Summary of Significant Accounting Policies	12 Months Ended
Dec. 31, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation The accompanying consolidated financial statements of Harmonic include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. The Company’s fiscal quarters are based on 13-week periods, except for the fourth quarter which ends on December 31. Discontinued Operations On March 5, 2013, the Company completed the sale of its cable access hybrid-fiber coaxial (“HFC”) business to Aurora Networks (“Aurora”) for $46.0 million in cash. The results of operations associated with the cable access HFC business were presented as discontinued operations in its condensed consolidated financial statements as described in Note 3, “Discontinued Operations”. There were no operating activities associated with the cable access HFC business after December 31, 2013. Unless noted otherwise, all discussions herein with respect to the Company’s audited consolidated financial statements relate to the Company’s continuing operations. Use of Estimates The preparation of condensed consolidated financial statements in conformity with generally accepted accounting principles in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Reclassifications / Out-of-Period Adjustments Starting in the second quarter of 2015, in lieu of presenting the amortization of investment premium as a positive adjustment in the reconciliation of net income to operating cash flows, the entire cash flow, including premium is now reflected as an investing outflow, akin to a return of capital. The Company adopted this new classification method on a prospective basis starting 2015 because the new classification method does not have a material impact to the Company’s Consolidated Statements of Cash Flow for all prior periods effected. Cash and Cash Equivalents and Short-term investments Cash and cash equivalents include all cash and highly liquid investments with maturities of three months or less at the date of purchase. The carrying amount of cash and cash equivalents approximates fair value because of the short maturity of those instruments. Restricted Cash and Deposits As of December 31, 2015, the Company had $1.1 million of total restricted cash. The restricted cash balances are held as cash collateral security for certain bank guarantees and it is included in “Prepaid expenses and other current assets” in the Company’s Consolidated Balance Sheet. These restricted funds are invested in bank deposits and cannot be withdrawn from the Company’s accounts without the prior written consent of the applicable secured party. Short-Term Investments The Company’s short-term investments, which are classified as available-for-sale securities, comprised primarily of U.S. federal government bonds, state, municipal and local government agencies bonds, corporate bonds, commercial paper and certificates of deposit, with stated maturities greater than three months from the date of purchase. The Company may or may not hold these securities until maturity because after considering the Company’s liquidity requirements, the Company may sell these securities prior to their stated maturities. Since these securities are considered as available to support current operations, the Company classifies securities with maturities beyond 12 months as current assets under short-term investments in the Consolidated Balance Sheets. Short-term investments are stated at fair value, with unrealized gains and losses reported in accumulated other comprehensive income (loss) in the Consolidated Balance Sheet. The specific identification method is used to determine the cost of securities disposed of, with realized gains and losses reflected in other income (expense), net in the Company’s Consolidated Statements of Operations. The Company monitors its investment portfolio for impairment on a periodic basis. In the event a decline in value is determined to be other than temporary, an impairment charge is recorded. The Company considers current market conditions, as well as the likelihood that it would need to sell its investments prior to a recovery of par value, when determining if a loss is other than temporary. Investments in Equity Securities From time to time, the Company may acquire certain equity investments for the promotion of business and strategic objectives and these investments may be in marketable equity securities or non-marketable equity securities. The Company accounts for its investments in entities that it does not have significant influence under the cost method. Investments in equity securities are carried at fair value if the fair value of the security is readily determinable. Equity investments carried at fair value are classified as long-term investments and included in “Other assets” in the Company’s Consolidated Balance Sheet. Unrealized gains and losses, net of taxes, on the long-term investments are included in the Company’s Consolidated Balance Sheet as a component of accumulated other comprehensive income (loss). Investments in equity securities that do not qualify for fair value accounting or equity method accounting are accounted for under the cost method. In accordance with the cost method, the Company’s initial investment is recorded at cost and the Company reviews all of its cost method investments quarterly to determine if impairment indicators exist. Cost method investments are classified as long-term investments and included in “Other assets” in the Company’s Consolidated Balance Sheet. Variable Interest Entities From time to time, the Company may enter into investments in entities that are considered variable interest entities under Accounting Standards Codification (ASC) Topic 810. If the Company is the primary beneficiary of a variable interest entity (“VIE”), it is required to consolidate it. To determine if the Company is the primary beneficiary of a VIE, the Company evaluates whether it has (1) the power to direct the activities that most significantly impact the VIE’s economic performance, and (2) the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. The assessment of whether the Company is the primary beneficiary of its VIE requires significant assumptions and judgments. The Company has concluded that none of the Company’s equity investments require consolidation as they are either not variable interest entities or, of the equity investments that are variable interest entities, the Company is not considered to be the primary beneficiary based on an assessment performed by management. Concentrations of Credit Risk/Major Customers/Supplier Concentration Financial instruments which subject the Company to concentrations of credit risk consist primarily of cash, cash equivalents, short-term investments and accounts receivable. Cash, cash equivalents and short-term investments are invested in short-term, highly liquid, investment-grade obligations of commercial or governmental issuers, in accordance with the Company’s investment policy. The investment policy limits the amount of credit exposure to any one financial institution, commercial or governmental issuer. The Company’s accounts receivable are derived from sales to cable, satellite, telco, and broadcast and media companies. The Company generally does not require collateral from its customers, and performs ongoing credit evaluations of its customers and provides for expected losses. The Company maintains an allowance for doubtful accounts based upon the expected collectability of its accounts receivable. No customers had a balance greater than 10% of the Company’s net accounts receivable balance as of December 31, 2015 and 2014. In the years ended December 31, 2015, 2014 and 2013, sales to Comcast accounted for 12%, 16% and 12% of the Company’s net revenue, respectively, and no other single customer accounts for more than 10% of total net revenue. Certain of the components and subassemblies included in the Company’s products are obtained from a single source or a limited group of suppliers. Although the Company seeks to reduce dependence on those sole source and limited source suppliers, the partial or complete loss of certain of these sources could have at least a temporary adverse effect on the Company’s results of operations and damage customer relationships. Revenue Recognition The Company’s principal sources of revenue are from the sale of hardware, software, hardware and software maintenance contracts, and end-to-end solutions, encompassing design, manufacture, test, integration and installation of products. The Company recognizes revenue when persuasive evidence of an arrangement exists, delivery has occurred or services have been provided, the sale price is fixed or determinable, and collectability is reasonably assured. Revenue from the sale of hardware and software products is recognized when risk of loss and title have transferred. For most of the Company’s product sales, these criteria are met at the time the product is shipped or delivery has occurred. Revenue from distributors and system integrators is recognized on delivery of the related products, provided all other revenue recognition criteria have been met. The Company’s agreements with these distributors and system integrators have terms which are generally consistent with the standard terms and conditions for the sale of the Company’s equipment to end users, and do not provide for product rotation or pricing allowances, as are typically found in agreements with stocking distributors. The Company accrues for sales returns and other allowances based on probable customer returns. Deferred revenue includes billings in excess of revenue recognized, net of deferred cost of revenue, and invoiced amounts remain deferred until applicable revenue recognition criteria are met. Shipping and handling costs incurred for