On March 10, 2019, the Company entered into an Agreement and Plan of Merger (the "Merger Agreement") with NVIDIA Corporation, a Delaware corporation ("NVIDIA"), NVIDIA International Holdings Inc., a Delaware corporation and wholly owned subsidiary of NVIDIA ("Parent") and Teal Barvaz Ltd., a wholly owned subsidiary of Parent organized under the laws of the State of Israel and wholly owned subsidiary of Parent ("Merger Sub"). NVIDIA has agreed to guarantee the payment and performance obligations of Parent under the Merger Agreement. The Merger Agreement and the Merger (as defined below) have been approved by the boards of directors of the Company, NVIDIA, Parent and Merger Sub.

At the effective time of the Merger (the "Effective Time"), each ordinary share, par value NIS 0.0175 per share, of the Company (a "Company Share") issued and outstanding immediately prior to the Effective Time, other than any shares owned by the Company, Parent and their respective subsidiaries or any shares held in the Company’s treasury, will be deemed to have been transferred to the Parent in exchange for the right to receive $125.00 in cash, without interest and subject to applicable withholding taxes.

The Merger Agreement contains customary representations, warranties and covenants. The consummation of the Merger is conditioned on the receipt of the approval of the Company’s shareholders, as well as the satisfaction of other customary closing conditions, including domestic and foreign regulatory approvals and performance in all material respects by each party of its obligations under the Merger Agreement. In June 2019, the Company’s shareholders approved the consummation of the Merger and the Company received regulatory approvals for the Merger from Mexico in July 2019 and from the European Commission in December 2019. In addition, the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, in connection with the proposed acquisition expired in May 2019. Discussions with State Administration for Market Regulation, the China regulatory agency, are progressing and the Company believes the closing will likely occur in the early part of calendar 2020.

The Merger Agreement contains certain customary termination rights by either the Company or Parent, including if the Merger is not consummated by December 10, 2019 (the "Outside Date"), subject to two three-month extensions in order to obtain required regulatory approvals. Pursuant to the first of those three-month extensions, the Outside Date has been extended to March 10, 2020. If the Merger Agreement is terminated under certain circumstances, including termination by the Company to enter into a superior proposal, a termination by Parent following a change of the Company’s board of directors’ recommendation or a termination by Parent as a result of a willful material breach of the Merger Agreement’s no-solicitation obligations by the Company, the Company will be obligated to pay to Parent a termination fee equal to $225.0 million in cash. If the Merger Agreement is terminated under certain circumstances involving the failure to obtain certain regulatory approvals, Parent will be obligated to pay the Company a termination fee equal to $350.0 million in cash.

The Company is subject to all of the risks inherent in a company which operates in the dynamic and competitive semiconductor industry. Significant changes in any of the following areas could have a material adverse impact on the Company's financial position and results of operations; unpredictable volume or timing of customer orders; ordered product mix; the sales outlook and purchasing patterns of the Company's customers based on consumer demands and general economic conditions; loss of one or more of the Company's customers; decreases in the average selling prices of products or increases in the average cost of finished goods; the availability, pricing and timeliness of delivery of components used in the Company's products; reliance on a limited number of subcontractors to manufacture, assemble, package and production test the Company's products; the Company's ability to successfully develop, introduce and sell new or enhanced products in a timely manner; product obsolescence and the Company's ability to manage product transitions; the timing of announcements or introductions of new products by the Company's competitors, and the Company's ability to successfully integrate acquired businesses.

