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Note 1 - Organization and Summary of Significant Accounting Policies
12 Months Ended
Dec. 31, 2018
Notes to Financial Statements  
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
1.
Organization and Summary of Significant Accounting Policies
 
Inphi Corporation (the “Company”), a Delaware corporation, was incorporated in
November 2000.
The Company is a fabless provider of high-speed analog and mixed signal semiconductor solutions for the communications and datacenter markets. The Company’s semiconductor solutions are designed to address bandwidth bottlenecks in networks, maximize throughput and minimize latency in computing environments and enable the rollout of next generation communications and datacenter infrastructures. In addition, the semiconductor solutions provide a vital high-speed interface between analog signals and digital information in high-performance systems such as telecommunications transport systems, enterprise networking equipment and datacenters.
 
On
August 4, 2016,
the Company completed the sale of the memory product business to Rambus Inc. (Rambus) for
$90,000.
The Company's consolidated financial statements and accompanying notes for
2016
has been retrospectively reclassified to present the results of operations of the memory product business as discontinued operations. For more information on discontinued operations, see Note
3.
 
On
December 12, 2016,
the Company completed the acquisition of ClariPhy Communications, Inc. (ClariPhy) for
$303,661
in cash. The revenue and expenses of ClariPhy are included in the consolidated statements of income (loss) from
December 12, 2016.
For more information on acquisitions, see Note
2.
 
The Company is subject to certain risks and uncertainties and believes changes in any of the following areas could have a material adverse effect on the Company’s future financial position or results of operations or cash flows: ability to sustain profitable operations due to losses incurred and accumulated deficit in prior years, dependence on a limited number of customers for a substantial portion of revenue, product defects, risks related to intellectual property matters, lengthy sales cycle and competitive selection process, lengthy and expensive qualification process, ability to develop new or enhanced products in a timely manner, market development of and demand for the Company’s products, reliance on
third
parties to manufacture, assemble and test products and ability to compete.
 
Basis of Presentation
 
The accompanying consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) and include the accounts of Inphi, ClariPhy and subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
 
 
Business Combinations
 
The Company accounts for acquisitions of business using the purchase method of accounting, which requires the Company to recognize separately from goodwill the assets acquired and the liabilities assumed at their acquisition date fair values. While the Company uses its best estimates and assumptions to accurately value assets acquired and liabilities assumed at the acquisition date as well as contingent consideration, where applicable, the estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which
may
be up to
one
year from the acquisition date, the Company
may
record adjustments to the assets acquired and liabilities assumed with the corresponding offset to goodwill. Upon the conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to the consolidated statements of income (loss).
 
Accounting for business combinations requires management to make significant estimates and assumptions, especially at the acquisition date including the Company’s estimates for intangible assets, contractual obligations assumed and pre-acquisition contingencies where applicable. Although the Company believes the assumptions and estimates made in the past have been reasonable and appropriate, they are based in part on historical experience and information obtained from the management of the acquired companies and are inherently uncertain. Critical estimates in valuing certain of the intangible assets the Company acquired include future expected cash flows from product sales, customer contracts and acquired technologies, expected costs to develop in-process research and development (IPR&D) into commercially viable products and estimated cash flows from the projects when completed and discount rates. Unanticipated events and circumstances
may
occur that
may
affect the accuracy or validity of such assumptions, estimates or actual results.
 
Use of Estimates
 
The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.
 
On an ongoing basis, management evaluates its estimates, including those related to (i) the collectibility of accounts receivable and allowance for distributors’ price discounts; (ii) write-down for excess and obsolete inventories; (iii) warranty obligations; (iv) the value assigned to and estimated useful lives of long-lived assets; (v) the realization of tax assets and estimates of tax liabilities and tax reserves; (vi) the valuation of equity securities; (vii) amounts recorded in connection with acquisitions; (viii) recoverability of intangible assets and goodwill; and (ix) the recognition and disclosure of fair value of convertible debt and contingent liabilities. These estimates are based on historical data and experience, as well as various other factors that management believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are
not
readily apparent from other sources. The Company engages
third
party valuation specialists to assist with estimates related to the valuation of financial instruments and assets associated with various contractual arrangements, and valuation of assets acquired in connection with acquisitions. Such estimates often require the selection of appropriate valuation methodologies and models, and significant judgment in evaluating ranges of assumptions and financial inputs. Actual results
may
differ from those estimates under different assumptions or circumstances.
 
