Accounting Policies, by Policy (Policies)

12 Months Ended

Mar. 31, 2013

Basis of Accounting, Policy [Policy Text Block]

Basis of Presentation— Our fiscal years consist of 52 or 53 weeks. In a 52-week year, each fiscal quarter consists of 13 weeks. Fiscal years 2013, 2012 and 2011 consisted of 52, 53 and 52 weeks, respectively. Fiscal year 2014 will consist of 52 weeks. Fiscal years ended March 31, 2013, April 1, 2012 and March 27, 2011 are also referred to as “2013,” “2012,” and “2011” unless otherwise indicated.

Certain reclassifications have been made to the prior year consolidated financial statements to conform to the current year’s presentation. Such reclassification had no effect on previously reported results of operations or stockholders’ equity.

Consolidation, Policy [Policy Text Block]

Principles of Consolidation—The consolidated financial statements include the accounts of Exar and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated.

Use of Estimates, Policy [Policy Text Block]

Use of Management Estimates—The preparation of consolidated financial statements in conformity with generally accepted accounting principles in the United States requires management to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and related disclosure of contingent assets and liabilities. On an on-going basis, we evaluate our estimates, including (1) revenue recognition; (2) allowance for doubtful account (3); valuation of inventories; (4) income taxes; (5) stock-based compensation; (6) goodwill; (7) long-lived assets; and (8) contingent consideration. Actual results could differ from these estimates and material effects on operating results and financial position may result.

Business Combinations Policy [Policy Text Block]

Business Combinations—The estimated fair value of acquired assets and assumed liabilities and the results of operations of acquired businesses are included in our consolidated financial statements from the effective date of the purchase. The total purchase price is allocated to the estimated fair value of assets acquired and liabilities assumed. (See Note 4—“Business Combinations.”)

Cash and Cash Equivalents, Policy [Policy Text Block]

Cash and Cash Equivalents—We consider all highly liquid debt securities and investments with maturities of 90 days or less from the date of purchase to be cash and cash equivalents. Cash and cash equivalents also consist of cash on deposit with banks and money market funds.

Inventory, Policy [Policy Text Block]

Inventories—Inventories are recorded at the lower of cost or market, determined on a first-in, first-out basis. Cost is computed using the standard cost, which approximates average actual cost. Inventory is written down when conditions indicate that the selling price could be less than cost due to physical deterioration, obsolescence, changes in price levels, or other causes. The write-down of excess inventories is generally based on inventory levels in excess of 12 months of demand, as judged by management, for each specific product.

Property, Plant and Equipment, Policy [Policy Text Block]

Property, Plant and Equipment—Property, plant and equipment, including assets held under capital leases and leasehold improvements, are stated at cost less accumulated depreciation and amortization. Depreciation for machinery and equipment is computed using the straight-line method over the estimated useful lives of the assets, which ranges from three to 10 years. Buildings are depreciated using the straight-line method over an estimated useful life of 30 years. Assets held under capital leases and leasehold improvements are amortized over the shorter of the terms of the leases or their estimated useful lives. Land is not depreciated.

Investment, Policy [Policy Text Block]

Non-Marketable Equity Securities—Non-marketable equity investments are accounted for at historical cost and are presented on our consolidated balance sheets within other non-current assets.

Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]

Other-Than-Temporary Impairment—All of our marketable and non-marketable investments are subject to periodic impairment reviews. Investments are considered to be impaired when a decline in fair value is judged to be other-than-temporary, as follows:

Marketable investments—When the resulting fair value is significantly below cost basis and/or the significant decline has lasted for an extended period of time, we perform an evaluation to determine whether the marketable equity security is other than temporarily impaired. The evaluation that we use to determine whether a marketable equity security is other than temporarily impaired is based on the specific facts and circumstances present at the time of assessment, which include significant quantitative and qualitative assessments and estimates regarding credit ratings, collateralized support, the length of time and significance of a security’s loss position and intent and ability to hold a security to maturity or forecasted recovery. Other-than-temporary declines in value of our investments are reported in the impairment charges on investments line in the consolidated statements of operations.

Non-marketable equity investments—When events or circumstances are identified that would likely have a significant adverse effect on the fair value of the investment and the fair value is significantly below cost basis and/or the significant decline has lasted for an extended period of time, we perform an impairment analysis. The indicators that we use to identify those events and circumstances include:

• the investment manager’s evaluation;

• the investee’s revenue and earnings trends relative to predefined milestones and overall business prospects;

• the technological feasibility of the investee’s products and technologies;

• the general market conditions in the investee’s industry; and

• the investee’s liquidity, debt ratios and the rate at which the investee is using cash.

