Revenue Recognition The Company generates revenue primarily through the sale and delivery of promised goods or services to customers and recognizes revenue when control is transferred to customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for the goods or services. Performance obligations typically include the delivery of promised products, such as breast implants, tissue expanders, BIOCORNEUM, miraDry Systems and bioTips, along with service-type warranties and deliverables under certain marketing programs. Other deliverables are sometimes promised, but are ancillary and insignificant in the context of the contract as a whole. Sales prices are documented in the executed sales contract, purchase order or order acknowledgement prior to the transfer of control to the customer. Customers may enter into a separate extended service agreement to purchase an extended warranty for miraDry products from the Company whereby the payment is due at the inception of the agreement. Typical payment terms are 30 days for Breast Products and direct sales of consumable miraDry products, and tend to be longer for capital sales of miraDry Systems and sales to miraDry distributors, but do not extend beyond one year. For delivery of promised products, control transfers and revenue is recognized upon shipment, unless the contractual arrangement requires transfer of control when products reach their destination, for which revenue is recognized once the product arrives at its destination. Revenue for extended service agreements are recognized ratably over the term of the agreements. For Breast Products, with the exception of the Companys BIOCORNEUM scar management products, the Company allows for the return of products from customers within six months after the original sale, which is accounted for as variable consideration. Reserves are established for anticipated sales returns based on the expected amount calculated with historical experience, recent gross sales and any notification of pending returns. The estimated sales return is recorded as a reduction of revenue and as a sales return liability in the same period revenue is recognized. 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 would be recorded. The Company has established an allowance for sales returns of $8.7 million and $8.1 million as of March 31, 2020 and December 31, 2019 respectively, recorded as sales return liability on the condensed consolidated balance sheets. The following table provides a rollforward of the sales return liability (in thousands): Sales return liability Balance as of December 31, 2019 $ 8,116 Addition to reserve for sales activity 28,538 Actual returns (28,074 ) Change in estimate of sales returns 127 Balance as of March 31, 2020 $ 8,707 For Breast Products, a portion of the Companys revenue is generated from the sale of consigned inventory of breast implants maintained at doctor, hospital, and clinic locations. For these products, revenue is recognized at the time the Company is notified by the customer that the product has been implanted, not when the consigned products are delivered to the customers location. For miraDry, in addition to domestic and international direct sales, the Company leverages a distributor network for selling the miraDry System internationally. The Company recognizes revenue when control of the goods or services is transferred to the distributors. Standard terms in both direct sales agreements (domestic and international), and international distributor agreements do not allow for trial periods, right of return, refunds, payment contingent on obtaining financing or other terms that could impact the customers payment obligation. Arrangements with Multiple Performance Obligations The Company has determined that the delivery of each unit of product in the Companys revenue contracts with customers is a separate performance obligation. The Companys revenue contracts may include multiple products or services, each of which is considered a separate performance obligation. For such arrangements, the Company allocates revenue to each performance obligation based on its relative standalone selling price. The Company generally determines standalone selling prices based on observable prices or using an expected cost plus margin approach when an observable price is not available. The Company invoices customers once products are shipped or delivered to customers depending on the negotiated shipping terms. The Company introduced its Platinum20 Limited Warranty Program, or Platinum20, in May 2018 on all OPUS breast implants implanted in the United States or Puerto Rico on or after May 1, 2018. Platinum20 provides for financial assistance for revision surgeries and no-charge contralateral replacement implants upon the occurrence of certain qualifying events. The Company considers Platinum20 to have an assurance warranty component and a service warranty component. The assurance component is recorded as a warranty liability at the time of sale (as discussed in Note 7). The Company considers the service warranty component as an additional performance obligation and defers revenue at the time of sale based on the relative estimated selling price, by estimating a standalone selling price using the expected cost plus margin approach for the performance obligation. Inputs into the expected cost plus margin approach include historical incidence rates, estimated replacement costs, estimated financial assistance payouts and an estimated margin. The liability for unsatisfied performance obligations under the service warranty as of March 31, 2020 and December 31, 2019 was $1.3 million and $1.2 million, respectively. The short-term obligation related to the service warranty as of both March 31, 2020 and December 31, 2019 was $0.5 million and is included in accrued and other current liabilities on the condensed consolidated balance sheets. The long-term obligation related to the service warranty as of March 31, 2020 and December 31, 2019 was $0.8 million and $0.7 million, respectively, and is included in warranty reserve and other long-term liabilities on the condensed consolidated balance sheets. The performance obligation is satisfied at the time that Platinum20 benefits are provided and are expected to be satisfied over the following 3 to 24 month period for financial assistance and 20 years for product replacement. Revenue recognized for the service warranty performance obligations for the three months ended March 31, 2020 was immaterial. Practical Expedients and Policy Election The Company generally expenses sales commissions when incurred because the amortization period would have been one year or less. These costs are recorded within sales and marketing expenses. The Company does not adjust accounts receivable for the effects of any significant financing components as customer payment terms are shorter than one year. The Company has elected to account for shipping and handling activities performed after a customer obtains control of the products as activities to fulfill the promise to transfer the products to the customer. Shipping and handling activities are largely provided to customers free of charge for the Breast Products segment. The associated costs were $0.7 million and $0.4 million for the three months ended March 31, 2020 and 2019, respectively. These costs are viewed as part of the Companys sales and marketing programs and are recorded as a component of sales and marketing expense in the condensed consolidated statement of operations as an accounting policy election. For the miraDry segment, shipping and handling charges are typically billed to customers and recorded as revenue. The shipping and handling costs incurred are recorded as a component of cost of goods sold in the condensed consolidated statement of operations. The associated costs were $0.1 million for both the three months ended March 31, 2020 and 2019.