| Significant Accounting Policies (Policies) | 12 Months Ended |
| Dec. 29, 2018 |
| Accounting Policies [Abstract] | |
| Use of Estimates | Use of Estimates The consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). These accounting principles require the Company to make certain estimates, assumptions and judgments that can affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the consolidated financial statements, as well as the reported amounts of revenue and expenses during the periods presented. Significant estimates, assumptions and judgments made by management include revenue recognition, stock-based compensation, inventory valuation, accrued warranty, business combinations and accounting for income taxes. Other estimates, assumptions and judgments made by management include restructuring and other related costs, allowances for sales returns, allowances for doubtful accounts, pension, useful life of acquired intangibles and recoverability of property, plant and equipment, fair value measurement of the liability component of the convertible senior notes, non-marketable equity investments and derivative instruments. Management believes that the estimates, assumptions and judgments upon which they rely are reasonable based upon information available to them at the time that these estimates and judgments are made. To the extent there are material differences between these estimates and actual results, the Company’s consolidated financial statements will be affected. |
| Revenue Recognition | Revenue Recognition Effective December 31, 2017, the Company adopted Accounting Standards Update No. 2014-09, "Revenue from Contracts with Customers (Topic 606)” (“Topic 606”), using the modified retrospective method applied to those contracts that were not completed as of December 31, 2017. Results for the reporting periods after December 31, 2017 are presented under Topic 606, while prior period amounts are not adjusted and continue to be reported in accordance with the Company’s historical accounting under Accounting Standards Codification (“ASC”) Topic 605, “Revenue Recognition” (“Topic 605”). The Company recognizes revenue when control of the promised goods or services is transferred to its customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. The Company determines revenue recognition by applying the following five-step approach: • identification of the contract, or contracts, with a customer; • identification of the performance obligations in the contract; • determination of the transaction price; • allocation of the transaction price to the performance obligations in the contract; and • recognition of revenue when, or as, the Company satisfies a performance obligation. Many of the Company's product sales are sold in combination with installation and deployment services along with initial hardware and software support. The Company's product sales are also sold at times with spares management, on-site hardware replacement services, network operations management, software subscription services, extended hardware warranty and training. Initial software and hardware support services are generally delivered over a one-year period in connection with the initial purchase. Software warranty provides customers with maintenance releases during the warranty support period and hardware warranty provides replacement or repair of equipment that fails to perform in line with specifications. Software subscription services include software warranty and additionally provides customers with rights to receive unspecified software product upgrades released during the support period. Spares management and on-site hardware replacement services include the replacement of defective units at customer sites in accordance with specified service level agreements. Network operations management includes the day-to-day operation of a customer's network. These services are generally delivered on an annual basis. The Company evaluates each promised good and service in a contract to determine whether it represents a distinct performance obligation or should be accounted for as a combined performance obligation. Services revenue includes software subscription services, installation and deployment services, spares management, on-site hardware replacement services, network operations management, extended hardware warranty and training. Revenue from software subscription services, spares management, on-site hardware replacement services, network operations management and extended hardware warranty contracts is deferred and is recognized ratably over the contractual support period, which is generally one year, as services are provided over the course of the entire period. Revenue related to training and installation and deployment services is recognized upon completion of the services. Contracts and customer purchase orders are generally used to determine the existence of an arrangement. In addition, shipping documents and customer acceptances, when applicable, are used to verify delivery and transfer of title. The Company typically satisfies its performance obligations upon shipment or delivery of product depending on the contractual terms. Payment terms to customers generally range from net 30 to 120 days from invoice, which are considered to be standard payment terms. The Company assesses its ability to collect from its customers based primarily on the creditworthiness and past payment history of the customer. Customer product returns are generally approved on a case by case basis. Specific reserve provisions are made based upon a specific review of all the approved product returns where the customer has yet to return the products to generate the related sales return credit at the end of a period. Estimated sales returns are recorded as a reduction to revenue. For sales to resellers, the same revenue recognition criteria apply. It is the Company’s practice to identify an end-user prior to shipment to a reseller. The Company does not offer rights of return or price protection to its resellers. The Company reports revenue net of any required taxes collected from customers and remitted to government authorities, with the collected taxes recorded as current liabilities until remitted to the relevant government authority. Customer Purchase Commitments The Company sells software licenses that provide customers the ability to purchase incremental bandwidth capacity on an already-deployed piece of hardware. Infinera Instant Bandwidth (“IB”) enabled systems generally include a specific initial capacity and incremental capacity can be added by the purchase of IB licenses. IB licenses are considered distinct performance obligations because customers can provision additional transmission capacity on demand without the deployment of any incremental equipment. Some contracts commit the customer to purchase incremental IB licenses within a specified time frame from the initial shipment of the IB enabled hardware. The time frame varies by customer and generally ranges between 12 to 24 months. If the customer does not purchase the additional capacity within the time frame as stated in the contract, the Company has the right to deliver and invoice such IB licenses to the customer. Under ASC 605, the additional incremental licenses were not included as an element of the initial arrangement because fees for the future purchases were not fixed. Under Topic 606, future committed licenses are considered to be additional performance obligations when a minimum purchase obligation is present, as evidenced by enforceable rights and obligations. As such, the Company is required to estimate the variable consideration for future IB licenses as part of determining the contract transaction price. Contract Termination Rights The contract term is determined