inventory purchases and product shipments are recorded in cost of revenue in the Company’s Consolidated Statements of Operations. Costs associated with services are generally recognized as incurred. The Company recognizes revenue from the sale of hardware products and software bundled with hardware that is essential to the functionality of the hardware in accordance with applicable revenue recognition accounting guidance. For the sale of stand-alone software products, bundled with hardware but not essential to the functionality of the hardware, revenue is allocated between the hardware, including essential software and related elements, and the non-essential software and related elements. Revenue for the hardware and essential software elements are recognized under the relative allocation method. Revenue for the non-essential software and related elements are recognized under the residual method in accordance with software accounting guidance. Revenue associated with service and maintenance agreements is recognized on a straight-line basis over the period in which the services are performed, generally one year. The Company recognizes revenue associated with solution sales using the percentage of completion or completed contract methods of accounting. Further details of these accounting policies are described below. Multiple Element Arrangements. The Company has revenue arrangements that include hardware and software essential to the hardware product’s functionality, and non-essential software, services and support. For transactions originating or materially modified, beginning January 1, 2011, the Company has applied the accounting guidance that requires the Company to allocate revenue to all deliverables based on their relative selling prices. For transactions originating prior to January 1, 2011, the Company applied software revenue recognition accounting guidance, as described in the “Software” section below. The Company determines the relative selling prices by first considering vendor-specific objective evidence of fair value (“VSOE”), if it exists; otherwise third-party evidence (“TPE”) of the selling price is used. If neither VSOE nor TPE exists for a deliverable, the Company uses a best estimate of the selling price (“BESP”) for that deliverable. Once revenue is allocated to all deliverables based on their relative selling prices, revenue related to hardware elements (hardware, essential software and related services) are recognized using a relative selling price allocation and non-essential software and related services are recognized under the residual method. Harmonic has established VSOE for certain elements of its arrangements based on either historical stand-alone sales to third parties or stated renewal rates for maintenance. The Company has VSOE of fair value for maintenance, training and certain professional services. TPE is determined based on competitor prices for similar deliverables when sold separately. The Company is typically not able to determine TPE for competitors’ products or services. Generally, the Company’s go-to-market strategy differs from that of its competitors’ and the Company’s offerings contain a significant level of differentiation, such that the comparable pricing of products with similar functionality cannot be obtained. Furthermore, the Company is unable to reliably determine what competitor similar products’ selling prices are on a stand-alone basis. When the Company is unable to establish fair value of non-software deliverables using VSOE or TPE, the Company uses BESP in its allocation of arrangement consideration. The objective of using BESP is to determine the price at which the Company would transact a sale if the product or service were sold on a stand-alone basis. The Company determines BESP for a product or service by considering multiple factors, including, but not limited to, pricing practices, market conditions, competitive landscape, internal costs, geographies and gross margin. The determination of BESP is made through consultation with Company’s management, taking into consideration the Company’s go-to-market strategy. Software. Sales of stand-alone software that are not considered essential to the functionality of the hardware continue to be subject to the software revenue recognition guidance. In accordance with the software revenue recognition guidance, the Company applies the residual method to recognize revenue for the delivered elements in stand-alone software transactions. Under the residual method, the amount of revenue allocated to delivered elements equals the total arrangement consideration, less the aggregate fair value of any undelivered elements, typically maintenance, provided that vendor specific objective evidence (“VSOE”) of fair value exists for all undelivered elements. VSOE of fair value is based on the price charged when the element is sold separately or, in the case of maintenance, substantive renewal rates for maintenance. Solution Sales. Solution sales for the design, manufacture, test, integration and installation of products, including equipment acquired from third parties to be integrated with Harmonic’s products, that are customized to meet the customer’s specifications are accounted for in accordance with applicable guidance on accounting for performance of construction/production contracts. Accordingly, for each arrangement that the Company enters into that includes both products and services, the Company performs a detailed evaluation to determine whether the arrangement should be accounted for under guidance for construction/production contracts or, alternatively, for arrangements that do not involve significant production, modification or customization, under other applicable accounting guidance. The Company has a long-standing history of entering into contractual arrangements to deliver the solution sales described. At the outset of each arrangement accounted for as a single arrangement, the Company develops a detailed project plan and associated labor hour estimates for each project. The Company believes that, based on its historical experience, it has the ability to make labor cost estimates that are sufficiently dependable to justify the use of the percentage-of-completion method of accounting. Under the percentage-of-completion method, revenue recognized reflects the portion of the anticipated contract revenue that has been earned, equal to the ratio of actual labor hours expended to total estimated labor hours to complete the project. Costs are recognized proportionally to the labor hours incurred. For contracts that include customized services for which labor costs are not reasonably estimable, the Company uses the completed contract method of accounting. Under the completed contract method, 100% of the contract’s revenue and cost is recognized upon the completion of all services under the contract. If the estimated costs to complete a project exceed the total contract amount, indicating a loss, the entire anticipated loss is recognized. Inventories Inventories are stated at the lower of cost or market. Cost is computed using standard cost, which approximates actual cost, on a first-in, first-out basis. The cost of inventories is comprised of material, labor and manufacturing overhead. The Company’s manufacturing overhead standards for product costs are calculated assuming full absorption of forecasted spending over projected volumes. The Company establishes provisions for excess and obsolete inventories to reduce such inventories to their estimated net realizable value after evaluation of historical sales, future demand and market conditions, expected product life cycles and current inventory levels. Such provisions are charged to cost of revenue in the Company’s Consolidated Statements of Operations. Capitalized Software Development Costs Costs related to research and development are generally charged to expense as incurred. Capitalization of material software development costs begins when a product’s technological feasibility has been established. To date, the time period between achieving technological feasibility, which the Company has defined as the establishment of a working model, which typically occurs when beta testing commences, and the general availability of such software has been short, and, as such, software development costs qualifying for capitalization have been insignificant. The Company incurs costs associated with developing software for internal use and for which no plan exists to market the software externally. The Company capitalizes the costs as part of property and equipment and recognizes the associated depreciation over the software’s estimated useful life of generally three years. Capitalized software costs for internal use have been insignificant in each of the periods presented. Property and Equipment Property and equipment are recorded at cost. Depreciation and amortization are computed using the straight-line method over the estimated useful lives of the assets. Estimated useful lives are five years for furniture and fixtures, three years for software developed for internal use and typically four years for machinery and equipment. Depreciation and amortization for leasehold improvements are computed using the shorter of the remaining useful lives of the assets, up to ten years, or the lease term of the respective assets. Goodwill Goodwill represents the difference between the purchase price and the estimated fair value of the identifiable assets acquired and liabilities assumed. The Company tests for goodwill impairment at the reporting unit level on an annual basis in the fourth quarter of each of its fiscal years, and at any other time at which events occur or circumstances indicate that the carrying amount of goodwill may exceed its fair value. The Company uses a two-step