Cavium (CAVM) Inactive 10-K28 Feb 172016 FY Annual reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
Document and Entity Information - USD ($) $ in Billions	Dec. 31, 2016	Feb. 22, 2017	Jun. 30, 2016
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Trading Symbol	CAVM
Entity Registrant Name	CAVIUM, INC.
Entity Central Index Key	1,175,609
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		67,831,021
Entity Public Float			$ 2.2

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 221,439	$ 134,646
Accounts receivable, net of allowances of $4,130 and $1,468, respectively	125,728	68,742
Inventories	119,692	47,009
Prepaid expenses and other current assets	22,259	10,231
Total current assets	489,118	260,628
Property and equipment, net	150,862	64,677
Intangible assets, net	764,885	35,492
Goodwill	241,067	71,478
Other assets	4,599	1,718
Total assets	1,650,531	433,993
Current liabilities:
Accounts payable	65,456	27,489
Accrued expenses and other current liabilities	64,967	9,443
Deferred revenue	8,412	6,316
Current portion of long-term debt	3,865
Capital lease and technology license obligations	25,535	20,608
Total current liabilities	168,235	63,856
Long-term debt	675,414
Capital lease and technology license obligations, net of current portion	27,878	9,858
Deferred tax liability	18,774	3,417
Other non-current liabilities	18,386	2,962
Total liabilities	908,687	80,093
Commitments and contingencies (Note 13)
Stockholders' equity
Preferred stock, par value $0.001: 10,000,000 shares authorized; no shares issued and outstanding
Common stock, par value $0.001: 200,000,000 shares authorized; 67,181,634 and 56,259,252 shares issued and outstanding, respectively	67	56
Additional paid-in capital	1,079,043	543,256
Accumulated deficit	(336,621)	(189,412)
Accumulated other comprehensive loss	(645)
Total stockholders' equity	741,844	353,900
Total liabilities and stockholders' equity	$ 1,650,531	$ 433,993

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Allowances for accounts receivable	$ 4,130	$ 1,468
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	67,181,634	56,259,252
Common stock, shares outstanding	67,181,634	56,259,252

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Net revenue	$ 603,314	$ 412,744	$ 372,978
Cost of revenue	318,000	143,767	138,359
Gross profit	285,314	268,977	234,619
Operating expenses:
Research and development	257,816	203,778	171,690
Sales, general and administrative	161,051	78,926	70,404
Total operating expenses	418,867	282,704	242,094
Loss from operations	(133,553)	(13,727)	(7,475)
Other income (expense), net:
Interest expense	(12,734)	(1,241)	(1,472)
Change in estimated fair value of notes payable and other			(14,888)
Other, net	75	(410)	(347)
Total other expense, net	(12,659)	(1,651)	(16,707)
Loss before income taxes	(146,212)	(15,378)	(24,182)
Provision for income taxes (Note 9)	997	1,682	1,633
Net loss	(147,209)	(17,060)	(25,815)
Net loss attributable to non-controlling interest			(10,520)
Net loss attributable to the Company	$ (147,209)	$ (17,060)	$ (15,295)
Earnings per share attributable to the Company:
Net loss per common share, basic	$ (2.42)	$ (0.31)	$ (0.29)
Shares used in computing basic net loss per common share	60,883	55,589	53,451
Net loss per common share, diluted	$ (2.42)	$ (0.31)	$ (0.29)
Shares used in computing diluted net loss per common share	60,883	55,589	53,451

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Non-controlling Interest	Accumulated Other Comprehensive Loss
Beginning Balance at Dec. 31, 2013	$ 274,831	$ 53	$ 443,588	$ (157,057)	$ (11,753)
Beginning Balance, Shares at Dec. 31, 2013		52,221,251
Common stock issued in connection with exercises of stock options	15,211	$ 1	15,210
Common stock issued in connection with exercises of stock options, Shares		1,082,914
Common stock issued in connection with vesting of restricted stock units, Shares		1,154,123
Stock-based compensation	52,456		52,456
Settlement of non-controlling interest			(22,273)		22,273
Net loss	(25,815)			(15,295)	$ (10,520)
Ending Balance at Dec. 31, 2014	316,683	$ 54	488,981	(172,352)
Ending Balance, Shares at Dec. 31, 2014		54,458,288
Common stock issued in connection with exercises of stock options	9,608	$ 1	9,607
Common stock issued in connection with exercises of stock options, Shares		685,439
Common stock issued in connection with vesting of restricted stock units	1	$ 1
Common stock issued in connection with vesting of restricted stock units, Shares		1,115,525
Stock-based compensation	48,298		48,298
Payments to common shareholders of Xpliant	(3,630)		(3,630)
Net loss	(17,060)			(17,060)
Ending Balance at Dec. 31, 2015	353,900	$ 56	543,256	(189,412)
Ending Balance, Shares at Dec. 31, 2015		56,259,252
Common stock issued in connection with exercises of stock options	11,425	$ 1	11,424
Common stock issued in connection with exercises of stock options, Shares		1,010,670
Common stock issued in connection with vesting of restricted stock units	2	$ 2
Common stock issued in connection with vesting of restricted stock units, Shares		1,547,694
Taxes withheld on net settled vesting of restricted stock units	(1,930)		(1,930)
Issuance of common stock in connection with the acquisition of QLogic	431,165	$ 8	431,157
Issuance of common stock in connection with the acquisition of QLogic, Shares		8,364,018
Stock-based compensation	85,703		85,703
Fair value of the replacement equity awards attributable to pre-acquisition service	9,433		9,433
Other comprehensive loss	(645)					$ (645)
Net loss	(147,209)			(147,209)
Ending Balance at Dec. 31, 2016	$ 741,844	$ 67	$ 1,079,043	$ (336,621)		$ (645)
Ending Balance, Shares at Dec. 31, 2016		67,181,634

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net loss attributable to the Company	$ (147,209)	$ (17,060)	$ (15,295)
Foreign currency translation adjustments	(645)
Comprehensive loss	$ (147,854)	$ (17,060)	$ (15,295)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net loss	$ (147,209)	$ (17,060)	$ (25,815)
Adjustments to reconcile net loss to net cash provided by operating activities:
Stock-based compensation expense	85,330	48,297	52,459
Depreciation and amortization	99,236	42,442	34,087
Deferred income taxes	(2,138)	663	385
Change in estimated fair value of notes payable and other			14,888
Amortization of deferred debt financing costs	1,631
(Gain) loss on disposal of property and equipment	5,188	129	(115)
Gain on disposition of certain consumer product assets		(400)	(1,000)
Changes in assets and liabilities, net of acquired and assumed from acquisitions:
Accounts receivable, net	8,590	(20,543)	(4,563)
Inventories	(9,010)	4,914	(6,157)
Prepaid expenses and other current assets	591	(2,101)	(1,589)
Other assets	(1,709)	(9)	(433)
Accounts payable	(7,524)	(220)	2,056
Deferred revenue	1,492	31	(2,384)
Accrued expenses and other current and non-current liabilities	31,030	1,706	(1,205)
Net cash provided by operating activities	65,498	57,849	60,614
Cash flows from investing activities:
Purchases of property and equipment	(49,660)	(35,826)	(17,994)
Purchases of intangible assets	(51,440)	(6,440)	(6,919)
Cash payment for acquisitions, net of cash and cash equivalents acquired	(573,830)	(3,630)
Proceeds received from sale of held for sale assets	32,420
Proceeds received from disposition of certain consumer product assets		400	1,000
Sale (purchase) of available-for-sale securities and short-term investment	375	1,000	(1,000)
Net cash used in investing activities	(642,135)	(44,496)	(24,913)
Cash flows from financing activities:
Proceeds from issuance of common stock upon exercise of options	11,427	9,609	15,211
Payment of taxes withheld on net settled vesting of restricted stock units	(1,930)
Principal payment of capital lease and technology license obligations	(23,716)	(20,034)	(18,557)
Proceeds from issuance of debt	750,000
Debt financing costs	(20,601)
Proceeds from issuance of notes			1,400
Principal payment of debt and notes payable	(51,750)		(29,800)
Net cash provided by (used in) financing activities	663,430	(10,425)	(31,746)
Net increase in cash and cash equivalents	86,793	2,928	3,955
Cash and cash equivalents, beginning of period	134,646	131,718	127,763
Cash and cash equivalents, end of period	221,439	134,646	131,718
Supplemental disclosures of cash flow information:
Cash paid for interest	10,105	1,273	1,812
Cash paid for taxes	2,207	958	1,133
Supplemental disclosures of cash flows from financing activities:
Issuance of common stock in connection with the QLogic acquisition	431,165
Unpaid capital expenditures included in accounts payable and other accrued expenses and other current liabilities
Supplemental disclosures of cash flows from investing and financing activities:
Property and equipment and intangible assets acquired	5,978	2,335	1,188
Unpaid capital expenditures included in capital lease and technology license obligations
Supplemental disclosures of cash flows from investing and financing activities:
Property and equipment and intangible assets acquired	$ 47,237	$ 4,157	$ 30,443

Organization and Significant Ac

Organization and Significant Accounting Policies	12 Months Ended
Organization and Significant Accounting Policies	Dec. 31, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization and Significant Accounting Policies	1. Organization and Significant Accounting Policies Organization Cavium, Inc., (the “Company”), was incorporated in the state of California on November 21, 2000 and was reincorporated in the state of Delaware effective February 6, 2007. The Company designs, develops and markets semiconductor processors for intelligent and secure networks. On August 16, 2016, the Company completed the acquisition of QLogic Corporation (“QLogic”). QLogic designs and supplies high performance server and storage networking connectivity products that provide, enhance and manage computer data communication used in enterprise, managed service provider and cloud service provider datacenters. See Note 2 of Notes to Consolidated Financial Statements for further discussion regarding the Company’s acquisition of QLogic. Basis of Consolidation The consolidated financial statements include the accounts of Cavium, Inc. and its wholly owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. Prior to the closing of the acquisition of Xpliant, Inc. (“Xpliant”) in April 2015 as discussed in Note 2 of Notes to Consolidated Financial Statements, the Company accounted for Xpliant as a variable interest entity, or VIE. Under the accounting principles generally accepted in the United States of America, or US GAAP, a VIE is required to be consolidated by its primary beneficiary. The primary beneficiary is the party that absorbs a majority of the VIE’s anticipated losses and/or a majority of the expected returns. All intercompany transactions and balances have been eliminated in consolidation. Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in its consolidated financial statements and accompanying notes. Management bases its estimates on historical experience and on various other assumptions it believes to be reasonable under the circumstances, the results of which form the basis of making judgments about the carrying values of assets and liabilities. Actual results could differ from those estimates. Revenue Recognition The Company primarily derives its revenue from sales of semiconductor products to original contract manufacturers, or OEM, or through OEM’s contract manufacturers or distributors. To a lesser extent, the Company also derive revenue from licensing software and related maintenance and support and from professional service arrangements. The Company recognizes revenue when (i) persuasive evidence of a binding arrangement exists; (ii) delivery has occurred or service has been rendered; (iii) the price is deemed fixed or determinable and free of contingencies and significant uncertainties; and (iv) collectibility is reasonably assured. The Company records a reduction in revenue for provision for estimated sales returns in the same period the related revenues are recorded. These estimates are based on historical patterns of return, analysis of credit memo data and other known factors at the time. The Company also records reductions of revenue for pricing adjustments, such as competitive pricing programs and rebates, in the same period that the related revenue is recorded. The Company accrues the full potential rebates at the time of sale and does not apply a breakage factor. The reversal of the accrual of unclaimed rebate will be made if the specific rebate programs contractually end and when the Company believes that the unclaimed rebates are no longer subject to payment. Revenue is recognized upon shipment to distributors with limited rights of returns and price protection if the Company concludes that it can reasonably estimate the credit for returns and price adjustments issuable. The Company records an estimated allowance, at the time of shipment, based on the Company’s historical patterns of returns and pricing credit of sales recognized upon shipment. Credits issued to distributors or other customers have historically not been material. The inventory at these distributors at the end of the period may fluctuate from time to time mainly due to the OEM production ramps and/or new customer demands. Software arrangements typically include time-based licenses for 12 months with related support. The Company does not sell support separately, therefore, revenue from software arrangements is recognized ratably over the support period. The software arrangement may also include professional services, and these services may be purchased separately. Professional services engagements are billed on either a fixed-fee or time-and-materials basis. For fixed-fee arrangements, professional services revenue is recognized under the proportional performance method, with the associated costs included in cost of revenue. The Company estimates the proportional performance of the arrangements based on an analysis of progress toward completion. The Company periodically evaluates the actual status of each project to ensure that the estimates to complete each contract remain accurate, and a loss is recognized when the total estimated project cost exceeds project revenue. If the amount billed exceeds the amount of revenue recognized, the excess amount is recorded as deferred revenue. Revenue recognized in any period is dependent on progress toward completion of projects in progress. To the extent we are unable to estimate the proportional performance, revenue is recognized on a completed performance basis. Revenue for time-and-materials engagements is recognized as the effort is incurred. For sales that include multiple deliverables, the Company allocates revenue based on the relative selling price of the individual components. When more than one element, such as hardware and services, are contained in a single arrangement, the Company allocates revenue between the elements based on each element’s relative selling price, provided that each element meets the criteria for treatment as a separate unit of accounting. Accounting for Stock-Based Compensation The Company applies the fair value recognition provisions of stock-based compensation. The Company recognizes the fair value of the awards on a straight-line basis over its vesting periods. The Company estimates the grant date fair value of stock options using the Black-Scholes option valuation model. The Black-Scholes option-pricing model used to determine the fair value of stock options requires various subjective assumptions, including expected volatility, expected term and the risk-free interest rates. The stock price volatility assumption is estimated using the Company’s historical stock price volatility. For options granted beginning 2016, the Company used historical exercise patterns to estimate the expected life. Prior to 2016, the Company used the simplified method as permitted by the guidance on stock-based compensation to estimate the expected life since the Company had no sufficient history of weighted average period from the date of grant to exercise, cancellation, or expiration. The risk free interest rate is based on the implied yield currently available on United States. Treasury securities with an equivalent remaining term. For all restricted stock unit, or RSU, grants other than RSU grants with a market condition, the fair value of the RSU grant is based on the market price of the Company’s common stock on the date of grant. For performance-based RSU grants, the Company evaluates the probability of achieving the milestones for each of the outstanding performance-based RSU grants at each reporting period and updates the related stock-based compensation expense. The fair value of market-based RSUs is determined using the Monte Carlo simulation method which takes into account multiple input variables that determine the probability of satisfying the market conditions stipulated in the award. This method requires the input of assumptions, including the expected volatility of the Company’s common stock, and a risk-free interest rate, similar to assumptions used in determining the fair value of the stock option grants discussed above. The grant date fair value of RSUs, less estimated forfeitures, is recorded based upon the vesting method over the service period. Income Taxes The Company accounts for income taxes under the asset and liability method. Under this method, deferred tax assets, including those related to tax loss carryforwards and credits, and liabilities are determined based on the differences between the financial statement and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. A valuation allowance is recorded to reduce deferred tax assets when management cannot conclude that it is more-likely-than-not that the net deferred tax asset will be recovered. The valuation allowance is determined by assessing both positive and negative evidence to determine whether it is more-likely-than-not that deferred tax assets are recoverable; such assessment is required on a jurisdiction-by-jurisdiction basis. The Company recognizes uncertain tax positions when it meets a more-likely-than-not threshold. The Company recognizes potential accrued interest and penalties related to unrecognized tax benefits as income tax expense. Business Combinations The Company accounts for business combinations using the purchase 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 is separable or divisible from the acquired entity and capable of being sold, transferred, licensed, returned or exchanged. In accordance with the guidance provided under business combinations, the Company allocates the purchase price of business combinations to the tangible assets, liabilities and intangible assets acquired, including in-process research and development, or IPR&D, based on their estimated fair values. The excess purchase price over those fair values is recorded as goodwill. The Company’s valuation assumption of acquired assets and assumed liabilities requires significant estimates, especially with respect to intangible assets. The Company estimates the fair value based upon assumptions the Company believes to be reasonable, but which are inherently uncertain and unpredictable and, as a result, actual results may differ from estimates. Estimates associated with the accounting for acquisitions may change as additional information becomes available regarding the assets acquired and liabilities assumed. Acquisition-related costs, including advisory, legal, accounting, valuation and other costs, are expensed in the periods in which the costs are incurred. The results of operations of acquired businesses are included in the consolidated financial statements from the acquisition date. Goodwill and indefinite-lived intangible assets Goodwill is measured as the excess of the cost of an acquisition over the sum of the amounts assigned to tangible and identifiable intangible assets and liabilities assumed. The Company evaluates goodwill for impairment at its single reporting unit level at least on an annual basis in the fourth quarter of the calendar year or whenever events and changes in circumstances suggest that the carrying amount may not be recoverable from its estimated future cash flow. The Company performs a qualitative assessment to determine if any events have occurred or circumstances exist that would indicate that it is more-likely-than-not that a goodwill impairment exists. If any indicators exist based on the qualitative analysis that it is more-likely-than-not that a goodwill impairment exists, the quantitative test is required. Otherwise, no further testing is required. IPR&D acquired in an asset acquisition is capitalized only if it has an alternative future use. IPR&D recorded as an asset acquired through business combinations is not amortized but instead is tested annually for impairment, or more frequently when events or changes in circumstances indicate that the asset might be impaired. The Company initially assesses qualitative factors to determine whether it is more likely than not that the fair value of IPR&D is less than its carrying amount, and if so, the Company conducts a quantitative impairment test. The quantitative impairment test consists of a comparison of the fair value of IPR&D to its carrying amount. If the carrying value exceeds its fair value, an impairment loss is recognized in an amount equal to the difference. When an IPR&D project is complete, the related intangible asset becomes subject to amortization and impairment analysis as a long-lived asset. Long-lived assets The Company reviews long-lived assets, including property and equipment and intangible assets, for impairment whenever events or changes in business circumstances indicate that the carrying amount of the assets (or asset group) may not be fully recoverable. Whenever events or changes in circumstances suggest that the carrying amount of long-lived assets may not be recoverable, the Company estimates the future cash flows expected to be generated by the assets (or asset group) from its use or eventual disposition. If the sum of the expected future cash flows is less than the carrying amount of those assets, the Company recognizes an impairment loss based on the excess of the carrying amount over the fair value of the assets. Significant management judgment is required in the grouping of long-lived assets and forecasts of future operating results that are used in the discounted cash flow method of valuation. Inventories Inventories consist of work-in-process and finished goods. Inventories not related to an acquisition are stated at the lower of cost (determined using the first-in, first-out method), or market value (estimated net realizable value). Inventories from acquisitions are stated at fair value at the date of acquisition. The Company writes down excess and obsolete inventory based on its age and forecasted demand, generally over a 12 month period, which includes estimates taking into consideration the Company’s outlook on uncertain events such as market and economic conditions, technology changes, new product introductions and changes in strategic direction. Actual demand may differ from forecasted demand and such differences may have a material effect on recorded inventory values. Inventory write-downs are not reversed until the related inventories have been sold or scrapped. Inventories acquired through business combinations are recorded at their acquisition date fair value, which is the estimated selling price less the costs of disposal and a normal profit allowance. Property and Equipment Property and equipment are stated at cost and depreciated over their estimated useful lives using the straight-line method. Leasehold improvements are amortized over the shorter of estimated useful lives or unexpired lease term. Additions and improvements that increase the value or extend the life of an asset are capitalized. Upon retirement or sale, the cost of assets disposed of and the related accumulated depreciation are removed from the accounts and any resulting gain or loss is credited or charged to income. Ordinary repairs and maintenance costs are expensed as incurred. Estimated Software, design tools, computer and other equipment 1 to 5 years Test equipment and mask costs 1 to 5 years Furniture and office equipment 1 to 5 years The Company capitalizes the cost of fabrication masks that are reasonably expected to be used during production manufacturing. Such amounts are included within property and equipment and are depreciated over a period of 12 to 24 months and recorded as a component of cost of revenue. If the Company does not reasonably expect to use the fabrication mask during production manufacturing, the related mask costs are expensed to research and development in the period in which the costs are incurred. The Company leases certain design tools under financing arrangements which are included in property and equipment. The Company also capitalizes acquired internally used software in property and equipment. Subsequent additions, modifications or upgrades to internally used software are capitalized to the extent it provides additional usage or functionality. Fair Value Measurements Fair value is the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The fair value hierarchy is based on three levels of inputs that may be used to measure fair value. The first two levels of inputs are considered observable and the last unobservable. A description of the three levels of inputs is as follows: • Level 1 – Quoted prices in active markets for identical assets or liabilities. • Level 2 – Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. • Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Cash and Cash Equivalents The Company considers all highly liquid investments with an original or remaining maturity of 90 days or less at the date of purchase to be cash equivalents. Cash equivalents consist of an investment in a money market fund. Allowance for Doubtful Accounts The Company reviews its allowance for doubtful accounts by assessing individual accounts receivable over a specific age and amount. The Company’s allowance for doubtful accounts were not significant as of December 31, 2016 and 2015. Concentration of Risk The Company’s products are currently manufactured, assembled and tested by third-party contractors in Asia. There are no long-term agreements with any of these contractors. A significant disruption in the operations of one or more of these contractors would impact the production of the Company’s products for a substantial period of time, which could have a material adverse effect on the Company’s business, financial condition and results of operations. Financial instruments that potentially subject the Company to a concentration of credit risk consist of cash, cash equivalents and accounts receivable. The Company deposits cash with credit worthy financial institutions. The Company has not experienced any losses on its deposits of cash. Management believes that the financial institutions the Company utilizes are reputable and, accordingly, minimal credit risk exists. The Company’s cash equivalents are invested in a money market fund. The Company follows an established investment policy and set of guidelines to monitor, manage and limit the Company’s exposure to interest rate and credit risk. The policy sets forth credit quality standards and limits the Company’s exposure to any one issuer, as well as the maximum exposure to various asset classes. A majority of the Company’s accounts receivable are derived from customers headquartered in the United States. The Company performs ongoing credit evaluations of its customers’ financial condition and, generally, requires no collateral from its customers. The Company provides an allowance for doubtful accounts receivable based upon the expected collectability of accounts receivable. Summarized below are individual customers whose accounts receivable balances were 10% or higher of the consolidated gross receivable: As of December 31, 2016 2015 Percentage of gross accounts receivable Customer A 15% 16% Customer B * 20% Customer C 12% * Customer D 11% * Customer E 11% * * Represents less than 10% of the gross accounts receivable for the respective period end. Summarized below are individual OEM customers whose revenue balances were 10% or higher of the consolidated net revenue: Year Ended December 31, 2016 2015 2014 Percentage of revenue by customer Customer B 12.0% 12.5% 16.6% Customer F 13.1% 18.4% 15.4% Customer G * 12.0% 12.4% * Represents less than 10% of the net revenue for the respective year ended Deferred revenue The Company records deferred revenue for customer billings and advance payments received from customers before the performance obligations have been completed and/or services have been performed for products and/or service related agreements. The Company records deferred revenue, net of deferred costs on shipments to sell-through distributors. Warranty Accrual The Company’s products are generally subject to a one-year warranty period though certain products carry a warranty for up to three years. The Company records a liability for product warranty obligations in the period the related revenue is recorded based on historical warranty experience. Research and Development Research and development costs are expensed as incurred and primarily include personnel costs, prototype expenses, which include the cost of fabrication mask costs not reasonably expected to be used in production manufacturing, and allocated facilities costs as well as depreciation of equipment used in research and development. Deferred Research and Development Cost Occasionally, the Company receives funding from third party companies for certain collaboration research and development. The Company records the funding received as deferred research and development costs within accrued expense and other liabilities. The liability for deferred research and development cost will be reduced over time to offset the research and development expenses incurred by the Company related to such funding. Advertising The Company expenses advertising costs as incurred. Advertising expenses were $2.8 million, $2.5 million and $1.8 million for the years ended December 31, 2016, 2015 and 2014, respectively. Operating Leases The Company recognizes rent expense on a straight-line basis over the term of the lease. The difference between rent expense and rent paid is recorded as deferred rent in accrued expenses and other current and non-current liabilities on the consolidated balance sheets. Other Comprehensive Income (Loss) Comprehensive income (loss) includes all changes in equity other than transactions with stockholders. The Company’s accumulated other comprehensive loss consists of foreign currency translation adjustments. Foreign Currency Remeasurement Certain of the Company’s foreign subsidiaries utilize a functional currency other than United States dollars. Assets and liabilities of these subsidiaries are translated to United States dollars at exchange rates in effect at the balance sheet date, and income and expenses are translated at average exchange rates during the period. The resulting translation adjustments are recorded as a component of accumulated other comprehensive income (loss). Gains and losses resulting from transactions denominated in currencies other than the functional currency are included in other, net in the consolidated statements of operations were not material for the years ended December 31, 2016, 2015 and 2014. Recently Adopted Accounting Standards In January 2017, the FASB issued an update to the guidance on business combinations to clarify the definition of a business. This new guidance provides a more robust framework to use in determining when a set of assets and activities is a business. This new standard is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The new standard should be applied prospectively on or after the effective date. Early adoption of this new standard is allowed for transactions for which the acquisition date occurs before the issuance date or effective date of the amendments, only when the transaction has not been reported in financial statements that have been issued or made available for issuance. The Company early adopted this new guidance effective on its December 31, 2016 financial reporting. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements and related disclosures. In September 2015, the FASB issued an update to the business combinations standards simplifying the accounting for measurement period adjustments. The amendments in this update require that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The amendments in this update require that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. The amendments in this update require an entity to present separately on the face of the income statement or disclose in the notes the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. The update is effective for interim and annual periods beginning after December 15, 2015. The amendments in this update should be applied prospectively to adjustments to provisional amounts that occur after the effective date of this update with earlier application permitted for financial statements that have not been issued. The Company adopted this new guidance effective during its fourth quarter ended December 31, 2016. See Note 2 of Notes to Consolidated Financial Statements for discussion of measurement period adjustments relating to the QLogic acquisition. In April 2015, the FASB issued an update simplifying the presentation of debt issuance cost. This new guidance requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The new standard is effective for fiscal years beginning after December 15, 2015 and interim periods within those fiscal years. Early adoption is permitted for financial statements that have not been previously issued. The Company adopted this guidance during fiscal 2016 and has presented debt issuance costs as a direct deduction from the related debt liability. Recently Issued Accounting Standards Not Yet Effective In January 2017, the FASB issued an update to the 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 update is effective for goodwill impairment test in fiscal years beginning after December 15, 2019, though early adoption is permitted. The Company is currently assessing the impact of this new guidance. In November 2016, the FASB issued an update to the guidance on statement of cash flows - restricted cash presentation. This new guidance which requires entities to show the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flow. This standard is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period, but any adjustments must be reflected as of the beginning of the fiscal year that includes that interim period. The new standard must be adopted retrospectively. Upon adoption, the Company will present its statement of cash flows in accordance with this updated guidance. In October 2016, the FASB, issued an update to guidance on income taxes. This new guidance requires an entity to recognize the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. This new guidance is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted as of the beginning of an annual reporting period for which financial statements have not been issued or made available for issuance. The Company is currently evaluating the adoption date and the impact, if any, adoption will have on its financial position and results of operations. In August 2016, the FASB, issued a new guidance on cash flow classification of certain cash receipts and cash payments. This new guidance will make eight targeted changes to how cash receipts and cash payments are presented and classified in the statement of cash flows. The eight specific cash flow issues include: (i) debt prepayment or debt extinguishment costs, (ii) settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effecting interest rate of the borrowing, (iii) contingent consideration payments made after a business combination, (iv) proceeds from settlement of insurance claims, (v) proceeds from the settlement of corporate-owned life insurance policies, (vi) distributions received from equity method investees, (vii) beneficial interests in securitization transactions, and (viii) separately identifiable cash flows and application of the predominance principle. This new guidance is effective for fiscal years beginning after December 15, 2017 including interim periods during the annual period and require adoption on a retrospective basis unless it is impracticable to apply, in which case it would be required to apply the amendments prospectively as of the earliest date practicable. Early adoption is permitted. The Company will present its statement of cash flows in accordance with this guidance subsequent to adoption. In June 2016 the FASB issued an updated guidance on measurement of credit losses on financial instruments. This updated guidance introduces a new forward-looking approach, based on expected losses, to estimate credit losses on certain types of financial instruments, including trade receivables. The estimate of expected credit losses will require entities to incorporate considerations of historical information, current information and reasonable and supportable forecasts. This updated guidance also expands the disclosure requirements to enable users of financial statements to understand the entity’s assumptions, models and methods for estimating expected credit losses. This new guidance is effective for fiscal years beginning after December 15, 2020 including interim periods during the annual period. Early adoption is permitted for fiscal years beginning after December 15, 2015 including interim periods during the annual period. The Company is currently evaluating the impact of this updated guidance on its consolidated financial statements and related disclosures. In March 2016, the FASB issued an update to the guidance on stock-based compensation. Under the new guidance, all excess tax benefits and tax deficiencies will be recognized in the income statement as they occur. This will replace the current guidance, which requires tax benefits that exceed compensation cost (windfalls) to be recognized in equity. It will also eliminate the need to maintain a “windfall pool,” and will remove the requirement to delay recognizing a windfall until it reduces current taxes payable. The new guidance will also change the cash flow presentation of excess tax benefits, classifying them as operating inflows, consistent with other cash flows related to income taxes. Today, windfalls are classified as financing activities. Also, most companies with stock-based compensation will show additional dilutive

