Overview, Basis of Presentation and Significant Accounting Policies | (1) Overview, Basis of Presentation and Significant Accounting Policies (a) Overview On August 26, 2011, SMART Global Holdings, Inc., formerly known as Saleen Holdings, Inc., a Cayman Islands exempted company (SMART Global Holdings, and together with its subsidiaries, the Company), consummated a transaction with SMART Worldwide Holdings, Inc., formerly known as SMART Modular Technologies (WWH), Inc. (SMART Worldwide), pursuant to an Agreement and Plan of Merger whereby, through a series of transactions, SMART Global Holdings acquired substantially all of the equity interests of SMART Worldwide with SMART Worldwide surviving as an indirect wholly-owned subsidiary of SMART Global Holdings (the Acquisition). SMART Global Holdings is an entity that was formed by investment funds affiliated with Silver Lake Partners and Silver Lake Sumeru (collectively Silver Lake). As a result of the Acquisition, since there was a change of control resulting in Silver Lake as the controlling shareholder group, the Company applied the acquisition method of accounting and established a new basis of accounting. The Company, through its subsidiaries, is a leading designer and manufacturer of electronic products focused on memory and computing technology areas. The Company specializes in application specific product development and support for customers in enterprise, government and original equipment manufacturer, or OEM markets. Customers rely on SMART as a strategic supplier with top tier customer service, product quality, and technical support with engineering, sales, manufacturing, supply chain and logistics capabilities worldwide. The Company targets customers in markets such as communications, storage, networking, mobile, industrial automation, industrial internet of things, government, military, edge computing and high performance computing. The Company operates in three segments: Specialty Memory Products, Brazil Products and Specialty Compute and Storage Solutions, or SCSS. SMART Global Holding is domiciled in the Cayman Islands and has U.S. headquarters in Newark, California. The Company has operations in the United States, Brazil, Malaysia, Taiwan, Hong Kong, Scotland, Singapore, India, Netherlands and South Korea. (b) Basis of Presentation The accompanying consolidated financial statements comprise SMART Global Holdings and its wholly owned subsidiaries. Intercompany transactions have been eliminated in the consolidated financial statements. The Company uses a 52- to 53-week fiscal year ending on the last Friday in August. Fiscal 2020, 2019 and 2018 ended on August 28, 2020, August 30, 2019 and August 31, 2018, respectively, and included 52, 52 and 53 weeks, respectively. All financial information for two of the Company’s subsidiaries, SMART Modular Technologies Indústria de Componentes Eletrônicos Ltda. (SMART Brazil) and SMART Modular Technologies do Brasil Indústria e Comércio de Componentes Ltda. (SMART do Brazil), is included in the Company’s consolidated financial statements on a one-month lag because their fiscal years begin August 1 and end July 31. (c) Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP 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 financial statements and the reported amounts of revenues and expenses during the reporting periods presented. Actual results could differ from the estimates made by management. Significant items subject to such estimates and assumptions include the evaluation of the fair value of the Company's reporting units (as part of the Company’s goodwill impairment), accounting for the allocation of convertible debt between equity and debt, the useful lives of long-lived assets, the valuation of deferred tax assets, inventory and contingent consideration in business acquisitions, share-based compensation, the estimated net realizable value of Brazilian tax credits, income tax uncertainties and other contingencies. (d) Revenue The Company’s revenues include products and services. The Company’s product revenues are predominantly derived from the sale of memory modules, flash memory cards, compute products and storage products, which the Company designs and manufactures. The Company’s service revenues are derived from procurement, logistics, inventory management, temporary warehousing, kitting and packaging services. Also, a small portion of the Company’s product sales include extended warranty and on-site services, subscriptions to the Company’s high performance computing environment, professional services, software and related support. The Company determines revenue recognition through the following steps: (1) identification of the contract with a customer; (2) identification of the performance obligations in the contract; (3) determination of the transaction price; (4) allocation of the transaction price to the performance obligations in the contract; and (5) recognition of revenue when, or as, a performance obligation is satisfied. The Company’s contracts are executed through a combination of written agreements along with purchase orders with all customers including certain general terms and conditions. Generally, purchase orders entail products, quantities and prices, which define the performance obligations of each party and are approved and accepted by the Company. The Company’s contracts with customers do