process to determine the amount of goodwill impairment. The first step requires comparing the fair value of the reporting unit to its net book value, including goodwill. A potential impairment exists if the fair value of the reporting unit is lower than its net book value. The second step of the process, which is performed only if a potential impairment exists, involves determining the difference between the fair value of the reporting unit’s net assets other than goodwill and the fair value of the reporting unit. If this difference is less than the net book value of goodwill, an impairment exists and is recorded. In fiscal 2013, the Company performed goodwill impairment test as a single reporting unit. In fiscal 2014, due to a change in the Company’s reporting structure, the goodwill impairment is tested at its two reporting units, which are the same as the operating segments (see Note 17, “Segment Information, Geographic Information and Customer Concentration” for additional information on operating segments). Goodwill is assigned to the reporting units using the relative fair values of the reporting units and the fair values of the reporting units were determined utilizing a blend of the income approach and the market approach. There was no impairment of goodwill resulting from the Company’s fiscal 2015 annual impairment testing in the fourth quarter of 2015 (See Note 8, “Goodwill and Identified Intangible Assets” for additional information). Long-lived Assets Long-lived assets represent property and equipment and purchased intangible assets. Purchased intangible assets from business combinations and asset acquisitions include customer contracts, trademarks and trade names, and maintenance agreements and related relationships, the amortization of which is charged to general and administrative expenses, and core technology and developed technology, the amortization of which is charged to cost of revenue. The Company evaluates the recoverability of intangible assets and other long-lived assets when indicators of impairment are present. When impairment indicators are present, the Company evaluates the recoverability of intangible assets and other long-lived assets on the basis of undiscounted cash flows expected to result from the use of each asset group and its eventual disposition. If the undiscounted expected future cash flows are less than the carrying amount of the asset, an impairment loss is recognized in order to writedown the carrying value of the asset to its estimated fair market value. In connection with restructuring actions initiated during 2014, the Company recorded a fixed assets impairment charge of $1.1 million in fiscal 2014 related to software development costs incurred for a discontinued project. Foreign Currency The functional currency of the Company’s Israeli, Cayman and Swiss operations is the U.S. dollar. All other foreign subsidiaries use the respective local currency as the functional currency. When the local currency is the functional currency, gains and losses from translation of these foreign currency financial statements into U.S. dollars are recorded as a separate component of other comprehensive loss in stockholders’ equity. For subsidiaries where the functional currency is the U.S. dollar, monetary assets and liabilities denominated in currencies other than the U.S. dollar are remeasured into U.S. dollars using exchange rates prevailing on the balance sheet date. The remeasurement gains and losses are included in other income (expense), net in the Company’s Consolidated Statements of Operations. The Company recorded remeasurement losses of $0.5 million, $0.4 million and $0.5 million for the years ended December 31, 2015, 2014 and 2013, respectively. Derivative Instruments The Company enters into derivative instruments, primarily foreign currency forward contracts, to minimize the short-term impact of foreign currency exchange rate fluctuations on certain foreign currency denominated assets and liabilities as well as certain foreign currencies denominated expenses. The Company does not enter into derivative instruments for trading purposes and these derivatives generally have maturities within twelve months. The derivative instruments are recorded at fair value in prepaid expenses and other current assets or accrued liabilities in the Company’s Consolidated Balance Sheet. For derivative instruments designated and qualifying as cash flow hedges of forecasted foreign currency denominated transactions expected to occur within twelve months, the effective portion of the gain or loss on these hedges is reported as a component of “Accumulated other comprehensive income (loss)” in stockholders’ equity, and is reclassified into earnings when the hedged transaction affects earnings. If the transaction being hedged fails to occur, or if a portion of any derivative is (or becomes) ineffective, the gain or loss on the associated financial instrument is recorded immediately in earnings. For derivative instruments used to hedge existing foreign currency denominated assets or liabilities, the gains or losses on these hedges are recorded immediately in earnings to offset the changes in the fair value of the assets or liabilities being hedged. Fair Value of Financial Instruments The carrying value of the Company’s financial instruments, including cash equivalents, restricted cash, short-term investments, accounts receivable, accounts payable and accrued liabilities, approximate fair value due to their short maturities. Restructuring and Related Charges The Company’s restructuring charges consist primarily of employee severance, one-time termination benefits related to the reduction of its workforce, lease exit costs, and other costs. Liabilities for costs associated with a restructuring activity are recognized when the liability is incurred and are measured at fair value. One-time termination benefits are expensed at the date the entity notifies the employee, unless the employee must provide future service, in which case the benefits are expensed ratably over the future service period. Termination benefits are calculated based on regional benefit practices and local statutory requirements. Costs to terminate a lease before the end of its term are recognized when the entity terminates the contract in accordance with the contract terms. The Company determines the excess facilities accrual based on expected cash payments, under the applicable facility lease, reduced by any estimated sublease rental income for such facility. Other costs primarily consist of costs to write down the values of inventories and leasehold improvement write-down as a result of restructuring activities (see Note 11, “Restructuring and Asset Impairment Charges” for additional information). Warranty The Company accrues for estimated warranty costs at the time of revenue recognition and records such accrued liabilities as part of cost of revenue. Management periodically reviews its warranty liability and adjusts the accrued liability based on the terms of warranties provided to customers, historical and anticipated warranty claims experience, and estimates of the timing and cost of warranty claims. Advertising Expenses All advertising costs are expensed as incurred and included in “Selling, general and administrative expenses” in the Company’s Consolidated Statements of Operations. Advertising expense was $1.4 million, $0.2 million and $0.4 million for the years ended December 31, 2015, 2014 and 2013, respectively. Stock-based Compensation Expense The Company measures and recognizes compensation expense for all stock-based compensation awards made to employees and directors, including stock options, restricted stock units and awards related to the Company’s Employee Stock Purchase Plan (“ESPP”), based upon the grant-date fair value of those awards. Applicable accounting guidance requires companies to estimate the fair value of stock-based compensation awards on the date of grant. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service period in the Company’s Consolidated Statements of Operations. The fair value of stock options is estimated at grant date using the Black-Scholes option pricing model. The Company’s determination of fair value of stock options on the date of grant, using an option pricing model, is affected by the Company’s stock price, as well as the assumptions regarding a number of highly complex and subjective variables. These variables include, but are not limited to, the Company’s expected stock price volatility over the term of the awards and projected employee stock option exercise behaviors. The fair value of each restricted stock unit grant is based on the underlying value of the Company’s common stock on the date of grant. Income Taxes In preparing the Company’s financial statements, the Company estimates the income taxes for each of the jurisdictions in which the Company operates. This involves estimating the Company’s actual current tax exposures and assessing temporary and permanent differences resulting from differing treatment of items, such as reserves and accruals, for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are included within the Company’s Consolidated Balance Sheet. The Company’s income tax policy is to record the estimated future tax effects of temporary differences between the tax bases of assets and liabilities and amounts reported in the Company’s accompanying Consolidated Balance Sheets, as well as operating loss and tax credit carryforwards. The Company follows the guidelines set forth in the applicable accounting guidance regarding the recoverability of any tax assets recorded on the Consolidated Balance Sheet and provides any necessary allowances as required. Determining necessary allowances requires the Company to make assessments about the timing of