Business Combinations

Business Combinations	12 Months Ended
Business Combinations	Dec. 31, 2016
Business Combinations [Abstract]
Business Combinations	2. Business Combinations QLogic Corporation On August 16, 2016, pursuant to the terms of an Agreement and Plan of Merger dated June 15, 2016, by and among the Company, Quasar Acquisition Corp. (a wholly owned subsidiary of the Company) and QLogic (the “QLogic merger agreement”), the Company acquired all outstanding shares of common stock of QLogic (the “QLogic shares”) pursuant to an exchange offer for $11.00 per share in cash and 0.098 of a share of the Company’s common stock for each share of QLogic stock (“Transaction Consideration”) followed by a merger. The acquisition was funded with a combination of cash and proceeds from debt financing. See Note 11 of Notes to Consolidated Financial Statements for discussion of the debt financing. The f ollowing table summarizes the total acquisition consideration (in thousands, except shares and per share data): Cash consideration to QLogic common stockholders $ 936,961 Common stock (8,364,018 shares of the Company's common stock at $51.55 per share) 431,165 Cash consideration for vested "in the money" stock options and fractional shares 1,934 Fair value of replacement equity awards attributable to pre-acquisition service 9,433 Total acquisition consideration $ 1,379,493 Pursuant to the QLogic merger agreement, the Company assumed the unvested equity awards originally granted by QLogic and converted them into the Company’s equivalent awards. The portion of the fair value of partially vested awards associated with prior service of QLogic employees represented a component of the total consideration, as presented above. The Company also made cash payments for vested and in the money stock options and for the fractional shares that resulted from conversion as specified in the QLogic merger agreement. The Company allocated the acquisition consideration to tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. The fair value of the acquired tangible and identifiable intangible assets were determined based on inputs that are unobservable and significant to the overall fair value measurement. It is also based on estimates and assumptions made by management at the time of the acquisition. As such, this was classified as Level 3 fair value hierarchy measurements and disclosures. The purchase price allocation presented below is preliminary, primarily with respect to tax contingency matters. The Company continues to reevaluate the items with any adjustments to its preliminary estimates being recognized as goodwill provided that it is within the measurement period (which will not exceed 12 months from the acquisition date). As additional information becomes available, the Company may further revise its preliminary purchase price allocation during the remainder of the measurement period. Any such revisions or changes to the preliminary purchase price allocation may be material. The Company recorded QLogic’s tangible and intangible assets and liabilities based on their estimated fair values as of the acquisition date and allocated the remaining acquisition consideration to goodwill. The allocation is as follows: Amounts Previously Recognized as of Acquisition Date (Provisional) (1) Measurement Period Adjustments Amounts Recognized as of Acquisition Date (Provisional as Adjusted) (amounts in thousands) Cash and cash equivalents $ 365,065 $ - $ 365,065 Marketable securities 375 375 Accounts receivable 65,576 65,576 Inventories 62,500 800 (2) 63,300 Prepaid expense and other current assets 8,274 8,274 Property and equipment 87,314 (5,424 ) (3) 81,890 Intangible assets 716,700 5,000 (4) 721,700 Other assets 1,559 1,559 Goodwill 247,543 (77,954 ) 169,589 Accounts payable (41,776 ) (41,776 ) Accrued expense and other current liabilities (21,288 ) (596 ) (5) (21,884 ) Deferred revenue (603 ) (603 ) Deferred tax liability (95,766 ) 78,529 (5) (17,237 ) Other non-current liabilities (15,980 ) (355 ) (5) (16,335 ) Total acquisition consideration $ 1,379,493 $ - $ 1,379,493 (1) As reported in the Company’s September 30, 2016 Quarterly Report on Form 10-Q. (2) The Company obtained new information regarding the valuation of inventories as of the acquisition date which led to an increase in fair value of inventories, and a corresponding decrease in goodwill. (3) The Company obtained new information regarding the valuation of property and equipment as of the acquisition date which led to a net decrease in the fair value of property and equipment, and a corresponding increase in goodwill. This measurement adjustment was mainly related to the acquired real property which was classified as held for sale asset as of September 30, 2016. (4) The Company obtained new information regarding the valuation of intangible assets as of the acquisition date which led to a net increase in the fair value of intangible assets, and a corresponding decrease in goodwill. (5) The changes to the deferred tax liability, accrued expenses and other current and non-current liabilities pertains to tax related purchase price allocation adjustments. The Company obtained additional information related to its deferred income taxes which led to a decrease in the net deferred tax liability, and a corresponding decrease in goodwill. See detailed discussion below. The Company does not believe that the measurement period adjustments to inventory, property and equipment, intangibles accrued expense and other current and non-current liabilities had a material impact on its consolidated statement of operations, balance sheet or cash flow previously reported on Form 10-Q as of and for the quarter ended September 30, 2016. During the third quarter of 2016 upon closing of the acquisition, the Company recorded a partial release of its net deferred tax assets valuation allowance primarily due to a net deferred tax liability recorded for purchased intangibles and recognized a $82.9 million tax benefit in the third quarter of 2016. During the fourth quarter of 2016, the Company was able to assess and measure an additional deferred tax asset that existed as of the acquisition date of QLogic. Due to the identification of this additional deferred tax asset, the Company made adjustments during the fourth quarter of 2016 to certain tax balances including the reversal of the partial release of the valuation allowance recorded in the third quarter, resulting in an adjustment to goodwill of $78.5 million. The valuation of identifiable intangible assets and their estimated useful lives are as follows: Preliminary Estimated Asset Fair Value Weighted Average Useful Life (Years) (in thousands, except for useful life) Existing and core technology $ 578,400 6 In process research and development ("IPR&D") 78,900 n/a Customer relationships 51,100 10 Tradename and trademark 13,300 5 $ 721,700 The IPR&D consists of two projects relating to the development of process technologies to manufacture next generation Fibre Channel and Ethernet products. The projects are estimated to be completed in fiscal years 2017 and 2019 for the related Ethernet and Fibre Channel products, respectively. The estimated remaining cost to complete the IPR&D projects were $112.2 million as of the acquisition date. The fair value of existing and core technology and IPR&D was determined by performing a discounted cash flow analysis using the multi period excess earnings approach. This method includes discounting the projected cash flows associated with each technology over its expected life. Projected cash flows attributable to the existing and core technology and IPR&D were discounted to their present value at a rate commensurate with the perceived risk. The IPR&D will be accounted for as an indefinite-lived intangible asset until the underlying projects are completed or abandoned. The IPR&D will not be amortized until the completion of the related products which is determined by when the underlying projects reached technological feasibility. Upon completion, the IPR&D will be amortized over its estimated useful life; useful lives for IPR&D are expected to range between 5 to 6 years. The valuation of customer relationships was based on the distributor method, taking into account the profit margin a market participant distributor would obtain in selling QLogic products. The useful lives of customer relationships are estimated based upon customer turnover data and management estimates. Other identifiable intangible assets consisted of tradename and trademark, valued using a relief from royalty method. The useful lives of tradename and trademark are expected to correlate to the life of the technology or customer relationships. The assumptions used in forecasting cash flows for each of the identified intangible assets included consideration of the following: • Historical performance including sales and profitability. • Business prospects and industry expectations • Estimated economic life of asset • Development of new technologies • Acquisition of new customers and attrition of existing customers • Obsolescence of technology over time Depending on the structure of a particular acquisition, goodwill and identifiable intangible assets may not be deductible for tax purposes. Goodwill recorded in the QLogic acquisition is not expected to be deductible for tax purposes. The factors that contributed to the recognized goodwill with the acquisition of QLogic include the Company’s belief that the acquisition will create a more diverse semiconductor company with expansive offerings which will enable the Company to expand its product offerings and expected synergies from the combined operations of the Company and QLogic. T he Company incurred $16.6 million in acquisition related costs which were recorded in selling, general and administrative expense in the consolidated statements of operations in the year ended December 31, 2016. Unaudited Supplemental Pro Forma Information The unaudited supplemental pro forma financial information presented below is for illustrative purposes only and is not necessarily indicative of the financial operations or results of operations that would have been realized if the acquisition had been completed on the date indicated, does not reflect synergies that might have been achieved, nor is it indicative of future operating results or financial position. The pro forma adjustments are based upon currently available information and certain assumptions the Company believe are reasonable under the circumstances. The following unaudited supplemental pro forma financial information summarizes the results of operations for the periods presented, as if the acquisition was completed on January 1, 2015. The unaudited supplemental pro forma information reports actual operating results, adjusted to include the pro forma effect of certain fair value adjustments for acquired items, such as the amortization of identifiable intangible assets, depreciation of property and equipment and inventories. It also includes pro forma adjustments for stock-based compensation expense related to replacement equity awards, interest expense on debt and the related tax effects of the acquisition. In accordance with the pro forma acquisition date, the Company recorded in the year ended December 31, 2015 supplemental pro forma financial information the cost of goods sold of $23.3 million from the fair value mark-up in acquired inventory and $40.9 million for the acquisition-related transaction costs incurred by the Company and QLogic. The corresponding adjustments to the supplemental pro forma financial information in the year ended December 31, 2016 were made for the aforementioned pro forma adjustments. QLogic constituted approximately 26% of the consolidated net revenue for the year ended December 31, 2016. Post-acquisition income (loss) on a standalone basis is impracticable to determine as, on the acquisition date, the Company implemented a plan developed prior to the completion of the acquisition and began to immediately integrate QLogic into the Company’s existing operations, engineering groups, sales distribution networks and management structure. The supplemental pro forma financial information for the periods presented is as follows: Year Ended December 31, 2016 2015 (in thousands, except per share data) Pro forma net revenue $ 881,498 885,276 Pro forma net loss (131,849 ) (167,626 ) Pro forma net loss per share, basic $ (1.99 ) $ (2.62 ) Pro forma net loss per share, diluted (1.99 ) (2.62 ) Xpliant, Inc. Pursuant to the Agreement and Plan of Merger and Reorganization (the “Xpliant merger agreement”) between the Company and Xpliant, Inc., a final closing occurred on April 29, 2015 as discussed in detail below. Between May 2012 and March 2015, the Company entered into several note purchase agreements and promissory notes with Xpliant to provide cash advances. Xpliant was a Delaware incorporated and privately held company, engaged in the design and development of next generation software defined network switch chips. Prior to the closing of the merger pursuant to the Xpliant merger agreement, the Company concluded that Xpliant was a VIE as the Company was Xpliant’s primary beneficiary due to the Company’s involvement with Xpliant and the Company’s purchase option to acquire Xpliant. As such, the Company has included the accounts of Xpliant in the consolidated financial statements. The Company had made total cash advances of $85.8 million, consisting of $10.0 million under nine convertible notes which, as amended, matured on August 31, 2014 and $75.8 million under several promissory notes which matured between April 2015 and March 2016. All promissory notes were cancelled as of July 31, 2015. The convertible notes and promissory notes bore an annual interest rate of 6%. In addition to the funding received by Xpliant from the Company, between May 2012 and January 2014, certain third party investors (“non-controlling interest”) made cash advances of $13.0 million under several convertible notes which, as amended, matured on August 31, 2014 and $2.9 million under a convertible security. All of the convertible notes bore interest at a rate of 6%, payable at maturity. Two of the convertible notes held by a third party investor with a principal amount of $1.0 million matured and were paid by Xpliant in December 2013. Pursuant to the convertible notes, in the event Xpliant closed a corporate transaction, as defined in the convertible notes, the holders of the convertible notes were entitled to receive two times the outstanding principal plus any unpaid accrued interest. The convertible security had the same features as the convertible notes, with the exception of the requirement for repayment, interest and maturity. For accounting purposes, the Company determined that the convertible security had derivative features and determined that the fair value of the derivative features of the convertible security at the issuance date was approximately the same as the principal amount. All of the convertible notes and the derivative feature of convertible security were classified as Level 3 liability and were all remeasured and presented at fair value in the consolidated financial statements at each reporting period. Pursuant to the option to acquire Xpliant, in June 2014, the Company provided notice to Xpliant of its decision to exercise the purchase option. Therefore, the convertible notes and derivative features of convertible security were valued to two times its principal amount at its maturity date. As such, the Company recorded the change in estimated fair value of notes payable and other of $14.9 million in the consolidated statement of operations in 2014. Pursuant to the Xpliant merger agreement between the Company and Xpliant as discussed in detail below, in October 2014, a portion of the cash advances made by the Company to Xpliant were used to settle all outstanding convertible notes, related accrued interest and convertible security held by non-controlling interest. On July 30, 2014, the Company entered into the Xpliant merger agreement, which was amended on October 8, 2014 and March 31, 2015 with Xpliant. Under the terms of the Xpliant merger agreement, as amended, the Company paid approximately $3.6 million in total cash consideration in exchange for all outstanding securities held by Xpliant’s stockholders. Pursuant to the Xpliant merger agreement, as amended, a first closing occurred on March 31, 2015 and the Company paid $2.5 million to Xpliant’s stockholders with respect to approximately 70% of the Xpliant stock outstanding and a second and final closing occurred on April 29, 2015 and the Company paid $1.1 million to Xpliant’s stockholders with respect to the then remaining approximately 30% of the Xpliant stock outstanding. Based on the substance of the transaction, the Company recorded the payments of cash consideration to Xpliant stockholders as a decrease to the Company’s additional paid-in capital within stockholders’ equity. Prior to the closing of the merger pursuant to the Xpliant merger agreement and the settlement of the outstanding convertible notes and convertible security to non-controlling interest, the net loss of Xpliant was allocated to the Company and to the non-controlling interest based on the outstanding cash advances provided to Xpliant at each reporting period.

Net Loss Per Common Share

Net Loss Per Common Share	12 Months Ended
Net Loss Per Common Share	Dec. 31, 2016
Earnings Per Share [Abstract]
Net Loss Per Common Share	3. Net Loss Per Common Share Basic net income (loss) per share is computed using the weighted-average common shares outstanding. Diluted net income per share is computed using the weighted-average common shares outstanding and any dilutive potential common shares. Diluted net loss per common share is computed using the weighted-average common shares outstanding and excludes all dilutive potential common shares when the Company is in a net loss position their inclusion would be anti-dilutive. The Company’s dilutive securities primarily include stock options and restricted stock units. The following outstanding options and restricted stock units were excluded from the computation of diluted net loss per common share for the periods presented because including them would have had an anti-dilutive effect: Year Ended December 31, 2016 2015 2014 (in thousands) Options to purchase common stock 1,194 2,028 2,626 Restricted stock units 4,119 2,194 2,465

Fair Value Measurements

Fair Value Measurements	12 Months Ended
Fair Value Measurements	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	4. Fair Value Measurements At December 31, 2016 and 2015, the Company’s cash equivalents comprised of an investment in a money market fund. In accordance with the guidance for fair value measurements and disclosures, the Company determined the fair value hierarchy of its money market fund as Level 1, which approximated $61.4 million and $102.2 million as of December 31, 2016 and 2015, respectively. The carrying amount of the Company’s accounts receivable, accounts payable and accrued expenses and other current liabilities approximate fair value due to their short term maturities. There are no other financial assets and liabilities, except those disclosed in Notes 2, 7, 11 and 13 of Notes to Consolidated Financial Statements that require Level 2 or Level 3 fair value hierarchy measurements and disclosures.