Investments identified as having an indicator of impairment are subject to further analysis to determine if the investment is other than temporarily impaired, and if so, the investment is written-down to its impaired value. When an investee is not considered viable from a financial or technological point of view, the entire investment is written down. Impairment of non-marketable equity investments is recorded in the impairment charges on investments line in the consolidated statements of operations.

Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]

Goodwill— Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in a business combination. We evaluate goodwill for impairment on an annual basis or whenever events and changes in circumstances suggest that the carrying amount may not be recoverable. We conduct our annual impairment analysis in the fourth quarter of each fiscal year. Impairment of goodwill is tested at the reporting unit level by comparing the reporting unit’s carrying amount, including goodwill, to the fair value of the reporting unit. Estimations and assumptions regarding the number of reporting units, future performances, results of our operations and comparability of our market capitalization and net book value will be used. If the carrying amount of the reporting unit exceeds its fair value, goodwill is considered impaired and a second step is performed to measure the amount of impairment loss. Because we have one reporting unit, we utilize an entity-wide approach to assess goodwill for impairment.

Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block]

Long-Lived Assets—We assess the impairment of long-lived assets when events or changes in circumstances indicate that the carrying value of the assets or the asset group may not be recoverable. Factors that we consider in deciding when to perform an impairment review include significant negative industry or economic trends, and significant changes or planned changes in our use of the assets. These factors can also be referred to as triggering events. We measure the recoverability of assets that will continue to be used in our operations by comparing the carrying value of the asset group our estimate of the related total future undiscounted net cash flows. If an asset group’s carrying value is not recoverable through the related undiscounted cash flows, the asset group is considered to be impaired. The impairment is measured by comparing the difference between the asset group’s carrying value and its fair value. Long-lived assets such as goodwill; intangible assets; and property, plant and equipment are considered non-financial assets, and are recorded at fair value only if an impairment charge is recognized.

Impairments of long-lived assets are determined for groups of assets related to the lowest level of identifiable independent cash flows. We operate with one asset group on an enterprise basis. As a result, we believe the lowest identifiable cash flows reside at the enterprise level.

When we determine that the useful lives of assets are shorter than we had originally estimated, we accelerate the rate of depreciation and/or amortization over the assets’ new, shorter useful lives.

Substantially all of our property, plant and equipment and other long-lived assets are located in the United States.

In Process Research and Development, Policy [Policy Text Block]

In-process research and development—In-process research and development (“IPR&D”) assets are considered indefinite-lived intangible assets and are not subject to amortization until their useful life is determined. IPR&D assets must be tested for impairment annually or more frequently if events or changes in circumstances indicate that the asset might be impaired. The impairment test consists of a comparison of the fair value of the IPR&D assets with their carrying values. If the carrying amount of the IPR&D asset exceeds its fair value, an impairment loss must be recognized in an amount equal to that excess. After an impairment loss is recognized, the adjusted carrying amount of the IPR&D assets will be their new accounting basis. Subsequent reversal of a previously recognized impairment loss is prohibited. The initial determination and subsequent evaluation for impairment of the IPR&D asset requires management to make significant judgments and estimates. Once an IPR&D project has been completed, the useful life of the IPR&D asset is determined and amortized accordingly. If the IPR&D asset is abandoned, the remaining carrying value is written off.

Income Tax, Policy [Policy Text Block]

Income Taxes—Deferred taxes are recognized using the asset and liability method, whereby deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases, operating losses and tax credit carryforwards. Valuation allowances are provided if it is more likely than not that some or all of the deferred tax assets will not be realized.

Revenue Recognition, Policy [Policy Text Block]

Revenue Recognition—We recognize revenue in accordance with Financial Accounting Standards Board (“FASB”) authoritative guidance for Revenue Recognition. Four basic criteria must be met before revenue can be recognized: (1) persuasive evidence of an arrangement exists; (2) delivery has occurred or services have been rendered; (3) the price is fixed or determinable; and (4) collectability is reasonably assured.

We derive revenue principally from the sale of our products to distributors and to OEMs or their contract manufacturers. Our delivery terms are primarily free on board (“FOB”) shipping point, at which time title and all risks of ownership are transferred to the customer.

To date, software revenue has been an immaterial portion of our net sales.

Non-distributors—For non-distributors, revenue is recognized when title to the product is transferred to the customer, which occurs upon shipment or delivery, depending upon the terms of the customer order, provided that persuasive evidence of a sales arrangement exists, the price is fixed or determinable, collection of the resulting receivables is reasonably assured, there are no customer acceptance requirements and there are no remaining significant obligations. Provisions for returns and allowances for non-distributor customers are provided at the time product sales are recognized. Allowances for sales returns and other reserves are recorded based on historical experience or specific identification of an event necessitating an allowance.