future events, including the probability of expected future taxable income and available tax planning opportunities. A history of operating losses in recent years has led to uncertainty with respect to our ability to realize certain of our net deferred tax assets, and as a result we applied full valuation allowance against our U.S. net deferred tax assets as of December 31, 2015. In the event that actual results differ from these estimates or the Company adjusts these estimates in future periods, the Company’s operating results and financial position could be materially affected. The Company is subject to examination of its income tax returns by various tax authorities on a periodic basis. The Company regularly assesses the likelihood of adverse outcomes resulting from such examinations to determine the adequacy of its provision for income taxes. The Company has applied the provisions of the applicable accounting guidance on accounting for uncertainty in income taxes, which requires application of a more-likely-than-not threshold to the recognition and de-recognition of uncertain tax positions. If the recognition threshold is met, the applicable accounting guidance permits the Company to recognize a tax benefit measured at the largest amount of tax benefit that, in the Company’s judgment, is more than 50% likely to be realized upon settlement. It further requires that a change in judgment related to the expected ultimate resolution of uncertain tax positions be recognized in earnings in the period of such change. The Company files annual income tax returns in multiple taxing jurisdictions around the world. A number of years may elapse before an uncertain tax position is audited and finally resolved. While it is often difficult to predict the final outcome or the timing of resolution of any particular uncertain tax position, the Company believes that its reserves for income taxes reflect the most likely outcome. The Company adjusts these reserves and penalties, as well as the related interest, in light of changing facts and circumstances. Changes in the Company’s assessment of its uncertain tax positions or settlement of any particular position could materially and adversely impact the Company’s income tax rate, operating results, financial position and cash flows. Segment Reporting Operating segments are defined as components of an enterprise that engage in business activities for which separate financial information is available and is evaluated by the Chief Operating Decision Maker (“CODM”), which for the Company is its Chief Executive Officer, in deciding how to allocate resources and assess performance. Prior to the fourth quarter of 2014, the Company operated its business in one reportable segment. With effect from the fourth quarter of 2014, the Company changed its operating segments to align with how the CODM evaluates the financial information used to allocate resources and assess performance of the Company. The new reporting structure consists of two operating segments: Video and Cable Edge. All prior period segment information presented has been conformed to the new operating segments. Comprehensive Income (Loss) Comprehensive income (loss) includes net income (loss) and other comprehensive income (loss). Other comprehensive income (loss) includes cumulative translation adjustments, unrealized gains and losses on certain foreign currency forward contracts that qualify as cash flow hedges and available-for-sale securities. Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued new authoritative guidance for revenue recognition, requiring an entity to recognize the amount of revenue that reflects the consideration to which it expects to be entitled for the transfer of promised goods or services to customers. The updated standard will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective and permits the use of either the retrospective or cumulative effect transition method. The original effective date for this new standard would have required the Company to adopt beginning in its first quarter of 2018. In August 2015, the FASB issued an accounting standard update for the deferral of the effective date by one year and permits early adoption, but not before the original effective date. Accordingly, the Company may adopt the standard in either its first quarter of 2018 or 2019. The new revenue standard may be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as of the date of adoption. The Company is currently evaluating the timing of its adoption and the impact of adopting the new revenue standard on its consolidated financial statements. In November 2014, the FASB issued an accounting standard update for determining when separation of certain embedded derivative features in a hybrid financial instrument is required. An entity will continue to evaluate whether the economic characteristics and risks of the embedded derivative feature are clearly and closely related to those of the host contract, among other relevant criteria. The amendments clarify how current GAAP should be interpreted in evaluating the economic characteristics and risks of a host contract in a hybrid financial instrument that is issued in the form of a share. The accounting standard update will be effective for the Company beginning in the first quarter of fiscal 2016 and early adoption is permitted. The adoption of this accounting standard update will not impact the Company’s financial position, results of operations or cash flows. In February 2015, the FASB issued an accounting standard update that changes the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. This accounting standard update will be effective for the Company beginning in the first quarter of fiscal 2016 and early adoption is permitted. The adoption of this new guidance is not expected to have a material impact on the Company’s consolidated financial statements. In April 2015, the FASB issued an accounting standard update that requires debt issuance costs to be presented as a direct deduction from the carrying amount of the related debt liability, consistent with the presentation of debt discounts. Prior to this accounting update, debt issuance costs were required to be presented as deferred charge assets, separate from the related debt liability. This accounting standard update does not change the recognition and measurement requirements for debt issuance costs. The Company early-adopted this accounting standard update as of the end of its fiscal 2015 in connection with the convertible senior notes issued in December 2015 (see Note 12, “Convertible Notes and Credit Facilities”), resulting in the classification of $3.2 million of unamortized debt issuance costs as a deduction from long-term liability on its Consolidated Balance Sheet at December 31, 2015. Other than this transaction, the adoption of this accounting standard update did not have an impact on the Company’s consolidated financial statements. In July 2015, the FASB issued an accounting standard update that requires inventory to be measured at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. This accounting standard update will be effective for the Company beginning in the first quarter of fiscal 2017 and early adoption is permitted. The Company is currently evaluating the impact of this accounting standard update on its consolidated financial statements. In November 2015, the FASB issued an accounting standard update that all deferred tax assets and liabilities, along with any related valuation allowance, be classified as non-current on the balance sheet. The accounting standard update will be effective for the Company beginning in the first quarter of fiscal 2017 and early adoption is permitted. The Company early-adopted prospectively this accounting standard update as of the end of its fiscal 2015, resulting in $15.9 million of net deferred tax assets, along with its related valuation allowance, being classified as non-current on the Consolidated Balance Sheet as of December 31, 2015. Other than this reclassification, the adoption of this accounting standard update did not have an impact on the Company’s consolidated financial statements. In January 2016, the FASB issued an accounting standard update which requires equity investments to be measured at fair value with changes in fair value recognized in net income and simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment. The accounting standard update also updates certain presentation and disclosure requirements. This accounting standard update will be effective for the Company beginning in the first quarter of fiscal 2018 and early adoption is permitted. The Company is currently evaluating the impact of this accounting standard update on its consolidated financial statements. In February 2016, the FASB amends the existing accounting standard for lease accounting. Under this guidance, lessees and lessors should apply a “right-of-use” model in accounting for all leases (including subleases) and eliminate the concept of operating leases and off-balance sheet leases. This new leases standard requires a modified retrospective transition approach for all leases existing at, or entered into after, the date of initial application, with an option to use certain transition relief. The new standard will be effective for the Company beginning in the first quarter of fiscal 2019 and early adoption is permitted. The Company is currently evaluating the methods and impact of adopting the new leases standard on its consolidated financial statements.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The accompanying consolidated financial statements of Harmonic include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. The Company’s fiscal quarters are based on 13-week periods, except for the fourth quarter which ends on December 31.

