INPHI 10-K 28 Feb 18 2017 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Feb. 23, 2018	Jun. 30, 2017
Document Information [Line Items]
Entity Registrant Name	INPHI CORP
Entity Central Index Key	1,160,958
Trading Symbol	iphi
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes
Entity Common Stock, Shares Outstanding (in shares)		43,142,260
Entity Public Float			$ 1,410
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 163,450	$ 144,867
Investments in marketable securities	241,737	249,476
Accounts receivable, net	67,993	49,999
Inventories	31,721	32,039
Prepaid expenses and other current assets	12,208	23,139
Total current assets	517,109	499,520
Property and equipment, net	60,344	44,471
Goodwill	104,502	105,077
Identifiable intangible assets, net	222,933	327,063
Deferred tax charge		1,384
Other assets, net	12,618	13,080
Total assets	917,506	990,595
Current liabilities:
Accounts payable	14,721	14,039
Deferred revenue	435	3,630
Accrued employee expenses	15,214	16,588
Other accrued expenses	8,290	7,277
Other current liabilities	21,387	24,736
Total current liabilities	60,047	66,270
Convertible debt	421,431	396,857
Other long-term liabilities	24,627	64,944
Total liabilities	506,105	528,071
Commitments and contingencies (Note 17)
Stockholders’ equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized; no shares issued
Common stock, $0.001 par value; 500,000,000 shares authorized; 42,780,229 and 41,303,363 issued and outstanding at December 31, 2017 and 2016, respectively	43	41
Additional paid-in capital	484,934	459,928
Retained earnings (accumulated deficit)	(74,145)	1,976
Accumulated other comprehensive income	569	579
Total stockholders’ equity	411,401	462,524
Total liabilities and stockholders’ equity	$ 917,506	$ 990,595

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2017	Dec. 31, 2016
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, authorized (in shares)	10,000,000	10,000,000
Preferred stock, issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	500,000,000	500,000,000
Common stock, issued (in shares)	42,780,229	41,303,363
Common stock, outstanding (in shares)	42,780,229	41,303,363

Consolidated Statements of Inco

Consolidated Statements of Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue	$ 348,201	$ 266,277	$ 192,710
Cost of revenue	151,698	85,581	72,694
Gross profit	196,503	180,696	120,016
Operating expenses:
Research and development	200,539	108,013	87,774
Sales and marketing	42,381	26,534	21,462
General and administrative	23,782	21,201	20,322
Total operating expenses	266,702	155,748	129,558
Income (loss) from operations	(70,199)	24,948	(9,542)
Interest expense	(29,842)	(17,406)	(783)
Other income, net	3,961	3,914	221
Income (loss) before income taxes from continuing operations	(96,080)	11,456	(10,104)
Provision (benefit) for income taxes	(21,176)	(15,057)	5,857
Net income (loss) from continuing operations	(74,904)	26,513	(15,961)
Discontinued operations:
Gain from sale		78,544
Income (loss) from discontinued operations		(3,802)	4,535
Provision for income taxes		(1,799)	(2,125)
Net income from discontinued operations		72,943	2,410
Net income (loss)	$ (74,904)	$ 99,456	$ (13,551)
Basic
Net income (loss) from continuing operations (in dollars per share)	$ (1.78)	$ 0.65	$ (0.41)
Net income from discontinued operations (in dollars per share)		1.80	0.06
Basic earnings per share (in dollars per share)	(1.78)	2.45	(0.35)
Diluted
Net income (loss) from continuing operations (in dollars per share)	(1.78)	0.60	(0.41)
Net income from discontinued operations (in dollars per share)		1.65	0.06
Diluted earnings per share (in dollars per share)	$ (1.78)	$ 2.25	$ (0.35)
Weighted-average shares used in computing earnings per share:
Basic (in shares)	42,165,213	40,565,433	38,580,330
Diluted (in shares)	42,165,213	44,124,881	38,580,330

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income (loss)	$ (74,904)	$ 99,456	$ (13,551)
Other comprehensive income (loss):
Change in unrealized gain or loss, net of $0, $0, and $0 tax expense in 2017, 2016 and 2015, respectively	(9)	(172)	(87)
Realized gain reclassified into earnings, net of tax	(1)	(5)	(9)
Comprehensive income (loss)	$ (74,914)	$ 99,279	$ (13,647)

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income (Loss) (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Change in unrealized gain, tax	$ 0	$ 0	$ 0