Distributors—Agreements with our two primary distributors permit the return of 3% to 6% of their purchases during the preceding quarter for purposes of stock rotation. For one of these distributors, a scrap allowance of 1% of the preceding quarter’s purchases is permitted. We also provide discounts to certain distributors based on volume of product they sell for a specific product with a specific volume range for a given customer over a period not to exceed one year.

We recognize revenue from each of our distributors using the sell-in basis or sell-through basis, each as described below. Once adopted, the basis for revenue recognition for a distributor is maintained unless there is a change in circumstances indicating the basis for revenue recognition for that distributor is no longer appropriate.

• Sell-in Basis—Revenue is recognized upon shipment if we conclude we meet the same criteria as for non-distributors discussed above and we can reasonably estimate the credits for returns, pricing allowances and/or other concessions. We record an estimated allowance, at the time of shipment, based upon historical patterns of returns, pricing allowances and other concessions (i.e., “sell-in” basis).

• Sell-through Basis—Revenue and the related costs of sales are deferred until the resale to the end customer if we grant more than limited rights of return, pricing allowances and/or other concessions or if we cannot reasonably estimate the level of returns and credits issuable (i.e., “sell-through” basis). Under the sell-through basis, accounts receivable are recognized and inventory is relieved upon shipment to the distributor as title to the inventory is transferred upon shipment, at which point we have a legally enforceable right to collection under normal terms. The associated sales and cost of sales are deferred and are included in deferred income and allowances on sales to distributors in the consolidated balance sheet. When the related product is sold by our distributors to their end customers, at which time the ultimate price we receive is known, we recognize previously deferred income as sales and cost of sales.

	As of March 31, 2013			As of April 1, 2012
Deferred revenue at published list price	$	18,652		$	20,787
Deferred cost of revenue		(6,778	)		(7,769	)
Deferred income	$	11,874		$	13,018

Sell-through revenue recognition is highly dependent on receiving pertinent and accurate data from our distributors in a timely fashion. Distributors provide us periodic data regarding the product, price, quantity, and end customer when products are resold as well as the quantities of our products they still have in stock. We must use estimates and apply judgments to reconcile distributors’ reported inventories to their activities. Any error in our judgment could lead to inaccurate reporting of our net sales, gross profit, deferred income and allowances on sales to distributors and net income.

Mask Costs Policy [Text Block]

Mask Costs— We incur costs for the fabrication of masks to manufacture our products. If we determine the product technological feasibility has been achieved when costs are incurred, the costs will be treated as pre-production costs and capitalized as machinery and equipment under property, plant and equipment. The amount will be amortized to cost of sales over the estimated production period of the product. If product technological feasibility has not been achieved or the mask is not expected to be utilized in production manufacturing, the related mask costs are expensed to R&D when incurred. We will periodically assess capitalized mask costs for impairment. During the fiscal years ended March 31, 2013 and April 1, 2012, total mask costs capitalized was $1.7 million and $0, respectively. The costs capitalized during March 31, 2013 will be amortized over five years.

Research and Development Expense, Policy [Policy Text Block]

Research and Development Expenses—Research and development costs consist primarily of salaries, employee benefits, certain types of mask tooling costs, depreciation, amortization, overhead, outside contractors, facility expenses, and non-recurring engineering fees. Expenditures for research and development are charged to expense as incurred. In accordance with FASB authoritative guidance for the costs of computer software to be sold, leased or otherwise marketed, certain software development costs are capitalized after technological feasibility has been established. The period from achievement of technological feasibility, which we define as the establishment of a working model, until the general availability of such software to customers, has been short, and therefore software development costs qualifying for capitalization have been insignificant. Accordingly, we have not capitalized any software development costs in fiscal years 2013, 2012 and 2011.

We have entered into agreements under which certain R&D costs are eligible for reimbursement. Amounts reimbursed under this arrangement are offset against R&D expenses. During fiscal years 2013, 2012 and 2011, we offset $2.0 million, $4.0 million and $5.0 million, respectively, of R&D expenses in connection with such agreements.

Advertising Costs, Policy [Policy Text Block]

Advertising Expenses—We expense advertising costs as incurred. Advertising expenses for fiscal years 2013, 2012 and 2011 were immaterial.

Comprehensive Income, Policy [Policy Text Block]

Comprehensive Income (Loss)—Comprehensive income (loss) includes charges or credits to equity related to changes in unrealized gains or losses on marketable securities, net of taxes. Comprehensive income (loss) for fiscal years 2013, 2012 and 2011 has been disclosed within the consolidated statements of comprehensive income (loss).

