conversion and other options embedded in debt instruments as a beneficial conversion option based upon the differences between the fair value of the underlying shares at the commitment date of the note transaction and the effective conversion price embedded in the note (see Note 6). The Company uses option pricing valuation models to determine the fair value of embedded derivatives and records any change in fair value as a component of other income or expense in the consolidated statements of operations (see Note 5). Debt Issuance Costs and Debt Discounts Costs incurred in connection with the issuance of new debt are capitalized. Capitalizable debt issuance costs paid to third parties and debt discounts, net of amortization, are recorded as a reduction to the long-term debt balance on the consolidated balance sheets. Amortization expense on capitalized debt issuance costs and debt discounts related to loans are calculated using the effective interest method over the term of the loan commitment and is recorded as interest expense in the condensed consolidated statements of operations. Income Taxes The Company records income taxes using 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 recognized in the Company’s consolidated financial statements or income tax returns. In estimating future tax consequences, expected future events, enactments or changes in the tax law or rates are considered. Valuation allowances are provided when necessary to reduce deferred tax assets to the amount expected to be realized. The Company operates in various tax jurisdictions and is subject to audit by various tax authorities. The Company records uncertain tax positions based on a two-step process whereby (1) a determination is made as to whether it is more likely than not that the tax positions will be sustained based on 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 greater than 50% likely to be realized upon ultimate settlement with the related tax authority. The Company’s policy is to recognize interest and penalties accrued on any unrecognized tax benefits as a component of income tax expense. Significant judgment is required in the identification of uncertain tax positions and in the estimation of penalties and interest on uncertain tax positions. There were no material uncertain tax positions as of December 31, 2018 and 2017 . Foreign Currency The financial statements of the Company’s foreign subsidiaries whose functional currencies are the local currencies are translated into U.S. dollars for consolidation as follows: assets and liabilities at the exchange rate as of the balance sheet date, stockholders’ equity at the historical rates of exchange, and income and expense amounts at the average exchange rate for the period. Translation adjustments resulting from the translation of the subsidiaries’ accounts are included in “Accumulated other comprehensive income (loss)” as equity in the consolidated balance sheet. Transactions denominated in currencies other than the applicable functional currency are converted to the functional currency at the exchange rate on the transaction date. At period end, monetary assets and liabilities are remeasured to the functional currency using exchange rates in effect at the balance sheet date. Non-monetary assets and liabilities are remeasured at historical exchange rates. Gains and losses resulting from foreign currency transactions are included within “Other income (expense), net” in the consolidated statements of operations. For the year ended December 31, 2018 , foreign currency transaction loss amounted to $2.4 million as compared to a foreign currency transaction gain of $0.4 million for the year ended December 31, 2017 . Deferred Offering Costs Deferred offering costs, consisting of legal, accounting and other fees and costs relating to the Company’s IPO, are capitalized within “Other non-current assets” on the consolidated balance sheet. Due to a delayed IPO process beyond 90 days, the Company expensed the previously deferred offering costs of $1.6 million during the year ended December 31, 2017. In 2018, the Company resumed the IPO activities and capitalized $1.5 million of deferred offering costs which, upon completion of the IPO, were reclassified to equity to offset the IPO proceeds. Comprehensive Income (Loss) The Company’s comprehensive loss consists of net loss and foreign currency translation adjustments arising from the consolidation of the Company’s foreign subsidiaries. Share-Based Compensation The Company measures and recognizes compensation expense for all stock-based awards in accordance with the provisions of ASC 718, Stock Compensation . Stock-based awards granted include stock options, restricted stock units, or RSUs, and restricted stock awards, or RSAs. Share-based compensation expense for stock options granted to employees and RSAs is measured at the grant date based on the fair value of the awards and is recognized as an expense ratably on a straight-line basis over the requisite service period. The fair value of options to purchase shares granted to employees is estimated on the grant date using the Black-Scholes option valuation model. The Company accounts for stock options issued to non-employees under ASC 505-50 Equity: Equity-Based Payments to Non-Employees , using the Black-Scholes option valuation model to value stock options. The fair value of such non-employee awards is remeasured at each quarter-end over the vesting period. The calculation of share-based compensation expense requires that the Company make assumptions and judgments about the variables used in the Black-Scholes model, including the expected term, expected volatility of the underlying common shares, risk-free interest rate and dividends. The Company adopted ASU 2016-09, Improvements to Employee Share-Based Payment Accounting , under which it recognizes forfeitures as they occur rather than applying a prospective forfeiture rate in advance (see Note 10). Net Income (Loss) Per Share Basic net income (loss) per share is calculated by dividing the net income (loss) attributable to shareholders by the weighted-average number of shares outstanding during the period, without consideration for potentially dilutive securities. Diluted net income (loss) per share is computed by dividing the net income (loss) by the weighted-average number