not include extended payment terms. Payment terms vary by contract type and type of customer and generally range from 30 to 45 days from invoice. Additionally, taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, that are collected by the Company from a customer and deposited with the relevant government authority, are excluded from revenue. The transaction price is determined based on the consideration to which the Company will be entitled in exchange for transferring goods or services to the customer adjusted for estimated variable consideration. Variable consideration may include discounts, rights of return, refunds, and other similar obligations. The Company allocates the transaction price to each distinct product and service based on its relative standalone selling price. The standalone selling price for products primarily involves the cost to produce the deliverable plus the anticipated margin and for services is estimated based on the Company’s approved list price. In the normal course of business, the Company does not accept product returns unless the items are defective as manufactured. The Company establishes provisions for estimated returns and warranties. In addition, the Company does not typically provide customers with the right to a refund and does not transact for noncash consideration. Standard Products The Company’s main performance obligations are to deliver the requested goods to customers according to the agreed-upon shipping terms. The Company recognizes revenue when control transfers to the customer (i.e., when the Company’s performance obligation is satisfied). The Company invoices the customer and recognizes revenues for such delivery when control transfers based on shipping terms. Customized Products For customized product sales with terms that require the customer to purchase 100% of all parts built to fulfill the customers forecast, the Company recognizes revenue when control of the underlying assets passes to the customer, as the customer is able to both direct the use of, and obtain substantially all of the remaining benefit from the assets; the customer has the significant risks and rewards associated with ownership of the assets; and the Company has a present right to payment. For these sales, control passes when the Company has made these products available to the customer and under the terms of the agreement cannot repurpose them without the customer’s express consent. Accordingly, the Company will recognize revenue at the point in time when products made to the customer’s order or forecast are completed and made available to the customer. Non-cancellable nonrefundable, or NCNR, customized product sales are recognized over time on a cost incurred basis. The customer obtains control and benefits from the services as they are performed over the period based on the cost input measure in the production process for the NCNR customized product. The terms within the NCNR sales orders provide the Company with a legally enforceable right to receive payment including a reasonable profit margin upon customer cancellation for performance completed to date. Accordingly, the Company recognizes revenue over time as customized products listed within the NCNR orders are completed. Computing Products and Services A small portion of the Company’s product sales includes extended warranty and on-site services, subscriptions to the Company’s high performance computing environment, professional consulting services including installation and other services, and hardware and software related support. Each contract may contain multiple performance obligations, which requires the transaction price to be allocated to each performance obligation. The Company allocates the consideration to each performance obligation based on the relative selling price. The Company uses best-estimated selling price, determined as the best estimate of the price at which the Company would transact if it sold the deliverable regularly on a stand-alone basis. For services provided to the customers over a period of time, such revenues are recognized over time in line with when the customer receives and consumes the benefit of the services. Extended warranty and on-site services, hardware support, software support, and subscription revenue for access to the Company’s high performance computing environment is deferred and recognized ratably over the contractual period as the Company transfers control as it satisfies its performance obligations over time as the services are rendered. These services contracts are typically one to three years in length. Subscription revenue for certain customers is recognized based on the contractual fee to use the high-performance-computing environment. Professional consulting services revenue is recognized as the service is performed and the customer obtains control and benefits from the services as they are performed over the period. The methods of recognizing revenue for each of these products and services were selected because they reflect a faithful depiction of the transfer of control. Agency Services The Company has service performance obligations for agency related services such as procurement, logistics, inventory management, temporary warehousing, kitting and packaging services for certain agency basis customers. The agency services are also known as supply chain services and the performance