Balance Sheet Components

Balance Sheet Components	12 Months Ended
Balance Sheet Components	Dec. 31, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Balance Sheet Components	5. Balance Sheet Components Inventories As of December 31, 2016 2015 (in thousands) Work-in-process $ 61,363 $ 33,701 Finished goods 58,329 13,308 $ 119,692 $ 47,009 Property and equipment, net As of December 31, 2016 2015 (in thousands) Test equipment and mask costs $ 138,633 $ 71,021 Software, design tools, computer and other equipment 87,648 62,331 Furniture, office equipment and leasehold improvements 12,927 5,755 Construction in progress 4,767 - 243,975 139,107 Less: accumulated depreciation and amortization (93,113 ) (74,430 ) $ 150,862 $ 64,677 Depreciation and amortization expense was $46.7 million, $32.9 million and $19.5 million for years ended December 31, 2016, 2015 and 2014, respectively. Certain fully depreciated property and equipment have been eliminated from both the gross and accumulated amount as they were disposed of as the Company no longer utilized them. The Company leases certain design tools under financing arrangements which are included in property and equipment, which total cost, net of accumulated amortization amounted to $46.3 million and $25.3 million at December 31, 2016 and 2015, respectively. Amortization expense related to assets recorded under capital lease and certain financing arrangements was $16.8 million, $14.7 million and $9.5 million for the years ended December 31, 2016, 2015 and 2014, respectively. Sale of held for sale assets In September 2016, the Company began to actively market the real property located in Aliso Viejo, California that was acquired in the QLogic acquisition. The Company classified this real property as held for sale assets on its consolidated balance sheet as of September 30, 2016. On December 16, 2016, the Company completed the sale of this real property for a total net cash consideration of $32.4 million. Concurrently, the Company leased back the property on a month-to-month basis until the expected occupancy of the new leased property located in Irvine, California. See related discussions on the new lease agreement for the Irvine, California property in Note 13 of Notes to Consolidated Financial Statements. The first six months of the leaseback were rent free; thereafter, the rents will be lower than the market rates. For accounting purposes, these rents were deemed to have been netted against the sale proceeds and represent a prepaid rent. Accordingly, the Company recorded $1.8 million representing the off-market rental rate adjustment as prepaid rent on the consolidated balance sheets and such amount will be recognized as rent expense over the expected lease-back term. The Company adjusted fair value of the acquired property and equipment disclosed in the purchase price allocation in Note 2 of Notes to Financial Statements based upon the business combination guidance on measurement period and accordingly did not recognize a gain or loss upon the sale of the real property. Other Asset Acquisition In November 2016, the Company entered into an asset purchase agreement with a third party company. Pursuant to the asset purchase agreement, the Company acquired property and equipment of $9.2 million and IPR&D of $2.0 million. The IPR&D was recorded at its relative fair using the multi-period excess earnings valuation approach and was written off immediately as the asset had no alternative future use. Accrued expenses and other current liabilities As of December 31, 2016 2015 (in thousands) Accrued compensation and related benefits $ 18,197 $ 4,485 Deferred research and development costs 25,370 - Income tax payable 4,098 541 Restructuring related payables (Note 7) 3,653 - Professional fees 2,233 1,018 Accrued rebates 3,228 - Manufacturing rights payable (Note 13) 2,500 1,875 Accrued interest 1,427 - Other 4,261 1,524 $ 64,967 $ 9,443 Accrued Rebates In 2016, the Company started its rebate programs with certain customers. In addition, the Company assumed and continued the existing QLogic rebate programs following the closing of the QLogic acquisition. The Company assumed an outstanding rebate accrual of $2.1 million from the acquisition of QLogic. For the year ended December 31, 2016, the Company recorded estimated rebates amounting to $2.9 million and made rebate settlements of $1.8 million. As of December 31, 2016, total accrued rebates included within accrued expenses and other current liabilities was $3.2 million. Warranty Accrual The following table presents a rollforward of the warranty liability, which is included within accrued expenses and other current liabilities: Year Ended December 31, 2016 2015 2014 (in thousands) Beginning balance $ 336 $ 227 $ 167 Assumed warranty liability from the acquisition of QLogic 753 - - Accruals and adjustments 534 459 679 Settlements (702 ) (350 ) (619 ) Ending balance $ 921 $ 336 $ 227 Deferred revenue As of December 31, 2016 2015 (in thousands) Services/support and maintenance $ 7,773 $ 5,531 Software license/subscription 625 785 Distributor deferred margin 14 - $ 8,412 $ 6,316 Other non-current liabilities As of December 31, 2016 2015 (in thousands) Income tax payable (Note 9) $ 12,071 $ 915 Accrued rent 2,163 1,493 Customer deposits 1,103 109 Restructuring related payables (Note 7) 663 - Other 2,386 445 $ 18,386 $ 2,962

Goodwill and Intangible Assets,

Goodwill and Intangible Assets, Net	12 Months Ended
Goodwill and Intangible Assets, Net	Dec. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets, Net	6. Goodwill and Intangible Assets, Net 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. The carrying value of goodwill as of December 31, 2016 and 2015 was $241.1 million and $71.5 million, respectively. The change in the carrying value of goodwill from December 31, 2015 to December 31, 2016 was due to the goodwill additions from the acquisition of QLogic. See Note 2 of Notes to Consolidated Financial Statements for discussions related to the acquisition of QLogic. The Company reviews goodwill for impairment annually at the beginning of its fourth calendar quarter or whenever events or changes in circumstances that would more-likely-than-not reduce the fair value of a reporting unit below its carrying amount. The Company manages and operates as one reporting unit. The Company performed a qualitative assessment of the goodwill at the Company level as a whole and concluded that it was more-likely-than-not that goodwill is not impaired as of December 31, 2016 and 2015. In assessing the qualitative factors, the Company considered among others these key factors: (i) changes in the industry and competitive environment; (ii) market capitalization; (iii) stock price; and (iv) overall financial performance. Intangible assets, net As of December 31, 2016 Gross Accumulated Amortization Net Weighted average remaining amortization period (years) (in thousands) Existing and core technology - product $ 620,110 $ (78,017 ) $ 542,093 5.63 Technology licenses 130,676 (48,225 ) 82,451 4.68 Customer contracts and relationships 53,315 (4,161 ) 49,154 9.62 Trade name 15,596 (3,309 ) 12,287 4.63 Total amortizable intangible assets $ 819,697 $ (133,712 ) $ 685,985 5.18 IPR&D 78,900 - 78,900 Total intangible assets $ 898,597 $ (133,712 ) $ 764,885 As of December 31, 2015 Gross Accumulated Amortization Net Weighted average remaining amortization period (years) (in thousands) Existing and core technology - product $ 41,711 $ (41,115 ) $ 596 0.99 Technology licenses 70,521 (35,625 ) 34,896 6.10 Customer contracts and relationships 2,215 (2,215 ) - - Trade name 2,296 (2,296 ) - - Total amortizable intangible assets $ 116,743 $ (81,251 ) $ 35,492 6.01 Amortization expense was $52.6 million, $9.6 million and $14.6 million for the years ended December 31, 2016, 2015 and 2014, respectively. Certain fully amortized intangible assets have been eliminated from both the gross and accumulated amortization amounts. The following table presents the estimated future amortization expense of amortizable intangible assets as of December 31, 2016 (in thousands): 2017 $ 125,146 2018 123,521 2019 121,030 2020 116,983 2021 109,635 2022 and thereafter 89,670 $ 685,985

Restructuring Accrual

Restructuring Accrual	12 Months Ended
Restructuring Accrual	Dec. 31, 2016
Restructuring And Related Activities [Abstract]
Restructuring Accrual	7. Restructuring Accrual In connection with a workforce reduction during the year ended December 31, 2014, the Company incurred and paid $1.4 million severance and other benefits. There was no restructuring activity during the year ended December 31, 2015. The following table summarizes the activity and the outstanding balances of the restructuring liability as of and for the year ended December 31, 2016: As of December 31, 2016 Severance and other benefits Excess Facility Related Cost Total (in thousands) Balance at beginning of the year $ - $ - $ - Assumed restructuring liability from the acquisition of QLogic - 4,215 4,215 Additions 12,018 - 12,018 Cash payments (10,857 ) (1,060 ) (11,917 ) Balance at end of the year $ 1,161 $ 3,155 $ 4,316 Current portion of the restructuring related liabilities $ 1,161 $ 2,492 $ 3,653 Long-term portion of restructuring related liabilities $ - $ 663 $ 663 Following the acquisition of QLogic, the Company assumed outstanding liabilities from the restructuring initiatives undertaken by QLogic prior to the acquisition. This restructuring initiative was designed to enhance product focus and streamline the business operations. The assumed restructuring liability was related to the excess facility which was calculated based on the discounted future lease payments. This non-recurring fair value measurement was classified as Level 3 fair value hierarchy measurements and disclosures. The outstanding excess facility related restructuring liability is expected to be settled over the term of the related agreement through April 2018. In addition, the Company recorded employee severance expense of $12.0 million within sales, general and administrative on the consolidated statement of operations for the year ended December 31, 2016 related to actions following the acquisition of QLogic and integration of QLogic with the Company. The amount has been substantially paid as of December 31, 2016 and the remaining unpaid balance is expected to be settled in 2017.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
Stockholders' Equity	Dec. 31, 2016
Stockholders Equity Note [Abstract]
Stockholders' Equity	8. Stockholders’ Equity Common and Preferred Stock As of December 31, 2016 and 2015, the Company is authorized to issue 200,000,000 shares of $0.001 par value common stock and 10,000,000 shares of $0.001 par value preferred stock. The Company is authorized to issue preferred stock in one or more series and to fix the rights, preferences, privileges and restrictions thereof, including dividend rights, dividend rates, conversion rights, voting rights, terms of redemption and liquidation preferences. 2001 Stock Incentive Plan The Company’s 2001 Stock Incentive Plan (the “2001 Plan”) expired as of December 31, 2011, thus as of December 31, 2016 there were no outstanding shares reserved for issuance. Options granted under the 2001 Plan were either incentive stock options or non-statutory stock options as determined by the Company’s board of directors. Options granted under the 2001 Plan vested at the rate specified by the plan administrator, typically with 1/8th of the shares vesting six months after the date of grant and 1/48th of the shares vesting monthly thereafter over the next three and one half years to four and one half years. The term of option expire ten years from the date of grant. 2007 Equity Incentive Plan Upon completion of its IPO in May 2007, the Company adopted the 2007 Equity Incentive Plan, the (“2007 Plan”), which initially reserved 5,000,000 shares of the Company’s common stock. The 2007 Plan provides for the grant of incentive stock options, non-statutory stock options, restricted stock awards, restricted stock unit awards, stock appreciation rights, performance stock awards, and other forms of equity compensation (collectively, “stock awards”), and performance cash awards, all of which may be granted to employees (including officers), directors, and consultants or affiliates. Awards granted under the 2007 Plan vest at the rate specified by the plan administrator, for stock options, typically with 1/8th of the shares vesting six months after the date of grant and 1/48th of the shares vesting monthly thereafter over the next three and one half years and for restricted stock unit awards typically with quarterly vesting over four years. The term of awards expires seven to ten years from the date of grant. As of December 31, 2016, there were 8,863,022 shares reserved for issuance under the 2007 Plan. 2016 Equity Incentive Plan On June 15, 2016, the Company adopted the 2016 Equity Incentive Plan (the “2016 EIP”), which initially reserved for issuance 3,600,000 shares of the Company’s common stock. The 2016 EIP is intended as the successor to and continuation of the Company’s 2007 Plan and following the adoption of the 2016 EIP, no more awards will be granted from the 2007 Plan. The 2016 EIP provides for the grant of incentive stock options, non-statutory stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards, performance stock awards, performance cash awards and other stock awards, which may be granted to employees, directors and consultants. Following the effective date, no additional awards may be granted under the 2007 Plan. All outstanding awards granted under the 2007 EIP will remain subject to the terms of such plan, provided however, that the following shares of common stock subject to any outstanding stock award granted under the 2007 Plan (collectively, the “2007 Plan Returning Shares”) will immediately be added to the share reserve as and when such shares become 2007 Plan Returning Shares and become available for issuance pursuant to awards granted under the 2016 EIP: . QLogic 2005 Plan Following the closing of the acquisition of QLogic, the Company assumed and will continue the QLogic 2005 Performance Incentive Plan (the “QLogic 2005 Plan”). Following the closing of the acquisition of QLogic, the total shares available for future grant under the QLogic 2005 Plan was 3,612,039 shares of the Company’s common stock. The QLogic 2005 Plan provides for the issuance of restricted stock unit awards, incentive and non-qualified stock options, and other stock-based incentive awards. Restricted stock unit awards, or RSUs, granted pursuant to the QLogic 2005 Plan to employees subject to a service condition generally vest over four years from the date of grant. Stock options granted pursuant to the QLogic 2005 Plan to employees have ten year terms and generally vest over four years from the date of grant. Stock Options Detail related to stock option activity is as follows: Number of Options Outstanding Weighted Average Exercise Price Balance as of December 31, 2013 3,552,216 $ 17.79 Options granted 165,000 38.78 Options exercised (1,082,914 ) 14.05 Options cancelled and forfeited (8,042 ) 28.46 Balance as of December 31, 2014 2,626,260 20.62 Options granted 87,178 64.70 Options exercised (685,439 ) 14.02 Options cancelled and forfeited - - Balance as of December 31, 2015 2,027,999 24.75 Options granted 175,776 48.88 Assumed from the acquisition 1,045 34.63 Options exercised (1,010,670 ) 11.31 Options cancelled and forfeited (161 ) 32.40 Balance as of December 31, 2016 1,193,989 39.68 The aggregate intrinsic value for options exercised during the years ended December 31, 2016, 2015 and 2014, was $41.5 million, $37.4 million and $36.2 million, respectively, representing the difference between the closing price of the Company’s common stock at the date of exercise and the exercise price paid. The following table summarizes information about stock options outstanding as of December 31, 2016: Outstanding Options Exercisable Options Exercise Prices Number of Shares Weighted Average Remaining Contractual Term Weighted Average Exercise Price Number of shares Weighted Average Exercise Price Aggregate Intrinsic Value $8.52 - $33.44 149,523 1.31 $ 25.53 149,523 $ 25.53 $35.73 - $36.54 180,529 2.16 35.73 180,373 35.73 $37.22 - $37.55 205,688 1.19 37.22 205,688 37.22 $37.63 - $37.63 204,293 3.22 37.63 190,893 37.63 $37.83 - $42.01 178,953 3.54 38.71 136,075 38.98 $43.62 - $76.38 275,003 5.75 53.98 58,617 63.11 $8.52 - $76.38 1,193,989 3.10 $ 39.68 921,169 $ 37.02 $ 27,368,172 Exercisable 921,169 2.39 $ 37.02 $ 23,593,675 Vested and expected to vest 1,172,678 3.05 $ 39.50 $ 27,101,509 The aggregate intrinsic value for options outstanding at December 31, 2016, represents the difference between the weighted average exercise price and the closing price of the Company’s common stock at December 31, 2016, as reported on The NASDAQ Global Market, for all in the money options outstanding. The estimated weighted-average grant date fair value of options granted for years ended December 31, 2016, 2015 and 2014 was $18.65 per share, $23.79 per share, and $14.63 per share, respectively. The fair value of each option grant for the years ended December 31, 2016, 2015 and 2014 were estimated on the date of grant using the Black-Scholes option-pricing model using the assumptions below. Year Ended December 31, 2016 2015 2014 Risk-free interest rate 1.11% 1.34% to 1.41% 1.26% to 1.47% Expected life 4.96 years 3.77 to 4.58 years 3.77 to 4.53 years Dividend yield 0% 0% 0% Volatility 42.51% 40.96% to 43.03% 43.8% to 45.1% As of December 31, 2016, there was $3.9 million of unrecognized compensation cost, net of estimated forfeitures, related to stock options granted under the 2007 Plan, the Company’s 2001 Stock Incentive Plan and the QLogic 2005 Plan. The unrecognized compensation cost is expected to be recognized over a weighted average period of 2.50 years. Restricted Stock Units A summary of the activity of RSU for the related periods are presented below: Number of Shares Weighted- Average Grant Date Fair Value Per Share Balance as of December 31, 2013 1,776,170 $ 35.64 Granted 1,970,094 41.32 Issued and released (1,154,123 ) 37.55 Cancelled and forfeited (127,394 ) 37.05 Balance as of December 31, 2014 2,464,747 39.21 Granted 955,592 61.82 Issued and released (1,115,525 ) 40.94 Cancelled and forfeited (110,746 ) 45.82 Balance as of December 31, 2015 2,194,068 47.85 Granted 2,482,048 53.22 Assumed from the acquisition 1,301,199 51.55 Vested (1,583,775 ) 47.60 Cancelled and forfeited (274,221 ) 53.37 Balance as of December 31, 2016 4,119,319 51.98 For the year ended December 31, 2016, the Company issued 1,547,694 shares of common stock in connection with the vesting of RSUs. The difference between the number of RSUs vested and the shares of common stock issued for the year ended December 31, 2016 is the result of RSUs withheld in satisfaction of minimum tax withholding obligations associated with the vesting. The total intrinsic value of the RSUs outstanding as of December 31, 2016 was $256.9 million, representing the closing price of the Company’s stock on December 31, 2016, multiplied by the number of non-vested RSUs expected to vest as of December 31, 2016. In February 2015, the Company granted one-year and two-year performance-based RSUs with grant date fair values of $2.1 million and $0.7 million, respectively. In February 2016, the Company granted one-year performance-based RSUs with a grant date fair value of $2.9 million. The Company recorded the related stock-based compensation expense based on its evaluation of the probability of achieving the milestones of all of the outstanding performance-based RSUs as of December 31, 2016 and 2015. At each reporting period, the Company evaluates the probability of achieving the milestone of each of the outstanding performance-based RSUs and updates the recognition of related stock-based compensation expense. The Company also granted four-year vesting market-based RSUs in February 2015 with a grant date fair value of $1.5 million. In February 2016, the Company granted three-year vesting market-based RSUs with a grant date fair value of $3.3 million. These market-based RSUs will vest if: (i) during the performance period, the Company’s total stockholder return over a period of 30 consecutive trading days is equal to or greater than that of the price per share with respect to the February 2015 grant and industry index with respect to the February 2016 grant, set by the compensation committee of the board of directors; and (ii) the recipient remains in continuous service with the Company through such vesting period. The fair value of the market-based RSU was determined by management using the Monte Carlo simulation method which takes into account multiple input variables that determine the probability of satisfying the market conditions stipulated in the award. This method requires the input of assumptions, including the expected volatility of the Company’s common stock, and a risk-free interest rate, similar to assumptions used in determining the fair value of the stock option grants discussed above. The Company recorded the related stock-based compensation expense for the years ended December 31, 2016 and 2015 related to these grants. As of December 31, 2016, there was $164.8 million of unrecognized compensation costs, net of estimated forfeitures, related to RSUs granted under the 2007 Plan, 2016 EIP and the QLogic 2005 Plan Stock-Based Compensation The following table presents the detail of stock-based compensation expense amounts included in the consolidated statements of operations for each of the periods presented: Year Ended December 31, 2016 2015 2014 (in thousands) Cost of revenue $ 1,389 $ 765 $ 954 Research and development 41,701 29,085 32,328 Sales, general and administrative 42,240 18,447 19,177 $ 85,330 $ 48,297 $ 52,459 The total stock-based compensation cost capitalized as part of inventory as of December 31, 2016 and 2015 was not material.