Foreign Currency Translation
 
The Company and its subsidiaries use the U.S. dollar as its functional currency. Foreign currency assets and liabilities are remeasured into U.S. dollars at the end-of-period exchange rates except for non-monetary assets and liabilities, which are remeasured at historical exchange rates. Revenue and expenses are remeasured at the exchange rate in effect during the period the transaction occurred, except for those expenses related to balance sheet amounts, which are remeasured at historical exchange rates. Gains or losses from foreign currency transactions are included in the Consolidated Statements of Income (Loss) as part of “Other income, net”. Foreign currency gain (loss) in
2018,
2017
and
2016
were (
$135
),
$22
and (
$434
), respectively.
 
Cash and Cash Equivalents
 
The Company considers all highly liquid investments with an original or remaining maturity of
three
months or less at the date of purchase to be cash equivalents. The Company maintains its cash and cash equivalents with major financial institutions and, at times, such balances with any
one
financial institution
may
exceed Federal Deposit Insurance Corporation insurance limits. Cash equivalents primarily consist of money market funds.
 
Fair Market Value of Financial Instruments
 
The carrying amount reflected in the balance sheet for cash and cash equivalents, accounts receivable, prepaid and other current assets, accounts payable, accrued expenses and other current liabilities, approximate fair value due to the short-term nature of these financial instruments.
 
Investments
 
Investments in marketable securities consist of available-for-sale securities. These investments are recorded at fair value with changes in fair value, net of applicable taxes, recorded as unrealized gains (losses) as a component of accumulated other comprehensive income in stockholders' equity. Realized gains and losses are included in Other income, net. The cost basis for realized gains and losses on available-for-sale securities is determined on a specific identification basis. The Company periodically evaluates whether declines in fair values of its investments below their book values are other-than-temporary. When the fair value is lower than the amortized cost, the Company considers whether: (
1
) it has the intent to sell the security; (
2
) it is more likely than
not
that it will be required to sell the security before recovery; or (
3
) it expects to recover the entire amortized cost basis of the security. If the Company intends to sell the security or it is more likely than
not
that it will be required to sell the security, the entire difference between the amortized cost and fair value is recognized in Other income, net. If the Company does
not
intend to sell a security and it is
not
more likely than
not
that it will be required to sell the security but the security has suffered an impairment related to credit, the credit loss is bifurcated from the total decline in value and recorded in Other income, net with the remaining portion recorded within accumulated other comprehensive income in stockholders’ equity. Investments are made based on the Company’s investment policy which restricts the types of investments that can be made. The Company classified available-for-sale securities as short-term as the investments are available to be used in current operations.
 
On
January 1, 2018,
the Company adopted ASU
2016
-
01,
Financial Instruments – Recognition and Measurement of Financial Assets and Financial Liabilities, which changed the way the Company accounts for non-marketable equity investments. The Company adjusts the carrying value of non-marketable equity investments to fair value upon observable transactions for identical or similar investments of the same issuer or impairment (referred to as the measurement alternative). All gains and losses on non-marketable equity investments, realized and unrealized, are recognized in Other income, net. There was
no
cumulative effect adjustment upon adoption of this guidance.
 
 
Inventories
 
Inventories are stated at the lower of cost and net realizable value. Cost is computed using standard cost, which approximates actual cost, on a
first
-in,
first
-out basis. Inventories are reduced for write-downs based on periodic reviews for evidence of slow-moving or obsolete parts. The write-down is based on comparison between inventory on hand and forecasted customer demand for each specific product. Once written down, inventory write-downs are
not
reversed until the inventory is sold or scrapped. Inventory write-downs are also established when conditions indicate that the net realizable value is less than cost due to physical deterioration, technological obsolescence, changes in price level or other causes. Inventory valuation reserves were
$6,188
and
$3,133
as of
December 
31,
2018
and
2017,
respectively.
 