The preparation of financial statements in accordance with accounting principles generally accepted in the United States of America, ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the dates of the financial statements and the reported amounts of net revenue and expenses in the reporting periods. The Company regularly evaluates estimates and assumptions related to revenue recognition, allowances for doubtful accounts, allowances for price adjustments, investment valuation, warranty reserves, inventory reserves, share-based compensation expense, long-term asset valuations, useful lives of property, equipment, and intangibles, right-of-use ("ROU") assets and liabilities, accounting for business combinations, goodwill and purchased intangible asset valuation, investments in privately-held companies, accounting and fair value of financial instruments and derivatives, deferred income tax asset valuation, uncertain tax positions, litigation and other loss contingencies. These estimates and assumptions are based on current facts, historical experience and various other factors that the Company believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities and the recording of revenue, costs and expenses that are not readily apparent from other sources. The actual results that the Company experiences may differ materially and adversely from the Company's original estimates. To the extent there are material differences between the estimates and actual results, the Company's future results of operations will be affected.

As of December 31, 2018 and 2017, the Company maintained certain cash amounts that were restricted as to withdrawal or use over the long-term. The cash secured bank guarantees primarily issued against long-term tenancy agreements. The Company did not maintain any restricted cash amounts as of December 31, 2019. The long-term restricted cash balances were reported in deferred taxes and other long-term assets on the balance sheets, and were included in the ending balance of cash, cash equivalents and restricted cash in the statement of cash flows for the years then ended. The following table provides a reconciliation of the cash and cash equivalents balances reported on the balance sheets and the cash, cash equivalents and restricted cash balances reported in the statements of cash flows:

The Company's short-term investments are classified as available-for-sale securities and are reported at fair value. Unrealized gains or losses are recorded in shareholders' equity and included in other comprehensive income ("OCI"). The Company views its available-for-sale portfolio as available for use in its current operations. Accordingly, the Company has classified all investments in available for sale securities with readily available markets as short-term, even though the stated maturity date may be one year or more beyond the current balance sheet date, because of the intent and ability to sell these securities prior to maturity to meet liquidity needs or as part of a risk management program. The Company regularly reviews its investment portfolio and charges unrealized losses against net income when a decline in fair value is determined to be other-than-temporary. The Company reviews several factors to determine whether a loss is other-than-temporary. These factors include but are not limited to: (1) the length of time a security is in an unrealized loss position, (2) the extent to which fair value is less than cost, (3) the financial condition and near term prospects of the issuer and (4) our intent and ability to hold the security for a period of time sufficient to allow for any anticipated recovery in fair value.

The Company's financial instruments consist of cash equivalents, short-term investments and foreign currency derivative contracts. The fair value of a financial instrument is the amount that would be received in an asset sale or paid to transfer a liability in an orderly transaction between unaffiliated market participants. When there is no readily available market data, fair value estimates may be made by the Company, which may not necessarily represent the amounts that could be realized in a current or future sale of these assets.

The Company enters into foreign currency forward and option contracts with financial institutions to protect against foreign exchange risks, mainly the exposure to changes in the exchange rate of the NIS against the U.S. dollar that are associated with forecasted future cash flows and certain existing assets and liabilities. The Company's primary objective in entering into these arrangements is to reduce the volatility of earnings and cash flows associated with changes in foreign currency exchange rates. The program is not designated for trading or speculative purposes. The Company's derivative instruments expose the Company to credit risk to the extent that the counter-parties may be unable to meet the terms of the agreement. The Company seeks to mitigate such risk by limiting its counter-parties to major financial institutions and by spreading the risk across a number of major financial institutions. In addition, the potential risk of loss with any one counter-party resulting from this type of credit risk is monitored on an ongoing basis.

The Company accounts for its derivative instruments as either assets or liabilities and carries them at fair value. The accounting for changes in the fair value of a derivative depends on the intended use of the derivative and the resulting designation. For derivative instruments that hedge the exposure to variability in expected future cash flows that are designated as cash flow hedges, the effective portion of the unrealized gains or losses on the derivative instruments is reported as a component of accumulated other comprehensive income ("AOCI") in shareholders’ equity and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. The ineffective portion of the gains or losses on the derivative instruments, if any, is recognized in earnings in the current period. The derivative instruments that hedge the exposure to variability in the fair value of assets or liabilities are not currently designated as hedges for financial reporting purposes, and thus the gains or losses on such derivative instruments are recognized in earnings in the current period.