on the basis of the period over which the parties to the contract have present enforceable rights and obligations. Certain customer contracts include a termination for convenience clause that allows the customer to terminate services without penalty, upon advance notification. For such contracts, the service duration is limited to the non-cancellable portion of the contract. Variable Consideration The consideration associated with customer contracts is generally fixed. Variable consideration includes discounts, rebates, refunds, credits, incentives, penalties, or other similar items. The amount of consideration that can vary is not a substantial portion of total consideration . Variable consideration estimates are re-assessed at each reporting period until a final outcome is determined. The changes to the original transaction price due to a change in estimated variable consideration will be applied on a retrospective basis, with the adjustment recorded in the period in which the change occurs. Stand-alone Selling Price Stand-alone selling price is the price at which an entity would sell a good or service on a stand-alone (or separate) basis at contract inception. Under this model, the observable price of a good or service sold separately provides the best evidence of stand-alone selling price. However, in certain situations, stand-alone selling prices will not be readily observable and the entity must estimate the stand-alone selling price. When allocating on a relative stand-alone selling price basis, any discount provided in the contract is generally allocated proportionately to all of the performance obligations in the contract. The majority of products and services offered by the Company have readily observable selling prices. For products and services that do not, the Company generally estimates stand-alone selling price using the market assessment approach based on expected selling price and adjust those prices as necessary to reflect the Company’s costs and margins. As part of its stand-alone selling price policy, the Company reviews product pricing on a periodic basis to identify any significant changes and revise its expected stand-alone selling price assumptions as appropriate. Shipping and Handling The Company treats shipping and handling activities as costs to fulfill the Company's promise to transfer products. Shipping and handling fees billed to customers are recorded as a reduction to cost of product. Capitalization of Costs to Obtain a Contract The Company has assessed the treatment of costs to obtain or fulfill a contract with a customer. Sales commissions have historically been expensed as incurred. Under Topic 606, the Company capitalizes sales commissions related to multi-year service contracts, which are paid for upfront, and amortizes the asset over the period of benefit, which is the service period. Sales commissions paid on service contract renewals, are commensurate with the sales commissions paid on the initial contracts. Transaction Price Allocated to the Remaining Performance Obligation The Company’s remaining performance obligations represent the transaction price allocated to performance obligations that are unsatisfied or partially satisfied as of period end, consisting of deferred revenue and backlog. The Company’s backlog represents purchase orders received from customers for future product shipments and services that are unsatisfied or partially satisfied as of period end. The Company’s backlog is subject to future events that could cause the amount or timing of the related revenue to change, and, in certain cases, may be canceled without penalty. Orders in backlog may be fulfilled several quarters following receipt or may relate to multi-year support service obligations. |
| Stock-Based Compensation | Stock-Based Compensation Stock-based compensation cost is measured at the grant date based on the fair value of the award and is recognized as expense over the requisite service period (generally the vesting period) under the straight-line amortization method. The expected forfeiture rate is estimated based on the Company's historical forfeiture data and compensation costs are recognized only for those equity awards expected to vest. The estimation of the forfeiture rate required judgment, and to the extent actual forfeitures differed from expectations, changes in estimate are recorded as an adjustment in the period when such estimates are revised. The Company historically recorded stock-based compensation expense by applying the forfeiture rates and adjusted estimated forfeiture rates to actual. During the third fiscal quarter beginning on June 26, 2016, the Company elected to early adopt ASU 2016-09 and elected to change its accounting policy to account for forfeitures when they occur on a modified retrospective basis. The Company makes a number of estimates and assumptions in determining stock-based compensation related to stock options including the following: • The expected term represents the weighted-average period that the stock options are expected to be outstanding prior to being exercised. The expected term is estimated based on the Company’s historical data on employee exercise patterns and post vesting termination behavior to estimate expected exercises over the contractual term of grants. • Expected volatility of the Company’s stock is based on the weighted-average implied and historical volatility of the Company. The Company estimates the fair value of the rights to acquire stock under its 2007 Employee Stock Purchase Plan (the “ESPP”) using the Black-Scholes option pricing formula. The ESPP provides for consecutive six-month offering periods and the Company uses its own historical volatility data in the valuation of shares that are purchased under the ESPP. The Company accounts for the fair value of restricted stock units (“RSUs”) using the closing market price of the Company’s common stock on the date of grant. For new-hire grants, RSUs typically vest ratably on an annual basis over four years . For annual refresh grants, RSUs typically vest ratably on an annual basis over three or four years. The Company granted performance stock units (“PSUs”) to its executive officers and senior management in 2016, 2017 and 2018 as part of the Company's annual refresh grant process. These PSUs entitle the Company's executive officers and senior management to receive a number of shares of the Company's common stock based on its stock price performance compared to a specified target composite index for the same period. These PSUs vest over the span of one year , two years and three years , and the number of shares to be issued upon vesting ranges from zero to two times the number of PSUs granted depending on the relative performance of the Company's common stock price compared to the targeted composite index. This performance metric is classified as a market condition. The Company uses a Monte Carlo simulation model to determine the fair value of PSUs on the date of grant. The Monte Carlo simulation model is based on a discounted cash flow approach, with the simulation of a large number of possible stock price outcomes for the Company's stock and the target composite index. The use of the Monte Carlo simulation model requires the input of a number of assumptions including expected volatility of the Company's stock price, expected volatility of target composite index, correlation between changes in the Company's stock price and changes in the target composite index, risk-free interest rate, and expected dividends as applicable. Expected volatility of the Company's stock is based on the weighted-average historical volatility of its stock. Expected volatility of target composite index is based on the historical and implied data. Correlation is based on the historical relationship between the Company's stock price and the target composite index average. The risk-free interest rate is based upon the treasury zero-coupon yield appropriate for the term of the PSU as of the grant date. The expected dividend yield is zero for the Company as it does not expect to pay dividends in the future. The expected dividend yield for the target composite index is the annual dividend yield expressed as a percentage of the composite average of the target composite index on the grant date. In addition, the Company has granted other PSUs to certain employees that only vest upon the achievement of specific operational performance criteria. The Company assesses the achievement status of these PSUs on a quarterly basis and records the related stock-based compensation expenses based on the estimated achievement payout. |