Property and Equipment
 
Property and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization is provided on property and equipment over the estimated useful lives on a straight-line basis. Leasehold improvements are amortized on a straight-line basis over the shorter of their estimated useful lives or lease terms. Repairs and maintenance are charged to expense as incurred. Useful lives by asset category are as follows:
 
Asset Category
 
Years
 
Office equipment
   
 
3
 
 
Software
   
 
3
 
 
Leasehold improvements
   
Shorter of lease term or estimated useful life
 
Production equipment
   
2
-
5
 
Computer equipment
   
 
5
 
 
Lab equipment
   
 
5
 
 
Furniture and fixtures
   
 
7
 
 
 
 
Intangible Assets
 
Intangible assets represent rights acquired for developed technology, customer relationships, trademark, patents and IPR&D in connection with the business acquisitions. Intangible assets with finite useful lives are amortized over periods ranging from
one
to
ten
years using a method that reflects the pattern in which the economic benefits of the intangible asset are consumed, or if that pattern cannot be reliably determined, using a straight-line amortization method. Acquired IPR&D is capitalized and amortization commences upon completion of the underlying projects. If any of the projects are abandoned, the Company would be required to impair the related IPR&D asset.
 
Impairment of Long-lived Assets and Goodwill
 
Long-lived Assets
 
The Company assesses the impairment of long-lived assets, which consist primarily of property and equipment and intangible assets, whenever events or changes in circumstances indicate that such assets might be impaired and the carrying value
may
not
be recoverable. Events or changes in circumstances that
may
indicate that an asset is impaired include significant decreases in the market value of an asset, significant underperformance relative to expected historical or projected future results of operations, a change in the extent or manner in which an asset is utilized, significant declines in the estimated fair value of the overall Company for a sustained period, shifts in technology, loss of key management or personnel, changes in the Company’s operating model or strategy and competitive forces.
 
If events or changes in circumstances indicate that the carrying amount of an asset
may
not
be recoverable and the expected undiscounted future cash flows attributable to the asset are less than the carrying amount of the asset, an impairment loss equal to the excess of the asset’s carrying value over its fair value is recorded. Fair value is determined based on the present value of estimated expected future cash flows using a discount rate commensurate with the risk involved, quoted market prices or appraised values, depending on the nature of the assets.
 
Goodwill
 
Goodwill is recorded when the consideration paid for a business acquisition exceeds the fair value of net tangible and intangible assets acquired. Goodwill is measured and tested for impairment on an annual basis during the
fourth
fiscal quarter or more frequently if the Company believes indicators of impairment exist.  
 
To review for impairment, the Company
first
assesses qualitative factors to determine whether events or circumstances lead to a determination that it is more likely than
not
that the fair value of any of its reporting unit is less than its carrying amount. The qualitative assessment of the recoverability of goodwill, whether performed annually or based on specific events or circumstances, considers various macroeconomic, industry-specific and company-specific factors. Those factors include: (i) severe adverse industry or economic trends; (ii) significant company-specific actions, including exiting an activity in conjunction with restructuring of operations; (iii) current, historical or projected deterioration of its financial performance; or (iv) a sustained decrease in its market capitalization below its net book value. After assessing the totality of events and circumstances, if the Company determines that it is
not
more likely than
not
that the fair value of any of its reporting unit is less than its carrying amount,
no
further assessment is performed. If however, the Company determines that it is more likely than
not
that the fair value of any of the reporting unit is less than its carrying amount, the Company calculates the fair value of that reporting unit and compares the fair value to the reporting unit’s net book value. If the carrying amount of goodwill exceeds the implied fair value of that goodwill, an impairment loss is recognized in an amount equal to the excess. There was
no
impairment of goodwill in
2018,
2017
and
2016.
 
Internal Use Software Costs
 
Certain external computer software costs acquired for internal use are capitalized. Training costs and maintenance are expensed as incurred, while upgrades and enhancements are capitalized if it is probable that such expenditures will result in additional functionality. Capitalized costs are included within property and equipment. If a cloud computing arrangement includes a software license, then the Company accounts for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does
not
include a software license, the Company accounts for the arrangement as a service contract.
 