of shares and potentially dilutive securities outstanding for the period. For purposes of the diluted net loss per share calculation, any shares issuable upon exercise of share warrants, share options and non-vested restricted stock outstanding under the Company’s equity plan are potentially dilutive securities. Diluted net loss per share is the same as basic net loss per share for periods where the Company reported a net loss because including the dilutive securities would be anti-dilutive. Recent Accounting Standards Periodically, new accounting pronouncements are issued by the Financial Accounting Standards Board, or FASB, or other standard setting bodies and adopted by the Company as of the specified effective date. Unless otherwise discussed, the impact of recently issued standards that are not yet effective will not have a material impact on the Company’s consolidated financial statements upon adoption. Under the Jumpstart Our Business Startups Act of 2012, or JOBS Act, the Company meets the definition of an emerging growth company, and has elected the extended transition period for complying with new or revised accounting standards pursuant to Section 107(b) of the JOBS Act. The Company will remain an emerging growth company until the earliest of (1) the last day of its first fiscal year (a) following the fifth anniversary of the completion of our initial public offering, (b) in which we have total annual gross revenue of at least $1.07 billion , or (c) in which we are deemed to be a large accelerated filer, which means the market value of our common shares that are held by non-affiliates exceeds $700.0 million of the prior June 30th and (2) the date on which we have issued more than $1.0 billion in non-convertible debt securities during the prior three-year period. The following recent accounting pronouncements issued by the FASB, could have a material effect on our financial statements: Recently Adopted Accounting Standards In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) , which supersedes the revenue recognition requirements in ASC 605, Revenue Recognition . This ASU is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The ASU also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. ASU 2014-09 provides two methods of retrospective application. The first method would require the Company to apply ASU 2014-09 to each prior reporting period presented. The second method would require the Company to retrospectively apply ASU 2014-09 with the cumulative effect recognized at the date of initial application. ASU 2014-09 is effective for non-public business entities beginning in fiscal 2019 as a result of ASU 2015-14, “Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, ” which was issued by the FASB in August 2015 and extended the original effective date by one year. In 2016, the FASB issued additional updates to the new revenue standard relating to reporting revenue on a gross versus net basis, identifying performance obligations and licensing arrangements, and narrow-scope improvements and practical expedients, respectively. The effective date of this additional update is the same as that of ASU 2014-09. Although the Company is an emerging growth Company, as described above, effective the first quarter of 2019, the Company adopted ASC 606, Revenue from Contracts with Customers , and all the related amendments and applied it to all contracts that were not completed as of January 1, 2019 using the modified retrospective method. The impact of adoption on the Company’s consolidated balance sheet and consolidated statement of operations was assessed as not material. In January 2017, the FASB issued ASU No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business , which provides additional guidance on evaluating whether transactions should be accounted for as acquisitions of assets or businesses. The guidance requires an entity to evaluate if substantially all of the fair value of the assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets. If this threshold is met, the new guidance would define this as an asset acquisition; otherwise, the entity then evaluates whether the asset meets the requirement that a business include, at a minimum, an input and substantive process that together significantly contribute to the ability to create outputs. The Company early adopted this ASU on a prospective basis on July 1, 2018. The adoption of this ASU did not have a material impact on the consolidated financial statements. In May 2017, the FASB issued ASU 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting . This ASU provides amendments to the current guidance on determining which changes to the terms and conditions of share-based payment awards require the application of modification accounting. The effects of a modification should be accounted for unless there are no changes between the fair value, vesting conditions, and classification of the modified award and the original award immediately before the original award is modified. ASU 2017-09 became effective for non-public business entities for annual periods, including interim periods within those annual periods, beginning after December 15, 2017. The adoption of this ASU did not have a material impact on the financial statements. Recently Issued Accounting Standards In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement: Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement . This ASU modifies the disclosure requirements for fair value measurements. The modifications removed the following disclosure requirements: (i) the amount of, and reasons for, transfers between Level 1 and Level 2 of the fair value hierarchy; (ii) the policy for timing of transfers between levels; and (iii) the valuation processes for Level 3 fair value measurements. This ASU added the following disclosure requirements: (i) the changes in unrealized gains and losses for the period included in other comprehensive income ("OCI") for recurring Level 3 fair value measurements held at the end of the reporting period; and (ii) the range and weighted average of significant observable inputs used to develop Level 3 fair value measurements. This update is effective for non-public entities for annual and interim periods beginning after December 15, 2020, with early adoption permitted. As the requirements of this liter |