Income Taxes

Income Taxes	12 Months Ended
Income Taxes	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	9. Income Taxes The following table presents the provision for income taxes and the effective tax rates: Year Ended December 31, 2016 2015 2014 (in thousands) Loss before income taxes $ (146,212 ) $ (15,378 ) $ (24,182 ) Provision for income taxes 997 1,682 1,633 Effective tax rate (0.7 )% (10.9 )% (6.8 )% The provision for income taxes for the year ended December 31, 2016 was primarily related to tax on earnings in foreign jurisdictions and the deferred tax liability related to the indefinite lived intangible assets. The provision for income taxes for the years ended December 31, 2015 and 2014 was primarily related to earnings in foreign jurisdictions. As discussed in Note 2 of Notes to Consolidated Financial Statements, during the third quarter of 2016 upon closing of the acquisition, the Company recorded a partial release of its net deferred tax assets valuation allowance primarily due to a net deferred tax liability recorded for purchased intangibles and recognized a $82.9 million The domestic and foreign components of income (loss) before income tax expense were as follows: Year Ended December 31, 2016 2015 2014 (in thousands) Domestic $ (147,752 ) $ (37,109 ) $ (42,318 ) Foreign 1,540 21,731 18,136 $ (146,212 ) $ (15,378 ) $ (24,182 ) The provision for income taxes consists of the following: Year Ended December 31, 2016 2015 2014 (in thousands) Current tax provision (benefit) Domestic $ 51 $ (15 ) $ 19 Foreign 3,084 1,034 1,230 3,135 1,019 1,249 Deferred tax provision (benefit) Domestic 775 564 627 Foreign (2,913 ) 99 (243 ) (2,138 ) 663 384 Provision for income taxes $ 997 $ 1,682 $ 1,633 The Company’s effective tax rate differs from the United States federal statutory rate as follows: Year Ended December 31, 2016 2015 2014 Income tax at statutory rate 35.0 % 35.0 % 35.0 % Stock compensation costs (2.9 ) (13.1 ) 5.6 Other (1.8 ) (0.1 ) 0.6 Convertible securities - - (4.2 ) State taxes, net of federal benefit (0.1 ) (0.1 ) (0.4 ) Foreign income inclusion in the United States 6.8 (4.9 ) (0.5 ) Research and development credits 4.1 42.6 24.2 Foreign tax rate differential (32.1 ) 41.5 19.6 Change in valuation allowance (9.7 ) (111.8 ) (86.7 ) Total (0.7 )% (10.9 )% (6.8 )% On July 27, 2015, the United States Tax Court in Altera Corp. v. Commissioner, 145 T.C. No. 3 (2015) issued an opinion with respect to Altera’s litigation with the Internal Revenue Service, concerning the treatment of stock-based compensation expense in an inter-company cost sharing arrangement. In ruling in favor of Altera, the Tax Court invalidated the portion of the Treasury regulations requiring the inclusion of stock-based compensation expense in such inter-company cost-sharing arrangements. Accordingly, the Company adjusted its inter-company arrangement to reflect the recent ruling. There was no material impact on the Company’s consolidated financial statements as of and for the year ended December 31, 2016 considering the full valuation allowance on the Company’s federal and state net deferred tax assets. QLogic had a similar global structure prior to the acquisition and the Company is currently evaluating various alternatives to integrate the two groups of entities. The Company’s QLogic subsidiary has not amended its inter-company arrangement to exclude stock-based compensation The tax effects of the temporary differences that give rise to deferred tax assets and liabilities are as follows: As of December 31, 2016 2015 (in thousands) Deferred tax assets: Tax credits $ 77,569 $ 47,113 Net operating loss carryforwards 257,286 40,325 Capitalized research and development 15,077 18,093 Intangible assets - 6,374 Depreciation and amortization 389 1,970 Stock compensation 14,372 10,813 Other 9,887 2,845 Gross deferred tax assets 374,580 127,533 Less: valuation allowance (315,915 ) (127,328 ) Net deferred tax assets 58,665 205 Deferred tax liabilities: Intangible assets (55,788 ) (3,400 ) Unremitted foreign earnings (21,171 ) - Net deferred tax liabilities $ (18,294 ) $ (3,195 ) Reported As Deferred tax assets, non-current $ 480 $ 222 Deferred tax liabilities, non-current (18,774 ) (3,417 ) Net deferred tax liabilities $ (18,294 ) $ (3,195 ) As of December 31, 2016, the Company had total net operating loss carryforwards for federal and states of California and Massachusetts income tax purposes of $1,408.0 million and $496.1 million, respectively. If not utilized, these federal and state net operating loss carryforwards will expire beginning in 2020 and 2017, respectively. The federal and states of California and Massachusetts net operating loss carryforwards include excess windfall deductions of $260.7 million and $143.0 million, The Company is tracking the portion of its deferred tax assets attributable to stock option benefits in a separate memo account pursuant to the accounting guidance for stock-based compensation. Therefore, these amounts are no longer included in the Company’s gross or net deferred tax assets. Pursuant to the guidance for stock-based compensation, the stock option benefits of approximately $101.7 million will be recorded within stockholders’ equity when it reduces cash taxes payable. The Company uses the “with and without” approach in determining when excess tax benefits have been realized, and the Company considers the direct effects of stock option deductions to calculate excess tax As of December 31, 2016, the Company also had federal and state research and development tax credit carryforwards of approximately $59.3 million and $75.9 million, respectively. The federal and state tax credit carryforwards will expire commencing 2020 and 2017, respectively, except for the California research tax credits which carry forward indefinitely. The Company also has various foreign and alternative minimum tax credits of approximately $1.1 million The Company’s net deferred tax assets relate predominantly to its United States tax jurisdiction. A full valuation allowance against the Company federal and state net deferred tax assets has been in place since 2012. The Company periodically evaluates the realizability of its net deferred tax assets based on all available evidence, both positive and negative. The realization of net deferred tax assets is dependent on the Company's ability to generate sufficient future taxable income during periods prior to the expiration of tax attributes to fully utilize these assets. The Company weighed both positive and negative evidence and determined that there is a continued need for a valuation allowance on its federal and state deferred tax assets as of December 31, 2015 and 2016. The Company reviews whether the utilization of its net operating losses and research credits are subject to an annual limitation due to the ownership change limitations provided by the Internal Revenue Code and similar state provisions. Utilization of these carryforwards is restricted and results in some amount expiring prior to benefiting the Company. The deferred tax assets shown above have been adjusted to reflect these expiring carryforwards. During 2016, the Company repatriated $50.0 million from its offshore operations. The Company recorded no tax expense related to this cash repatriation due to the utilization of net operating losses. Additionally, in connection with a review of the Company’s cash position and anticipated cash needs for investment in the Company’s core business, including principal prepayments to the Company’s outstanding Term Loan Facility, the Company determined that the current earnings from certain QLogic foreign entities will no longer be indefinitely reinvested, and the Company has provided a deferred tax liability for anticipated United States federal income taxes. For all remaining Cavium foreign entities, the Company will continue to indefinitely reinvest foreign earnings. The undistributed earnings approximately $359.7 million and $38.3 million as of December 31, 2016 and 2015, respectively. Upon distribution of those earnings in the form of dividends or otherwise, the Company would be subject to both United States income taxes (subject to an adjustment for foreign tax credits) and withholding taxes payable to various foreign countries. As of December 31, 2016 and 2015, the computation of potential United States income tax of a future distribution is impracticable. The following table summarizes the activity related to the unrecognized tax benefits: Year Ended December 31, 2016 2015 2014 (in thousands) Balance at beginning of the year $ 19,709 $ 16,270 $ 14,625 Gross increases related to current year's tax positions 5,640 3,138 1,446 Gross increase resulting from the acquisition of QLogic 179,366 - - Gross increases (decreased) related to prior year's tax positions (383 ) 398 199 Releases related to prior year's tax positions (1,917 ) (97 ) - Balance at the end of the year $ 202,415 $ 19,709 $ 16,270 The gross increase resulting from the acquisition of QLogic was primarily related to the unrecognized tax benefits against the additional tax assets identified in the measurement period but existed as of the acquisition date. Also included in the unrecognized tax benefits at December 31, 2016 is $12.1 million that, if recognized, would reduce the Company’s annual effective tax rate after considering the valuation allowance. The Company’s practice is to recognize interest and/or penalties related to income tax matters in income tax expense. The Company has accrued $2.8 million potential penalties and interest during the year ended December 31, 2016. Beginning in 2011, the Company is operating under tax incentives in Singapore, which are effective through February 2020. The tax incentives are conditional upon the Company meeting certain employment, revenue, and investment thresholds. The Company realized benefits from the reduced tax rate for the periods presented as follows: Year Ended December 31, 2016 2015 2014 (in thousands) Provision for Singapore entity at statutory tax rate of 17% $ 973 $ 811 $ 719 Provision for Singapore entity in the consolidated statement of operations 363 310 303 Benefit from preferential tax rate differential $ 610 $ 501 $ 416 Impact of tax benefits per basic and diluted share $ 0.01 $ 0.01 $ 0.01 The Company’s major tax jurisdictions are the United States federal government, the states of California and Massachusetts, China, India, Ireland, Israel, Japan, Singapore and the United Kingdom. The Company files income tax returns in the United States federal jurisdiction, the states of California and Massachusetts, various other states, and foreign jurisdictions in which it has a subsidiary or branch operations. The United States federal corporation income tax returns beginning with the 2000 tax year remain subject to examination by the Internal Revenue Service, or IRS. The California corporation income tax returns beginning with the 2000 tax year remain subject to examination by the California Franchise Tax Board. As of December 31, 2016, QLogic’s 2014 tax year is under audit by the IRS. There are no on-going foreign tax audits other than in various India tax jurisdictions which are under income tax audits for certain tax years between 2008 and 2015. The Company does not expect any material tax adjustments from either of these audits.

Retirement Plan

Retirement Plan	12 Months Ended
Retirement Plan	Dec. 31, 2016
Compensation And Retirement Disclosure [Abstract]
Retirement Plan	10. Retirement Plan The Company has established a defined contribution savings plan under Section 401(k) of the Internal Revenue Code for substantially all United States employees. This plan covers substantially all United States employees who meet minimum age and service requirements and allows participants to defer a portion of their annual compensation on a pre-tax basis. The Company matches 50% of the employees’ annual contribution up to two thousand dollars per employee. The Company contributions to the plan may be made at the discretion of the Company’s board of directors. For the years ended December 31, 2016, 2015 and 2014, the Company’s defined contribution expense was $1.5 million, $1.1 million and $1.0 million, respectively. In connection with local foreign laws, the Company is required to have a tenured-based defined benefit plan for its employees in certain non-US locations. The Company’s tenured-based payout liability is calculated based on the salary of each employee multiplied by the years of such employee’s employment, and is reflected on the Company’s consolidated balance sheets in other non-current liabilities on an accrual basis. The total expense and total obligation for these plans were not material to the consolidated financial statements

Debt

Debt	12 Months Ended
Debt	Dec. 31, 2016
Debt Disclosure [Abstract]
Debt	11. Debt On August 16, 2016, the Company entered into a Credit Agreement with JPMorgan Chase Bank, N.A. (“JPMCB”), as administrative agent and collateral agent, the other agents party thereto and the lenders referred to therein (collectively, the “Lenders”). The Lenders provided (i) a $700.0 million six year term B loan facility (the “Initial Term B Loan Facility”) and (ii) a $50.0 million interim term loan facility (the “Interim Term Loan Facility”, (i) and (ii) together, the “Term Facility”) to finance the acquisition of QLogic and pay fees and expenses of such acquisition. The outstanding debt under the Term Facility are collateralized by a lien on substantially all of the Company’s assets. The interest rates applicable to loans outstanding under the Credit Agreement with respect to the Initial Term B Loan Facility are, at the Company's option, equal to either a base rate plus a margin of 2.00% per annum or LIBOR plus a margin of 3.00% per annum. In no event shall the LIBOR for any interest period be less than 0.75% with respect to the Initial Term B Facility. The Initial Term B Loan Facility will mature on August 16, 2022 and requires quarterly principal payments commencing on December 31, 2016 equal to 0.25% of the aggregate original principal amount, with the balance payable at maturity (in each case subject to adjustment for prepayments). The interest rates applicable to loans outstanding under the Credit Agreement with respect to the Interim Term Loan Facility are, at the Company's option, equal to either a base rate plus a margin of 1.00% per annum or LIBOR plus a margin of 2.00% per annum. In October 2016, the Company paid the outstanding Interim Term Loan Facility. As of December 31, 2016, the carrying value of the Term Facility approximates the fair value. The Company classified this under Level 2 fair value measurement hierarchy as the borrowings are not actively traded and have variable interest structure based upon market rates currently available to the Company for debt with similar terms and maturities. The following table summarizes the outstanding borrowings from the Term Facility as of December 31, 2016: Principal Outstanding Unamortized Deferre d Principal Outstanding, net of Unamortized Deferred Financing Costs Current Portion of Long-Term Debt Long- Term Debt (in thousands) Initial Term B Loan Facility $ 698,250 $ 18,971 $ 679,279 $ 3,865 $ 675,414 In January 2017, the Company made payments totaling $86.0 million towards the outstanding principal balance of the Initial Term B Loan. The deferred financing costs associated with the Term Facility were recorded as a reduction to principal outstanding in the consolidated balance sheets and is being amortized over the term of the Term Facility. For the year ended December 31, 2016, the Company recognized contractual interest expense and amortization of deferred financing costs of $10.2 million and $1.6 million, respectively. The Credit Agreement contains customary representations and warranties and affirmative and negative covenants that, among other things, restrict the ability of the Company and its subsidiaries to create or incur certain liens, incur or guarantee additional indebtedness, merge or consolidate with other companies, payment of dividends, transfer or sell assets and make restricted payments. These covenants are subject to a number of limitations and exceptions set forth in the Credit Agreement. The Company is in compliance with these covenants as of December 31, 2016.

Segment and Geographic Informat

Segment and Geographic Information	12 Months Ended
Segment and Geographic Information	Dec. 31, 2016
Segment Reporting [Abstract]
Segment and Geographic Information	12. Segment and Geographic Information Operating segments are based on components of the Company that engage in business activity that earn revenue and incur expenses and (a) whose operating results are regularly reviewed by the Company’s chief operating decision maker, or CODM, to make decisions about resource allocation and performance and (b) for which discrete financial information is available. The Company manages and operates as one reportable segment. The closing of the acquisition of QLogic did not change the Company’s reportable segment as management views and operates the combined companies as one reportable segment. T he Company implemented a plan developed prior to the completion of the QLogic acquisition and began to immediately integrate QLogic into the Company’s existing operations, engineering groups, sales distribution networks and management structure. The net revenue by markets for the periods indicated was as follows: Year Ended December 31, 2016 2015 2014 (in thousands) Enterprise, datacenter, and service provider markets $ 568,812 $ 377,809 $ 341,056 Broadband and consumer markets 34,502 34,935 31,922 $ 603,314 $ 412,744 $ 372,978 Revenues by geographic area are presented based upon the ship-to location of the original equipment manufacturers, the contract manufacturers or the distributors who purchased the Company’s products. For sales to the distributors, their geographic location may be different from the geographic locations of the ultimate end customers. Net revenues by geographic area are as follows: Year Ended December 31, 2016 2015 2014 (in thousands) United States $ 196,727 $ 128,431 $ 111,997 China 139,957 100,980 93,045 Korea 54,367 28,578 28,665 Taiwan 39,839 34,533 29,229 Mexico 28,563 34,452 27,184 Finland 38,768 38,283 44,976 Singapore 20,982 3,767 2,421 Malaysia 16,482 11,728 9,059 Other countries 67,629 31,992 26,402 Total $ 603,314 $ 412,744 $ 372,978 The following table sets forth tangible long lived assets, which consist of property and equipment, net by geographic regions: As of December 31, 2016 2015 (in thousands) United States $ 115,328 $ 52,547 All other countries 35,534 12,130 Total $ 150,862 $ 64,677

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	13. Commitments and Contingencies The Company is not currently a party to any legal proceedings, the outcome of which, if determined adversely to the Company, would have a material adverse effect on the consolidated financial position, results of operations or cash flows of the Company. The Company leases its facilities under non-cancelable operating leases, which contain renewal options and escalation clauses, and expire on various dates ending in October 2025. Rent expense incurred under operating leases was $11.3 million, $8.0 million and $6.4 million for the years ended December 31, 2016, 2015 and 2014, respectively. On November 18, 2016, the Company entered into a lease agreement to lease approximately 105,600 square feet in a building located in Irvine, California. The lease term is 8 years and is expected to commence in October 2017. This leased facility is for the relocation of QLogic employees from real property previously owned located in Aliso Viejo, California. As discussed in Note 5 of Notes to Consolidated Financial Statements, the Company completed the sale of the previously owned real property located in Aliso Viejo, California, which the Company leased back on a month-to-month basis. The Company also has non-cancellable software and maintenance commitments which are generally billed on a quarterly basis. These commitments are included in the operating leases. The Company acquired certain assets under capital lease and technology license obligations. The capital lease and technology license obligations include future cash payments payable primarily for license agreements with various outside vendors. For license agreements which qualify under capital lease and where installment payments extend beyond one year, the present value of the future installment payments are capitalized and included as part of intangible assets or property and equipment which is amortized over the estimated useful lives of the related licenses. In July 2016, the Company signed design kit license agreements with a third party vendor for an aggregate consideration of $9.0 million, payable in four equal installments. The first installment was due on the effective date of the agreement and the remaining installment payments are due in the succeeding quarters following the effective date. The aggregate total consideration was recorded as intangible assets which will be amortized over the term of the license and the related liability was recorded under capital lease and technology license obligations. In July and September 2016, the Company signed design tools purchase agreements with a third party vendor for an aggregate total consideration of $15.6 million, payable in equal quarterly installments up to May 2019. The present value of the aggregate total consideration was recorded as design tools under property and equipment which will be amortized over the term of the license and the related liability was recorded under capital lease and technology license obligations. On September 27, 2016, the Company signed a new purchase agreement with a third party vendor for $31.5 million, payable in quarterly installments up to August 2019, in exchange for a three-year license to certain design tools effective October 1, 2016. This new purchase agreement replaced the purchase agreement entered into by the Company in October 2014 with the same third party company for $28.5 million in exchange for a three-year license to certain design tools. The present value of the aggregate total consideration was recorded as design tools under property and equipment which will be amortized over the term of the license and the related liability was recorded under capital lease and technology license obligations. As a result of the cancellation of the October 2014 purchase agreement in October 2016, the Company wrote-off the related design tools within property and equipment and the unpaid installment obligations under capital lease and technology license obligations. Minimum commitments under non-cancelable operating and capital lease agreements as of December 31, 2016 are as follows: Capital lease and technology license obligations Operating leases Total (in thousands) 2017 $ 26,919 $ 15,887 $ 42,806 2018 18,124 15,487 33,611 2019 10,643 14,569 25,212 2020 - 14,153 14,153 2021 - 13,110 13,110 2022 thereafter - 20,011 20,011 $ 55,686 $ 93,217 $ 148,903 Less: Interest component (3.75% annual rate) 2,273 Present value of minimum lease payment 53,413 Current portion of the obligations $ 25,535 Long-term portion of obligations $ 27,878 On January 31, 2017, the Company entered into a lease agreement to lease approximately 116,000 sq. ft. in a building located adjacent to the Company’s corporate headquarter in San Jose, California. The lease term is through July 2027 and the Company expects to occupy the building beginning October 2017. QLogic Manufacturing Rights Buy-outs The Company exercised non-cancellable options to purchase the manufacturing rights from a QLogic application specific integrated circuit, or ASIC, vendor effective at the closing of the acquisition of QLogic for certain QLogic ASIC products and on November 1, 2016 for certain other QLogic ASIC products. In consideration for the exercise of the manufacturing rights, the Company paid an aggregate of $55.0 million in September 2016. In addition, the Company paid a one-time royalty buy-out fee of $10.0 million for certain QLogic ASIC products. On September 29, 2016, the Company entered into an ownership transfer and manufacturing rights agreement with another QLogic third party ASIC vendor to acquire manufacturing rights and relieve the Company from future royalty obligations related to certain ASIC products. In consideration for this, the Company agreed to pay a total of $10.0 million. Subject to the terms of the agreement, the Company paid $7.5 million on the effective date of the agreement and the remaining $2.5 million was placed in escrow in November 2016, to be released on the earlier of (i) receipt of the validation notice that the related ASIC product has been put into production by the Company and (ii) transfer of specified assets to a third party vendor approved by the Company. The amount placed in escrow was classified within prepaid expense and other current assets on the consolidated balance sheets as of December 31, 2016. The Company determined that the total consideration amounting to $75.0 million as discussed above, pertained to the use of technologies and the cost associated with cancelling the exclusive rights to manufacture the related products. The Company estimated the components of the total consideration attributable to the use of technologies and the cost to cancel the exclusive manufacturing rights using market-based fair value estimation. The fair value estimation was determined based on inputs that are unobservable and significant to the overall fair value measurement. It was also based on estimates and assumptions made by management. As such this was Xpliant Manufacturing Rights Buy-out On March 30, 2015, Xpliant exercised its option to purchase the manufacturing rights to accelerate the takeover of manufacturing, and to relieve Xpliant from any further obligation to purchase product quantities from an Xpliant ASIC vendor. In consideration for this, Xpliant agreed to pay a $7.5 million manufacturing rights licensing fee and a per-unit royalty fee for certain ASIC products sold to certain customers for a limited time. The manufacturing rights licensing fee was payable in four equal quarterly payments, with the first installment payment due on April 29, 2015 and each of the subsequent three installment payments were due on the first day of the following calendar quarter. Considering the terms of the purchase of the manufacturing rights and the stage of development of the related ASIC products covered by the manufacturing rights, the Company recorded the full amount of the manufacturing rights licensing fee within research and development expense on the consolidated statement of operations in the first quarter of 2015 and the related liability was recorded within other accrued expenses and other current liabilities on the consolidated balance sheets. In 2015, the Company settled three installments due. The final installment payment was made in the first quarter of 2016.

Valuation and Qualifying Accoun

Valuation and Qualifying Accounts	12 Months Ended
Valuation and Qualifying Accounts	Dec. 31, 2016
Valuation And Qualifying Accounts [Abstract]
Valuation and Qualifying Accounts	Schedule II - Valuation and Qualifying Accounts Balance at beginning of period Additions Deductions Balance at end of period (in thousands) Year ended December 31, 2016 Allowance for doubtful accounts $ 24 $ 28 $ (28 ) $ 24 Allowance for customer returns 1,444 7,789 (5,127 ) 4,106 Income tax valuation allowance 127,328 188,587 - 315,915 Year ended December 31, 2015 Allowance for doubtful accounts $ 24 $ - $ - $ 24 Allowance for customer returns 1,118 4,513 (4,187 ) 1,444 Income tax valuation allowance 105,638 21,690 - 127,328 Year ended December 31, 2014 Allowance for doubtful accounts $ 24 $ 1 $ (1 ) $ 24 Allowance for customer returns 909 3,716 (3,507 ) 1,118 Income tax valuation allowance 79,928 25,710 - 105,638 All other schedules are omitted because they are inapplicable or the requested information is shown in the consolidated financial statements of the registrant or related notes thereto.