Revenue Recognition
 
Prior to
January 1, 2018,
the Company recognized revenue when there was persuasive evidence of an arrangement, delivery had occurred, the fee was fixed or determinable, and collection was reasonably assured.
 
On
January 1, 2018,
the Company adopted Accounting Standards Update (ASU)
2014
-
09,
Revenue from Contract with Customers (Topic
606
), using the modified retrospective method applied to those contracts which were
not
completed as of
January 1, 2018.
The adoption of this guidance resulted in
no
cumulative effect adjustment as of
January 1, 2018.
Starting
January 1, 2018,
the Company recognizes revenue on sales to distributors upon shipment and transfer of control (known as “sell-in” revenue recognition), rather than deferring recognition until distributors report that they have sold the products to their customers (known as “sell-through” revenue recognition). The impact of the adoption on revenue and cost of revenue for the year ended
December 31, 2018
was an increase of
$3,778
and
$779,
respectively. The deferred revenue and inventories decreased by
$3,778
and
$779
as of
December 31, 2018,
respectively. Results for reporting periods beginning after
January 1, 2018
are presented under the new revenue guidance, while prior periods were
not
retrospectively adjusted and continue to be reported in accordance with the Company’s historic revenue recognition accounting.
 
The following table shows revenue by geography, based on the shipping location of customers:
 
   
Year Ended December 31,
 
   
201
8
   
201
7
   
201
6
 
   
(in thousands)
 
China
  $
113,684
    $
114,168
    $
103,071
 
United States
   
87,545
     
92,620
     
29,976
 
Japan
   
7,492
     
29,061
     
36,308
 
Thailand
   
40,884
     
45,205
     
35,837
 
Other
   
44,885
     
67,147
     
61,085
 
    $
294,490
    $
348,201
    $
266,277
 
 
The Company recognizes revenue when the control of the promised goods or services is transferred to customers in an amount that reflects the consideration the Company expects to receive in exchange for such goods or services.
 
Product Revenue
 
The Company’s products are fully functional at the time of shipment and do
not
require additional production, modification, or customization. The Company recognizes revenue upon transfer of control at a point in time when title transfers either upon shipment to or receipt by the customer, net of accruals for estimated sales returns and allowances. Sales and other taxes the Company collects are excluded from revenue. The fee is based on specific products and quantities to be delivered at specified prices, which is evidenced by a customer purchase order or other persuasive evidence of an arrangement. Certain distributors
may
receive a credit for the price discounts associated with the distributors' customers that purchased those products. The Company estimates the extent of these distributor price discounts at each reporting period to reduce accounts receivable and revenue. Although the Company accrues an estimate of distributor price discounts, the Company does
not
issue these discounts to the distributor until the inventory is sold to the distributors' customers. As of
December 31, 2018,
the estimated price discount was
$1,634.
Payment terms of customers are typically
30
to
60
days after invoice date. The Company’s products are under warranty against defects in material and workmanship generally for a period of
one
or
two
years. The Company accrues for estimated warranty costs at the time of sale based on anticipated warranty claims and actual historical warranty claims experience including knowledge of specific product failures that are outside of the Company’s typical experience.
 
Other Revenue
 
Occasionally, the Company enters into license and development agreements with some of its customers and recognizes revenue from these agreements upon completion and acceptance by the customer of contract deliverables by milestones or as services are provided, depending on the terms of the arrangement. Revenue is deferred for any amounts billed or received prior to completion of milestones or delivery of services. The Company believes the milestone method best depicts efforts expended to transfer services to the customers. Certain contracts
may
include multiple performance obligations for which the Company allocates revenues to each performance obligation based on relative stand-alone selling price. The Company determines stand-alone selling prices based on the adjusted market assessment approach or residual approach, if applicable.
 
The Company does
not
disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of
one
year or less or (ii) contracts for which the Company recognizes revenue at the amount to which it has the right to invoice for services performed.
 
Revenue from non-product sales was approximately
3%,
3%
and
1%
of total revenue for the years ended
December 31, 2018,
2017,
and
2016,
respectively.
 