| Employee Benefit and Pension Plans | Employee Benefit and Pension Plans The Company operates a number of post-employment plans in Germany, as well as smaller post-employment plans in other countries, including both defined contribution and defined benefit plans. Benefit cost and obligations pertaining to these plans are based on assumptions for the discount rate, expected return on plan assets, mortality rates, expected salary increases, health care cost trend rates and attrition rates. The discount rate assumption is based on current investment yields of high-quality fixed-income securities with maturities similar to the expected benefits payment period. Mortality rates help predict the expected life of plan participants. The expected increase in the compensation levels assumption reflects the Company's actual experience and future expectations. The expected long-term return on plan assets is determined based on asset allocations, historical portfolio results, historical asset correlations and management’s expected returns for each asset class. The Company evaluates its expected return assumptions annually including reviewing current capital market assumptions to assess the reasonableness of the expected long-term return on plan assets. The Company updates the expected long-term return on assets when the Company observes a sufficient level of evidence that would suggest the long-term expected return has changed. |
| Research and Development | Research and Development All costs to develop the Company’s hardware products are expensed as incurred. Software development costs are capitalized beginning when a product’s technological feasibility has been established and ending when a product is available for general release to customers. Generally, the Company’s software products are released soon after technological feasibility has been established. As a result, costs subsequent to achieving technological feasibility have not been significant and all software development costs have been expensed as incurred. |
| Advertising | Advertising All advertising costs are expensed as incurred. |
| Accounting for Income Taxes | Accounting for Income Taxes On December 22, 2017, the Securities and Exchange Commission (the “SEC”) staff issued Staff Accounting Bulletin No. 118, “Income Tax Accounting Implications of the Tax Cuts and Jobs Act” (“SAB 118”) to address the application of U.S. GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the U.S. Tax Cuts and Jobs Act (the “Tax Act”). The Company determined an adjustment to deferred tax assets, along with a corresponding adjustment to valuation allowance, was needed. The adjustment resulted in no tax expense impact in connection with the re-measurement of certain deferred tax assets and liabilities from 35% to 21%. Additionally, the Company provisionally recorded no tax expense in connection with the transition tax on the mandatory deemed repatriation of foreign earnings, based upon an aggregate tax loss of its foreign subsidiaries for the year ended December 30, 2017. The Company finalized its accounting for the re-measurement of deferred tax balances and transition tax with no adjustment to income tax expense for the year ended December 29, 2018. As part of the process of preparing the Company's consolidated financial statements, it is required to estimate its taxes in each of the jurisdictions in which it operates. The Company estimates actual current tax expense together with assessing temporary differences resulting from different treatment of items, such as accruals and allowances not currently deductible for tax purposes. These differences result in deferred tax assets and liabilities, which are included in its consolidated balance sheets. In general, deferred tax assets represent future tax benefits to be received when certain expenses previously recognized in its consolidated statements of operations become deductible expenses under applicable income tax laws or loss, or credit carryforwards are utilized. Accordingly, realization of the Company's deferred tax assets is dependent on future taxable income within the respective jurisdictions against which these deductions, losses and credits can be utilized within the applicable future periods. The Company must assess the likelihood that some portion or all of its deferred tax assets will be recovered from future taxable income within the respective jurisdictions, and to the extent the Company believes that recovery does not meet the “more-likely-than-not” standard, it must establish a valuation allowance. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management judgment is required in determining its provision for income taxes, its deferred tax assets and liabilities and any valuation allowance recorded against its net deferred tax assets. In evaluating the need for a full or partial valuation allowance, all positive and negative evidence must be considered, including the Company's forecasts of taxable income over the applicable carryforward periods, its current financial performance, its market environment, and other factors. Based on the available objective evidence, at December 29, 2018, management believes it is not more likely than not that the domestic net deferred tax assets will be realizable in the foreseeable future. Accordingly, the domestic net deferred tax assets are subject to a full valuation allowance. To the extent that the Company determines that deferred tax assets are realizable on a more likely than not basis, and an adjustment is needed, that adjustment will be recorded in the period that the determination is made. |
| Foreign Currency Translation and Transactions | Foreign Currency Translation and Transactions The Company considers the functional currencies of its foreign subsidiaries to be the local currency. Assets and liabilities recorded in foreign currencies are translated at the exchange rate as of the balance sheet date, and costs and expenses are translated at average exchange rates in effect during the period. Equity transactions are translated using historical exchange rates. The effects of foreign currency translation adjustments are recorded as a separate component of accumulated other comprehensive income (loss) in the accompanying consolidated balance sheets. For all non-functional currency account balances, the re-measurement of such balances to the functional currency will result in either a foreign exchange transaction gain or loss, which is recorded to other gain (loss), net, in the same period that the re-measurement occurred. Aggregate foreign exchange transactions recorded in 2018, 2017 and 2016 were losses of $2.5 million , $0.3 million and $1.8 million , respectively. The Company enters into foreign currency exchange forward contracts to reduce the impact of foreign exchange fluctuations on earnings from accounts receivable balances denominated in euros and British pounds, and restricted cash denominated in euros. The Company also enters into foreign currency exchange contracts to reduce the volatility of cash flows primarily related to forecasted revenues and expenses denominated in euros, British pounds and Swedish kronor (“SEK”). The contracts are generally settled for U.S. dollars, euros and British pounds at maturity under an average rate method agreed to at inception of the contracts. The gains and losses on these foreign currency derivatives are recorded to the consolidated statement of operations line item, in the current period, to which the item that is being economically hedged is recorded. |