obligations for these services consist of customized, integrated supply chain services management to assist customers in the planning, execution and overall management of the procurement processes. For these customers that are accounted for on an agency basis, the Company recognizes as revenue the amount billed less the material procurement costs of products serviced as an agent with the cost of providing these services embedded with the cost of sales. The Company has separate agent performance obligations as follows: (a) procurement, logistics, and inventory management, (b) temporary warehousing, and (c) kitting and packaging services for these customers. Revenue from these arrangements is recognized as service revenue and is determined by a fee for services based on material procurement costs (i.e. fee as a percentage of the associated material being procured, warehoused, kitted or packaged). The Company recognizes revenue for procurement, logistics and inventory management upon the completion of the services or performance obligation, typically upon shipment of the product, as the criteria for over time recognition is not met. For temporary warehousing, kitting and packaging services, revenue is recognized over time, but the period of performance is typically very short in duration. There are no obligations subsequent to shipment of the product under the agency arrangements. Contract Costs As a practical expedient, the Company recognizes the incremental costs of obtaining a contract, specifically commission expenses that have an amortization period of less than twelve months, as an expense when incurred. Additionally, the Company has adopted an accounting policy to recognize shipping and handling costs that occur after control transfers, if any, to the customer as a fulfillment activity. The Company records shipping and handling costs related to revenue transactions within cost of sales as a period cost. Gross Billings and Net Sales The following is a summary of the Company’s gross billings to customers and net sales for services and products (in thousands): Fiscal Year Ended August 28, August 30, August 31, 2020 2019 2018 (2) Service revenue, net $ 32,204 $ 42,527 $ 42,978 Cost of purchased materials - service (1) 604,698 946,303 1,013,393 Gross billings for services 636,902 988,830 1,056,371 Product net sales 1,090,173 1,169,472 1,245,843 Gross billings to customers $ 1,727,075 $ 2,158,302 $ 2,302,214 Product net sales $ 1,090,173 $ 1,169,472 $ 1,245,843 Service revenue, net 32,204 42,527 42,978 Net sales $ 1,122,377 $ 1,211,999 $ 1,288,821 (1) Represents material procurement costs of products provided as an agent reported on a net basis. (2) Amounts for fiscal 2018 are accounted for under ASC 605 (refer to Note 1(u)). Gross billings to customers in the table above represents total amounts invoiced to customers during the period and is the sum of net sales plus material procurement costs of products the Company provides as an agent. The amount invoiced to customers for agency related services is the total of the related material procurement costs and fees for providing its services. Gross billings to customers are reflected in accounts receivable for unpaid invoices as of the end of the period. Additionally, material procurement costs of products the Company manages as an agent on behalf of its customers on hand as of the end of the period are reflected in inventory. Both the amounts in accounts receivable and inventory impact the determination of net cash provided by (or used in) operations. Contract Balances The Company records accounts receivable when it has an unconditional right to consideration. Contract assets represent amounts recognized as revenue for which the Company does not have the unconditional right to consideration. All contract assets represent amounts related to invoices expected to be issued during the next 12-month period and are recorded as prepaid expenses and other current assets. Contract liabilities are recorded when cash payments are received or due in advance of performance. Contract liabilities consist of advance payments and deferred revenue, where the Company has unsatisfied performance obligations. Contract liabilities are classified as deferred revenue and are allocated between accrued liabilities and other long-term liabilities on our consolidated balance sheet based on the timing of when the customer takes control of the asset or receives the benefit of the service. Payment terms vary by customer. The time between invoicing and when payment is due is not significant. Changes in the accounts receivable, contract assets and the deferred revenues balances during the years ended August 28, 2020 and August 30, 2019 are as follows (in thousands): August 28, August 30, 2020 2019 $ Change Accounts receivable $ 215,918 $ 217,433 $ (1,515 ) Contract assets $ 5,068 $ 4,606 $ 462 Deferred revenue $ 20,124 $ 24,219 $ (4,095 ) The increase in contract assets from $4.6 million at August 30, 2019 to $5.1 million as of August 28, 2020 was primarily driven by the recognition of revenue that had not yet been billed. The decrease in deferred revenue from $24.2 million to $20.1 million was due to fewer deferred services billed during the period. During fiscal 2020 and fiscal 2019, $17.3 million and $6.8 million, respectively, of revenue recognized was included in the deferred revenue balance at the beginning