Financial instruments that potentially subject the Company to a concentration of credit risk consist of cash, cash equivalents, short-term investments and accounts receivable. Cash, cash equivalents and short-term investment balances are maintained with high quality financial institutions, the composition and maturities of which are regularly monitored by management. The Company's accounts receivable are derived from revenue earned from customers primarily located in North America, Europe and Asia. The Company performs ongoing credit evaluations of its customers' financial condition and, generally, requires no collateral from its customers. The Company maintains an allowance for doubtful accounts receivable based upon the expected collectability of accounts receivable. The Company reviews its allowance for doubtful accounts quarterly by assessing individual accounts receivable over a specific aging and amount, and all other balances based on historical collection experience and an economic risk assessment. If the Company determines that a specific customer is unable to meet its financial obligations to the Company, the Company provides an allowance for credit losses to reduce the receivable to the amount management reasonably believes will be collected. In addition, the Company maintains credit insurance for the majority of its accounts receivable balances.

Inventory includes finished goods, work-in-process and raw materials. Inventory is stated at the lower of cost (principally standard cost which approximates actual cost on a first-in, first-out basis) or net realizable value. Reserves for potentially excess and obsolete inventory are made based on management's analysis of inventory levels, future sales forecasts and market conditions. Once established, the original cost of the Company's inventory less the related inventory reserve represents the new cost basis of such products.

Property and equipment are stated at cost, net of accumulated depreciation. Depreciation is generally calculated using the straight-line method over the estimated useful lives of the related assets, which is three years for computer equipment and software, seven years for lab equipment, and seven years for office furniture and fixtures. Leasehold improvements and assets acquired under capital leases are amortized on a straight-line basis over the term of the lease, or the useful lives of the assets, whichever is shorter. Maintenance and repairs are charged to expense as incurred, and improvements are capitalized. When assets are retired or otherwise disposed of, the cost and accumulated depreciation or amortization are removed from the accounts and any resulting gain or loss is reflected in the results of operations in the period realized. The Company retires fully depreciated assets when they are no longer in use. As a result, $26.7 million and $16.6 million of cost and accumulated depreciation were removed from the accounts during the years ended December 31, 2019 and 2018, respectively. No gain or loss was recognized.

The Company accounts for business combinations using the acquisition method of accounting. The Company determines the recognition of intangible assets based on the following criteria: (i) the intangible asset arises from contractual or other rights; or (ii) the intangible asset is separable or divisible from the acquired entity and capable of being sold, transferred, licensed, returned or exchanged. The Company allocates the purchase price of business combinations to the tangible assets, liabilities and intangible assets acquired, including in-process research and development ("IPR&D"), based on their estimated fair values. The excess purchase price over those fair values is recorded as goodwill. The process of estimating the fair values requires significant estimates, especially with respect to intangible assets. Critical estimates in valuing certain intangible assets include, but are not limited to, future expected cash flows from customer contracts, customer lists and distribution agreements, acquired developed technologies, expected costs to develop IPR&D into commercially viable products, estimated cash flows from projects when completed and discount rates. The Company estimates fair value based upon assumptions that are believed to be reasonable, but which are inherently uncertain and unpredictable and, as a result, actual results may differ from estimates.