| Cash, Cash Equivalents and Short-term and Long-term Investments | Cash, Cash Equivalents and Short-term and Long-term Investments The Company considers all highly liquid instruments with an original maturity at the date of purchase of 90 days or less to be cash equivalents. These instruments may include cash, money market funds, commercial paper and U.S. treasuries. The Company also maintains a portion of its cash in bank deposit accounts which, at times, may exceed federally insured limits. The Company has not experienced any losses in such accounts. Cash, cash equivalents and short-term investments consist of highly-liquid investments in certificates of deposits, money market funds, commercial paper, U.S. agency notes, corporate bonds and U.S. treasuries. Long-term investments primarily consist of certificates of deposits, commercial paper, U.S. agency notes, corporate bonds and U.S. treasuries. The Company considers all debt instruments with original maturities at the date of purchase greater than 90 days and remaining time to maturity of one year or less to be short-term investments. The Company classifies debt instruments with remaining maturities greater than one year as long-term investments, unless the Company intends to settle its holdings within one year or less and in such case it is considered to be short-term investments. The Company determines the appropriate classification of its marketable securities at the time of purchase and re-evaluates such designations as of each balance sheet date. Available-for-sale investments are stated at fair market value with unrealized gains and losses recorded in accumulated other comprehensive income (loss) in the Company’s consolidated balance sheets. The Company evaluates its available-for-sale marketable debt securities for other-than-temporary impairments and records any credit loss portion in other income (expense), net, in the Company’s consolidated statements of operations. The amortized cost of debt securities is adjusted for amortization of premiums and accretion of discounts to maturity and for any credit losses incurred on these securities. Gains and losses are recognized when realized in the Company’s consolidated statements of operations under the specific identification method. |
| Fair Value Measurement | Fair Value Measurement Pursuant to the accounting guidance for fair value measurements and its subsequent updates, fair value is defined as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required or permitted to be recorded at fair value, the Company considers the principal or most advantageous market in which it would transact and it considers assumptions that market participants would use when pricing the asset or liability. Valuation techniques used by the Company are based upon observable and unobservable inputs. Observable or market inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s assumptions about market participant assumptions based on the best information available. Observable inputs are the preferred source of values. These two types of inputs create the following fair value hierarchy: Level 1 – Quoted prices in active markets for identical assets or liabilities. Level 2 – Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 – Prices or valuations that require management inputs that are both significant to the fair value measurement and unobservable. The Company measures its cash equivalents, foreign currency exchange forward contracts, and debt securities at fair value and classifies its securities in accordance with the fair value hierarchy on a recurring basis. The Company’s money market funds and U.S. treasuries are classified within Level 1 of the fair value hierarchy and are valued based on quoted prices in active markets for identical securities. The Company classifies the following assets within Level 2 of the fair value hierarchy as follows: Certificates of Deposit The Company reviews market pricing and other observable market inputs for the same or similar securities obtained from a number of industry standard data providers. In the event that a transaction is observed for the same or similar security in the marketplace, the price on that transaction reflects the market price and fair value on that day. In the absence of any observable market transactions for a particular security, the fair market value at period end would be equal to the par value. These inputs represent quoted prices for similar assets or these inputs have been derived from observable market data. Commercial Paper The Company reviews market pricing and other observable market inputs for the same or similar securities obtained from a number of industry standard data providers. In the event that a transaction is observed for the same or similar security in the marketplace, the price on that transaction reflects the market price and fair value on that day and then follows a revised accretion schedule to determine the fair market value at period end. In the absence of any observable market transactions for a particular security, the fair market value at period end is derived by accreting from the last observable market price. These inputs represent quoted prices for similar assets or these inputs have been derived from observable market data accreted mathematically to par. U.S. Agency Notes The Company reviews trading activity and pricing for its U.S. agency notes as of the measurement date. When sufficient quoted pricing for identical securities is not available, the Company uses market pricing and other observable market inputs for similar securities obtained from a number of industry standard data providers. These inputs represent quoted prices for similar assets in active markets or these inputs have been derived from observable market data. Corporate Bonds The Company reviews trading activity and pricing for each of the corporate bond securities in its portfolio as of the measurement date and determines if pricing data of sufficient frequency and volume in an active market exists in order to support Level 1 classification of these securities. If sufficient quoted pricing for identical securities is not available, the Company obtains market pricing and other observable market inputs for similar securities from a number of industry standard data providers. In instances where multiple prices exist for similar securities, these prices are used as inputs into a distribution-curve to determine the fair market value at period end. Foreign Currency Exchange Forward Contracts As discussed in Note 5, “Derivative Instruments" to the Notes to Consolidated Financial Statements, the Company mainly holds non-speculative foreign exchange forward contracts to hedge certain foreign currency exchange exposures. The Company estimates the fair values of derivatives based on quoted market prices or pricing models using current market rates. Where applicable, these models project future cash flows and discount the future amounts to a present value using market-based observable inputs including interest rate curves, credit risk, foreign exchange rates, and forward and spot prices for currencies. Pension As a result of the Acquisition, the Company acquired a number of