of the period, which was offset by additional deferrals during the period. Disaggregation of Revenue The Company disaggregates revenue by segment and geography; no other level of disaggregation is required considering the type of products, customer, markets, contracts, duration of contracts, timing of transfer of control and sales channels. The revenue by segment and geography is disclosed in Note 11. Revenue Allocated to Remaining Performance Obligations The Company’s performance obligations related to product sales have a contractual duration of less than one year. The Company elected to apply the optional exemption practical expedient provided in ASC 606 and, therefore, is not required to disclose the aggregate amount of the transaction price allocated to those performance obligations that are unsatisfied or partially unsatisfied at the end of the reporting period. Remaining performance obligations represent contracted revenue related to support services that have not yet been recognized. The Company expects to recognize revenue on the remaining performance obligations as follows (in thousands): August 28, 2020 Within 1 year $ 17,264 2-3 years 1,386 Thereafter 1,474 $ 20,124 (e) Cash and Cash Equivalents All highly liquid investments with maturities of 90 days or less from original dates of purchase are carried at cost, which approximates fair value, and are considered to be cash equivalents. Cash and cash equivalents include cash on hand, cash deposited in checking and saving accounts, money market accounts and securities with maturities of less than 90 days at the time of purchase. (f) Allowance for Doubtful Accounts The Company evaluates the collectability of accounts receivable based on a combination of factors. In cases where the Company is aware of circumstances that may impair a specific customer’s ability to meet its financial obligations, the Company records a specific allowance against amounts due and, thereby, reduces the net recognized receivable to the amount management reasonably believes will be collected. For all other customers, the Company recognizes allowances for doubtful accounts based on a combination of factors including the length of time the receivables are outstanding, industry and geographic concentrations, the current business environment and historical experience. The changes in the accounts receivable allowances and sales returns during fiscal 2020, 2019 and 2018 are as follows (in thousands): Total Balance as of August 25, 2017 $ 314 Charges to costs and other 220 Additions from business acquisition (see Note 2) 82 Deductions (391 ) Balance as of August 31, 2018 225 Charges to costs and other 1,091 Additions from business acquisitions (see Note 2) 50 Deductions (1,182 ) Balance as of August 30, 2019 184 Charges to costs and other 911 Deductions (994 ) Balance as of August 28, 2020 $ 101 (g) Derivative Financial Instrument The Company records the assets or liabilities associated with derivative instruments at fair value based on Level 2 inputs in prepaid expenses and other current assets and accrued liabilities, respectively, in the consolidated balance sheets. The accounting for gains and losses resulting from changes in fair value depends on the use of the derivative and whether it is designated and qualifies for hedge accounting. See Note 4 for further details. (h) Inventories Inventories are valued at the lower of actual cost or net realizable value. Inventory value is determined on a specific identification basis for material and an allocation of labor and manufacturing overhead. At each balance sheet date, the Company evaluates the ending inventories for excess quantities and obsolescence. This evaluation includes an analysis of sales levels by product family and considers historical demand and forecasted demand in relation to the inventory on hand, competitiveness of product offerings, market conditions and product life cycles. The Company adjusts carrying value to the lower of its cost or net realizable value. Inventory write-downs are not reversed and create a new cost basis. (i) Brazil Taxes Financial Credits In 1991, Brazil created the PPB/IT Program to incentivize local manufacturing by allowing qualified companies to receive incentives when they sell specified IT products, including desktops, notebooks, servers, SmartTVs and mobile products manufactured in Brazil. In 2007, the Brazilian legislature created a program known as PADIS to promote the semiconductor industry. The Company has been a participant in the PPB/IT Program and PADIS since 2011. Among other incentives, the PPB/IT Program provided for certain reductions in the rate of IPI, a federal tax applied to industrial goods, as well as for PADIS companies, reducing to zero, IPI, import taxes and taxes known as PIS and COFINS levied over sales. As part of making the PPB/IT and P ADIS As a result, the PPB/IT Program and PADIS participants are entitled to a subsidy for operational costs, granted as financial credits, which may be used by participants either as a credit against certain federal taxes, or to request a refund in cash. PADIS beneficiaries are entitled to a subsidy for operational costs granted as financial credits to be used against certain federal taxes, equivalent to 2.62 times the effective disbursements in research and development initiatives under PADIS, limited to a cap of 13.1% of the total incentivized