The Company monitors the collectability of accounts receivable primarily through review of the accounts receivable aging. The Company’s policy is to record an allowance for doubtful accounts based on specific collection issues identified, aging of underlying receivables and historical experience of uncollectible balances.
 
Cost of Revenue
 
Cost of revenue includes cost of materials, such as wafers processed by
third
-party foundries, cost associated with packaging and assembly, testing and shipping, cost of personnel, including stock-based compensation, and equipment associated with manufacturing support, logistics and quality assurance, warranty cost, amortization and impairment of developed technology, amortization of step-up values of inventory, write-down of inventories, amortization of production mask costs, overhead and an allocated portion of occupancy costs.
 
Warranty
 
The Company’s products are under warranty against defects in material and workmanship generally for a period of
one
or
two
years. The Company accrues for estimated warranty cost at the time of sale based on anticipated warranty claims and actual historical warranty claims experience including knowledge of specific product failures that are outside of the Company’s typical experience. The warranty obligation is determined based on product failure rates, cost of replacement and failure analysis cost. If actual warranty costs differ significantly from these estimates, adjustments
may
be required in the future. As of both
December 31, 2018
and
2017,
the warranty liability was
$110
.
 
 
Research and Development Expense
 
Research and development expense consists of costs incurred in performing research and development activities including salaries, stock-based compensation, employee benefits, occupancy costs, pre-production engineering mask costs, impairment of in-process research and development, overhead costs and prototype wafer, packaging and test costs. Research and development costs are expensed as incurred. The Company enters into development agreements with some of the Company’s customers. Recoveries from nonrecurring engineering services from early stage technology are recorded as an offset to product development expense incurred in support of this effort and serve as a mechanism to partially recover development expenditures. These reimbursements are recognized upon completion and acceptance by the customer of contract deliverables or milestones. The Company recorded approximately
$0,
$3,000
and
$2,400
as offset to research and development expense for the years ended
December 31, 2018,
2017
and
2016,
respectively.
 
Sales and Marketing Expense
 
Sales and marketing expense consists of salaries, stock-based compensation, employee benefits, travel, trade show costs, amortization of intangibles and others. The Company expenses sales and marketing costs as incurred. Advertising expenses for the years ended
December 
31,
2018,
2017
and
2016
were
not
material.
 
General and Administrative Expense
 
General and administrative expense consists of salaries, stock-based compensation, employee benefits and expenses for executive management, legal, finance and others. In addition, general and administrative expense includes fees for professional services and occupancy costs. These costs are expensed as incurred.
 
Income Taxes
 
Deferred tax assets and liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities, and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. The Company recognizes the deferred income tax effects of a change in tax rates in the period of enactment. The Company must also make judgments in evaluating whether deferred tax assets will be recovered from future taxable income. To the extent that it believes that recovery is
not
likely, the Company must establish a valuation allowance. The carrying value of the Company’s net deferred tax asset is based on whether it is more likely than
not
that the Company will generate sufficient future taxable income to realize these deferred tax assets. A valuation allowance is established for deferred tax assets which the Company does
not
believe meet the “more likely than
not”
criteria. The Company’s judgments regarding future taxable income
may
change over time due to changes in market conditions, changes in tax laws, tax planning strategies or other factors. If the Company’s assumptions and consequently its estimates change in the future, the valuation allowance the Company has established
may
be increased or decreased, resulting in a material respective increase or decrease in income tax expense (benefit) and related impact on the Company’s reported net income (loss).
 
In accordance with FASB’s guidance on Accounting for Uncertainty in Income Taxes, the Company performs a comprehensive review of uncertain tax positions regularly. In this regard, an uncertain tax position represents an expected treatment of a tax position taken in a filed tax return, or planned to be taken in a future tax return or claim, which has
not
been reflected in measuring income tax expense for financial reporting purposes. Until these positions are sustained by the taxing authorities, the Company does
not
recognize the tax benefits resulting from such positions and reports the tax effects as a liability for uncertain tax positions in the consolidated financial statements. The Company recognizes potential interest and penalties on uncertain tax positions within the provision (benefit) for income taxes on the consolidated statement of income.
 