Organization and Significant 22

Organization and Significant Accounting Policies (Policies)	12 Months Ended
Organization and Significant Accounting Policies (Policies)	Dec. 31, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization	Organization Cavium, Inc., (the “Company”), was incorporated in the state of California on November 21, 2000 and was reincorporated in the state of Delaware effective February 6, 2007. The Company designs, develops and markets semiconductor processors for intelligent and secure networks. On August 16, 2016, the Company completed the acquisition of QLogic Corporation (“QLogic”). QLogic designs and supplies high performance server and storage networking connectivity products that provide, enhance and manage computer data communication used in enterprise, managed service provider and cloud service provider datacenters. See Note 2 of Notes to Consolidated Financial Statements for further discussion regarding the Company’s acquisition of QLogic.
Basis of Consolidation	Basis of Consolidation The consolidated financial statements include the accounts of Cavium, Inc. and its wholly owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. Prior to the closing of the acquisition of Xpliant, Inc. (“Xpliant”) in April 2015 as discussed in Note 2 of Notes to Consolidated Financial Statements, the Company accounted for Xpliant as a variable interest entity, or VIE. Under the accounting principles generally accepted in the United States of America, or US GAAP, a VIE is required to be consolidated by its primary beneficiary. The primary beneficiary is the party that absorbs a majority of the VIE’s anticipated losses and/or a majority of the expected returns. All intercompany transactions and balances have been eliminated in consolidation.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in its consolidated financial statements and accompanying notes. Management bases its estimates on historical experience and on various other assumptions it believes to be reasonable under the circumstances, the results of which form the basis of making judgments about the carrying values of assets and liabilities. Actual results could differ from those estimates.
Revenue Recognition	Revenue Recognition The Company primarily derives its revenue from sales of semiconductor products to original contract manufacturers, or OEM, or through OEM’s contract manufacturers or distributors. To a lesser extent, the Company also derive revenue from licensing software and related maintenance and support and from professional service arrangements. The Company recognizes revenue when (i) persuasive evidence of a binding arrangement exists; (ii) delivery has occurred or service has been rendered; (iii) the price is deemed fixed or determinable and free of contingencies and significant uncertainties; and (iv) collectibility is reasonably assured. The Company records a reduction in revenue for provision for estimated sales returns in the same period the related revenues are recorded. These estimates are based on historical patterns of return, analysis of credit memo data and other known factors at the time. The Company also records reductions of revenue for pricing adjustments, such as competitive pricing programs and rebates, in the same period that the related revenue is recorded. The Company accrues the full potential rebates at the time of sale and does not apply a breakage factor. The reversal of the accrual of unclaimed rebate will be made if the specific rebate programs contractually end and when the Company believes that the unclaimed rebates are no longer subject to payment. Revenue is recognized upon shipment to distributors with limited rights of returns and price protection if the Company concludes that it can reasonably estimate the credit for returns and price adjustments issuable. The Company records an estimated allowance, at the time of shipment, based on the Company’s historical patterns of returns and pricing credit of sales recognized upon shipment. Credits issued to distributors or other customers have historically not been material. The inventory at these distributors at the end of the period may fluctuate from time to time mainly due to the OEM production ramps and/or new customer demands. Software arrangements typically include time-based licenses for 12 months with related support. The Company does not sell support separately, therefore, revenue from software arrangements is recognized ratably over the support period. The software arrangement may also include professional services, and these services may be purchased separately. Professional services engagements are billed on either a fixed-fee or time-and-materials basis. For fixed-fee arrangements, professional services revenue is recognized under the proportional performance method, with the associated costs included in cost of revenue. The Company estimates the proportional performance of the arrangements based on an analysis of progress toward completion. The Company periodically evaluates the actual status of each project to ensure that the estimates to complete each contract remain accurate, and a loss is recognized when the total estimated project cost exceeds project revenue. If the amount billed exceeds the amount of revenue recognized, the excess amount is recorded as deferred revenue. Revenue recognized in any period is dependent on progress toward completion of projects in progress. To the extent we are unable to estimate the proportional performance, revenue is recognized on a completed performance basis. Revenue for time-and-materials engagements is recognized as the effort is incurred. For sales that include multiple deliverables, the Company allocates revenue based on the relative selling price of the individual components. When more than one element, such as hardware and services, are contained in a single arrangement, the Company allocates revenue between the elements based on each element’s relative selling price, provided that each element meets the criteria for treatment as a separate unit of accounting.
Accounting for Stock-Based Compensation	Accounting for Stock-Based Compensation The Company applies the fair value recognition provisions of stock-based compensation. The Company recognizes the fair value of the awards on a straight-line basis over its vesting periods. The Company estimates the grant date fair value of stock options using the Black-Scholes option valuation model. The Black-Scholes option-pricing model used to determine the fair value of stock options requires various subjective assumptions, including expected volatility, expected term and the risk-free interest rates. The stock price volatility assumption is estimated using the Company’s historical stock price volatility. For options granted beginning 2016, the Company used historical exercise patterns to estimate the expected life. Prior to 2016, the Company used the simplified method as permitted by the guidance on stock-based compensation to estimate the expected life since the Company had no sufficient history of weighted average period from the date of grant to exercise, cancellation, or expiration. The risk free interest rate is based on the implied yield currently available on United States. Treasury securities with an equivalent remaining term. For all restricted stock unit, or RSU, grants other than RSU grants with a market condition, the fair value of the RSU grant is based on the market price of the Company’s common stock on the date of grant. For performance-based RSU grants, the Company evaluates the probability of achieving the milestones for each of the outstanding performance-based RSU grants at each reporting period and updates the related stock-based compensation expense. The fair value of market-based RSUs is determined using the Monte Carlo simulation method which takes into account multiple input variables that determine the probability of satisfying the market conditions stipulated in the award. This method requires the input of assumptions, including the expected volatility of the Company’s common stock, and a risk-free interest rate, similar to assumptions used in determining the fair value of the stock option grants discussed above. The grant date fair value of RSUs, less estimated forfeitures, is recorded based upon the vesting method over the service period.
Income Taxes	Income Taxes The Company accounts for income taxes under the asset and liability method. Under this method, deferred tax assets, including those related to tax loss carryforwards and credits, and liabilities are determined based on the differences between the financial statement and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. A valuation allowance is recorded to reduce deferred tax assets when management cannot conclude that it is more-likely-than-not that the net deferred tax asset will be recovered. The valuation allowance is determined by assessing both positive and negative evidence to determine whether it is more-likely-than-not that deferred tax assets are recoverable; such assessment is required on a jurisdiction-by-jurisdiction basis. The Company recognizes uncertain tax positions when it meets a more-likely-than-not threshold. The Company recognizes potential accrued interest and penalties related to unrecognized tax benefits as income tax expense.
Business Combinations	Business Combinations The Company accounts for business combinations using the purchase 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 is separable or divisible from the acquired entity and capable of being sold, transferred, licensed, returned or exchanged. In accordance with the guidance provided under business combinations, the Company allocates the purchase price of business combinations to the tangible assets, liabilities and intangible assets acquired, including in-process research and development, or IPR&D, based on their estimated fair values. The excess purchase price over those fair values is recorded as goodwill. The Company’s valuation assumption of acquired assets and assumed liabilities requires significant estimates, especially with respect to intangible assets. The Company estimates the fair value based upon assumptions the Company believes to be reasonable, but which are inherently uncertain and unpredictable and, as a result, actual results may differ from estimates. Estimates associated with the accounting for acquisitions may change as additional information becomes available regarding the assets acquired and liabilities assumed. Acquisition-related costs, including advisory, legal, accounting, valuation and other costs, are expensed in the periods in which the costs are incurred. The results of operations of acquired businesses are included in the consolidated financial statements from the acquisition date.
Goodwill and Indefinite-Lived Intangible Assets	Goodwill and indefinite-lived intangible assets Goodwill is measured as the excess of the cost of an acquisition over the sum of the amounts assigned to tangible and identifiable intangible assets and liabilities assumed. The Company evaluates goodwill for impairment at its single reporting unit level at least on an annual basis in the fourth quarter of the calendar year or whenever events and changes in circumstances suggest that the carrying amount may not be recoverable from its estimated future cash flow. The Company performs a qualitative assessment to determine if any events have occurred or circumstances exist that would indicate that it is more-likely-than-not that a goodwill impairment exists. If any indicators exist based on the qualitative analysis that it is more-likely-than-not that a goodwill impairment exists, the quantitative test is required. Otherwise, no further testing is required. IPR&D acquired in an asset acquisition is capitalized only if it has an alternative future use. IPR&D recorded as an asset acquired through business combinations is not amortized but instead is tested annually for impairment, or more frequently when events or changes in circumstances indicate that the asset might be impaired. The Company initially assesses qualitative factors to determine whether it is more likely than not that the fair value of IPR&D is less than its carrying amount, and if so, the Company conducts a quantitative impairment test. The quantitative impairment test consists of a comparison of the fair value of IPR&D to its carrying amount. If the carrying value exceeds its fair value, an impairment loss is recognized in an amount equal to the difference. When an IPR&D project is complete, the related intangible asset becomes subject to amortization and impairment analysis as a long-lived asset.
Long-Lived Assets	Long-lived assets The Company reviews long-lived assets, including property and equipment and intangible assets, for impairment whenever events or changes in business circumstances indicate that the carrying amount of the assets (or asset group) may not be fully recoverable. Whenever events or changes in circumstances suggest that the carrying amount of long-lived assets may not be recoverable, the Company estimates the future cash flows expected to be generated by the assets (or asset group) from its use or eventual disposition. If the sum of the expected future cash flows is less than the carrying amount of those assets, the Company recognizes an impairment loss based on the excess of the carrying amount over the fair value of the assets. Significant management judgment is required in the grouping of long-lived assets and forecasts of future operating results that are used in the discounted cash flow method of valuation.
Inventories	Inventories Inventories consist of work-in-process and finished goods. Inventories not related to an acquisition are stated at the lower of cost (determined using the first-in, first-out method), or market value (estimated net realizable value). Inventories from acquisitions are stated at fair value at the date of acquisition. The Company writes down excess and obsolete inventory based on its age and forecasted demand, generally over a 12 month period, which includes estimates taking into consideration the Company’s outlook on uncertain events such as market and economic conditions, technology changes, new product introductions and changes in strategic direction. Actual demand may differ from forecasted demand and such differences may have a material effect on recorded inventory values. Inventory write-downs are not reversed until the related inventories have been sold or scrapped. Inventories acquired through business combinations are recorded at their acquisition date fair value, which is the estimated selling price less the costs of disposal and a normal profit allowance.
Property and Equipment	Property and Equipment Property and equipment are stated at cost and depreciated over their estimated useful lives using the straight-line method. Leasehold improvements are amortized over the shorter of estimated useful lives or unexpired lease term. Additions and improvements that increase the value or extend the life of an asset are capitalized. Upon retirement or sale, the cost of assets disposed of and the related accumulated depreciation are removed from the accounts and any resulting gain or loss is credited or charged to income. Ordinary repairs and maintenance costs are expensed as incurred. Estimated Software, design tools, computer and other equipment 1 to 5 years Test equipment and mask costs 1 to 5 years Furniture and office equipment 1 to 5 years The Company capitalizes the cost of fabrication masks that are reasonably expected to be used during production manufacturing. Such amounts are included within property and equipment and are depreciated over a period of 12 to 24 months and recorded as a component of cost of revenue. If the Company does not reasonably expect to use the fabrication mask during production manufacturing, the related mask costs are expensed to research and development in the period in which the costs are incurred. The Company leases certain design tools under financing arrangements which are included in property and equipment. The Company also capitalizes acquired internally used software in property and equipment. Subsequent additions, modifications or upgrades to internally used software are capitalized to the extent it provides additional usage or functionality.
Fair Value Measurements	Fair Value Measurements Fair value is the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The fair value hierarchy is based on three levels of inputs that may be used to measure fair value. The first two levels of inputs are considered observable and the last unobservable. A description of the three levels of inputs is as follows: • Level 1 – Quoted prices in active markets for identical assets or liabilities. • Level 2 – Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. • Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all highly liquid investments with an original or remaining maturity of 90 days or less at the date of purchase to be cash equivalents. Cash equivalents consist of an investment in a money market fund.
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts The Company reviews its allowance for doubtful accounts by assessing individual accounts receivable over a specific age and amount. The Company’s allowance for doubtful accounts were not significant as of December 31, 2016 and 2015.
Concentration of Risk	Concentration of Risk The Company’s products are currently manufactured, assembled and tested by third-party contractors in Asia. There are no long-term agreements with any of these contractors. A significant disruption in the operations of one or more of these contractors would impact the production of the Company’s products for a substantial period of time, which could have a material adverse effect on the Company’s business, financial condition and results of operations. Financial instruments that potentially subject the Company to a concentration of credit risk consist of cash, cash equivalents and accounts receivable. The Company deposits cash with credit worthy financial institutions. The Company has not experienced any losses on its deposits of cash. Management believes that the financial institutions the Company utilizes are reputable and, accordingly, minimal credit risk exists. The Company’s cash equivalents are invested in a money market fund. The Company follows an established investment policy and set of guidelines to monitor, manage and limit the Company’s exposure to interest rate and credit risk. The policy sets forth credit quality standards and limits the Company’s exposure to any one issuer, as well as the maximum exposure to various asset classes. A majority of the Company’s accounts receivable are derived from customers headquartered in the United States. The Company performs ongoing credit evaluations of its customers’ financial condition and, generally, requires no collateral from its customers. The Company provides an allowance for doubtful accounts receivable based upon the expected collectability of accounts receivable. Summarized below are individual customers whose accounts receivable balances were 10% or higher of the consolidated gross receivable: As of December 31, 2016 2015 Percentage of gross accounts receivable Customer A 15% 16% Customer B * 20% Customer C 12% * Customer D 11% * Customer E 11% * * Represents less than 10% of the gross accounts receivable for the respective period end. Summarized below are individual OEM customers whose revenue balances were 10% or higher of the consolidated net revenue: Year Ended December 31, 2016 2015 2014 Percentage of revenue by customer Customer B 12.0% 12.5% 16.6% Customer F 13.1% 18.4% 15.4% Customer G * 12.0% 12.4% * Represents less than 10% of the net revenue for the respective year ended
Deferred Revenue	Deferred revenue The Company records deferred revenue for customer billings and advance payments received from customers before the performance obligations have been completed and/or services have been performed for products and/or service related agreements. The Company records deferred revenue, net of deferred costs on shipments to sell-through distributors.
Warranty Accrual	Warranty Accrual The Company’s products are generally subject to a one-year warranty period though certain products carry a warranty for up to three years. The Company records a liability for product warranty obligations in the period the related revenue is recorded based on historical warranty experience.
Research and Development	Research and Development Research and development costs are expensed as incurred and primarily include personnel costs, prototype expenses, which include the cost of fabrication mask costs not reasonably expected to be used in production manufacturing, and allocated facilities costs as well as depreciation of equipment used in research and development.
Deferred Research and Development Cost	Deferred Research and Development Cost Occasionally, the Company receives funding from third party companies for certain collaboration research and development. The Company records the funding received as deferred research and development costs within accrued expense and other liabilities. The liability for deferred research and development cost will be reduced over time to offset the research and development expenses incurred by the Company related to such funding.
Advertising	Advertising The Company expenses advertising costs as incurred. Advertising expenses were $2.8 million, $2.5 million and $1.8 million for the years ended December 31, 2016, 2015 and 2014, respectively.
Operating Leases	Operating Leases The Company recognizes rent expense on a straight-line basis over the term of the lease. The difference between rent expense and rent paid is recorded as deferred rent in accrued expenses and other current and non-current liabilities on the consolidated balance sheets.
Other Comprehensive Income (Loss)	Other Comprehensive Income (Loss) Comprehensive income (loss) includes all changes in equity other than transactions with stockholders. The Company’s accumulated other comprehensive loss consists of foreign currency translation adjustments.
Foreign Currency Remeasurement	Foreign Currency Remeasurement Certain of the Company’s foreign subsidiaries utilize a functional currency other than United States dollars. Assets and liabilities of these subsidiaries are translated to United States dollars at exchange rates in effect at the balance sheet date, and income and expenses are translated at average exchange rates during the period. The resulting translation adjustments are recorded as a component of accumulated other comprehensive income (loss). Gains and losses resulting from transactions denominated in currencies other than the functional currency are included in other, net in the consolidated statements of operations were not material for the years ended December 31, 2016, 2015 and 2014.
Recent Accounting Standards	Recently Adopted Accounting Standards In January 2017, the FASB issued an update to the guidance on business combinations to clarify the definition of a business. This new guidance provides a more robust framework to use in determining when a set of assets and activities is a business. This new standard is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The new standard should be applied prospectively on or after the effective date. Early adoption of this new standard is allowed for transactions for which the acquisition date occurs before the issuance date or effective date of the amendments, only when the transaction has not been reported in financial statements that have been issued or made available for issuance. The Company early adopted this new guidance effective on its December 31, 2016 financial reporting. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements and related disclosures. In September 2015, the FASB issued an update to the business combinations standards simplifying the accounting for measurement period adjustments. The amendments in this update require that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The amendments in this update require that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. The amendments in this update require an entity to present separately on the face of the income statement or disclose in the notes the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. The update is effective for interim and annual periods beginning after December 15, 2015. The amendments in this update should be applied prospectively to adjustments to provisional amounts that occur after the effective date of this update with earlier application permitted for financial statements that have not been issued. The Company adopted this new guidance effective during its fourth quarter ended December 31, 2016. See Note 2 of Notes to Consolidated Financial Statements for discussion of measurement period adjustments relating to the QLogic acquisition. In April 2015, the FASB issued an update simplifying the presentation of debt issuance cost. This new guidance requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The new standard is effective for fiscal years beginning after December 15, 2015 and interim periods within those fiscal years. Early adoption is permitted for financial statements that have not been previously issued. The Company adopted this guidance during fiscal 2016 and has presented debt issuance costs as a direct deduction from the related debt liability. Recently Issued Accounting Standards Not Yet Effective In January 2017, the FASB issued an update to the 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 update is effective for goodwill impairment test in fiscal years beginning after December 15, 2019, though early adoption is permitted. The Company is currently assessing the impact of this new guidance. In November 2016, the FASB issued an update to the guidance on statement of cash flows - restricted cash presentation. This new guidance which requires entities to show the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flow. This standard is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period, but any adjustments must be reflected as of the beginning of the fiscal year that includes that interim period. The new standard must be adopted retrospectively. Upon adoption, the Company will present its statement of cash flows in accordance with this updated guidance. In October 2016, the FASB, issued an update to guidance on income taxes. This new guidance requires an entity to recognize the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. This new guidance is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted as of the beginning of an annual reporting period for which financial statements have not been issued or made available for issuance. The Company is currently evaluating the adoption date and the impact, if any, adoption will have on its financial position and results of operations. In August 2016, the FASB, issued a new guidance on cash flow classification of certain cash receipts and cash payments. This new guidance will make eight targeted changes to how cash receipts and cash payments are presented and classified in the statement of cash flows. The eight specific cash flow issues include: (i) debt prepayment or debt extinguishment costs, (ii) settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effecting interest rate of the borrowing, (iii) contingent consideration payments made after a business combination, (iv) proceeds from settlement of insurance claims, (v) proceeds from the settlement of corporate-owned life insurance policies, (vi) distributions received from equity method investees, (vii) beneficial interests in securitization transactions, and (viii) separately identifiable cash flows and application of the predominance principle. This new guidance is effective for fiscal years beginning after December 15, 2017 including interim periods during the annual period and require adoption on a retrospective basis unless it is impracticable to apply, in which case it would be required to apply the amendments prospectively as of the earliest date practicable. Early adoption is permitted. The Company will present its statement of cash flows in accordance with this guidance subsequent to adoption. In June 2016 the FASB issued an updated guidance on measurement of credit losses on financial instruments. This updated guidance introduces a new forward-looking approach, based on expected losses, to estimate credit losses on certain types of financial instruments, including trade receivables. The estimate of expected credit losses will require entities to incorporate considerations of historical information, current information and reasonable and supportable forecasts. This updated guidance also expands the disclosure requirements to enable users of financial statements to understand the entity’s assumptions, models and methods for estimating expected credit losses. This new guidance is effective for fiscal years beginning after December 15, 2020 including interim periods during the annual period. Early adoption is permitted for fiscal years beginning after December 15, 2015 including interim periods during the annual period. The Company is currently evaluating the impact of this updated guidance on its consolidated financial statements and related disclosures. In March 2016, the FASB issued an update to the guidance on stock-based compensation. Under the new guidance, all excess tax benefits and tax deficiencies will be recognized in the income statement as they occur. This will replace the current guidance, which requires tax benefits that exceed compensation cost (windfalls) to be recognized in equity. It will also eliminate the need to maintain a “windfall pool,” and will remove the requirement to delay recognizing a windfall until it reduces current taxes payable. The new guidance will also change the cash flow presentation of excess tax benefits, classifying them as operating inflows, consistent with other cash flows related to income taxes. Today, windfalls are classified as financing activities. Also, most companies with stock-based compensation will show additional dilutive effects in earnings per share, or EPS, calculations. This is because there will no longer be excess tax benefits recognized in additional paid in capital. Today those excess tax benefits are included in assumed proceeds from applying the treasury stock method when computing diluted EPS. Under the amended guidance, companies will be able to make an accounting policy election to either (1) continue to estimate forfeitures or (2) account for forfeitures as they occur. This updated guidance is effective for annual and interim periods beginning after December 15, 2016. Early adoption is permitted. Although the Company is currently evaluating the effect of this new guidance, the Company does not expect to have a material impact on its consolidated financial statements and related disclosures upon adoption of this standard. In February 2016, the FASB issued updated guidance on leases which requires a lessee to recognize the assets and lease liabilities on the balance sheet for certain leases classified as operating leases under previous GAAP. The recognition, measurement, and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous GAAP. This updated guidance is effective for annual and interim periods beginning after December 15, 2018. Early adoption is permitted. Although the Company is currently evaluating the impact this new guidance will have on its consolidated financial statements and related disclosures, the Company expects that most of its operating lease commitments will be subject to the new standard and will be recognized as operating lease liabilities and right-of-use assets upon adoption. In January 2016, the FASB issued an updated guidance on Recognition and Measurement of Financial Assets and Financial Liabilities. The amendments in this updated guidance, among other things, 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. It requires entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. Further, it requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (i.e., securities or loans and receivables). It also eliminates the requirement for 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. The amendments in this updated guidance are effective for annual and interim periods beginning after December 15, 2017. Early adoption is not permitted. The adoption of this updated guidance is not expected to have a material effect on the Company’s consolidated financial statements and related disclosures. In July 2015, the FASB issued guidance to simplify the measurement of inventory. The updated standard more closely aligns the measurement of inventory with that of International Financial Reporting Standards and amends the measurement standard from lower of cost or market to lower of cost or net realizable value. The new guidance is effective for fiscal years beginning after December 15, 2016, including interim periods during the annual period and requires a prospective approach to adoption. Early adoption is permitted. The Company does not expect that this guidance will have a material impact on its consolidated financial statements. In May 2014, the FASB issued a new guidance on the recognition of revenue from contracts with customers, which includes a single set of rules and criteria for revenue recognition to be used across all industries. This new guidance, as amended is effective for annual reporting periods beginning after December 15, 2017, including interim periods during the annual period. Early adoption is allowed for annual reporting periods beginning after December 15, 2016. This new guidance may be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as of the date of adoption. The Company intends to adopt this standard using the modified retrospective method and is currently evaluating the impact of the adoption of this guidance on its consolidated financial statements. Based on a preliminary assessment, the Company does not expect the adoption of this new guidance to have a material impact on the Company’s consolidated financial statements. As the Company continues its assessment of the impact of the new guidance on its various arrangements with customers, it may identify additional areas of impact as well as revise the results of the preliminary assessment.