revenues within the country. The financial credits under the PPB/IT Program range from 2.73 to 3.41 times the research and development invested, limited to 10.92% to 13.65% of domestic gross sales revenues, depending on the location of the participant and on what products it manufactures and sells. These multipliers and caps decline over time. Under the current law, the financial credits are available for PADIS companies through January 2022 and for other PPB/IT Program participants through December 2029. For year ended August 28, 2020, the Company recognized financial credits under PADIS totaling $6.4 million which are reported under research and development as a reduction of expense on the consolidated statements of operations. As of August 28, 2020, unused financial credits totaling $6.4 million are reported under prepaid expenses and other current assets, and are expected to be applied against future taxes. Prepaid State Value-Added Taxes (ICMS) Since 2004, the Sao Paulo State tax authorities have granted SMART Brazil a tax benefit to defer and eventually eliminate the payment of ICMS levied on certain imports from independent suppliers. This benefit, known as an ICMS Special Regime, is subject to renewal every two years. When the then current ICMS Special Regime expired on March 31, 2010, SMART Brazil timely applied for a renewal of the benefit, however, the renewal was not granted until August 4, 2010. On June 22, 2010, the Sao Paulo authorities published a regulation allowing companies that applied for a timely renewal of an ICMS Special Regime to continue utilizing the benefit until a final conclusion on the renewal request was rendered. As a result of this publication, SMART Brazil was temporarily allowed to utilize the benefit while it waited for its renewal. From April 1, 2010, when the ICMS benefit lapsed, through June 22, 2010 when the regulation referred to above was published, SMART Brazil was required to pay the ICMS taxes on imports, which payments result in ICMS credits that may be used to offset ICMS obligations generated from sales by SMART Brazil of its products; however, the vast majority of SMART Brazil’s sales in Sao Paulo were either subject to a lower ICMS rate or were made to customers that were entitled to other ICMS benefits that enabled them to eliminate the ICMS levied on their purchases of products from SMART Brazil. As a result, from April 1, 2010 through June 22, 2010, SMART Brazil did not have sufficient ICMS collections against which to apply the credits and the credit balance increased significantly. Effective February 1, 2011, in connection with its participation in a Brazilian government incentive program known as Support Program for the Technological Development of the Semiconductor and Display Industries Laws, or PADIS, SMART Brazil spun off the module manufacturing operations into SMART do Brazil, a separate subsidiary of the Company. In connection with this spin off, SMART do Brazil applied for a tax benefit from the State of Sao Paulo in order to obtain a deferral of state ICMS. This tax benefit is referred to as State PPB, or CAT 14. The CAT 14 approval was not obtained until July 21, 2011, and from February 1, 2011 until the CAT 14 approval was granted, SMART do Brazil did not have sufficient ICMS collections against which to apply the credits accrued upon payment of the ICMS on SMART do Brazil’s imports and inputs locally acquired, and therefore, it generated additional excess ICMS credits. As of August 28, 2020, the total ICMS tax credits reported on the Company’s accompanying consolidated balance sheet are R$21.2 million (or $4.1 million), of which (i) R$19.6 million (or $3.8 million) are fully vested ICMS credits, classified as other noncurrent assets, and (ii) R$1.6 million (or $0.3 million) are ICMS credits subject to vesting in 48 equal monthly amounts, classified as prepaid expenses and other current assets (R$0.7 million or $0.1 million), and other noncurrent assets (R$0.9 million or $0.2 million). As of August 30, 2019, the total ICMS tax credits reported on the Company’s accompanying consolidated balance sheet are R$32.3 million (or $8.6 million), of which (i) R$7.2 million (or $1.9 million) are fully vested ICMS credits, classified as prepaid and other current assets, and R$23.2 million (or $6.2 million) are fully vested ICMS credits, classified as other noncurrent assets, and (ii) R$ 1.9 million (or $0.5 million) are ICMS credits subject to vesting in 48 equal monthly amounts, classified as prepaid expenses and other current assets (R$0.6 million or $0.2 million), and other noncurrent assets (R$1.3 million or $0.3 million). It is expected that the excess ICMS credits will continue to be recovered in fiscal 2021 through fiscal 2023. The Company updates its forecast of the recoverability of the ICMS credits quarterly, considering the following key variables in Brazil: timing of government approvals of automated credit utilization, the total amount of sales, the product mix and the inter and intra state mix of sales. If these estimates or the mix of products or regions vary, it could take longer or shorter than expected to recover the accumulated ICMS credits, resulting in a reclassification of ICMS credits from current to noncurrent, or vice versa. In April and June 2016, the Company filed cases with the State of Sao Paulo tax authorities to seek approval to