On
December 22, 2017,
the Tax Cuts and Jobs Act (the “Tax Reform Act”) was signed into law. The Tax Reform Act contains significant changes to U.S. federal corporate income taxation, including a reduction of the corporate tax rate from
35%
to
21%
effective
January 1, 2018,
a
one
-time transition tax on deemed mandatory repatriation of accumulated earnings and profits of foreign subsidiaries in conjunction with the elimination of U.S. tax on dividend distributions from foreign subsidiaries, and a temporary
100%
first
-year depreciation deduction for certain capital investments. The effect of the tax law changes must be recognized in the period of enactment. As a result of the change in tax rate, the deferred tax assets and liabilities were required to be remeasured to reflect their value at a lower tax rate of
21%.
Staff Accounting Bulletin
118
(“SAB
118”
) allows for a measurement period of up to
one
year after the enactment date of the new tax legislation to finalize the recording of the related tax impacts. In accordance with SAB
118,
as of
December 31, 2017,
the Company made a provisional estimate of the remeasurement of the federal deferred tax assets and liabilities to reflect the reduced U.S. statutory corporate tax rate to
21%,
the mandatory repatriation income which was fully absorbed by the U.S. net operating loss, the related valuation allowance offset, and valuation allowance release on deferred tax assets for the federal AMT credit that was made refundable by the Tax Reform Act. During
2018,
the Company elected to account for global intangible low-taxed income (“GILTI”) as a period cost in the year the tax is incurred and made changes to its provisional estimates previously recorded for the mandatory repatriation upon filing of its
2017
U.S. income tax return. The change in the mandatory repatriation income was fully absorbed by the U.S. net operating loss, which is subject to valuation allowance, and resulted in
no
current tax liability. This measurement period adjustment had
no
net tax effect after the offsetting change to the valuation allowance. At
December 31, 2018,
the Company completed the accounting for all of the enactment-date income tax effects of the Tax Reform Act. See Note
11
for additional information.
 
Stock-Based Compensation
 
Stock-based compensation for stock option and restricted stock units issued to the Company’s employees is measured at the grant date based on the fair value of the award and is recognized as expense over the requisite service period, which is the vesting period, on a straight-line basis. The fair value of restricted stock units is based on the fair market value of the Company’s common stock on the date of grant. If the award has a market condition, the Company estimates the fair value using Monte Carlo simulation model and recognize compensation ratably over the service period.
 
Historically, the Company granted stock options to employees and the Company uses the Black-Scholes option pricing model for valuing stock option awards granted to employees and directors at the grant date. Determining the fair value of stock option awards at the grant date requires the input of various assumptions, including the fair value of the underlying common stock, expected future share price volatility, expected term, risk-free interest rate and dividend rate. Changes in these assumptions can materially affect the fair value of the options. The Company based its estimate of expected volatility on the volatility of similar entities whose share prices are publicly available. The risk-free interest rate is based on the U.S. Treasury yields in effect at the time of grant for periods corresponding to the expected life of the options. The weighted average expected life of options was calculated using the simplified method. This decision was based on the lack of relevant historical data due to the Company’s limited experience. The expected dividend yield is
zero
because the Company has
not
historically paid dividends and has
no
present intention to pay dividends. The Company establishes the estimated forfeiture rates based on historical experience. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service period which is equal to the vesting period.
 
The Company has elected to treat share-based payment awards with graded vesting schedules and time-based service conditions as single awards and recognizes stock-based compensation expense on a straight-line basis (net of estimated forfeitures) over the requisite service period.
 
The Company recognizes non-employee stock-based compensation expense based on the estimated fair value of the equity instrument determined using the Black-Scholes option pricing model. Management believes that the fair value of the underlying stock award is more reliably measured than the fair value of the services received. The fair value of each non-employee variable stock award is re-measured each period until a commitment date is reached, which is generally the vesting date.
 