Organization and Significant 23

Organization and Significant Accounting Policies (Tables)	12 Months Ended
Organization and Significant Accounting Policies (Tables)	Dec. 31, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Schedule of Property and Equipment Estimated Useful Lives	Estimated Software, design tools, computer and other equipment 1 to 5 years Test equipment and mask costs 1 to 5 years Furniture and office equipment 1 to 5 years
Percentage of Gross Accounts Receivable	Summarized below are individual customers whose accounts receivable balances were 10% or higher of the consolidated gross receivable: As of December 31, 2016 2015 Percentage of gross accounts receivable Customer A 15% 16% Customer B * 20% Customer C 12% * Customer D 11% * Customer E 11% * * Represents less than 10% of the gross accounts receivable for the respective period end.
Summarized Percentage of Gross Revenue	Summarized below are individual OEM customers whose revenue balances were 10% or higher of the consolidated net revenue: Year Ended December 31, 2016 2015 2014 Percentage of revenue by customer Customer B 12.0% 12.5% 16.6% Customer F 13.1% 18.4% 15.4% Customer G * 12.0% 12.4% * Represents less than 10% of the net revenue for the respective year ended

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
Business Combinations (Tables)	Dec. 31, 2016
Business Combinations [Abstract]
Summary of Total Acquisition Consideration	The f ollowing table summarizes the total acquisition consideration (in thousands, except shares and per share data): Cash consideration to QLogic common stockholders $ 936,961 Common stock (8,364,018 shares of the Company's common stock at $51.55 per share) 431,165 Cash consideration for vested "in the money" stock options and fractional shares 1,934 Fair value of replacement equity awards attributable to pre-acquisition service 9,433 Total acquisition consideration $ 1,379,493
Purchase Price Allocation	The Company recorded QLogic’s tangible and intangible assets and liabilities based on their estimated fair values as of the acquisition date and allocated the remaining acquisition consideration to goodwill. The allocation is as follows: Amounts Previously Recognized as of Acquisition Date (Provisional) (1) Measurement Period Adjustments Amounts Recognized as of Acquisition Date (Provisional as Adjusted) (amounts in thousands) Cash and cash equivalents $ 365,065 $ - $ 365,065 Marketable securities 375 375 Accounts receivable 65,576 65,576 Inventories 62,500 800 (2) 63,300 Prepaid expense and other current assets 8,274 8,274 Property and equipment 87,314 (5,424 ) (3) 81,890 Intangible assets 716,700 5,000 (4) 721,700 Other assets 1,559 1,559 Goodwill 247,543 (77,954 ) 169,589 Accounts payable (41,776 ) (41,776 ) Accrued expense and other current liabilities (21,288 ) (596 ) (5) (21,884 ) Deferred revenue (603 ) (603 ) Deferred tax liability (95,766 ) 78,529 (5) (17,237 ) Other non-current liabilities (15,980 ) (355 ) (5) (16,335 ) Total acquisition consideration $ 1,379,493 $ - $ 1,379,493 (1) As reported in the Company’s September 30, 2016 Quarterly Report on Form 10-Q. (2) The Company obtained new information regarding the valuation of inventories as of the acquisition date which led to an increase in fair value of inventories, and a corresponding decrease in goodwill. (3) The Company obtained new information regarding the valuation of property and equipment as of the acquisition date which led to a net decrease in the fair value of property and equipment, and a corresponding increase in goodwill. This measurement adjustment was mainly related to the acquired real property which was classified as held for sale asset as of September 30, 2016. (4) The Company obtained new information regarding the valuation of intangible assets as of the acquisition date which led to a net increase in the fair value of intangible assets, and a corresponding decrease in goodwill. (5) The changes to the deferred tax liability, accrued expenses and other current and non-current liabilities pertains to tax related purchase price allocation adjustments. The Company obtained additional information related to its deferred income taxes which led to a decrease in the net deferred tax liability, and a corresponding decrease in goodwill. See detailed discussion below.
Valuation of Identifiable Intangible Assets and Estimated Useful Lives	The valuation of identifiable intangible assets and their estimated useful lives are as follows: Preliminary Estimated Asset Fair Value Weighted Average Useful Life (Years) (in thousands, except for useful life) Existing and core technology $ 578,400 6 In process research and development ("IPR&D") 78,900 n/a Customer relationships 51,100 10 Tradename and trademark 13,300 5 $ 721,700
Supplemental Pro forma Financial Information	The supplemental pro forma financial information for the periods presented is as follows: Year Ended December 31, 2016 2015 (in thousands, except per share data) Pro forma net revenue $ 881,498 885,276 Pro forma net loss (131,849 ) (167,626 ) Pro forma net loss per share, basic $ (1.99 ) $ (2.62 ) Pro forma net loss per share, diluted (1.99 ) (2.62 )

Net Loss Per Common Share (Tabl

Net Loss Per Common Share (Tables)	12 Months Ended
Net Loss Per Common Share (Tables)	Dec. 31, 2016
Earnings Per Share [Abstract]
Summary of Outstanding Options and Restricted Stock Units Excluded from Computation of Diluted Net Loss Per Common Share	The following outstanding options and restricted stock units were excluded from the computation of diluted net loss per common share for the periods presented because including them would have had an anti-dilutive effect: Year Ended December 31, 2016 2015 2014 (in thousands) Options to purchase common stock 1,194 2,028 2,626 Restricted stock units 4,119 2,194 2,465

Balance Sheet Components (Table

Balance Sheet Components (Tables)	12 Months Ended
Balance Sheet Components (Tables)	Dec. 31, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Inventories	Inventories As of December 31, 2016 2015 (in thousands) Work-in-process $ 61,363 $ 33,701 Finished goods 58,329 13,308 $ 119,692 $ 47,009
Property and Equipment, Net	Property and equipment, net As of December 31, 2016 2015 (in thousands) Test equipment and mask costs $ 138,633 $ 71,021 Software, design tools, computer and other equipment 87,648 62,331 Furniture, office equipment and leasehold improvements 12,927 5,755 Construction in progress 4,767 - 243,975 139,107 Less: accumulated depreciation and amortization (93,113 ) (74,430 ) $ 150,862 $ 64,677
Accrued Expenses And Other Current Liabilities	Accrued expenses and other current liabilities As of December 31, 2016 2015 (in thousands) Accrued compensation and related benefits $ 18,197 $ 4,485 Deferred research and development costs 25,370 - Income tax payable 4,098 541 Restructuring related payables (Note 7) 3,653 - Professional fees 2,233 1,018 Accrued rebates 3,228 - Manufacturing rights payable (Note 13) 2,500 1,875 Accrued interest 1,427 - Other 4,261 1,524 $ 64,967 $ 9,443
Warranty Accrual	The following table presents a rollforward of the warranty liability, which is included within accrued expenses and other current liabilities: Year Ended December 31, 2016 2015 2014 (in thousands) Beginning balance $ 336 $ 227 $ 167 Assumed warranty liability from the acquisition of QLogic 753 - - Accruals and adjustments 534 459 679 Settlements (702 ) (350 ) (619 ) Ending balance $ 921 $ 336 $ 227
Deferred Revenue	Deferred revenue As of December 31, 2016 2015 (in thousands) Services/support and maintenance $ 7,773 $ 5,531 Software license/subscription 625 785 Distributor deferred margin 14 - $ 8,412 $ 6,316
Other Noncurrent Liabilities	Other non-current liabilities As of December 31, 2016 2015 (in thousands) Income tax payable (Note 9) $ 12,071 $ 915 Accrued rent 2,163 1,493 Customer deposits 1,103 109 Restructuring related payables (Note 7) 663 - Other 2,386 445 $ 18,386 $ 2,962

Goodwill and Intangible Asset27

Goodwill and Intangible Assets, Net (Tables)	12 Months Ended
Goodwill and Intangible Assets, Net (Tables)	Dec. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets, Net	Intangible assets, net As of December 31, 2016 Gross Accumulated Amortization Net Weighted average remaining amortization period (years) (in thousands) Existing and core technology - product $ 620,110 $ (78,017 ) $ 542,093 5.63 Technology licenses 130,676 (48,225 ) 82,451 4.68 Customer contracts and relationships 53,315 (4,161 ) 49,154 9.62 Trade name 15,596 (3,309 ) 12,287 4.63 Total amortizable intangible assets $ 819,697 $ (133,712 ) $ 685,985 5.18 IPR&D 78,900 - 78,900 Total intangible assets $ 898,597 $ (133,712 ) $ 764,885 As of December 31, 2015 Gross Accumulated Amortization Net Weighted average remaining amortization period (years) (in thousands) Existing and core technology - product $ 41,711 $ (41,115 ) $ 596 0.99 Technology licenses 70,521 (35,625 ) 34,896 6.10 Customer contracts and relationships 2,215 (2,215 ) - - Trade name 2,296 (2,296 ) - - Total amortizable intangible assets $ 116,743 $ (81,251 ) $ 35,492 6.01
Estimated Future Amortization Expense From Amortizable Intangible Assets	The following table presents the estimated future amortization expense of amortizable intangible assets as of December 31, 2016 (in thousands): 2017 $ 125,146 2018 123,521 2019 121,030 2020 116,983 2021 109,635 2022 and thereafter 89,670 $ 685,985

Restructuring Accrual (Tables)

Restructuring Accrual (Tables)	12 Months Ended
Restructuring Accrual (Tables)	Dec. 31, 2016
Restructuring And Related Activities [Abstract]
Summary of Activity and Outstanding Balances of Restructuring Liability	The following table summarizes the activity and the outstanding balances of the restructuring liability as of and for the year ended December 31, 2016: As of December 31, 2016 Severance and other benefits Excess Facility Related Cost Total (in thousands) Balance at beginning of the year $ - $ - $ - Assumed restructuring liability from the acquisition of QLogic - 4,215 4,215 Additions 12,018 - 12,018 Cash payments (10,857 ) (1,060 ) (11,917 ) Balance at end of the year $ 1,161 $ 3,155 $ 4,316 Current portion of the restructuring related liabilities $ 1,161 $ 2,492 $ 3,653 Long-term portion of restructuring related liabilities $ - $ 663 $ 663

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
Stockholders' Equity (Tables)	Dec. 31, 2016
Stockholders Equity Note [Abstract]
Summary of Stock Options Activity	Detail related to stock option activity is as follows: Number of Options Outstanding Weighted Average Exercise Price Balance as of December 31, 2013 3,552,216 $ 17.79 Options granted 165,000 38.78 Options exercised (1,082,914 ) 14.05 Options cancelled and forfeited (8,042 ) 28.46 Balance as of December 31, 2014 2,626,260 20.62 Options granted 87,178 64.70 Options exercised (685,439 ) 14.02 Options cancelled and forfeited - - Balance as of December 31, 2015 2,027,999 24.75 Options granted 175,776 48.88 Assumed from the acquisition 1,045 34.63 Options exercised (1,010,670 ) 11.31 Options cancelled and forfeited (161 ) 32.40 Balance as of December 31, 2016 1,193,989 39.68
Summary Of Stock Options Outstanding	The following table summarizes information about stock options outstanding as of December 31, 2016: Outstanding Options Exercisable Options Exercise Prices Number of Shares Weighted Average Remaining Contractual Term Weighted Average Exercise Price Number of shares Weighted Average Exercise Price Aggregate Intrinsic Value $8.52 - $33.44 149,523 1.31 $ 25.53 149,523 $ 25.53 $35.73 - $36.54 180,529 2.16 35.73 180,373 35.73 $37.22 - $37.55 205,688 1.19 37.22 205,688 37.22 $37.63 - $37.63 204,293 3.22 37.63 190,893 37.63 $37.83 - $42.01 178,953 3.54 38.71 136,075 38.98 $43.62 - $76.38 275,003 5.75 53.98 58,617 63.11 $8.52 - $76.38 1,193,989 3.10 $ 39.68 921,169 $ 37.02 $ 27,368,172 Exercisable 921,169 2.39 $ 37.02 $ 23,593,675 Vested and expected to vest 1,172,678 3.05 $ 39.50 $ 27,101,509
Assumptions Of Fair Value Of Employee Option Grant Using Black-Scholes Option - Pricing Model	The fair value of each option grant for the years ended December 31, 2016, 2015 and 2014 were estimated on the date of grant using the Black-Scholes option-pricing model using the assumptions below. Year Ended December 31, 2016 2015 2014 Risk-free interest rate 1.11% 1.34% to 1.41% 1.26% to 1.47% Expected life 4.96 years 3.77 to 4.58 years 3.77 to 4.53 years Dividend yield 0% 0% 0% Volatility 42.51% 40.96% to 43.03% 43.8% to 45.1%
Summary of Activity of RSU	A summary of the activity of RSU for the related periods are presented below: Number of Shares Weighted- Average Grant Date Fair Value Per Share Balance as of December 31, 2013 1,776,170 $ 35.64 Granted 1,970,094 41.32 Issued and released (1,154,123 ) 37.55 Cancelled and forfeited (127,394 ) 37.05 Balance as of December 31, 2014 2,464,747 39.21 Granted 955,592 61.82 Issued and released (1,115,525 ) 40.94 Cancelled and forfeited (110,746 ) 45.82 Balance as of December 31, 2015 2,194,068 47.85 Granted 2,482,048 53.22 Assumed from the acquisition 1,301,199 51.55 Vested (1,583,775 ) 47.60 Cancelled and forfeited (274,221 ) 53.37 Balance as of December 31, 2016 4,119,319 51.98
Detail of Stock-Based Compensation Expense	The following table presents the detail of stock-based compensation expense amounts included in the consolidated statements of operations for each of the periods presented: Year Ended December 31, 2016 2015 2014 (in thousands) Cost of revenue $ 1,389 $ 765 $ 954 Research and development 41,701 29,085 32,328 Sales, general and administrative 42,240 18,447 19,177 $ 85,330 $ 48,297 $ 52,459

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Provision for (Benefit from) Income Taxes and Effective Tax Rates	The following table presents the provision for income taxes and the effective tax rates: Year Ended December 31, 2016 2015 2014 (in thousands) Loss before income taxes $ (146,212 ) $ (15,378 ) $ (24,182 ) Provision for income taxes 997 1,682 1,633 Effective tax rate (0.7 )% (10.9 )% (6.8 )%
Components of Domestic and Foreign Income (Loss) Before Income Tax Expense	The domestic and foreign components of income (loss) before income tax expense were as follows: Year Ended December 31, 2016 2015 2014 (in thousands) Domestic $ (147,752 ) $ (37,109 ) $ (42,318 ) Foreign 1,540 21,731 18,136 $ (146,212 ) $ (15,378 ) $ (24,182 )
Schedule of Provision for Income Tax Expense	The provision for income taxes consists of the following: Year Ended December 31, 2016 2015 2014 (in thousands) Current tax provision (benefit) Domestic $ 51 $ (15 ) $ 19 Foreign 3,084 1,034 1,230 3,135 1,019 1,249 Deferred tax provision (benefit) Domestic 775 564 627 Foreign (2,913 ) 99 (243 ) (2,138 ) 663 384 Provision for income taxes $ 997 $ 1,682 $ 1,633
Schedule of Effective Tax Rate Differs from United States Federal Statutory Rate	The Company’s effective tax rate differs from the United States federal statutory rate as follows: Year Ended December 31, 2016 2015 2014 Income tax at statutory rate 35.0 % 35.0 % 35.0 % Stock compensation costs (2.9 ) (13.1 ) 5.6 Other (1.8 ) (0.1 ) 0.6 Convertible securities - - (4.2 ) State taxes, net of federal benefit (0.1 ) (0.1 ) (0.4 ) Foreign income inclusion in the United States 6.8 (4.9 ) (0.5 ) Research and development credits 4.1 42.6 24.2 Foreign tax rate differential (32.1 ) 41.5 19.6 Change in valuation allowance (9.7 ) (111.8 ) (86.7 ) Total (0.7 )% (10.9 )% (6.8 )%
Schedule of Deferred Tax Assets and Liabilities	The tax effects of the temporary differences that give rise to deferred tax assets and liabilities are as follows: As of December 31, 2016 2015 (in thousands) Deferred tax assets: Tax credits $ 77,569 $ 47,113 Net operating loss carryforwards 257,286 40,325 Capitalized research and development 15,077 18,093 Intangible assets - 6,374 Depreciation and amortization 389 1,970 Stock compensation 14,372 10,813 Other 9,887 2,845 Gross deferred tax assets 374,580 127,533 Less: valuation allowance (315,915 ) (127,328 ) Net deferred tax assets 58,665 205 Deferred tax liabilities: Intangible assets (55,788 ) (3,400 ) Unremitted foreign earnings (21,171 ) - Net deferred tax liabilities $ (18,294 ) $ (3,195 ) Reported As Deferred tax assets, non-current $ 480 $ 222 Deferred tax liabilities, non-current (18,774 ) (3,417 ) Net deferred tax liabilities $ (18,294 ) $ (3,195 )
Summary of Activity Related to Unrecognized Tax Benefits	The following table summarizes the activity related to the unrecognized tax benefits: Year Ended December 31, 2016 2015 2014 (in thousands) Balance at beginning of the year $ 19,709 $ 16,270 $ 14,625 Gross increases related to current year's tax positions 5,640 3,138 1,446 Gross increase resulting from the acquisition of QLogic 179,366 - - Gross increases (decreased) related to prior year's tax positions (383 ) 398 199 Releases related to prior year's tax positions (1,917 ) (97 ) - Balance at the end of the year $ 202,415 $ 19,709 $ 16,270
Tax Benefit from Preferential Tax Rate Differential	Beginning in 2011, the Company is operating under tax incentives in Singapore, which are effective through February 2020. The tax incentives are conditional upon the Company meeting certain employment, revenue, and investment thresholds. The Company realized benefits from the reduced tax rate for the periods presented as follows: Year Ended December 31, 2016 2015 2014 (in thousands) Provision for Singapore entity at statutory tax rate of 17% $ 973 $ 811 $ 719 Provision for Singapore entity in the consolidated statement of operations 363 310 303 Benefit from preferential tax rate differential $ 610 $ 501 $ 416 Impact of tax benefits per basic and diluted share $ 0.01 $ 0.01 $ 0.01

Debt (Tables)

Debt (Tables)	12 Months Ended
Debt (Tables)	Dec. 31, 2016
Debt Disclosure [Abstract]
Summary of Outstanding Borrowings from Term Facility	The following table summarizes the outstanding borrowings from the Term Facility as of December 31, 2016: Principal Outstanding Unamortized Deferre d Principal Outstanding, net of Unamortized Deferred Financing Costs Current Portion of Long-Term Debt Long- Term Debt (in thousands) Initial Term B Loan Facility $ 698,250 $ 18,971 $ 679,279 $ 3,865 $ 675,414

Segment and Geographic Inform32

Segment and Geographic Information (Tables)	12 Months Ended
Segment and Geographic Information (Tables)	Dec. 31, 2016
Segment Reporting [Abstract]
Net Revenue by Markets	The net revenue by markets for the periods indicated was as follows: Year Ended December 31, 2016 2015 2014 (in thousands) Enterprise, datacenter, and service provider markets $ 568,812 $ 377,809 $ 341,056 Broadband and consumer markets 34,502 34,935 31,922 $ 603,314 $ 412,744 $ 372,978
Net Revenues by Geographic Area	Net revenues by geographic area are as follows: Year Ended December 31, 2016 2015 2014 (in thousands) United States $ 196,727 $ 128,431 $ 111,997 China 139,957 100,980 93,045 Korea 54,367 28,578 28,665 Taiwan 39,839 34,533 29,229 Mexico 28,563 34,452 27,184 Finland 38,768 38,283 44,976 Singapore 20,982 3,767 2,421 Malaysia 16,482 11,728 9,059 Other countries 67,629 31,992 26,402 Total $ 603,314 $ 412,744 $ 372,978
Tangible Long Lived Assets	The following table sets forth tangible long lived assets, which consist of property and equipment, net by geographic regions: As of December 31, 2016 2015 (in thousands) United States $ 115,328 $ 52,547 All other countries 35,534 12,130 Total $ 150,862 $ 64,677

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
Commitments and Contingencies (Tables)	Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Minimum Commitments Under Non-Cancelable Operating and Capital Lease Agreements	Minimum commitments under non-cancelable operating and capital lease agreements as of December 31, 2016 are as follows: Capital lease and technology license obligations Operating leases Total (in thousands) 2017 $ 26,919 $ 15,887 $ 42,806 2018 18,124 15,487 33,611 2019 10,643 14,569 25,212 2020 - 14,153 14,153 2021 - 13,110 13,110 2022 thereafter - 20,011 20,011 $ 55,686 $ 93,217 $ 148,903 Less: Interest component (3.75% annual rate) 2,273 Present value of minimum lease payment 53,413 Current portion of the obligations $ 25,535 Long-term portion of obligations $ 27,878

Organization and Significant 34

Organization and Significant Accounting Policies (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Organization And Basis Of Presentation [Line Items]
Warranty period description	The Company’s products are generally subject to a one-year warranty period though certain products carry a warranty for up to three years.
Advertising expenses	$ 2.8	$ 2.5	$ 1.8
Minimum
Organization And Basis Of Presentation [Line Items]
Depreciation period	12 months
Warranty period	1 year
Maximum
Organization And Basis Of Presentation [Line Items]
Depreciation period	24 months
Warranty period	3 years
QLogic Corporation
Organization And Basis Of Presentation [Line Items]
Business combination completion date	Aug. 16, 2016

Organization and Significant 35

Organization and Significant Accounting Policies (Schedule of Property and Equipment Estimated Useful Lives) (Detail)	12 Months Ended
	Dec. 31, 2016
Minimum
Property Plant And Equipment [Line Items]
Property and equipment, Estimated Useful Lives, years	12 months
Maximum
Property Plant And Equipment [Line Items]
Property and equipment, Estimated Useful Lives, years	24 months
Software, Design Tools, Computer and Other Equipment \| Minimum
Property Plant And Equipment [Line Items]
Property and equipment, Estimated Useful Lives, years	1 year
Software, Design Tools, Computer and Other Equipment \| Maximum
Property Plant And Equipment [Line Items]
Property and equipment, Estimated Useful Lives, years	5 years
Test Equipment and Mask Costs \| Minimum
Property Plant And Equipment [Line Items]
Property and equipment, Estimated Useful Lives, years	1 year
Test Equipment and Mask Costs \| Maximum
Property Plant And Equipment [Line Items]
Property and equipment, Estimated Useful Lives, years	5 years
Furniture and Office Equipment \| Minimum
Property Plant And Equipment [Line Items]
Property and equipment, Estimated Useful Lives, years	1 year
Furniture and Office Equipment \| Maximum
Property Plant And Equipment [Line Items]
Property and equipment, Estimated Useful Lives, years	5 years