sell these excess ICMS credits. In December 2017, the Company obtained approval to sell R$31.6 million (or $6.1 million) of its ICMS credits. Once approved, sale of ICMS credits usually take several months to complete and typically incur a discount to the face amount of the credits sold, as well as fees for the arrangers of these sales which together aggregate 10% to 15% of the face amount of the credits being sold. Once the sale is complete, the tax authorities usually approve the transfer of credits in monthly installments and the proceeds resulting from the sale of the aforementioned credits shall be received by the Company accordingly. The Company has recorded valuation adjustments for the estimated discount and fees that the Company will need to offer in order to sell ICMS credits to other companies. To adapt to the market, in the fourth quarter of fiscal 2020, the Company reassessed the discount rate for the sale of the ICMS credits to other companies, adjusting it to 22%, resulting in a charge of R$5.9 million (or $1.1 million) on the consolidated statements of operations. In the first quarter of fiscal 2019, the Company sold R$17.7 million (or $3.4 million) of its ICMS credits that had been approved to be sold in December 2017. The payments were received in 22 installments starting in the second quarter of fiscal 2019 through fiscal 2020, or R$10.0 million (or $1.9 million) and R$7.7 million (or $1.5 million) in fiscal 2019 and 2020, respectively, thus finalizing the receipt of all installments of the contract. (j) Property and Equipment Property and equipment are recorded at cost. Depreciation and amortization are computed based on the shorter of the estimated useful lives or the related lease terms, using the straight-line method. Estimated useful lives are presented below: Period Asset: Manufacturing equipment 2 to 5 years Office furniture, software, computers and equipment 2 to 5 years Leasehold improvements* 2 * Includes the land lease for the Penang facility with a term expiring in 2070. (k) Goodwill The Company performs a goodwill impairment test annually during the fourth quarter of its fiscal year and more frequently if events or circumstances indicate that impairment may have occurred. Such events or circumstances may, among others, include significant adverse changes in the general business climate. As of August 28, 2020 and August 30, 2019, the carrying value of goodwill on the Company’s consolidated balance sheet was $74.0 million and $81.4 million, respectively. When conducting the annual impairment test for goodwill, the Company compares the estimated fair value of a reporting unit containing goodwill to its carrying value. If the fair value of the reporting unit is determined to be more than its carrying value, no goodwill impairment is recognized. The Company determines the fair value of the Company's reporting units using the income approach methodology of valuation that includes the discounted cash flow method as well as the market approach which includes the guideline company method. No impairment of goodwill was recognized through August 28, 2020. The changes in the carrying amount of goodwill during fiscal 2020 and 2019 are as follows (in thousands): Specialty Memory Products Brazil Products SCSS Total Balance as of August 31, 2018 $ 14,720 $ 26,099 $ 4,575 $ 45,394 Provisional adjustment from business acquisition (see Note 2) — — 671 671 Addition from business acquisition (see Note 2) — — 35,428 35,428 Translation adjustments — (70 ) — (70 ) Balance as of August 30, 2019 14,720 26,029 40,674 81,423 Provisional adjustments from business acquisition (see Note 2) — — (273 ) (273 ) Translation adjustments — (7,195 ) — (7,195 ) Balance as of August 28, 2020 $ 14,720 $ 18,834 $ 40,401 $ 73,955 (l) Intangible Assets, Net The following table summarizes the gross amounts and accumulated amortization of intangible assets by type as of August 28, 2020 and August 30, 2019 (dollars in thousands): August 28, 2020 August 30, 2019 Weighted Gross Gross avg. Carrying Accumulated Carrying Accumulated life (yrs) amount amortization Net amount amortization Net Customer relationships 4-7 $ 52,300 $ (12,899 ) $ 39,401 $ 52,300 $ (3,755 ) $ 48,545 Trademarks/tradename 5-7 13,100 (4,095 ) 9,005 13,100 (2,172 ) 10,928 Technology 4 10,350 (3,085 ) 7,265 10,350 (498 ) 9,852 Backlog < 1 400 (400 ) — 400 (400 ) — Total $ 76,150 $ (20,479 ) $ 55,671 $ 76,150 $ (6,825 ) $ 69,325 Amortization expense related to intangible assets totaled approximately $13.7 million, $5.6 million and $6.1 million in fiscal 2020, 2019 and 2018, respectively. Acquired intangibles are amortized on a straight-line basis over the remaining estimated economic life of the underlying intangible assets. Fiscal Year Ended August 28, August 30, August 31, 2020 2019 2018 Amortization of intangible assets classification (in thousands): Cost of sales $ 2,587 $ 566 $ 7 Research and development — — 987 Selling, general and administrative 11,067 5,048 5,136 Total $ 13,654 $ 5,614 $ 6,130 Estimated amortization expense of these intangible assets for the next five fiscal years and all years thereafter are as follows (in thousands): Amount Fiscal year ending August: 2021 $ 13,654 2022 13,639 2023 12,879 2024 9,092 2025 6,407 Total $ 55,671 (m) Long-Lived Assets Long-lived assets, excluding goodwill, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset gro |