Discontinued Operations

On March 5, 2013, the Company completed the sale of its cable access hybrid-fiber coaxial (“HFC”) business to Aurora Networks (“Aurora”) for $46.0 million in cash. The results of operations associated with the cable access HFC business were presented as discontinued operations in its condensed consolidated financial statements as described in Note 3, “Discontinued Operations”. There were no operating activities associated with the cable access HFC business after December 31, 2013. Unless noted otherwise, all discussions herein with respect to the Company’s audited consolidated financial statements relate to the Company’s continuing operations.

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with generally accepted accounting principles in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Reclassifications / Out-of-Period Adjustments

Starting in the second quarter of 2015, in lieu of presenting the amortization of investment premium as a positive adjustment in the reconciliation of net income to operating cash flows, the entire cash flow, including premium is now reflected as an investing outflow, akin to a return of capital. The Company adopted this new classification method on a prospective basis starting 2015 because the new classification method does not have a material impact to the Company’s Consolidated Statements of Cash Flow for all prior periods effected.

Cash and Cash Equivalents and Short-term investments

Cash and cash equivalents include all cash and highly liquid investments with maturities of three months or less at the date of purchase. The carrying amount of cash and cash equivalents approximates fair value because of the short maturity of those instruments.

Restricted Cash and Deposits

As of December 31, 2015, the Company had $1.1 million of total restricted cash. The restricted cash balances are held as cash collateral security for certain bank guarantees and it is included in “Prepaid expenses and other current assets” in the Company’s Consolidated Balance Sheet. These restricted funds are invested in bank deposits and cannot be withdrawn from the Company’s accounts without the prior written consent of the applicable secured party.

Short-Term Investments

The Company’s short-term investments, which are classified as available-for-sale securities, comprised primarily of U.S. federal government bonds, state, municipal and local government agencies bonds, corporate bonds, commercial paper and certificates of deposit, with stated maturities greater than three months from the date of purchase. The Company may or may not hold these securities until maturity because after considering the Company’s liquidity requirements, the Company may sell these securities prior to their stated maturities. Since these securities are considered as available to support current operations, the Company classifies securities with maturities beyond 12 months as current assets under short-term investments in the Consolidated Balance Sheets.

Short-term investments are stated at fair value, with unrealized gains and losses reported in accumulated other comprehensive income (loss) in the Consolidated Balance Sheet. The specific identification method is used to determine the cost of securities disposed of, with realized gains and losses reflected in other income (expense), net in the Company’s Consolidated Statements of Operations. The Company monitors its investment portfolio for impairment on a periodic basis. In the event a decline in value is determined to be other than temporary, an impairment charge is recorded. The Company considers current market conditions, as well as the likelihood that it would need to sell its investments prior to a recovery of par value, when determining if a loss is other than temporary.

Investments in Equity Securities

From time to time, the Company may acquire certain equity investments for the promotion of business and strategic objectives and these investments may be in marketable equity securities or non-marketable equity securities. The Company accounts for its investments in entities that it does not have significant influence under the cost method. Investments in equity securities are carried at fair value if the fair value of the security is readily determinable. Equity investments carried at fair value are classified as long-term investments and included in “Other assets” in the Company’s Consolidated Balance Sheet. Unrealized gains and losses, net of taxes, on the long-term investments are included in the Company’s Consolidated Balance Sheet as a component of accumulated other comprehensive income (loss). Investments in equity securities that do not qualify for fair value accounting or equity method accounting are accounted for under the cost method. In accordance with the cost method, the Company’s initial investment is recorded at cost and the Company reviews all of its cost method investments quarterly to determine if impairment indicators exist. Cost method investments are classified as long-term investments and included in “Other assets” in the Company’s Consolidated Balance Sheet.

Variable Interest Entities

From time to time, the Company may enter into investments in entities that are considered variable interest entities under Accounting Standards Codification (ASC) Topic 810. If the Company is the primary beneficiary of a variable interest entity (“VIE”), it is required to consolidate it. To determine if the Company is the primary beneficiary of a VIE, the Company evaluates whether it has (1) the power to direct the activities that most significantly impact the VIE’s economic performance, and (2) the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. The assessment of whether the Company is the primary beneficiary of its VIE requires significant assumptions and judgments. The Company has concluded that none of the Company’s equity investments require consolidation as they are either not variable interest entities or, of the equity investments that are variable interest entities, the Company is not considered to be the primary beneficiary based on an assessment performed by management.

Concentrations of Credit Risk/Major Customers/Supplier Concentration

Financial instruments which subject the Company to concentrations of credit risk consist primarily of cash, cash equivalents, short-term investments and accounts receivable. Cash, cash equivalents and short-term investments are invested in short-term, highly liquid, investment-grade obligations of commercial or governmental issuers, in accordance with the Company’s investment policy. The investment policy limits the amount of credit exposure to any one financial institution, commercial or governmental issuer. The Company’s accounts receivable are derived from sales to cable, satellite, telco, and broadcast and media companies. The Company generally does not require collateral from its customers, and performs ongoing credit evaluations of its customers and provides for expected losses. The Company maintains an allowance for doubtful accounts based upon the expected collectability of its accounts receivable. No customers had a balance greater than 10% of the Company’s net accounts receivable balance as of December 31, 2015 and 2014. In the years ended December 31, 2015, 2014 and 2013, sales to Comcast accounted for 12%, 16% and 12% of the Company’s net revenue, respectively, and no other single customer accounts for more than 10% of total net revenue.

Certain of the components and subassemblies included in the Company’s products are obtained from a single source or a limited group of suppliers. Although the Company seeks to reduce dependence on those sole source and limited source suppliers, the partial or complete loss of certain of these sources could have at least a temporary adverse effect on the Company’s results of operations and damage customer relationships.

Revenue Recognition

The Company’s principal sources of revenue are from the sale of hardware, software, hardware and software maintenance contracts, and end-to-end solutions, encompassing design, manufacture, test, integration and installation of products. The Company recognizes revenue when persuasive evidence of an arrangement exists, delivery has occurred or services have been provided, the sale price is fixed or determinable, and collectability is reasonably assured.

Revenue from the sale of hardware and software products is recognized when risk of loss and title have transferred. For most of the Company’s product sales, these criteria are met at the time the product is shipped or delivery has occurred. Revenue from distributors and system integrators is recognized on delivery of the related products, provided all other revenue recognition criteria have been met. The Company’s agreements with these distributors and system integrators have terms which are generally consistent with the standard terms and conditions for the sale of the Company’s equipment to end users, and do not provide for product rotation or pricing allowances, as are typically found in agreements with stocking distributors. The Company accrues for sales returns and other allowances based on probable customer returns.

Deferred revenue includes billings in excess of revenue recognized, net of deferred cost of revenue, and invoiced amounts remain deferred until applicable revenue recognition criteria are met.