Organization and Significant 36

Organization and Significant Accounting Policies (Percentage of Gross Accounts Receivable) (Detail) - Accounts Receivable - Customer Concentration Risk	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Customer A
Accounts Receivable [Line Items]
Percentage of gross accounts receivable	15.00%	16.00%
Customer B
Accounts Receivable [Line Items]
Percentage of gross accounts receivable		20.00%
Customer C
Accounts Receivable [Line Items]
Percentage of gross accounts receivable	12.00%
Customer D
Accounts Receivable [Line Items]
Percentage of gross accounts receivable	11.00%
Customer E
Accounts Receivable [Line Items]
Percentage of gross accounts receivable	11.00%

Organization and Significant 37

Organization and Significant Accounting Policies (Summarized Percentage of Gross Revenue) (Detail) - Sales Revenue, Net - Customer Concentration Risk	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Customer B
Concentration Risk [Line Items]
Percentage of total net revenue	12.00%	12.50%	16.60%
Customer F
Concentration Risk [Line Items]
Percentage of total net revenue	13.10%	18.40%	15.40%
Customer G
Concentration Risk [Line Items]
Percentage of total net revenue		12.00%	12.40%

Business Combinations (Narrativ

Business Combinations (Narrative) (Detail) $ / shares in Units, $ in Thousands

Aug. 16, 2016USD ($)Project$ / shares

Apr. 29, 2015USD ($)

Mar. 31, 2015USD ($)

Dec. 31, 2016USD ($)

Sep. 30, 2016USD ($)

Dec. 31, 2016USD ($)

Dec. 31, 2015USD ($)

Dec. 31, 2014USD ($)

Dec. 31, 2013USD ($)

Jan. 31, 2014USD ($)

Mar. 31, 2015USD ($)

Oct. 08, 2014USD ($)

Business Acquisition [Line Items]

Tax benefit recognized from partial release of net deferred tax assets valuation allowance

$ 82,900

Change in estimated fair value of notes payable and other

$ 14,888

Settlement to common shareholders of an acquired entity

$ 573,830

$ 3,630

QLogic Corporation

Business Acquisition [Line Items]

Business combination agreement date

Jun. 15,
2016

Business acquisition consideration paid pursuant to exchange offer per share in cash | $ / shares

$ 11

Business acquisition share conversion ratio pursuant to exchange offer

0.098

Tax benefit recognized from partial release of net deferred tax assets valuation allowance

$ 82,900

Adjustment to goodwill

$ 78,500

Estimated remaining costs to complete IPR&D projects

$ 112,200

Number of IPR&D projects acquired | Project

QLogic Corporation | Consolidated Net Revenue | Product Concentration Risk

Business Acquisition [Line Items]

Concentration risk, percentage

26.00%

QLogic Corporation | Fair Value Adjustment to Inventory

Business Acquisition [Line Items]

Fair value adjustment to acquisition-date inventory recognized in cost of sales

23,300

QLogic Corporation | Acquisition-Related Costs

Business Acquisition [Line Items]

Transaction costs

40,900

QLogic Corporation | Selling, General and Administrative Expense

Business Acquisition [Line Items]

Acquisition related costs

$ 16,600

QLogic Corporation | Fibre Channel Products

Business Acquisition [Line Items]

IPR&D projects estimated to be completed, fiscal year

2,019

QLogic Corporation | Ethernet Products

Business Acquisition [Line Items]

IPR&D projects estimated to be completed, fiscal year

2,017

QLogic Corporation | Minimum | IPR&D

Business Acquisition [Line Items]

Estimated useful life (years) upon completion of IPR&D projects

5 years

QLogic Corporation | Maximum | IPR&D

Business Acquisition [Line Items]

Estimated useful life (years) upon completion of IPR&D projects

6 years

Xpliant, Inc

Business Acquisition [Line Items]

Cash advances in exchange for notes

$ 85,800

Change in estimated fair value of notes payable and other

$ 14,900

Xpliant, Inc | Nine Convertible Notes Receivable

Business Acquisition [Line Items]

Cash advances in exchange for notes

10,000

Convertible notes receivable maturity date

Aug. 31,
2014

Interest rate on notes receivable

6.00%

Xpliant, Inc | Promissory Notes

Business Acquisition [Line Items]

Cash advances in exchange for notes

$ 75,800

Promissory note, cancellation date

Jul. 31,
2015

Xpliant, Inc | Several Convertible Note Receivable | Non-controlling Interest

Business Acquisition [Line Items]

Convertible notes receivable maturity date

Aug. 31,
2014

Interest rate on notes receivable

6.00%

Cash advances in exchange for notes

$ 13,000

Notes payable and other

$ 2,900

Convertible note to third party investor paid by Variable Interest Entity

$ 1,000

Xpliant, Inc | Minimum | Promissory Notes

Business Acquisition [Line Items]

Promissory note, maturity date

Apr. 30,
2015

Xpliant, Inc | Maximum | Promissory Notes

Business Acquisition [Line Items]

Promissory note, maturity date

Mar. 31,
2016

Xpliant

Business Acquisition [Line Items]

Business combination agreement date

Jul. 30,
2014

Cash consideration to settle the non-controlling interest convertible notes and convertible security holder

$ 30,800

Settlement to common shareholders of an acquired entity

$ 1,100

$ 2,500

$ 3,600

Original transaction agreement amended date

Oct. 8,
2014

Original transaction agreement second amended date

Mar. 31,
2015

Percentage of outstanding securities settled in amendment agreement

30.00%

70.00%

Business Combinations (Summary

Business Combinations (Summary of Total Acquisition Consideration) (Detail) - QLogic Corporation $ in Thousands	Aug. 16, 2016USD ($)
Business Acquisition [Line Items]
Cash consideration to QLogic common stockholders	$ 936,961
Common stock (8,364,018 shares of the Company's common stock at $51.55 per share)	431,165
Cash consideration for vested "in the money" stock options and fractional shares	1,934
Fair value of replacement equity awards attributable to pre-acquisition service	9,433
Total acquisition consideration	$ 1,379,493

Business Combinations (Summar40

Business Combinations (Summary of Total Acquisition Consideration) (Parenthetical) (Detail) - QLogic Corporation	Aug. 16, 2016$ / sharesshares
Business Acquisition [Line Items]
Business acquisition number of shares issued \| shares	8,364,018
Business acquisition share price \| $ / shares	$ 51.55

Business Combinations (Purchase

Business Combinations (Purchase Price Allocation) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Nov. 30, 2016	Aug. 16, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Property and equipment		$ 9,200
Goodwill	$ 241,067			$ 71,478
QLogic Corporation
Business Acquisition [Line Items]
Cash and cash equivalents			$ 365,065
Marketable securities			375
Accounts receivable			65,576
Inventories			63,300
Prepaid expense and other current assets			8,274
Property and equipment			81,890
Intangible assets			721,700
Other assets			1,559
Goodwill			169,589
Accounts payable			(41,776)
Accrued expense and other current liabilities			(21,884)
Deferred revenue			(603)
Deferred tax liability			(17,237)
Other non-current liabilities			(16,335)
Total acquisition consideration			1,379,493
QLogic Corporation \| Amounts Previously Recognized as of Acquisition Date (Provisional)
Business Acquisition [Line Items]
Cash and cash equivalents			365,065
Marketable securities			375
Accounts receivable			65,576
Inventories			62,500
Prepaid expense and other current assets			8,274
Property and equipment			87,314
Intangible assets			716,700
Other assets			1,559
Goodwill			247,543
Accounts payable			(41,776)
Accrued expense and other current liabilities			(21,288)
Deferred revenue			(603)
Deferred tax liability			(95,766)
Other non-current liabilities			(15,980)
Total acquisition consideration			1,379,493
QLogic Corporation \| Measurement Period Adjustments
Business Acquisition [Line Items]
Inventories			800
Property and equipment			(5,424)
Intangible assets			5,000
Goodwill			(77,954)
Accrued expense and other current liabilities			(596)
Deferred tax liability			78,529
Other non-current liabilities			$ (355)

Business Combinations (Valuatio

Business Combinations (Valuation of Identifiable Intangible Assets and Estimated Useful Lives) (Detail) - USD ($) $ in Thousands	Aug. 16, 2016	Nov. 30, 2016
In Process Research and Development ("IPR&D")
Finite And Indefinite Lived Intangible Assets Acquired Through Business Combination [Line Items]
Preliminary Estimated Asset Fair Value		$ 2,000
QLogic Corporation
Finite And Indefinite Lived Intangible Assets Acquired Through Business Combination [Line Items]
Preliminary Estimated Asset Fair Value	$ 721,700
QLogic Corporation \| Existing and Core Technology
Finite And Indefinite Lived Intangible Assets Acquired Through Business Combination [Line Items]
Preliminary Estimated Asset Fair Value	$ 578,400
Weighted Average Useful Life (Years)	6 years
QLogic Corporation \| Customer Relationships
Finite And Indefinite Lived Intangible Assets Acquired Through Business Combination [Line Items]
Preliminary Estimated Asset Fair Value	$ 51,100
Weighted Average Useful Life (Years)	10 years
QLogic Corporation \| Tradename and Trademark
Finite And Indefinite Lived Intangible Assets Acquired Through Business Combination [Line Items]
Preliminary Estimated Asset Fair Value	$ 13,300
Weighted Average Useful Life (Years)	5 years
QLogic Corporation \| In Process Research and Development ("IPR&D")
Finite And Indefinite Lived Intangible Assets Acquired Through Business Combination [Line Items]
Preliminary Estimated Asset Fair Value	$ 78,900

Business Combinations (Suppleme

Business Combinations (Supplemental Pro forma Financial Information) (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition Pro Forma Information [Abstract]
Pro forma net revenue	$ 881,498	$ 885,276
Pro forma net loss	$ (131,849)	$ (167,626)
Pro forma net loss per share, basic	$ (1.99)	$ (2.62)
Pro forma net loss per share, diluted	$ (1.99)	$ (2.62)

Net Loss Per Common Share (Summ

Net Loss Per Common Share (Summary of Outstanding Options and Restricted Stock Units Excluded from Computation of Diluted Net Loss Per Common Share) (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Options To Purchase Common Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation of diluted net income (loss) per common share	1,194	2,028	2,626
Restricted Stock Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation of diluted net income (loss) per common share	4,119	2,194	2,465

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Money Market Funds \| Fair Value, Inputs, Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	$ 61.4	$ 102.2

Balance Sheet Components (Inven

Balance Sheet Components (Inventories) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Inventory Net [Abstract]
Work-in-process	$ 61,363	$ 33,701
Finished goods	58,329	13,308
Inventories	$ 119,692	$ 47,009

Balance Sheet Components (Prope

Balance Sheet Components (Property and Equipment, Net) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 243,975	$ 139,107
Less: accumulated depreciation and amortization	(93,113)	(74,430)
Property and equipment, net	150,862	64,677
Test Equipment and Mask Costs
Property Plant And Equipment [Line Items]
Property and equipment, gross	138,633	71,021
Software, Design Tools, Computer and Other Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	87,648	62,331
Furniture, Office Equipment and Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	12,927	$ 5,755
Construction in Progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 4,767

Balance Sheet Components (Narra

Balance Sheet Components (Narrative) (Detail) - USD ($) $ in Thousands	Dec. 16, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Nov. 30, 2016
Property Plant And Equipment [Line Items]
Depreciation and amortization expense		$ 46,700	$ 32,900	$ 19,500
Proceeds received from sale of held for sale assets	$ 32,400
Off-market rental rate adjustment	$ 1,800
Asset purchase agreement, property and equipment acquired					$ 9,200
Accrued rebates		3,228
Accrued Rebates
Property Plant And Equipment [Line Items]
Rebates charged as a reduction to revenue		2,900
Accrued rebates		3,200
Outstanding rebate accrual		2,100
Rebate settlements		1,800
In Process Research and Development ("IPR&D")
Property Plant And Equipment [Line Items]
Asset purchase agreement, IPR&D acquired					$ 2,000
Property and Equipment Under Financing Arrangements
Property Plant And Equipment [Line Items]
Leases under financing arrangements		46,300	25,300
Property and Equipment Under Capital Lease and Certain Financing Arrangements
Property Plant And Equipment [Line Items]
Amortization expense related to assets under capital lease and certain financing arrangements		$ 16,800	$ 14,700	$ 9,500

Balance Sheet Components (Accru

Balance Sheet Components (Accrued Expenses and Other Current Liabilities) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Accrued compensation and related benefits	$ 18,197	$ 4,485
Deferred research and development costs	25,370
Income tax payable	4,098	541
Restructuring related payables (Note 7)	3,653
Professional fees	2,233	1,018
Accrued rebates	3,228
Manufacturing rights payable (Note 13)	2,500	1,875
Accrued interest	1,427
Other	4,261	1,524
Accrued expenses and other current liabilities	$ 64,967	$ 9,443

Balance Sheet Components (Warra

Balance Sheet Components (Warranty Accrual) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Product Warranty Accrual, Balance Sheet Classification [Abstract]
Beginning balance	$ 336	$ 227	$ 167
Assumed warranty liability from the acquisition of QLogic	753
Accruals and adjustments	534	459	679
Settlements	(702)	(350)	(619)
Ending balance	$ 921	$ 336	$ 227

Balance Sheet Components (Defer

Balance Sheet Components (Deferred Revenue) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 8,412	$ 6,316
Service / Support and Maintenance
Deferred Revenue Arrangement [Line Items]
Deferred revenue	7,773	5,531
Software License / Subscription
Deferred Revenue Arrangement [Line Items]
Deferred revenue	625	$ 785
Distributor Deferred Margin
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 14

Balance Sheet Components (Other

Balance Sheet Components (Other Non-Current Liabilities) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounts Payable And Accrued Liabilities Current And Noncurrent [Abstract]
Income tax payable (Note 9)	$ 12,071	$ 915
Accrued rent	2,163	1,493
Customer deposits	1,103	109
Restructuring related payables (Note 7)	663
Other	2,386	445
Other non-current liabilities	$ 18,386	$ 2,962

Goodwill and Intangible Asset53

Goodwill and Intangible Assets, Net (Narrative) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 241,067	$ 71,478
Amortization expense	$ 52,600	$ 9,600	$ 14,600

Goodwill and Intangible Asset54

Goodwill and Intangible Assets, Net (Intangible Assets, Net) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Gross	$ 819,697	$ 116,743
Finite-lived intangible assets, Accumulated Amortization	(133,712)	(81,251)
Finite-lived intangible assets, Net	$ 685,985	$ 35,492
Weighted average remaining amortization period (years)	5 years 2 months 5 days	6 years 4 days
Intangible assets, Gross	$ 898,597
Intangible assets, Net	764,885	$ 35,492
IPR&D
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	78,900
Existing and core technology - product
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Gross	620,110	41,711
Finite-lived intangible assets, Accumulated Amortization	(78,017)	(41,115)
Finite-lived intangible assets, Net	$ 542,093	$ 596
Weighted average remaining amortization period (years)	5 years 7 months 17 days	11 months 27 days
Technology licenses
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Gross	$ 130,676	$ 70,521
Finite-lived intangible assets, Accumulated Amortization	(48,225)	(35,625)
Finite-lived intangible assets, Net	$ 82,451	$ 34,896
Weighted average remaining amortization period (years)	4 years 8 months 5 days	6 years 1 month 6 days
Customer contracts and relationships
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Gross	$ 53,315	$ 2,215
Finite-lived intangible assets, Accumulated Amortization	(4,161)	(2,215)
Finite-lived intangible assets, Net	$ 49,154
Weighted average remaining amortization period (years)	9 years 7 months 13 days
Trade name
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Gross	$ 15,596	2,296
Finite-lived intangible assets, Accumulated Amortization	(3,309)	$ (2,296)
Finite-lived intangible assets, Net	$ 12,287
Weighted average remaining amortization period (years)	4 years 7 months 17 days

Goodwill and Intangible Asset55

Goodwill and Intangible Assets, Net (Estimated Future Amortization Expense from Amortizable Intangible Assets) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
2,017	$ 125,146
2,018	123,521
2,019	121,030
2,020	116,983
2,021	109,635
2022 and thereafter	89,670
Finite-lived intangible assets, Net	$ 685,985	$ 35,492

Restructuring Accrual (Narrativ

Restructuring Accrual (Narrative) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2014
Restructuring Cost And Reserve [Line Items]
Additional restructuring accrual	$ 12,018
QLogic Corporation
Restructuring Cost And Reserve [Line Items]
Restructuring and related activities agreement term	2018-04
Severance And Other Benefits
Restructuring Cost And Reserve [Line Items]
Additional restructuring accrual	$ 12,018	$ 1,400

Restructuring Accrual (Summary

Restructuring Accrual (Summary of Activity and Outstanding Balances of Restructuring Liability) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2014
Restructuring Cost And Reserve [Line Items]
Additions	$ 12,018
Cash payments	(11,917)
Balance at end of the year	4,316
Current portion of the restructuring related liabilities	3,653
Long-term portion of restructuring related liabilities	663
Severance And Other Benefits
Restructuring Cost And Reserve [Line Items]
Additions	12,018	$ 1,400
Cash payments	(10,857)
Balance at end of the year	1,161
Current portion of the restructuring related liabilities	1,161
Excess Facility Related Cost
Restructuring Cost And Reserve [Line Items]
Cash payments	(1,060)
Balance at end of the year	3,155
Current portion of the restructuring related liabilities	2,492
Long-term portion of restructuring related liabilities	663
QLogic Corporation
Restructuring Cost And Reserve [Line Items]
Assumed restructuring liability from the acquisition of QLogic	4,215
QLogic Corporation \| Excess Facility Related Cost
Restructuring Cost And Reserve [Line Items]
Assumed restructuring liability from the acquisition of QLogic	$ 4,215

Stockholders Equity (Narrative)

Stockholders Equity (Narrative) (Detail) - USD ($) $ / shares in Units, $ in Millions	Jun. 15, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	May 31, 2007
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares authorized		200,000,000	200,000,000
Common stock, par value		$ 0.001	$ 0.001
Preferred stock, shares authorized		10,000,000	10,000,000
Preferred stock, par value		$ 0.001	$ 0.001
Common stock issued in connection with the vesting of RSUs			1,115,525	1,154,123
QLogic 2005 Plan \| QLogic Corporation
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for issuance	3,612,039	1,998,131
Share count multiplier	175.00%
2001 Stock Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common Stock, shares reserved for issuance		0
Stock incentive plan shares vesting six months after the date of grant		12.50%
Stock incentive plan shares vesting monthly after six months		2.08%
Stock incentive plan term of awards expiration period		10 years
2001 Stock Incentive Plan \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense vesting period (in years)		3 years 6 months
2001 Stock Incentive Plan \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense vesting period (in years)		4 years 6 months
2007 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock incentive plan shares vesting six months after the date of grant		12.50%
Stock incentive plan shares vesting monthly after six months		2.08%
Compensation expense vesting period (in years)		3 years 6 months
Shares reserved for issuance		8,863,022			5,000,000
2007 Equity Incentive Plan \| Restricted Stock Unit Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense vesting period (in years)		4 years
2007 Equity Incentive Plan \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock incentive plan term of awards expiration period		7 years
2007 Equity Incentive Plan \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock incentive plan term of awards expiration period		10 years
2016 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for issuance	3,600,000	3,418,573
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Aggregate intrinsic value		$ 41.5	$ 37.4	$ 36.2
Estimated weighted-average grant date fair value of options granted		$ 18.65	$ 23.79	$ 14.63
Unrecognized compensation cost, net of estimated forfeitures		$ 3.9
Unrecognized compensation cost expected to be recognized over weighted average period (in years)		2 years 6 months
Employee Stock Option \| QLogic 2005 Plan \| QLogic Corporation
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock incentive plan term of awards expiration period	10 years
Compensation expense vesting period (in years)	4 years
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost, net of estimated forfeitures		$ 164.8
Unrecognized compensation cost expected to be recognized over weighted average period (in years)		2 years 6 months 26 days
Common stock issued in connection with the vesting of RSUs		1,547,694
Total intrinsic value of the RSU's issued at period end		$ 256.9
Restricted Stock Units (RSUs) \| QLogic 2005 Plan \| QLogic Corporation
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense vesting period (in years)	4 years
Restricted Stock Units (RSUs) \| One-Year Performance Officers
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense vesting period (in years)		1 year	1 year
RSU's granted		$ 2.9	$ 2.1
Restricted Stock Units (RSUs) \| Two-Year Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense vesting period (in years)			2 years
RSU's granted			$ 0.7
Market-Performance Based RSU's
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of consecutive trading period		30 days
Market-Performance Based RSU's \| Four-Year Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense vesting period (in years)			4 years
RSU's granted			$ 1.5
Market-Performance Based RSU's \| Three-Year Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense vesting period (in years)		3 years
RSU's granted		$ 3.3

Stockholders Equity (Summary of

Stockholders Equity (Summary of Stock Option Activity) (Detail) - 2007 Equity Incentive Plan, 2016 Equity Incentive Plan and QLogic 2005 Plan - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options Outstanding, Beginning balance	2,027,999	2,626,260	3,552,216
Number of Options Outstanding, Options granted	175,776	87,178	165,000
Number of Options Outstanding, Assumed from the acquisition	1,045
Number of Options Outstanding, Options exercised	(1,010,670)	(685,439)	(1,082,914)
Number of Options Outstanding, Options cancelled and forfeited	(161)		(8,042)
Number of Options Outstanding, Ending balance	1,193,989	2,027,999	2,626,260
Weighted Average Exercise Price, Beginning balance	$ 24.75	$ 20.62	$ 17.79
Weighted Average Exercise Price, Options granted	48.88	64.70	38.78
Weighted Average Exercise Price, Assumed from the acquisition	34.63
Weighted Average Exercise Price, Options exercised	11.31	14.02	14.05
Weighted Average Exercise Price, Options cancelled and forfeited	32.40		28.46
Weighted Average Exercise Price, Ending balance	$ 39.68	$ 24.75	$ 20.62