Goodwill represents the excess of the cost of acquired businesses over the fair market value of their identifiable net assets. The Company conducts a goodwill impairment qualitative assessment during the fourth quarter of each fiscal year or more frequently if facts and circumstances indicate that goodwill may be impaired. The goodwill impairment qualitative assessment requires the Company to perform an assessment to determine if it is more likely than not that the fair value of the business is less than its carrying amount. The qualitative assessment considers various factors, including the macroeconomic environment, industry and market specific conditions, market capitalization, stock price, financial performance, earnings multiples, budgeted-to-actual revenue performance from prior year, gross margin and cash flow from operating activities and issues or events specific to the business. If adverse qualitative trends are identified that could negatively impact the fair value of the business, the Company performs a "two step" goodwill impairment test. "Step one" is the identification of potential impairment. This involves comparing the fair value of each reporting unit, which the Company has determined to be the entity itself as one reporting unit, with its carrying amount including goodwill. If the fair value of a reporting unit exceeds its carrying amount, the goodwill of the reporting unit is considered not impaired and "Step two" of the impairment test is unnecessary. If the carrying amount of a reporting unit exceeds its fair value, "Step two" is performed. This involves comparing the carrying amount of goodwill to its implied fair value, which is determined to be the excess of the reporting unit's fair value over the fair value of its identifiable net assets other than goodwill. If the carrying amount of goodwill exceeds its implied fair value, an impairment exists and is recorded. As of December 31, 2019, the Company's qualitative assessment of goodwill impairment indicated that goodwill was not impaired.

Intangible assets represent acquired intangible assets including developed technology, customer relationships and IPR&D, as well as licensed technology. The Company amortizes its finite lived intangible assets over their useful lives using a method that reflects the pattern in which the economic benefits of the intangible assets are consumed or otherwise used, or, if that pattern cannot be reliably determined, using a straight-line amortization method. The Company capitalizes IPR&D projects acquired as part of a business combination as intangible assets with indefinite lives. On completion of each project, IPR&D assets are reclassified to developed technology and amortized over their estimated useful lives. If any of the IPR&D projects are abandoned, the Company would impair the related IPR&D asset. Intangible assets with finite lives are tested for impairment in accordance with our policy for long-lived assets.

Indefinite-lived intangible assets are tested for impairment annually or more frequently when indicators of impairment exist. The Company first assesses qualitative factors to determine if it is more likely than not that an indefinite-lived intangible asset is impaired and whether it is necessary to perform a quantitative impairment test. The qualitative assessment considers various factors, including reductions in demand, the abandonment of IPR&D projects or significant economic slowdowns in the semiconductor industry and macroeconomic environment. If adverse qualitative trends are identified that could negatively impact the fair value of the asset, then quantitative impairment tests are performed to compare the carrying value of the asset to its undiscounted expected future cash flows. If this test indicates that there is impairment, the impaired asset is written down to fair value, which is typically calculated using: (i) quoted market prices or (ii) discounted expected future cash flows utilizing an appropriate discount rate. Impairment is based on the excess of the carrying amount over the fair value of those assets.

accompanying balance sheets. The Company monitors the investments and if facts and circumstances indicate an investment may be impaired, then it conducts an impairment test of its investment. To determine if the investment is recoverable, it reviews the privately-held company's revenue and earnings trends relative to pre-defined milestones and overall business prospects, the general market conditions in its industry and other factors related to its ability to remain in business, such as liquidity and receipt of additional funding.

Long-lived assets include equipment, furniture and fixtures, ROU assets, and finite-lived intangible assets. Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be fully recoverable. If the sum of the expected future cash flows (undiscounted and without interest charges) from the long-lived assets is less than the carrying amount of such assets, an impairment loss would be recognized, and the assets would be written down to their estimated fair values. The Company reviews for possible impairment on a regular basis.

Also, in connection with the discontinuation of the 1550nm silicon photonics development activities, the Company recorded impairment charges and a net loss on disposal of assets of $2.4 million during the year ended December 31, 2018. There was also a $0.9 million impairment charge on fixed assets not related to the 1550nm silicon photonics development activities recorded during the year ended December 31, 2018.

The Company recognizes revenue when (or as) it satisfies performance obligations by transferring promised products or services to its customers in an amount that reflects the consideration the Company expects to receive. The Company applies the following five steps: (1) identify the contract with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when a performance obligation is satisfied.

