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 Companys distributors are obligated to pay within specified terms regardless of when, or if, they sell the products. The Companys 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 Companys 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 consignees 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.