Stockholders Equity (Summary 60

Stockholders Equity (Summary Of Stock Options Outstanding) (Detail)	12 Months Ended
	Dec. 31, 2016USD ($)$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercisable Options, Number of Shares \| shares	921,169
Exercisable Options, Weighted Average Exercise Price	$ 37.02
Exercisable, Weighted Average Remaining Contractual Term	2 years 4 months 21 days
Exercisable, Aggregate Intrinsic Value \| $	$ 23,593,675
Outstanding Options, Vested and expected to vest, Number of Shares \| shares	1,172,678
Outstanding Options, Vested and expected to vest, Weighted Average Remaining Contractual Term	3 years 18 days
Outstanding Options, Vested and expected to vest, Weighted Average Exercise price	$ 39.50
Vested and expected to vest, Aggregate Intrinsic Value \| $	$ 27,101,509
8.52 - 33.44
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Prices, lower range limit	$ 8.52
Exercise Prices, upper range limit	$ 33.44
Outstanding Options, Number of Shares \| shares	149,523
Outstanding Options, Weighted Average Remaining Contractual Term	1 year 3 months 22 days
Outstanding Options, Weighted Average Exercise Price	$ 25.53
Exercisable Options, Number of Shares \| shares	149,523
Exercisable Options, Weighted Average Exercise Price	$ 25.53
35.73 - 36.54
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Prices, lower range limit	35.73
Exercise Prices, upper range limit	$ 36.54
Outstanding Options, Number of Shares \| shares	180,529
Outstanding Options, Weighted Average Remaining Contractual Term	2 years 1 month 28 days
Outstanding Options, Weighted Average Exercise Price	$ 35.73
Exercisable Options, Number of Shares \| shares	180,373
Exercisable Options, Weighted Average Exercise Price	$ 35.73
37.22 - 37.55
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Prices, lower range limit	37.22
Exercise Prices, upper range limit	$ 37.55
Outstanding Options, Number of Shares \| shares	205,688
Outstanding Options, Weighted Average Remaining Contractual Term	1 year 2 months 9 days
Outstanding Options, Weighted Average Exercise Price	$ 37.22
Exercisable Options, Number of Shares \| shares	205,688
Exercisable Options, Weighted Average Exercise Price	$ 37.22
37.63 - 37.63
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Prices, lower range limit	37.63
Exercise Prices, upper range limit	$ 37.63
Outstanding Options, Number of Shares \| shares	204,293
Outstanding Options, Weighted Average Remaining Contractual Term	3 years 2 months 19 days
Outstanding Options, Weighted Average Exercise Price	$ 37.63
Exercisable Options, Number of Shares \| shares	190,893
Exercisable Options, Weighted Average Exercise Price	$ 37.63
37.83 - 42.01
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Prices, lower range limit	37.83
Exercise Prices, upper range limit	$ 42.01
Outstanding Options, Number of Shares \| shares	178,953
Outstanding Options, Weighted Average Remaining Contractual Term	3 years 6 months 15 days
Outstanding Options, Weighted Average Exercise Price	$ 38.71
Exercisable Options, Number of Shares \| shares	136,075
Exercisable Options, Weighted Average Exercise Price	$ 38.98
43.62 - 76.38
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Prices, lower range limit	43.62
Exercise Prices, upper range limit	$ 76.38
Outstanding Options, Number of Shares \| shares	275,003
Outstanding Options, Weighted Average Remaining Contractual Term	5 years 9 months
Outstanding Options, Weighted Average Exercise Price	$ 53.98
Exercisable Options, Number of Shares \| shares	58,617
Exercisable Options, Weighted Average Exercise Price	$ 63.11
8.52 - 76.38
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Prices, lower range limit	8.52
Exercise Prices, upper range limit	$ 76.38
Outstanding Options, Number of Shares \| shares	1,193,989
Outstanding Options, Weighted Average Remaining Contractual Term	3 years 1 month 6 days
Outstanding Options, Weighted Average Exercise Price	$ 39.68
Exercisable Options, Number of Shares \| shares	921,169
Exercisable Options, Weighted Average Exercise Price	$ 37.02
Aggregate Intrinsic Value \| $	$ 27,368,172

Stockholders Equity (Assumption

Stockholders Equity (Assumptions of Fair Value of Employee Option Grant Using Black-Scholes Option Pricing Model) (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate	1.11%
Expected life	4 years 11 months 16 days
Dividend yield	0.00%	0.00%	0.00%
Volatility	42.51%
Risk-free interest rate, minimum		1.34%	1.26%
Risk-free interest rate, maximum		1.41%	1.47%
Volatility, minimum		40.96%	43.80%
Volatility, maximum		43.03%	45.10%
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected life		3 years 9 months 7 days	3 years 9 months 7 days
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected life		4 years 6 months 29 days	4 years 6 months 11 days

Stockholders Equity (Summary 62

Stockholders Equity (Summary of Activity of RSU) (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Shares, Beginning balance	2,194,068	2,464,747	1,776,170
Number of Shares, Granted	2,482,048	955,592	1,970,094
Number of Shares, Issued and released		(1,115,525)	(1,154,123)
Number of Shares, Assumed from the acquisition	1,301,199
Number of Shares, Vested	(1,583,775)
Number of Shares, Cancelled and forfeited	(274,221)	(110,746)	(127,394)
Number of Shares, Ending balance	4,119,319	2,194,068	2,464,747
Weighted-Average Grant Date Fair Value Per Share, Beginning balance	$ 47.85	$ 39.21	$ 35.64
Weighted-Average Grant Date Fair Value Per Share, Granted	53.22	61.82	41.32
Weighted-Average Grant Date Fair Value Per Share, Assumed from the acquisition	51.55
Weighted-Average Grant Date Fair Value Per Share, Issued and released	47.60	40.94	37.55
Weighted-Average Grant Date Fair Value Per Share, Cancelled and forfeited	53.37	45.82	37.05
Weighted-Average Grant Date Fair Value Per Share, Ending balance	$ 51.98	$ 47.85	$ 39.21

Stockholders Equity (Detail of

Stockholders Equity (Detail of Stock-Based Compensation Expense) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 85,330	$ 48,297	$ 52,459
Cost of revenue
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	1,389	765	954
Research and development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	41,701	29,085	32,328
Sales, general and administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 42,240	$ 18,447	$ 19,177

Income Taxes (Provision for (Be

Income Taxes (Provision for (Benefit from) Income Taxes and Effective Tax Rates) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Loss before income taxes	$ (146,212)	$ (15,378)	$ (24,182)
Provision for income taxes (Note 9)	$ 997	$ 1,682	$ 1,633
Effective tax rate	(0.70%)	(10.90%)	(6.80%)

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Income Taxes (Narrative) (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Line Items]
Partial release of valuation allowance on deferred tax assets	$ 82.9
Stock-based compensation, stock option benefits recorded to equity		$ 101.7
Tax credit carryforwards, various miscellaneous		1.1
Undistributed earnings of foreign subsidiary		359.7	$ 38.3
Repatriated earnings from its offshore operations		50
Unrecognized tax benefit that would impact effective tax rate		12.1
Unrecognized tax benefits, Income tax penalties and interest accrued		$ 2.8
California Franchise Tax Board
Income Tax Disclosure [Line Items]
Tax year open to examination		2,000
Tax Year 2008
Income Tax Disclosure [Line Items]
Tax audit year		2,008
Tax Year 2016
Income Tax Disclosure [Line Items]
Tax audit year		2,015
Federal
Income Tax Disclosure [Line Items]
Net operating loss carryforwards		$ 1,408
Net operating loss carryforwards, expire year		Jan. 1, 2020
Tax credit carryforwards, research and development		$ 59.3
Tax credit carryforwards, expire year		Jan. 1, 2020
Federal \| Internal Revenue Service
Income Tax Disclosure [Line Items]
Tax year open to examination, start year		2,000
State
Income Tax Disclosure [Line Items]
Net operating loss carryforwards		$ 496.1
Net operating loss carryforwards, expire year		Jan. 1, 2017
Tax credit carryforwards, research and development		$ 75.9
Tax credit carryforwards, expire year		Jan. 1, 2017
Excess windfall deduction \| Federal
Income Tax Disclosure [Line Items]
Net operating loss carryforwards		$ 260.7
Excess windfall deduction \| State
Income Tax Disclosure [Line Items]
Net operating loss carryforwards		$ 143

Income Taxes (Components of Dom

Income Taxes (Components of Domestic and Foreign Income (Loss) Before Income Tax Expense) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Domestic	$ (147,752)	$ (37,109)	$ (42,318)
Foreign	1,540	21,731	18,136
Loss before income taxes	$ (146,212)	$ (15,378)	$ (24,182)

Income Taxes (Schedule of Provi

Income Taxes (Schedule of Provision for Income Tax Expense) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Current tax provision (benefit), Domestic	$ 51	$ (15)	$ 19
Current tax provision (benefit), Foreign	3,084	1,034	1,230
Current tax provision (benefit), total	3,135	1,019	1,249
Deferred tax provision (benefit), Domestic	775	564	627
Deferred tax provision (benefit), Foreign	(2,913)	99	(243)
Deferred tax provision (benefit), total	(2,138)	663	384
Provision for (benefit from) income taxes	$ 997	$ 1,682	$ 1,633

Income Taxes (Schedule of Effec

Income Taxes (Schedule of Effective Tax Rate Differs from United States Federal Statutory Rate) (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income tax at statutory rate	35.00%	35.00%	35.00%
Stock compensation costs	(2.90%)	(13.10%)	5.60%
Other	(1.80%)	(0.10%)	0.60%
Convertible securities			(4.20%)
State taxes, net of federal benefit	(0.10%)	(0.10%)	(0.40%)
Foreign income inclusion in the United States	6.80%	(4.90%)	(0.50%)
Research and development credits	4.10%	42.60%	24.20%
Foreign tax rate differential	(32.10%)	41.50%	19.60%
Change in valuation allowance	(9.70%)	(111.80%)	(86.70%)
Effective tax rate	(0.70%)	(10.90%)	(6.80%)

Income Taxes (Schedule of Defer

Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Deferred tax assets, Tax credits	$ 77,569	$ 47,113
Deferred tax assets, Net operating loss carryforwards	257,286	40,325
Deferred tax assets, Capitalized research and development	15,077	18,093
Deferred tax assets, Intangible assets		6,374
Deferred tax assets, Depreciation and amortization	389	1,970
Deferred tax assets, Stock compensation	14,372	10,813
Deferred tax assets, Other	9,887	2,845
Gross deferred tax assets	374,580	127,533
Less: valuation allowance	(315,915)	(127,328)
Net deferred tax assets	58,665	205
Deferred tax liabilities, Intangible assets	(55,788)	(3,400)
Deferred tax liabilities, Unremitted foreign earnings	(21,171)
Net deferred tax liabilities	(18,294)	(3,195)
Deferred tax assets, non-current	480	222
Deferred tax liabilities, non-current	$ (18,774)	$ (3,417)

Income Taxes (Summary of Activi

Income Taxes (Summary of Activity Related to Unrecognized Tax Benefits) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Contingency [Line Items]
Balance at beginning of the year	$ 19,709	$ 16,270	$ 14,625
Gross increases related to current year's tax positions	5,640	3,138	1,446
Gross increases (decreased) related to prior year's tax positions	(383)	398	199
Releases related to prior year's tax positions	(1,917)	(97)
Balance at the end of the year	202,415	$ 19,709	$ 16,270
QLogic Corporation
Income Tax Contingency [Line Items]
Gross increase resulting from the acquisition of QLogic	$ 179,366

Income Taxes (Benefits from the

Income Taxes (Benefits from the Reduced Tax Rate) (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Line Items]
Provision for Singapore entity in the consolidated statement of operations	$ 997	$ 1,682	$ 1,633
SINGAPORE
Income Tax Disclosure [Line Items]
Provision for Singapore entity at statutory tax rate of 17%	973	811	719
Provision for Singapore entity in the consolidated statement of operations	363	310	303
Benefit from preferential tax rate differential	$ 610	$ 501	$ 416
Impact of tax benefits per basic and diluted share	$ 0.01	$ 0.01	$ 0.01

Income Taxes (Benefits from t72

Income Taxes (Benefits from the Reduced Tax Rate (Parenthetical)) (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Line Items]
Income tax at statutory rate	35.00%	35.00%	35.00%
SINGAPORE
Income Tax Disclosure [Line Items]
Income tax at statutory rate	17.00%

Retirement Plan (Narrative) (De

Retirement Plan (Narrative) (Detail) - USD ($)	12 Months Ended
Retirement Plan (Narrative) (Detail) - USD ($)	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Compensation And Retirement Disclosure [Abstract]
Matching contribution by employer percentage	50.00%
Employer defined contribution on per employee	$ 2,000
Defined contribution (401K match) for the period	$ 1,500,000	$ 1,100,000	$ 1,000,000

Debt (Narrative) (Detail)

Debt (Narrative) (Detail) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
Debt (Narrative) (Detail) - USD ($) $ in Thousands	Jan. 31, 2017	Dec. 31, 2016	Aug. 16, 2016
Debt Instrument [Line Items]
Amortization of deferred debt financing costs		$ 1,631
Debt instrument, covenant compliance		The Company is in compliance with these covenants as of December 31, 2016.
Initial Term B Loan Facility
Debt Instrument [Line Items]
Term of loan facility		6 years
Outstanding debt under term facility		$ 698,250
Debt instrument, description of variable rate basis		LIBOR
Convertible notes receivable maturity date		Aug. 16, 2022
Principal payment commencing date		Dec. 31, 2016
The minimum percentage quarterly principal payments		0.25%
Debt instrument, frequency of principal payment		Quarterly
Initial Term B Loan Facility \| Subsequent Event
Debt Instrument [Line Items]
Debt instrument, payment of outstanding principal balance	$ 86,000
Initial Term B Loan Facility \| Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on margin rate		2.00%
Initial Term B Loan Facility \| LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on margin rate		3.00%
Initial Term B Loan Facility \| Minimum \| LIBOR
Debt Instrument [Line Items]
Interest rate during period		0.75%
Interim Term Loan Facility
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis		LIBOR
Interim Term Loan Facility \| Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on margin rate		1.00%
Interim Term Loan Facility \| LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on margin rate		2.00%
Term Facility
Debt Instrument [Line Items]
Contractual interest expense		$ 10,200
Amortization of deferred debt financing costs		$ 1,600
JPMorgan Chase Bank, N.A.
Debt Instrument [Line Items]
Line of Credit Facility, initiation date		Aug. 16, 2016
JPMorgan Chase Bank, N.A. \| Initial Term B Loan Facility
Debt Instrument [Line Items]
Outstanding debt under term facility			$ 700,000
JPMorgan Chase Bank, N.A. \| Interim Term Loan Facility
Debt Instrument [Line Items]
Outstanding debt under term facility			$ 50,000

Debt (Summary of Outstanding Bo

Debt (Summary of Outstanding Borrowings from Term Facility) (Detail) $ in Thousands	Dec. 31, 2016USD ($)
Debt Instrument [Line Items]
Current Portion of Long-Term Debt	$ 3,865
Long-Term Debt	675,414
Initial Term B Loan Facility
Debt Instrument [Line Items]
Principal Outstanding	698,250
Unamortized Deferred Financing Costs	18,971
Principal Outstanding, net of Unamortized Deferred Financing Costs	679,279
Current Portion of Long-Term Debt	3,865
Long-Term Debt	$ 675,414

Segment and Geographic Inform76

Segment and Geographic Information - (Narrative) (Detail)	12 Months Ended
Segment and Geographic Information - (Narrative) (Detail)	Dec. 31, 2016SegmentMarket
Segment Reporting [Abstract]
Number of operating segments \| Segment	1
Number of markets \| Market	2

Segment and Geographic Inform77

Segment and Geographic Information (Net Revenue by Markets) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net revenue	$ 603,314	$ 412,744	$ 372,978
Enterprise, Datacenter, and Service Provider Markets
Segment Reporting Information [Line Items]
Net revenue	568,812	377,809	341,056
Broadband and Consumer Markets
Segment Reporting Information [Line Items]
Net revenue	$ 34,502	$ 34,935	$ 31,922

Segment and Geographic Inform78

Segment and Geographic Information (Net Revenues by Geographic Area) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net revenues	$ 603,314	$ 412,744	$ 372,978
United States
Segment Reporting Information [Line Items]
Net revenues	196,727	128,431	111,997
China
Segment Reporting Information [Line Items]
Net revenues	139,957	100,980	93,045
Korea
Segment Reporting Information [Line Items]
Net revenues	54,367	28,578	28,665
Taiwan
Segment Reporting Information [Line Items]
Net revenues	39,839	34,533	29,229
Mexico
Segment Reporting Information [Line Items]
Net revenues	28,563	34,452	27,184
Finland
Segment Reporting Information [Line Items]
Net revenues	38,768	38,283	44,976
Singapore
Segment Reporting Information [Line Items]
Net revenues	20,982	3,767	2,421
Malaysia
Segment Reporting Information [Line Items]
Net revenues	16,482	11,728	9,059
Other Countries
Segment Reporting Information [Line Items]
Net revenues	$ 67,629	$ 31,992	$ 26,402

Segment and Geographic Inform79

Segment and Geographic Information (Tangible Long Lived Assets) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Property and equipment, net	$ 150,862	$ 64,677
United States
Segment Reporting Information [Line Items]
Property and equipment, net	115,328	52,547
All Other Countries
Segment Reporting Information [Line Items]
Property and equipment, net	$ 35,534	$ 12,130

Commitments and Contingencies80

Commitments and Contingencies (Narrative) (Detail) $ in Thousands

Jan. 31, 2017ft²

Nov. 18, 2016ft²

Sep. 29, 2016USD ($)

Sep. 27, 2016USD ($)

Oct. 31, 2016USD ($)

Sep. 30, 2016USD ($)

Mar. 31, 2015USD ($)Installments

Dec. 31, 2016USD ($)

Dec. 31, 2015USD ($)

Dec. 31, 2014USD ($)

Nov. 08, 2016USD ($)

Jul. 31, 2016USD ($)Installments

Disclosure Commitments And Contingencies Narrative Detail [Line Items]

Lease expiration period

Oct. 1,
2025

Operating leases, rent expense

$ 11,300

$ 8,000

$ 6,400

Intangible assets, net

764,885

$ 35,492

QLogic Corporation

Disclosure Commitments And Contingencies Narrative Detail [Line Items]

Manufacturing rights buy-out consideration

75,000

Intangible assets, net

42,800

QLogic Corporation | Cost of revenue

Disclosure Commitments And Contingencies Narrative Detail [Line Items]

Manufacturing rights buy-out consideration

32,200

QLogic Corporation | Manufacturing buy-out - Third Party ASIC Vendor A

Disclosure Commitments And Contingencies Narrative Detail [Line Items]

Payment for manufacturing buy-out consideration

$ 55,000

Payment for royalty buy-out fee

$ 10,000

QLogic Corporation | Manufacturing buy-out - Third Party ASIC Vendor B

Disclosure Commitments And Contingencies Narrative Detail [Line Items]

Payment for manufacturing buy-out consideration

$ 7,500

Manufacturing rights buy-out consideration

$ 10,000

Amount placed in escrow

$ 2,500

Xpliant, Inc

Disclosure Commitments And Contingencies Narrative Detail [Line Items]

Number of equal installments | Installments

Manufacturing rights licensing fee

$ 7,500

License fee periodic payment description

The manufacturing rights licensing fee was payable in four equal quarterly payments, with the first installment payment due on April 29, 2015 and each of the subsequent three installment payments were due on the first day of the following calendar quarter.

Capital Lease

Disclosure Commitments And Contingencies Narrative Detail [Line Items]

Lease expiration period

Aug. 31,
2019

May 31,
2019

Long-term purchase commitment, amount

$ 31,500

$ 28,500

$ 15,600

Purchase agreement description

Company signed design tools purchase agreements with a third party vendor for an aggregate total consideration of $15.6 million, payable in equal quarterly installments up to May 2019. The present value of the aggregate total consideration was recorded as design tools under property and equipment which will be amortized over the term of the license and the related liability was recorded under capital lease and technology license obligations.

Term of purchase agreement

3 years

Long-term purchase commitment effective date

Oct. 1,
2016

Design Kit License Agreements

Disclosure Commitments And Contingencies Narrative Detail [Line Items]

Aggregate consideration payable

$ 9,000

Number of equal installments | Installments

Design Tools New Purchase Agreement | Capital Lease

Disclosure Commitments And Contingencies Narrative Detail [Line Items]

Purchase agreement description

Company signed a new purchase agreement with a third party vendor for $31.5 million, payable in quarterly installments up to August 2019, in exchange for a three-year license to certain design tools effective October 1, 2016. This new purchase agreement replaced the purchase agreement entered into by the Company in October 2014 with the same third party company for $28.5 million in exchange for a three-year license to certain design tools.

Irvine, California

Disclosure Commitments And Contingencies Narrative Detail [Line Items]

Leased area | ft²

105,600

Lease term

8 years

Lease term commencement date

Oct. 31,
2017

San Jose, California | Subsequent Event

Disclosure Commitments And Contingencies Narrative Detail [Line Items]

Lease expiration period

Jul. 31,
2027

Leased area | ft²

116,000

Lease agreement commencement date

Jan. 31,
2017

Commitments and Contingencies81

Commitments and Contingencies (Minimum Commitments Under Non-Cancelable Operating and Capital Lease Agreements) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Total capital lease, technology license and operating lease obligations
Current portion of the obligations	$ 25,535	$ 20,608
Long-term portion of obligations	27,878	$ 9,858
2,017	42,806
2,018	33,611
2,019	25,212
2,020	14,153
2,021	13,110
2022 thereafter	20,011
Total	148,903
Capital Lease and Technology License Obligations
Total capital lease, technology license and operating lease obligations
2,017	26,919
2,018	18,124
2,019	10,643
Total	55,686
Less: Interest component (3.75% annual rate)	2,273
Present value of minimum lease payment	53,413
Operating Leases
Total capital lease, technology license and operating lease obligations
2,017	15,887
2,018	15,487
2,019	14,569
2,020	14,153
2,021	13,110
2022 thereafter	20,011
Total	$ 93,217

Commitments and Contingencies82

Commitments and Contingencies (Minimum Commitments Under Non-Cancelable Operating and Capital Lease Agreements) (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2016
Capital Lease and Technology License Obligations
Total capital lease, technology license and operating lease obligations
Interest rate	3.75%

Valuation and Qualifying Acco83

Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for Doubtful Accounts
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	$ 24	$ 24	$ 24
Additions	28		1
Deductions	(28)		(1)
Balance at end of period	24	24	24
Allowance for Customer Returns
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	1,444	1,118	909
Additions	7,789	4,513	3,716
Deductions	(5,127)	(4,187)	(3,507)
Balance at end of period	4,106	1,444	1,118
Income Tax Valuation Allowance
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	127,328	105,638	79,928
Additions	188,587	21,690	25,710
Balance at end of period	$ 315,915	$ 127,328	$ 105,638