The Company considers customer purchase orders, which in some cases are governed by master sales agreements, to be the contracts with a customer. For each contract, the Company considers the promise to transfer tangible products, extended warranty and post-contract customer support, each of which are distinct, to be the identified performance obligations. In determining the transaction price, the Company evaluates whether the price is subject to rebates and adjustments to determine the net consideration to which the Company expects to receive. As the Company’s standard payment terms are less than one year, the contracts have no significant financing component. The Company allocates the transaction price to each distinct performance obligation based on its relative standalone selling price. Revenue from tangible products is recognized when control of the product is transferred to the customer (i.e., when the Company’s performance obligation is satisfied), which typically occurs at shipment. The revenues from fixed-price support or maintenance contracts, including extended warranty contracts and post-contract customer support agreements, are recognized ratably over the contract period and the costs associated with these contracts are recognized as incurred. The Company's standard arrangements with its customers do not allow for rights of return.

A portion of the Company's sales are made to distributors under agreements which contain price protection provisions. Revenue from sales to distributors is recognized upon shipment and transfer of control, net of estimated distribution price adjustments (“DPAs”). The Company calculates the estimated DPAs based on specific earned DPA claims and estimated unearned DPA claims based on an analysis of historical DPA claims, at the distributor level, over a period of time considered adequate to account for current pricing and business trends. The earned DPA claims are recorded as a reduction of revenue and a reduction of gross accounts receivable. The Company records the estimated unearned DPAs as a reduction of revenue and an increase in the allowance for unearned DPAs.

In addition, the Company records revenue reserves for rebates as a reduction of revenue and a reduction of gross accounts receivable or as an increase in other current payables. The reserves are recorded in the same period that the related revenue is recorded, and are based on the amounts stated in the contracts. The Company reverses reserves for unclaimed rebates as specific rebate programs contractually end and when it believes unclaimed rebates are no longer subject to payment and will not be paid. As a result, the reversal of unclaimed rebates may have a positive impact on our net revenue and net income in subsequent periods.

The Company typically offers a limited warranty for its products for periods up to three years. The Company accrues for estimated returns of defective products at the time revenue is recognized based on historical activity. The determination of these accruals requires the Company to make estimates of the frequency and extent of warranty activity and estimated future costs to either replace or repair the products under warranty. If the actual warranty activity and/or repair and replacement costs differ significantly from these estimates, adjustments to record additional cost of revenues may be required in future periods. Changes in the Company's liability for product warranty were as follows:

The Company accounts for share-based compensation expense based on the estimated fair value of the equity awards as of the grant dates. The fair value of restricted stock units ("RSUs"), is based on the closing market price of our ordinary shares on the date of grant. The Company estimates the fair value of share options and the Employee Share Purchase Plan ("ESPP") using the Black-Scholes option valuation model, which requires the input of subjective assumptions including the expected share price volatility and the calculation of expected term, as well as the fair value of the underlying ordinary share on the date of grant, among other inputs.

During the year ended December 31, 2018, the Company granted 36,000 performance share units ("PSUs"). The PSUs will vest and be earned based on the Company’s achievement of relative total shareholder return and average non-GAAP net operating margin over a three-year performance period commencing on January 1, 2018 and ending on December 31, 2020, subject to the continued service to the Company through the end of the performance period. The number of shares that will actually vest range from zero to 175% of the target. The share-based compensation expenses related to these PSUs were $2.1 million and $0.9 million for the year ended December 31, 2019 and 2018, respectively.

Accumulated other comprehensive income (loss), net of tax on the consolidated balance sheets at December 31, 2019 and 2018, represents the accumulated unrealized gains (losses) on available-for-sale securities, and the accumulated unrealized gains (losses) related to derivative instruments accounted for as cash flow hedges. The amount of income tax expense allocated to unrealized gains (losses) on available-for-sale securities and derivative instruments was immaterial at December 31, 2019 and 2018.

The Company uses 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. The Company derives all revenues in U.S. dollars. Expenses are remeasured at the exchange rate in effect on the day the transaction occurred, except for those expenses related to non-monetary assets and liabilities, which are remeasured at historical exchange rates. Gains or losses from foreign currency transactions are included in the Consolidated Statements of Operations as part of "Interest and other, net."