Foreign Currency Transactions and Translations Policy [Policy Text Block]

Foreign Currency—The accounts of foreign subsidiaries are remeasured to U.S. dollars for financial reporting purposes by using the U.S. dollar as the functional currency and exchange gains and losses are reported in income and expenses. These currency gains or losses are reported in interest income and other, net in the consolidated statements of operations. Monetary balance sheet accounts are remeasured using the current exchange rate in effect at the balance sheet date. For non-monetary items, the accounts are measured at the historical exchange rate. Revenues and expenses are remeasured at the average exchange rates for the period. Foreign currency transaction losses were immaterial for fiscal years 2013, 2012 and 2011.

Concentration Risk, Credit Risk, Policy [Policy Text Block]

Concentration of Credit Risk and Significant Customers—Financial instruments potentially subjecting us to concentrations of credit risk consist primarily of cash, cash equivalents, short-term marketable securities, accounts receivable and long-term investments. The majority of our sales are derived from distributors and manufacturers in the communications, industrial, storage and computer industries. We perform ongoing credit evaluations of our customers and generally do not require collateral for sales on credit. We maintain allowances for potential credit losses, and such losses have been within management’s expectations. Charges to bad debt expense were insignificant for fiscal years 2013, 2012 and 2011. Our policy is to invest our cash, cash equivalents and short-term marketable securities with high credit quality financial institutions and limit the amounts invested with any one financial institution or in any type of financial instrument. We do not hold or issue financial instruments for trading purposes.

We sell our products to distributors and OEMs throughout the world. Future Electronics, Inc. (“Future”), a related party, has been and continues to be our largest distributor. See “Note 19 — Segment and Geographic Information,” for distributors who accounted for more than 10% of net sales and accounts receivable.

Concentration of Other Risks—The majority of our products are currently fabricated by our foundry suppliers and are assembled and tested by third-party subcontractors located in Asia. A significant disruption in the operations of one or more of these subcontractors could impact the production of our products for a substantial period of time which could result in a material adverse effect on our business, financial condition and results of operations.

Fair Value Measurement, Policy [Policy Text Block]

Fair Value of Financial Instruments—We estimate the fair value of our financial instruments by using available market information and valuation methodologies considered to be appropriate. However, considerable judgment is required in interpreting market data to develop the estimates of fair value. The use of different market assumptions and/or estimation methodologies could have a material effect on estimated fair value amounts. The estimated fair value of our cash equivalents, short-term marketable securities, accounts receivable, accounts payable and accrued liabilities presented in the consolidated balance sheets at March 31, 2013, April 1, 2012 and March 27, 2011 was not materially different from the carrying values due to the relatively short periods to maturity of the instruments.

Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]

Stock-Based Compensation—The estimated fair value of the equity-based awards, less expected forfeitures, is amortized over the awards’ vesting period on a straight-line basis. Determining the fair value of stock-based awards at the grant date requires considerable judgment, including estimating expected volatility, forfeiture rate, expected term and risk-free interest rate. If factors change and we employ different assumptions, stock-based compensation expense may differ significantly from what we have recorded in the prior years. In addition, we follow the “with-and-without” intra-period allocation approach in our tax attribute calculations.

New Accounting Pronouncements, Policy [Policy Text Block]

Recent Accounting Pronouncements 

In June 2011, the Financial Accounting Standards Board (“FASB”) issued an update to the authoritative guidance for comprehensive income. This update requires that all non-owner changes in stockholders’ equity be presented either in a single continuous statement of comprehensive income or in two separate but consecutive statements. This update is effective in fiscal years, and interim periods within those years, beginning after December 15, 2011. As a result, we have separately presented the Statements of Comprehensive Income beginning the fiscal quarter ended July 1, 2012, which did not have an impact on our financial position, results of operations or cash flows.

In July 2012, the FASB issued amended standards to simplify how entities test indefinite-lived intangible assets for impairment which improve consistency in impairment testing requirements among long-lived asset categories. These amended standards permit an assessment of qualitative factors to determine whether it is more likely than not that the fair value of an indefinite-lived intangible asset is less than its carrying value. For assets in which this assessment concludes it is more likely than not that the fair value is more than its carrying value, these amended standards eliminate the requirement to perform quantitative impairment testing as outlined in the previously issued standards. These amended standards are effective for annual and interim impairment tests performed for fiscal years beginning after September 15, 2012, with early adoption permitted. We do not expect the adoption of this guidance to have a material impact on our consolidated financial statements.

In February 2013, the FASB issued amended standards to improve the reporting of reclassifications out of accumulated other comprehensive income by requiring an entity to report their corresponding effect(s) on net income. These amended standards are effective for annual reporting periods beginning after December 15, 2012. We do not expect the adoption of this guidance to have a material impact on our consolidated financial statements.