post-employment plans in Germany, as well as a number of smaller post-employment plans in other countries, including both defined contribution and defined benefit plans. The defined benefit plans expose the Company to actuarial risks such as investment risk, interest rate risk, life expectancy risk and salary risk. The characteristics of the defined benefit plans and the risks associated with them vary depending on legal, fiscal, and economic requirements. The Company classifies the following assets and liabilities within Level 3 of the fair value hierarchy and applies fair value accounting on a non-recurring basis, only if impairment is indicated: Facilities-related Charges The Company estimates the fair value of its facilities-related charges associated with the 2017 Restructuring Plan (as defined in Note 9, “Restructuring and Other Related Costs” to the Notes to Consolidated Financial Statements), based on estimated future discounted cash flows and unobservable inputs, which included the amount and timing of estimated sublease rental receipts that the Company could reasonably obtain over the remaining lease term and the discount rate. Non-marketable Equity Investment Beginning the first quarter of 2018, the Company adopted Accounting Standards Update No. 2016-01, “Financial Instruments (Topic 825): Recognition and Measurement of Financial Assets and Financial Liabilities” (“ASU 2016-01”), which requires equity investments to be measured at fair value with changes in fair value recognized in net income. As a result of adopting this new standard, the Company's non-marketable equity securities formerly classified as cost-method investments are now measured and recorded using the measurement alternative. Equity securities measured and recorded using the measurement alternative are recorded at cost minus impairment, if any, plus or minus changes resulting from qualifying observable price changes. Adjustments resulting from impairments and qualifying observable price changes are recorded in other income (expense), net, in the accompanying consolidated statements of operations. No initial adoption adjustment was recorded for these instruments since the standard was required to be applied prospectively for securities measured using the measurement alternative. These analyses require management to make assumptions and estimates regarding industry and economic factors, future operating results and discount rates. The Company regularly evaluates the carrying value of its equity investment for impairment. When a qualitative assessment indicates that impairment exists, the Company measures the investment at fair value. |
| Accounts Receivable and Allowances for Doubtful Accounts | Accounts Receivable and Allowances for Doubtful Accounts Accounts receivable are recorded at the invoiced amount and do not bear interest. The Company reviews its aging by category to identify significant customers or invoices with known dispute or collectability issues. The Company makes judgments as to its ability to collect outstanding receivables based on various factors including ongoing customer credit evaluations and historical collection experience. The Company provides an allowance for receivable amounts that are potentially uncollectible and when receivables are determined to be uncollectible, amounts are written off. |
| Allowances for Sales Returns | Allowances for Sales Returns Customer product returns are approved on a case by case basis. Specific reserve provisions are made based upon a specific review of all the approved product returns where the customer has yet to return the products to generate the related sales return credit at the end of a period. Estimated sales returns are provided for as a reduction to revenue. |
| Concentration of Risk | Concentration of Risk Financial instruments that are potentially subject to concentrations of credit risk consist primarily of cash equivalents, short-term investments, long-term investments and accounts receivable. Investment policies have been implemented that limit investments to investment-grade securities. The risk with respect to accounts receivable is mitigated by ongoing credit evaluations that the Company performs on its customers. As the Company continues to expand its sales internationally, it may experience increased levels of customer credit risk associated with those regions. Collateral is generally not required for accounts receivable but may be used in the future to mitigate credit risk associated with customers located in certain geographical regions. As of December 29, 2018, no customers accounted for over 10% of the Company's net accounts receivable balance. As of December 30, 2017, two customers accounted for over 10% of the Company's net accounts receivable balance. One customer accounted for approximately 11% of the Company's net accounts receivable balance, and another customer, which completed a merger in late 2017, was a combination of two of the Company's historically larger customers, accounted for approximately 16% of the Company's net accounts receivable balance. To date, a few of the Company’s customers have accounted for a significant portion of its revenue. One customer accounted for approximately 15% of the Company's revenue in 2018. One other customer, which completed a merger in late 2017 as mentioned above, was a combination of two of the Company's historically larger customers who merged in 2017 and accounted for approximately 13% and 18% of the Company's revenue in 2018 and 2017, respectively. These two historically larger customers each individually accounted for approximately 16% and 8% of the Company's revenue in 2016, respectively. No other customers accounted for over 10% of the Company's revenue for 2017 or 2016. The Company depends on sole source or limited source suppliers for several key components and raw materials. The Company generally purchases these sole source or limited source components and raw materials through standard purchase orders and does not have long-term contracts with many of these limited-source suppliers. While the Company seeks to maintain sufficient reserve stock of such components and raw materials, the Company’s business and results of operations could be adversely affected if any of its sole source or limited source suppliers suffer from capacity constraints, lower than expected yields, deployment delays, work stoppages or any other reduction or disruption in output. |
| Derivative Instruments | Derivative Instruments The Company is exposed to foreign currency exchange rate fluctuations in the normal course of its business. As part of its risk management strategy, the Company uses derivative instruments, specifically forward contracts, to reduce the impact of foreign exchange fluctuations on earnings. The forward contracts are with one high-quality institution and the Company monitors the creditworthiness of the counter parties consistently. The Company’s objective is to offset gains and losses resulting from these exposures with gains and losses on the derivative contracts used to hedge them, thereby reducing volatility of earnings or protecting fair values of assets. None of the Company’s derivative instruments contain credit-risk related contingent features, any rights to reclaim cash collateral or any obligation to return cash collateral. The Company does not have any leveraged derivatives. The Company does not use derivative contracts for trading or speculative purposes. The Company enters into foreign currency exchange forward contracts to manage its exposure to fluctuations in foreign exchange rates that arise primarily from its euro and British pound denominated receivables and euro denominated restricted cash balance amounts that are pledged as collateral for certain standby letters of