Basic net income (loss) per share is computed by dividing the net income (loss) by the weighted-average number of ordinary shares outstanding during the period. Diluted net income (loss) per share is computed by dividing the net income (loss) by the weighted-average number of ordinary shares outstanding during the period increased to include the number of additional shares that would have been outstanding if the potentially dilutive shares had been issued. Potentially dilutive shares include unvested RSUs, PSUs, outstanding stock options, and shares to be purchased by employees under the Company’s employee stock purchase plan. The dilutive effect of potentially dilutive shares is reflected in diluted net income (loss) per share by application of the treasury stock method.



	Year Ended December 31,
	2019		2018		2017
	(In thousands, except per share data)
Net income (loss)	$	205,095	$	134,258	$	(19,425	)
Basic and diluted shares:
Weighted average ordinary shares outstanding	54,946		52,863		50,310
Effect of dilutive shares	1,716		1,783		—
Shares used to compute diluted net income (loss) per share	56,662		54,646		50,310
Net income (loss) per share—basic	$	3.73	$	2.54	$	(0.39	)
Net income (loss) per share—diluted	$	3.62	$	2.46	$	(0.39	)

The Company excluded 0.1 million potentially dilutive share options and RSUs from the computation of diluted net income per share for the year ended December 31, 2019, 0.2 million outstanding share options and RSUs from the computation of diluted net income per share for the year ended December 31, 2018, and 4.5 million potentially dilutive shares options and RSUs from the computation of diluted net loss per share for the year ended December 31, 2017, respectively, because including them would have had an anti-dilutive effect.

To prepare the Company's consolidated financial statements, the Company estimates its income taxes in each of the jurisdictions in which it operates. This process involves estimating the Company's actual tax exposure together with assessing temporary differences resulting from the differing treatment of certain items for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are calculated using tax rates expected to be in effect during the period these temporary differences would reverse, and are included within the Company's consolidated balance sheet.

The Company must also make judgments regarding the realizability of deferred tax assets. The carrying value of the Company's net deferred tax assets is based on its belief that it is more likely than not that the Company will generate sufficient future taxable income in certain jurisdictions to realize these deferred tax assets. A valuation allowance has been 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 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 allowances it has established may be increased or decreased, resulting in a respective increase or decrease in income tax expense. The Company's effective tax rate is highly dependent upon the geographic distribution of its worldwide earnings or losses, the tax regulations and tax holidays in each geographic region, the availability of tax credits and carryforwards, and the effectiveness of its tax planning strategies.

The Company uses a two-step approach to recognizing and measuring uncertain tax positions accounted for in accordance with the guidance on judgments regarding the realizability of deferred taxes. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount which is more than 50% likely of being realized upon ultimate settlement. The Company considers many factors when evaluating and estimating its tax positions and tax benefits, which may require periodic adjustments and which may not accurately anticipate actual outcomes. The Company recognizes potential accrued interest and penalties related to unrecognized tax benefits within the consolidated statements of income as income tax expense.

The standard became effective for the Company on January 1, 2019. The Company elected the available practical expedients and implemented internal controls to enable the preparation of financial information on adoption. The adoption of the standard had a material impact on the Company's consolidated balance sheet due to the recognition of the ROU assets and lease liabilities related to the Company's operating leases. In addition, a material portion of the Company's leases are denominated in currencies other than the U.S. Dollar, mainly in New Israeli Shekels ("NIS"). As a result, the associated lease liabilities are remeasured using the current exchange rate, which may result in non-operating foreign exchange gains and losses. See Note 15, "Leases" for details about the impact from adopting the new lease standard and other required disclosures.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments, which modifies the measurement of expected credit losses on certain financial instruments. In addition, for available-for-sale debt securities, the standard eliminates the concept of other-than-temporary impairment and requires the recognition of an allowance for credit losses rather than reductions in the amortized cost of the securities. This standard became effective for the Company beginning January 1, 2020. The Company does not expect this ASU to have a material impact on its consolidated financial statements and related disclosures.