Shipping and handling costs incurred for inventory purchases and product shipments are recorded in cost of revenue in the Company’s Consolidated Statements of Operations. Costs associated with services are generally recognized as incurred.

The Company recognizes revenue from the sale of hardware products and software bundled with hardware that is essential to the functionality of the hardware in accordance with applicable revenue recognition accounting guidance. For the sale of stand-alone software products, bundled with hardware but not essential to the functionality of the hardware, revenue is allocated between the hardware, including essential software and related elements, and the non-essential software and related elements. Revenue for the hardware and essential software elements are recognized under the relative allocation method. Revenue for the non-essential software and related elements are recognized under the residual method in accordance with software accounting guidance. Revenue associated with service and maintenance agreements is recognized on a straight-line basis over the period in which the services are performed, generally one year. The Company recognizes revenue associated with solution sales using the percentage of completion or completed contract methods of accounting. Further details of these accounting policies are described below.

Multiple Element Arrangements. The Company has revenue arrangements that include hardware and software essential to the hardware product’s functionality, and non-essential software, services and support. For transactions originating or materially modified, beginning January 1, 2011, the Company has applied the accounting guidance that requires the Company to allocate revenue to all deliverables based on their relative selling prices. For transactions originating prior to January 1, 2011, the Company applied software revenue recognition accounting guidance, as described in the “Software” section below. The Company determines the relative selling prices by first considering vendor-specific objective evidence of fair value (“VSOE”), if it exists; otherwise third-party evidence (“TPE”) of the selling price is used. If neither VSOE nor TPE exists for a deliverable, the Company uses a best estimate of the selling price (“BESP”) for that deliverable. Once revenue is allocated to all deliverables based on their relative selling prices, revenue related to hardware elements (hardware, essential software and related services) are recognized using a relative selling price allocation and non-essential software and related services are recognized under the residual method.

Harmonic has established VSOE for certain elements of its arrangements based on either historical stand-alone sales to third parties or stated renewal rates for maintenance. The Company has VSOE of fair value for maintenance, training and certain professional services.

TPE is determined based on competitor prices for similar deliverables when sold separately. The Company is typically not able to determine TPE for competitors’ products or services. Generally, the Company’s go-to-market strategy differs from that of its competitors’ and the Company’s offerings contain a significant level of differentiation, such that the comparable pricing of products with similar functionality cannot be obtained. Furthermore, the Company is unable to reliably determine what competitor similar products’ selling prices are on a stand-alone basis.

When the Company is unable to establish fair value of non-software deliverables using VSOE or TPE, the Company uses BESP in its allocation of arrangement consideration. The objective of using BESP is to determine the price at which the Company would transact a sale if the product or service were sold on a stand-alone basis. The Company determines BESP for a product or service by considering multiple factors, including, but not limited to, pricing practices, market conditions, competitive landscape, internal costs, geographies and gross margin. The determination of BESP is made through consultation with Company’s management, taking into consideration the Company’s go-to-market strategy.

Software. Sales of stand-alone software that are not considered essential to the functionality of the hardware continue to be subject to the software revenue recognition guidance.

In accordance with the software revenue recognition guidance, the Company applies the residual method to recognize revenue for the delivered elements in stand-alone software transactions. Under the residual method, the amount of revenue allocated to delivered elements equals the total arrangement consideration, less the aggregate fair value of any undelivered elements, typically maintenance, provided that vendor specific objective evidence (“VSOE”) of fair value exists for all undelivered elements. VSOE of fair value is based on the price charged when the element is sold separately or, in the case of maintenance, substantive renewal rates for maintenance.

Solution Sales. Solution sales for the design, manufacture, test, integration and installation of products, including equipment acquired from third parties to be integrated with Harmonic’s products, that are customized to meet the customer’s specifications are accounted for in accordance with applicable guidance on accounting for performance of construction/production contracts. Accordingly, for each arrangement that the Company enters into that includes both products and services, the Company performs a detailed evaluation to determine whether the arrangement should be accounted for under guidance for construction/production contracts or, alternatively, for arrangements that do not involve significant production, modification or customization, under other applicable accounting guidance. The Company has a long-standing history of entering into contractual arrangements to deliver the solution sales described.

At the outset of each arrangement accounted for as a single arrangement, the Company develops a detailed project plan and associated labor hour estimates for each project. The Company believes that, based on its historical experience, it has the ability to make labor cost estimates that are sufficiently dependable to justify the use of the percentage-of-completion method of accounting. Under the percentage-of-completion method, revenue recognized reflects the portion of the anticipated contract revenue that has been earned, equal to the ratio of actual labor hours expended to total estimated labor hours to complete the project. Costs are recognized proportionally to the labor hours incurred. For contracts that include customized services for which labor costs are not reasonably estimable, the Company uses the completed contract method of accounting. Under the completed contract method, 100% of the contract’s revenue and cost is recognized upon the completion of all services under the contract. If the estimated costs to complete a project exceed the total contract amount, indicating a loss, the entire anticipated loss is recognized.

Inventories

Inventories are stated at the lower of cost or market. Cost is computed using standard cost, which approximates actual cost, on a first-in, first-out basis. The cost of inventories is comprised of material, labor and manufacturing overhead. The Company’s manufacturing overhead standards for product costs are calculated assuming full absorption of forecasted spending over projected volumes. The Company establishes provisions for excess and obsolete inventories to reduce such inventories to their estimated net realizable value after evaluation of historical sales, future demand and market conditions, expected product life cycles and current inventory levels. Such provisions are charged to cost of revenue in the Company’s Consolidated Statements of Operations.

Capitalized Software Development Costs

Costs related to research and development are generally charged to expense as incurred. Capitalization of material software development costs begins when a product’s technological feasibility has been established. To date, the time period between achieving technological feasibility, which the Company has defined as the establishment of a working model, which typically occurs when beta testing commences, and the general availability of such software has been short, and, as such, software development costs qualifying for capitalization have been insignificant.

The Company incurs costs associated with developing software for internal use and for which no plan exists to market the software externally. The Company capitalizes the costs as part of property and equipment and recognizes the associated depreciation over the software’s estimated useful life of generally three years. Capitalized software costs for internal use have been insignificant in each of the periods presented.

Property and Equipment

Property and equipment are recorded at cost. Depreciation and amortization are computed using the straight-line method over the estimated useful lives of the assets. Estimated useful lives are five years for furniture and fixtures, three years for software developed for internal use and typically four years for machinery and equipment. Depreciation and amortization for leasehold improvements are computed using the shorter of the remaining useful lives of the assets, up to ten years, or the lease term of the respective assets.

Goodwill

Goodwill represents the difference between the purchase price and the estimated fair value of the identifiable assets acquired and liabilities assumed. The Company tests for goodwill impairment at the reporting unit level on an annual basis in the fourth quarter of each of its fiscal years, and at any other time at which events occur or circumstances indicate that the carrying amount of goodwill may exceed its fair value. The Company uses a two-step process to determine the amount of goodwill impairment. The first step requires comparing the fair value of the reporting unit to its net book value, including goodwill. A potential impairment exists if the fair value of the reporting unit is lower than its net book value. The second step of the process, which is performed only if a potential impairment exists, involves determining the difference between the fair value of the reporting unit’s net assets other than goodwill and the fair value of the reporting unit. If this difference is less than the net book value of goodwill, an impairment exists and is recorded.