credit. Gains and losses on these contracts are intended to offset the impact of foreign exchange rate changes on the underlying foreign currency denominated accounts receivables and restricted cash, and therefore, do not subject the Company to material balance sheet risk. The Company also enters into foreign currency exchange contracts to reduce the volatility of cash flows primarily related to forecasted revenues and expenses denominated in euros, British pounds and SEK. These contracts are generally settled for U.S. dollars, euros and British pounds at maturity under an average rate method agreed to at inception of the contracts. The forward contracts are with one high-quality institution and the Company consistently monitors the creditworthiness of the counterparty. The Company has entered into factoring agreements, to sell certain receivables to unrelated third-party financial institutions. These transactions are accounted for in accordance with Accounting Standards Codification Topic 860, “Transfers and Servicing” (“ASC 860”). ASC 860 and result in a reduction in accounts receivable because the agreements transfer effective control over and risk related to the receivables to the buyers. The Company's factoring agreements do not allow for recourse in the event of uncollectibility, and the Company does not retain any interest in the underlying accounts receivable once sold. |
| Inventory Valuation | Inventory Valuation Inventories consist of raw materials, work-in-process and finished goods and are stated at standard cost adjusted to approximate the lower of actual cost or net realizable value. Costs are recognized utilizing the first-in, first-out method. Net realizable value is based upon an estimated selling price reduced by the estimated cost of disposal. The determination of market value involves numerous judgments including estimated average selling prices based upon recent sales volumes, industry trends, existing customer orders, current contract price, future demand and pricing and technological obsolescence of the Company’s products. Inventory that is obsolete or in excess of the Company’s forecasted demand or is anticipated to be sold at a loss is written down to its estimated net realizable value based on historical usage and expected demand. In valuing its inventory costs and deferred inventory costs, the Company considered whether the net realizable value of inventory delivered or expected to be delivered at less than cost, primarily comprised of common equipment, had declined. The Company concluded that, in the instances where the net realizable value of inventory delivered or expected to be delivered was less than cost, it was appropriate to value the inventory costs and deferred inventory costs at cost or net realizable value, whichever is lower, thereby recognizing the cost of the reduction in net realizable value of inventory in the period in which the reduction occurred or can be reasonably estimated. The Company has, therefore, recognized inventory write-downs as necessary in each period in order to reflect inventory at the lower of actual cost or net realizable value. The Company considers whether it should accrue losses on firm purchase commitments related to inventory items. Given that the net realizable value of common equipment is below contractual purchase price, the Company has also recorded losses on these firm purchase commitments in the period in which the commitment is made. When the inventory parts related to these firm purchase commitments are received, that inventory is recorded at the purchase price less the accrual for the loss on the purchase commitment. |
| Property, Plant and Equipment | Property, Plant and Equipment Property, plant and equipment are stated at cost. This includes enterprise-level business software that the Company customizes to meet its specific operational needs. Depreciation is calculated using the straight-line method over the estimated useful lives of the respective assets. Leasehold improvements are amortized using the straight-line method over the shorter of the lease term or estimated useful life of the asset. An assumption of lease renewal where a renewal option exists is used only when the renewal has been determined to be reasonably assured. Repair and maintenance costs are expensed as incurred. The estimated useful life for each asset category is as follows: Estimated Useful Lives Building 20 to 41 years Laboratory and manufacturing equipment 1.5 to 10 years Furniture and fixtures 3 to 10 years Computer hardware and software 1.5 to 7 years Leasehold and building improvements 1 to 10 years The Company reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of these assets may not be recoverable or that the useful life is shorter than originally estimated. If impairment indicators are present and the projected future undiscounted cash flows are less than the carrying value of the assets, the carrying values are reduced to the estimated fair value. If assets are determined to be recoverable, but the useful lives are shorter than originally estimated, the carrying value of the assets is depreciated over the newly determined remaining useful lives. |
| Accrued Warranty | Accrued Warranty The Company warrants that its products will operate substantially in conformity with product specifications. Hardware warranties provide the purchaser with protection in the event that the product does not perform to product specifications. During the warranty period, the purchaser’s sole and exclusive remedy in the event of such defect or failure to perform is limited to the correction of the defect or failure by repair, refurbishment or replacement, at the Company’s sole option and expense. The Company's hardware warranty periods generally range from one to five years from date of acceptance for hardware and the Company's software warranty is 90 days. Upon delivery of the Company's products, the Company provides for the estimated cost to repair or replace products that may be returned under warranty. The hardware warranty accrual is based on actual historical returns and cost of repair experience and the application of those historical rates to the Company's in-warranty installed base. The provision for warranty claims fluctuates depending upon the installed base of products and the failure rates and costs of repair associated with these products under warranty. Furthermore, the Company's costs of repair vary based on repair volume and its ability to repair, rather than replace, defective units. In the event that actual product failure rates and costs to repair differ from the Company's estimates, revisions to the warranty provision are required. In addition, from time to time, specific hardware warranty accruals may be made if unforeseen technical problems arise with specific products. The Company regularly assesses the adequacy of its recorded warranty liabilities and adjusts the amounts as necessary. |
| Business Combination | Business Combination Accounting for acquisitions requires the Company's management to estimate the fair value of the assets and liabilities assumed, which requires management to make significant estimates, judgments, and assumptions that could materially affect the timing or amounts recognized in its financial statements. These assumptions and estimates include the Company’s use of the asset and the appropriate discount rates. The Company’s significant estimates can include, but are not limited to, the future cash flows, the appropriate weighted cost of capital, and discount rates, as well as the estimated useful life of intangible assets, deferred tax assets and liabilities, uncertain tax positions, and tax-related valuation allowance, which are initially estimated as of the acquisition date. While the Company uses its best estimates and assumptions to accurately value assets acquired and liabilities assumed at the acquisition date, the estimates are inherently uncertain and subject to refinement. In addition, unanticipated events and circumstances may occur that may affect the accuracy or validity of such estimates. As a result, during the measurement period, which may be up to one year following the acquisition date, if new information is obtained about facts and circumstances that existed as of the acquisition date, the Company may record adjustments to the fair value of these assets and liabilities, with the corresponding offset to goodwill. |