Earnings per Share
 
Basic earnings per share is calculated by dividing income allocable to common stockholders by the weighted average number of shares of common stock outstanding during the period. Diluted earnings per share is calculated by dividing the net income allocable to common stockholders by the weighted average number of common shares outstanding, adjusted for the effects of potentially dilutive common stock, which are comprised of stock options, restricted stock units, employee share purchase plan and the shares that could be issued upon conversion of the Company’s convertible debt. The capped call options in connection with the issuance of the convertible notes are excluded from the calculation of diluted earnings per share as their impact is always anti-dilutive.
 
Segment Information
 
The Company operates in
one
reportable segment related to the design, development and sale of high-speed analog connectivity components that operate to maintain, amplify and improve signal integrity at high-speeds in a wide variety of applications. The Company’s chief operating decision-maker is its Chief Executive Officer, who reviews operating results on an aggregate basis and manages the Company’s operations as a single operating segment.
 
Recent Accounting Pronouncements
 
In
May 2014,
the FASB issued guidance on “Revenue from Contracts with Customers.” The new revenue recognition guidance provides a
five
-step analysis of transactions to determine when and how revenue is recognized. The guidance requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The FASB issued several updates to the guidance. The Company adopted the new revenue guidance effective
January 1, 2018,
using the modified retrospective transition method applied to those contracts which were
not
completed as of that date.
 
In
January 2016,
the FASB issued guidance that requires equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income. However, an entity
may
choose to measure equity investments that do
not
have readily determinable fair values at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. The guidance simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment. When a qualitative assessment indicates that impairment exists, an entity is required to measure the investment at fair value. The guidance eliminates the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet, and requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. The guidance also requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. Separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (that is, securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements is required under this guidance. The guidance further clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity’s other deferred tax assets. The Company adopted this guidance starting
January 1, 2018
and concluded that there was
no
cumulative effect adjustment required. The Company has elected to measure equity investments that do
not
have readily determinable fair values at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer (referred to as the measurement alternative). See Note
4
for further details.
 
In
February 2016,
the FASB issued guidance that requires companies that lease assets (lessees) to recognize on the balance sheet the assets and liabilities for the rights and obligations created by the leases with lease terms of more than
12
months. The FASB also issued additional updates. For leases less than
twelve
months, an entity is permitted to make an accounting policy election by class of underlying asset
not
to recognize lease assets and lease liabilities. If a lessee makes this election, it should recognize lease expense for such leases generally on a straight-line basis over the lease term. The Company intends to make this election, along with other available practical expedients. The guidance requires entities to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach or allows entities to initially apply the new lease standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The Company plans to adopt the new standard on the adoption date with an application date of
January 1, 2019
and recognize a cumulative-effect adjustment to the opening balance of accumulated deficit in the period of adoption. Based on the Company’s lease portfolio, which primarily consists of facility leases, as of
January 1, 2019,
the preliminary estimate of the impact of adopting the guidance is to increase both its total assets and total liabilities in the range of
$10,000
to
$12,000
.
The Company does
not
believe this guidance will materially affect the consolidated results of operations or its liquidity. The Company continues to finalize the implementation of new processes and the assessment of the impact of this adoption on its consolidated financial statements; therefore, the preliminary estimated impacts disclosed can change and the final impact will be known once the adoption is completed during the
first
quarter of
2019.
 
In
June 2016,
the FASB issued guidance which requires the credit losses related to debt securities classified as available-for sale to be presented as an allowance rather than as a write-down. This guidance is effective for the Company beginning after
December 15, 2019.
The Company is currently evaluating the impact that this new guidance will have on its consolidated financial statements and related disclosures.
 
In
August 2016,
the FASB issued guidance related to the classification of certain transactions on the statement of cash flows. The guidance is effective for calendar year-end public companies in
2018.
The adoption of this guidance did
not
have a material impact on the Company’s consolidated statements of cash flows.
 
In
January 2017,
the FASB issued guidance on the definition of a business. This guidance clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. This guidance is effective for calendar year-end public companies in
2018.
The adoption of this standard did
not
have a material impact on the Company’s consolidated financial statements.
 
In
January 2017,
the FASB issued guidance to simplify the measurement of goodwill by eliminating the Step
2
impairment test. Step
2
measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. The new guidance requires an entity to compare the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. The new guidance becomes effective for goodwill impairment tests in fiscal years beginning after
December 15, 2019,
though early adoption is permitted. The Company is currently evaluating the impact that this new guidance will have on its consolidated financial statements and related disclosures.
 