In fiscal 2013, the Company performed goodwill impairment test as a single reporting unit. In fiscal 2014, due to a change in the Company’s reporting structure, the goodwill impairment is tested at its two reporting units, which are the same as the operating segments (see Note 17, “Segment Information, Geographic Information and Customer Concentration” for additional information on operating segments). Goodwill is assigned to the reporting units using the relative fair values of the reporting units and the fair values of the reporting units were determined utilizing a blend of the income approach and the market approach. There was no impairment of goodwill resulting from the Company’s fiscal 2015 annual impairment testing in the fourth quarter of 2015 (See Note 8, “Goodwill and Identified Intangible Assets” for additional information).

Long-lived Assets

Long-lived assets represent property and equipment and purchased intangible assets. Purchased intangible assets from business combinations and asset acquisitions include customer contracts, trademarks and trade names, and maintenance agreements and related relationships, the amortization of which is charged to general and administrative expenses, and core technology and developed technology, the amortization of which is charged to cost of revenue. The Company evaluates the recoverability of intangible assets and other long-lived assets when indicators of impairment are present. When impairment indicators are present, the Company evaluates the recoverability of intangible assets and other long-lived assets on the basis of undiscounted cash flows expected to result from the use of each asset group and its eventual disposition. If the undiscounted expected future cash flows are less than the carrying amount of the asset, an impairment loss is recognized in order to writedown the carrying value of the asset to its estimated fair market value.

In connection with restructuring actions initiated during 2014, the Company recorded a fixed assets impairment charge of $1.1 million in fiscal 2014 related to software development costs incurred for a discontinued project.

Foreign Currency

The functional currency of the Company’s Israeli, Cayman and Swiss operations is the U.S. dollar. All other foreign subsidiaries use the respective local currency as the functional currency. When the local currency is the functional currency, gains and losses from translation of these foreign currency financial statements into U.S. dollars are recorded as a separate component of other comprehensive loss in stockholders’ equity.

For subsidiaries where the functional currency is the U.S. dollar, monetary assets and liabilities denominated in currencies other than the U.S. dollar are remeasured into U.S. dollars using exchange rates prevailing on the balance sheet date. The remeasurement gains and losses are included in other income (expense), net in the Company’s Consolidated Statements of Operations. The Company recorded remeasurement losses of $0.5 million, $0.4 million and $0.5 million for the years ended December 31, 2015, 2014 and 2013, respectively.

Derivative Instruments

The Company enters into derivative instruments, primarily foreign currency forward contracts, to minimize the short-term impact of foreign currency exchange rate fluctuations on certain foreign currency denominated assets and liabilities as well as certain foreign currencies denominated expenses. The Company does not enter into derivative instruments for trading purposes and these derivatives generally have maturities within twelve months.

The derivative instruments are recorded at fair value in prepaid expenses and other current assets or accrued liabilities in the Company’s Consolidated Balance Sheet. For derivative instruments designated and qualifying as cash flow hedges of forecasted foreign currency denominated transactions expected to occur within twelve months, the effective portion of the gain or loss on these hedges is reported as a component of “Accumulated other comprehensive income (loss)” in stockholders’ equity, and is reclassified into earnings when the hedged transaction affects earnings. If the transaction being hedged fails to occur, or if a portion of any derivative is (or becomes) ineffective, the gain or loss on the associated financial instrument is recorded immediately in earnings. For derivative instruments used to hedge existing foreign currency denominated assets or liabilities, the gains or losses on these hedges are recorded immediately in earnings to offset the changes in the fair value of the assets or liabilities being hedged.

Fair Value of Financial Instruments

The carrying value of the Company’s financial instruments, including cash equivalents, restricted cash, short-term investments, accounts receivable, accounts payable and accrued liabilities, approximate fair value due to their short maturities.

Restructuring and Related Charges

The Company’s restructuring charges consist primarily of employee severance, one-time termination benefits related to the reduction of its workforce, lease exit costs, and other costs. Liabilities for costs associated with a restructuring activity are recognized when the liability is incurred and are measured at fair value. One-time termination benefits are expensed at the date the entity notifies the employee, unless the employee must provide future service, in which case the benefits are expensed ratably over the future service period. Termination benefits are calculated based on regional benefit practices and local statutory requirements. Costs to terminate a lease before the end of its term are recognized when the entity terminates the contract in accordance with the contract terms. The Company determines the excess facilities accrual based on expected cash payments, under the applicable facility lease, reduced by any estimated sublease rental income for such facility. Other costs primarily consist of costs to write down the values of inventories and leasehold improvement write-down as a result of restructuring activities (see Note 11, “Restructuring and Asset Impairment Charges” for additional information).

Warranty

The Company accrues for estimated warranty costs at the time of revenue recognition and records such accrued liabilities as part of cost of revenue. Management periodically reviews its warranty liability and adjusts the accrued liability based on the terms of warranties provided to customers, historical and anticipated warranty claims experience, and estimates of the timing and cost of warranty claims.

Advertising Expenses

All advertising costs are expensed as incurred and included in “Selling, general and administrative expenses” in the Company’s Consolidated Statements of Operations. Advertising expense was $1.4 million, $0.2 million and $0.4 million for the years ended December 31, 2015, 2014 and 2013, respectively.

Stock-based Compensation Expense

The Company measures and recognizes compensation expense for all stock-based compensation awards made to employees and directors, including stock options, restricted stock units and awards related to the Company’s Employee Stock Purchase Plan (“ESPP”), based upon the grant-date fair value of those awards.

Applicable accounting guidance requires companies to estimate the fair value of stock-based compensation awards on the date of grant. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service period in the Company’s Consolidated Statements of Operations.

The fair value of stock options is estimated at grant date using the Black-Scholes option pricing model. The Company’s determination of fair value of stock options on the date of grant, using an option pricing model, is affected by the Company’s stock price, as well as the assumptions regarding a number of highly complex and subjective variables. These variables include, but are not limited to, the Company’s expected stock price volatility over the term of the awards and projected employee stock option exercise behaviors. The fair value of each restricted stock unit grant is based on the underlying value of the Company’s common stock on the date of grant.

Income Taxes

In preparing the Company’s financial statements, the Company estimates the income taxes for each of the jurisdictions in which the Company operates. This involves estimating the Company’s actual current tax exposures and assessing temporary and permanent differences resulting from differing treatment of items, such as reserves and accruals, for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are included within the Company’s Consolidated Balance Sheet.