| Amortization of Intangible Assets | Amortization of Intangible Assets Intangible assets with finite lives are carried at cost, less accumulated amortization. Amortization is computed over the estimated useful lives of the respective assets. In-process research and development represents the fair value of incomplete research and development projects that have not reached technological feasibility as of the date of acquisition. Initially, these assets are not subject to amortization. Once projects have been completed they are transferred to developed technology, which are subject to amortization, while assets related to projects that have been abandoned are impaired and expensed to research and development. |
| Impairment of Intangible Assets and Goodwill | mpairment of Intangible Assets and Goodwill Goodwill is evaluated for impairment on an annual basis in the fourth quarter of the Company's fiscal year, and whenever events or changes in circumstances indicate the carrying amount of goodwill may not be recoverable. The Company has elected to first assess qualitative factors to determine whether it is more likely than not that the fair value of its single reporting unit is less than its carrying amount. If the Company determines that it is more likely than not that the fair value of its single reporting unit is less than its carrying amount, then the two-step goodwill impairment test will be performed. The first step, identifying a potential impairment, compares the fair value of its single reporting unit with its carrying amount. If the carrying amount exceeds its fair value, the second step will be performed; otherwise, no further step is required. The second step, measuring the impairment loss, compares the implied fair value of the goodwill with the carrying amount of the goodwill. Any excess of the goodwill carrying amount over the implied fair value is recognized as an impairment loss. The Company evaluates events and changes in circumstances that could indicate carrying amounts of purchased intangible assets may not be recoverable. When such events or changes in circumstances occur, the Company assesses the recoverability of these assets by determining whether or not the carrying amount will be recovered through undiscounted expected future cash flows. If the total of the future undiscounted cash flows is less than the carrying amount of an asset, the Company records an impairment loss for the amount by which the carrying amount of the asset exceeds the fair value of the asset. |
| Restructuring and Other Related Costs | Restructuring and Other Related Costs The Company records costs associated with exit activities related to restructuring plans in accordance with ASC 420, “Exit or Disposal Cost Obligations.” Liabilities for costs associated with an exit or disposal activity are recognized in the period in which the liability is incurred. The timing of the associated cash payments is dependent upon the type of exit cost and extends over an approximately four -year period. The Company records restructuring cost liabilities in “Accrued Expenses” and "Other Long-term Liabilities" in the Consolidated Balance Sheet. Restructuring costs include termination costs, facility consolidation and closure costs, equipment write-downs and inventory write-downs. One-time termination benefits are recognized as a liability at estimated fair value when the approved plan of termination has been communicated to employees, unless employees must provide future service, in which case the benefits are recognized ratably over the future service period. Ongoing termination benefits arrangements are recognized as a liability at estimated fair value when the amount of such benefits becomes estimable and payment is probable. For the facility-related restructuring costs, the Company recognizes a liability upon exiting all or a portion of a leased facility and meeting cease-use and other requirements. The amount of restructuring costs is based on the fair value of the lease obligation for the abandoned space, which includes a sublease assumption that could be reasonably obtained. Restructuring charges require significant estimates and assumptions, including sublease income and expenses for severance and other employee separation costs. Management estimates involve a number of risks and uncertainties, some of which are beyond control, including future real estate market conditions and the Company's ability to successfully enter into subleases or termination agreements with terms as favorable as those assumed when arriving at its estimates. The Company monitors these estimates and assumptions on at least a quarterly basis for changes in circumstances and any corresponding adjustments to the accrual are recorded in its statement of operations in the period when such changes are known. |
| Recent Accounting Pronouncements/Accounting Pronouncements Not Yet Effective | ecent Accounting Pronouncements In December 2017, the SEC staff issued SAB 118, which allowed the Company to record provisional amounts during a measurement period not to extend beyond one year of the enactment date. In March 2018, the Financial Accounting Standards Board (the “FASB”) issued ASU 2018-05, “Amendments to SEC Paragraphs Pursuant to SAB 118” and added such SEC guidance to Accounting Standards Codification 740, “Income Taxes, codified under the title: Income Tax Accounting Implications of the Tax Cuts and Jobs Act.” The Company determined an adjustment to deferred tax assets, along with a corresponding adjustment to valuation allowance, was needed. The adjustment resulted in no tax expense impact in connection with the re-measurement of certain deferred tax assets and liabilities from 35% to 21%. Additionally, we provisionally recorded no tax expense in connection with the transition tax on the mandatory deemed repatriation of foreign earnings, based upon an aggregate tax loss of our foreign subsidiaries for the year ended December 30, 2017. The Company finalized its accounting for the re-measurement of deferred tax balances and transition tax with no adjustment to income tax expense for the year ended December 29, 2018. In May 2017, the FASB issued Accounting Standards Update No. 2017-09, “Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting” (“ASU 2017-09”), which amends the scope of modification accounting for share-based payment arrangements, and provides guidance on the types of changes to the terms or conditions of share-based payment awards to which an entity would be required to apply modification accounting under Topic 718. The Company's adoption of ASU 2017-09 during its first quarter of 2018 had no impact on its consolidated financial statements. In November 2016, the FASB issued ASU 2016-18, which requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents and amounts generally described as restricted cash or restricted cash equivalents. As such, restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and ending-of-period total amounts shown on the statement of cash flows. The Company adopted ASU 2016-18 during the first quarter of fiscal 2018, using the retrospective transition approach. Restricted cash