In
May 2017,
the FASB issued guidance to clarify when to account for a change to the terms or conditions of a share-based payment award as a modification. Under the guidance, modification accounting is required only if the fair value, the vesting conditions, or the classification of the award changes as a result of the change in terms or conditions. The guidance was effective for fiscal years beginning after
December 15, 2017.
The adoption of this guidance did
not
have a material impact on the Company’s consolidated financial statements and related disclosures.
 
In
February 2018,
the FASB issued guidance that allows an option to reclassify from accumulated other comprehensive income to retained earnings any stranded tax effects resulting from the Tax Cuts and Jobs Act (the "Tax Act"). The guidance will be effective for fiscal years beginning after
December 15, 2018,
though early adoption is permitted in any interim period after issuance of the update. The adoption of this guidance is
not
expected to have a material impact on the Company’s consolidated financial statements and related disclosures.
 
In
June 2018,
the FASB issued guidance to eliminate the separate guidance applicable to share-based payments to nonemployees. Under the new guidance, equity-classified share-based payment awards issued to nonemployees will be measured on the grant date, instead of being remeasured through the performance completion date (generally the vesting date), as required under the current guidance. The new guidance will also require recognition of compensation cost for awards with performance conditions when achievement of those conditions are probable, rather than upon their achievement. Further, the new guidance will eliminate the requirement to reassess the classification of nonemployee awards under the financial instruments literature upon vesting. The guidance will be effective for fiscal years beginning after
December 15, 2018.
The adoption of this guidance is
not
expected to have a material impact on the Company’s consolidated financial statements and related disclosures.
 
In
August 2018,
the FASB issued guidance that eliminates certain disclosure requirements for fair value measurements for all entities, requires public entities to disclose certain new information and modifies some disclosure requirements. The new guidance will
no
longer require disclosure of the amount of and reasons for transfers between Level
1
and Level
2
of the fair value hierarchy, but will require disclosure of the range and weighted average used to develop significant unobservable inputs for Level
3
fair value measurements. The guidance will be effective for fiscal years beginning after
December 15, 2019.
The Company is currently evaluating the impact that this new guidance will have on its consolidated financial statements and related disclosures.
 
In
August 2018,
the FASB issued guidance requiring a customer in a cloud computing arrangement that is a service contract to follow the internal use software guidance in Accounting Standards Codification (ASC)
350
-
40
to determine which implementation costs to capitalize as assets. Capitalized implementation costs are expensed over the term of the hosting arrangement beginning when the module or component of the hosting arrangement is ready for its intended use. The guidance will be effective for fiscal years beginning after
December 15, 2019.
The Company is currently evaluating the impact that this new guidance will have on its consolidated financial statements and related disclosures.
 
In
August 2018,
the SEC adopted the final rule under SEC Release
No.
33
-
10532,
Disclosure Update and Simplification, amending certain disclosure requirements that were redundant, duplicative, overlapping, outdated or superseded. In addition, the amendments expanded the disclosure requirements on the analysis of stockholders' equity for interim financial statements. Under the amendments, an analysis of changes in each caption of stockholders' equity presented in the balance sheet must be provided in a note or separate statement. The analysis should present a reconciliation of the beginning balance to the ending balance of each period for which a statement of comprehensive income is required to be filed. This final rule was effective on
November 5, 2018.
The Company adopted the rule in the
fourth
quarter of
2018
and the impact on its annual consolidated financial statements was
not
material.
 
In
November 2018,
the FASB issued amendments to guidance on “Collaborative Arrangements” and “Revenue from Contracts with Customers”, that require transactions in collaborative arrangements to be accounted for under “Revenue from Contracts with Customers” if the counterparty is a customer for a good or service (or bundle of goods and services) that is a distinct unit of account. The amendments also preclude entities from presenting consideration from transactions with a collaborator that is
not
a customer together with revenue recognized from contracts with customers. The Company is currently evaluating the impact that this new guidance will have on its consolidated financial statements and related disclosures.