We offer warranties on certain products and record a liability for the estimated
future costs associated with potential warranty claims. These warranty costs are
reflected in our consolidated statement of operations and comprehensive income
within cost of revenues. Our warranties are in effect for 12 months from the
distributors' purchase date of the product. Our estimates of future warranty
costs are largely based on historical experience of product failure rates,
material usage and service delivery costs incurred in correcting product
failures. Our operating results could be materially and adversely affected if
future warranty claims exceed historical experiences and we are not able to
recover costs from our contract manufacturers.
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Allowance for Doubtful Accounts We record an allowance for doubtful accounts for estimated probable losses on uncollectible accounts receivable. In estimating the allowance, management considers, among other factors, the aging of the accounts receivable, our historical write offs, the credit worthiness of each distributor based on payment history and general economic conditions. Income Taxes We account for income taxes in accordance with accounting guidance which requires recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in our financial statements or tax returns. Deferred tax assets and liabilities are determined based on the temporary difference between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. We establish valuation allowances when necessary to reduce deferred tax assets to the amount we expect to realize. The assessment of whether or not a valuation allowance is required often requires significant judgment including current operating results, the forecast of future taxable income and ongoing prudent and feasible tax planning initiatives. In addition, our calculation of our tax liabilities involves dealing with uncertainties in the application of complex tax regulations. We may be subject to income tax audits in each of the jurisdictions in which we operate and, as a result, must also assess exposures to any potential issues arising from current or future audits of current and prior years' tax returns. Accordingly, we must assess such potential exposures and, where necessary, provide a reserve to cover any expected loss. To the extent that we establish a reserve, our provision for income taxes would be increased. We review our potential liabilities periodically and, if necessary, record an additional charge in our provision for taxes in the period in which we determine that tax liability is greater than our original estimate. If we ultimately determine that payment of these amounts is unnecessary, we reverse the liability and recognize a tax benefit during the period in which we determine that the liability is no longer necessary. Stock-based Compensation We record stock-based awards at fair value as of the grant date and recognize expense ratably on a straight-line basis over the requisite service period, which is generally the vesting term of the awards. We estimate the fair value of stock option awards on the grant date using the Black-Scholes option pricing model. Restricted stock units are valued based on the fair value of our common stock on the date of grant. Since our initial public offering on
October 14, 2011, the fair value of our common stock is determined using the closing market price of our common stock as of the date of grant.