The Company’s income tax policy is to record the estimated future tax effects of temporary differences between the tax bases of assets and liabilities and amounts reported in the Company’s accompanying Consolidated Balance Sheets, as well as operating loss and tax credit carryforwards. The Company follows the guidelines set forth in the applicable accounting guidance regarding the recoverability of any tax assets recorded on the Consolidated Balance Sheet and provides any necessary allowances as required. Determining necessary allowances requires the Company to make assessments about the timing of future events, including the probability of expected future taxable income and available tax planning opportunities. A history of operating losses in recent years has led to uncertainty with respect to our ability to realize certain of our net deferred tax assets, and as a result we applied full valuation allowance against our U.S. net deferred tax assets as of December 31, 2015. In the event that actual results differ from these estimates or the Company adjusts these estimates in future periods, the Company’s operating results and financial position could be materially affected.

The Company is subject to examination of its income tax returns by various tax authorities on a periodic basis. The Company regularly assesses the likelihood of adverse outcomes resulting from such examinations to determine the adequacy of its provision for income taxes. The Company has applied the provisions of the applicable accounting guidance on accounting for uncertainty in income taxes, which requires application of a more-likely-than-not threshold to the recognition and de-recognition of uncertain tax positions. If the recognition threshold is met, the applicable accounting guidance permits the Company to recognize a tax benefit measured at the largest amount of tax benefit that, in the Company’s judgment, is more than 50% likely to be realized upon settlement. It further requires that a change in judgment related to the expected ultimate resolution of uncertain tax positions be recognized in earnings in the period of such change.

The Company files annual income tax returns in multiple taxing jurisdictions around the world. A number of years may elapse before an uncertain tax position is audited and finally resolved. While it is often difficult to predict the final outcome or the timing of resolution of any particular uncertain tax position, the Company believes that its reserves for income taxes reflect the most likely outcome. The Company adjusts these reserves and penalties, as well as the related interest, in light of changing facts and circumstances. Changes in the Company’s assessment of its uncertain tax positions or settlement of any particular position could materially and adversely impact the Company’s income tax rate, operating results, financial position and cash flows.

Segment Reporting

Operating segments are defined as components of an enterprise that engage in business activities for which separate financial information is available and is evaluated by the Chief Operating Decision Maker (“CODM”), which for the Company is its Chief Executive Officer, in deciding how to allocate resources and assess performance. Prior to the fourth quarter of 2014, the Company operated its business in one reportable segment. With effect from the fourth quarter of 2014, the Company changed its operating segments to align with how the CODM evaluates the financial information used to allocate resources and assess performance of the Company. The new reporting structure consists of two operating segments: Video and Cable Edge. All prior period segment information presented has been conformed to the new operating segments.

Comprehensive Income (Loss)

Comprehensive income (loss) includes net income (loss) and other comprehensive income (loss). Other comprehensive income (loss) includes cumulative translation adjustments, unrealized gains and losses on certain foreign currency forward contracts that qualify as cash flow hedges and available-for-sale securities.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) issued new authoritative guidance for revenue recognition, requiring an entity to recognize the amount of revenue that reflects the consideration to which it expects to be entitled for the transfer of promised goods or services to customers. The updated standard will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective and permits the use of either the retrospective or cumulative effect transition method. The original effective date for this new standard would have required the Company to adopt beginning in its first quarter of 2018. In August 2015, the FASB issued an accounting standard update for the deferral of the effective date by one year and permits early adoption, but not before the original effective date. Accordingly, the Company may adopt the standard in either its first quarter of 2018 or 2019. The new revenue standard may be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as of the date of adoption. The Company is currently evaluating the timing of its adoption and the impact of adopting the new revenue standard on its consolidated financial statements.

In November 2014, the FASB issued an accounting standard update for determining when separation of certain embedded derivative features in a hybrid financial instrument is required. An entity will continue to evaluate whether the economic characteristics and risks of the embedded derivative feature are clearly and closely related to those of the host contract, among other relevant criteria. The amendments clarify how current GAAP should be interpreted in evaluating the economic characteristics and risks of a host contract in a hybrid financial instrument that is issued in the form of a share. The accounting standard update will be effective for the Company beginning in the first quarter of fiscal 2016 and early adoption is permitted. The adoption of this accounting standard update will not impact the Company’s financial position, results of operations or cash flows.

In February 2015, the FASB issued an accounting standard update that changes the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. This accounting standard update will be effective for the Company beginning in the first quarter of fiscal 2016 and early adoption is permitted. The adoption of this new guidance is not expected to have a material impact on the Company’s consolidated financial statements.

In April 2015, the FASB issued an accounting standard update that requires debt issuance costs to be presented as a direct deduction from the carrying amount of the related debt liability, consistent with the presentation of debt discounts. Prior to this accounting update, debt issuance costs were required to be presented as deferred charge assets, separate from the related debt liability. This accounting standard update does not change the recognition and measurement requirements for debt issuance costs. The Company early-adopted this accounting standard update as of the end of its fiscal 2015 in connection with the convertible senior notes issued in December 2015 (see Note 12, “Convertible Notes and Credit Facilities”), resulting in the classification of $3.2 million of unamortized debt issuance costs as a deduction from long-term liability on its Consolidated Balance Sheet at December 31, 2015. Other than this transaction, the adoption of this accounting standard update did not have an impact on the Company’s consolidated financial statements.

In July 2015, the FASB issued an accounting standard update that requires inventory to be measured at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. This accounting standard update will be effective for the Company beginning in the first quarter of fiscal 2017 and early adoption is permitted. The Company is currently evaluating the impact of this accounting standard update on its consolidated financial statements.

In November 2015, the FASB issued an accounting standard update that all deferred tax assets and liabilities, along with any related valuation allowance, be classified as non-current on the balance sheet. The accounting standard update will be effective for the Company beginning in the first quarter of fiscal 2017 and early adoption is permitted. The Company early-adopted prospectively this accounting standard update as of the end of its fiscal 2015, resulting in $15.9 million of net deferred tax assets, along with its related valuation allowance, being classified as non-current on the Consolidated Balance Sheet as of December 31, 2015. Other than this reclassification, the adoption of this accounting standard update did not have an impact on the Company’s consolidated financial statements.

In January 2016, the FASB issued an accounting standard update which requires equity investments to be measured at fair value with changes in fair value recognized in net income and simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment. The accounting standard update also updates certain presentation and disclosure requirements. This accounting standard update will be effective for the Company beginning in the first quarter of fiscal 2018 and early adoption is permitted. The Company is currently evaluating the impact of this accounting standard update on its consolidated financial statements.

In February 2016, the FASB amends the existing accounting standard for lease accounting. Under this guidance, lessees and lessors should apply a “right-of-use” model in accounting for all leases (including subleases) and eliminate the concept of operating leases and off-balance sheet leases. This new leases standard requires a modified retrospective transition approach for all leases existing at, or entered into after, the date of initial application, with an option to use certain transition relief. The new standard will be effective for the Company beginning in the first quarter of fiscal 2019 and early adoption is permitted. The Company is currently evaluating the methods and impact of adopting the new leases standard on its consolidated financial statements.