in the prior period has been included with cash and cash equivalents when reconciling the beginning and ending total amounts on the statement of cash flows for the year ended December 30, 2017 and December 31, 2016, to conform to the current period presentation. The adoption of ASU 2016-18 did not have a material impact on the cash flow activity presented on the Company's consolidated statements of cash flows. See the consolidated statements of cash flows for a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts on the consolidated statements of cash flows. In May 2016, the FASB issued Accounting Standards Update No. 2016-11, “Revenue Recognition (Topic 605) and Derivatives and Hedging (Topic 815): Rescission of SEC Guidance Because of Accounting Standards Updates 2014-09 and 2014-16 Pursuant to Staff Announcements at the March 3, 2016 EITF Meeting (SEC Update)” (“ASU 2016-11”), which rescinds various standards codified as part of Topic 605, Revenue Recognition in relation to the adoption of Topic 606. These rescissions include changes to topics pertaining to revenue and expense recognition for freight services in process, accounting for shipping and handling fees and costs, and accounting for consideration given by a vendor to a customer. The Company adopted ASU 2016-11 during the first quarter of 2018. See Note 3, “Revenue Recognition” to the Notes to Consolidated Financial Statements for more information. On December 31, 2017, the Company adopted Topic 606, which provides guidance for revenue recognition that superseded the revenue recognition requirements in Topic 605 and most industry specific guidance. Under Topic 606, revenue is recognized when promised goods or services are transferred to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. The Company adopted Topic 606 under the modified retrospective transition method, applying the amendments to prospective reporting periods and applied to those contracts that were not completed as of December 31, 2017. Results for reporting periods beginning after December 31, 2017 are presented under Topic 606, while prior period amounts are not adjusted and continue to be reported in accordance with the historic accounting under Topic 605. See Note 3, “Revenue Recognition” to the Notes to Consolidated Financial Statements for more information. In January 2016, the FASB issued ASU 2016-01, which requires equity investments to be measured at fair value with changes in fair value recognized in the income statement and simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment. The Company adopted ASU 2016-01 during its first quarter of 2018 and the adoption did not have a material impact on its consolidated financial statements. See Note 4, “Fair Value Measurements” to the Notes to Consolidated Financial Statements for more information. Accounting Pronouncements Not Yet Effective In August 2018, the FASB issued Accounting Standards Update No. 2018-15 (“ASU 2018-15”), “Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract.” The update provides guidance for determining if a cloud computing arrangement is within the scope of internal-use software guidance, and would require capitalization of certain implementation costs. ASU 2018-15 is effective for the Company in its first quarter of 2020, with early adoption permitted. The Company is currently evaluating the impact the adoption of ASU 2018-15 will have on its consolidated financial statements. In August 2018, the FASB issued Accounting Standards Update No. 2018-14 (“ASU 2018-14”), "Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20): Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans." The update eliminates, adds, and modifies certain disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. ASU 2018-14 is effective for the Company in its first quarter of 2021, with early adoption permitted. The Company is currently evaluating the impact the adoption of ASU 2018-14 will have on its consolidated financial statements. In August 2018, the FASB issued Accounting Standards Update No. 2018-13 (“ASU 2018-13”), “Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement.” The update eliminates, adds, and modifies certain disclosure requirements for fair value measurements. ASU 2018-13 is effective for the Company in its first quarter of 2020 and early adoption is permitted of the entire standard or only the provisions that eliminate or modify disclosure requirements. The Company is currently evaluating the impact the adoption of ASU 2018-13 will have on its consolidated financial statements. In June 2018, the FASB issued Accounting Standards Update No. 2018-07, “Improvements to Non-employee Share-Based Payment Accounting” (“ASU 2018-07”), which simplifies the accounting for share-based payments granted to non-employees for goods and services. Under ASU 2018-07, certain guidance on such payments to non-employees would be aligned with the requirements for share-based payments granted to employees. The guidance will be effective for the Company's first quarter of 2019 and early adoption is permitted. As the Company does not have material non-employee awards, it does not expect the adoption of ASU 2018-07 to have a material impact on its consolidated financial statements. In January 2017, the FASB issued Accounting Standards Update No. 2017-04, “Simplifying the Test for Goodwill Impairment” (“ASU 2017-04”). The guidance eliminates Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. The same one-step impairment test will be applied to goodwill at all reporting units, even those with zero or negative carrying amounts. Entities will be required to disclose the amount of goodwill at reporting units with zero or negative carrying amounts. ASU 2017-04 will be effective for the Company's annual or any interim goodwill impairment tests in its first quarter of fiscal 2020. The Company is currently evaluating the impact the adoption of ASU 2017-04 will have on its consolidated financial statements. In June 2016, the FASB issued Accounting Standards Update No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”), which requires measurement and recognition of expected credit losses for financial assets held. This guidance is effective for the Company in its first quarter of fiscal 2020 and early adoption is permitted. The Company is currently evaluating the impact the adoption of ASU 2016-13 will have on its consolidated financial statements. In February 2016, the FASB issued Accounting Standards Update 2016-02, “Leases (Topic 842)” (“ASU 2016-02”), which amends the existing accounting standards for leases. The new standard requires lessees to record a right-of-use asset and a corresponding lease liability on the balance sheet (with the exception of short-term leases). For lessees, leases will continue to be classified as either operating or financing in the income statement. This guidance is effective for the Company in its first quarter of fiscal 2019. ASU 2016-02 is required to be applied with a modified retrospective approach and requires application of the new standard at the beginning of the earliest comparative period presented. In July 2018, the FASB issued Accounting Standards Update 2018-11 “Leases (Topic 842): Targeted Improvements,” (“ASU 2018-11”), which provides lessees an additional (and optional) transition method to apply the new leasing standard to all open leases at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. In December 2018, the FASB issued Accounting Standards Update 2018-20, “Narrow-Scope Improvements for Lessors,” which contains certain narrow scope improvements to the guidance issued in ASU 2016-02. The Company is currently evaluating the other possible impacts the adoption of ASU 2016-02, ASU 2018-11 and ASU 2018-20 will have on its consolidated financial statements. |