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2014	37,310,963
Balance at Dec. 31, 2014	$ 37	$ 327,475	$ (89,190)	$ 852	$ 239,174
Issuance of common stock from exercise of stock options (in shares)	722,913
Issuance of common stock from exercise of stock options	$ 1	6,144			6,145
Issuance of common stock from restricted stock unit grant, net of shares withheld for tax (in shares)	1,028,650
Issuance of common stock from restricted stock unit grant, net of shares withheld for tax	$ 1	(12,914)			$ (12,913)
Issuance of common stock from employee stock purchase plan (in shares)	326,764				326,764
Issuance of common stock from employee stock purchase plan		4,583			$ 4,583
Income tax benefit adjustment from stock option exercises		4,305			4,305
Stock-based compensation expense		28,293			28,293
Conversion feature of convertible debt, net of issuance costs		52,532			52,532
Purchase of capped calls		(17,802)			(17,802)
Net income (loss)			(13,551)		(13,551)
Other comprehensive loss, net				(96)	(96)
Balance (in shares) at Dec. 31, 2015	39,389,290
Balance at Dec. 31, 2015	$ 39	392,616	(102,741)	756	290,670
Issuance of common stock from exercise of stock options (in shares)	587,229
Issuance of common stock from exercise of stock options	$ 1	5,786			5,787
Issuance of common stock from restricted stock unit grant, net of shares withheld for tax (in shares)	1,041,743
Issuance of common stock from restricted stock unit grant, net of shares withheld for tax	$ 1	(20,478)			$ (20,477)
Issuance of common stock from employee stock purchase plan (in shares)	285,101				285,101
Issuance of common stock from employee stock purchase plan		5,518			$ 5,518
Stock-based compensation expense		30,192			30,192
Conversion feature of convertible debt, net of issuance costs		68,834			68,834
Purchase of capped calls		(22,540)			(22,540)
Net income (loss)			99,456		99,456
Other comprehensive loss, net				(177)	(177)
Cumulative effect of change in accounting principle			5,261		5,261
Balance (in shares) at Dec. 31, 2016	41,303,363
Balance at Dec. 31, 2016	$ 41	459,928	1,976	579	$ 462,524
Issuance of common stock from exercise of stock options (in shares)	300,982				300,982
Issuance of common stock from exercise of stock options	$ 1	2,174			$ 2,175
Issuance of common stock from restricted stock unit grant, net of shares withheld for tax (in shares)	1,004,785
Issuance of common stock from restricted stock unit grant, net of shares withheld for tax	$ 1	(27,776)			$ (27,775)
Issuance of common stock from employee stock purchase plan (in shares)	171,099				171,099
Issuance of common stock from employee stock purchase plan		5,776			$ 5,776
Stock-based compensation expense		44,832			44,832
Net income (loss)			(74,904)		(74,904)
Other comprehensive loss, net				(10)	(10)
Cumulative effect of change in accounting principle			(1,217)		(1,217)
Balance (in shares) at Dec. 31, 2017	42,780,229
Balance at Dec. 31, 2017	$ 43	$ 484,934	$ (74,145)	$ 569	$ 411,401

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities
Net income (loss)	$ (74,904)	$ 99,456	$ (13,551)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	77,855	31,216	26,884
Stock-based compensation	44,833	30,192	28,293
Gain from sale of discontinued operations		(78,544)
Gain from sale of cost method investment		(1,138)
Loss (gain) on disposal and abandonment of property and equipment	(174)		1,958
Impairment of intangible assets	47,014		1,750
Deferred income taxes	(22,428)	(15,539)	(142)
Amortization of deferred tax charge		938	939
Accretion of convertible debt and amortization of issuance expenses	24,574	14,178	592
Amortization of premiums on marketable securities	1,040	1,496	554
Other noncash items	(10)	(5)	(9)
Changes in assets and liabilities:
Accounts receivable	(17,392)	(17,028)	6,496
Inventories	318	(6,384)	8,822
Prepaid expenses and other assets	2,272	(1,389)	2,200
Income tax payable/receivable	(638)	1,411	6,441
Accounts payable	1,655	3,523	(209)
Accrued expenses	(554)	(45)	3,413
Deferred revenue	(3,195)	(1,280)	(443)
Other liabilities	(2,958)	2,015	(1,445)
Net cash provided by operating activities	77,308	63,073	72,543
Cash flows from investing activities
Purchases of property and equipment	(37,437)	(22,348)	(16,557)
Proceeds from sale or disposal of property and equipment	100		75
Purchases of marketable securities	(261,247)	(330,592)	(21,906)
Sales of marketable securities	85,163	5,504	3,937
Maturities of marketable securities	182,299	116,627	12,580
Proceeds from sale of cost method investment		6,345
Proceeds from sale of discontinued operations	10,690	78,750
Acquisition of business, net of cash acquired	(1,800)	(294,444)
Payment of debt related to purchase of intangible asset	(16,109)	(55)
Purchase of cost-method investment in private companies		(8,000)	(2,000)
Net cash used in investing activities	(38,341)	(448,213)	(23,871)
Cash flows from financing activities
Proceeds from exercise of stock options	2,214	5,748	6,145
Proceeds from employee stock purchase plan	5,776	5,518	4,583
Proceeds from issuance of convertible debt, net of issuance costs		279,459	223,993
Purchase of capped call options		(22,540)	(17,802)
Minimum tax withholding paid on behalf of employees for net share settlement	(27,673)	(20,477)	(12,913)
Long-term loan	333	(725)
Payment of capital lease obligations	(1,034)	(20)
Net cash provided by (used in) financing activities	(20,384)	246,963	204,006
Net increase (decrease) in cash and cash equivalents	18,583	(138,177)	252,678
Cash and cash equivalents at beginning of year	144,867	283,044	30,366
Cash and cash equivalents at end of year	163,450	144,867	283,044
Supplemental cash flow information
Income taxes paid	2,158	156	723
Interest paid	5,194	2,537
Supplemental disclosure of non-cash investing and financing activities
Intangible assets financed with debt	$ 2,888	$ 39,046

Note 1 - Organization and Summa

Note 1 - Organization and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1. Inphi Corporation (the “Company”), a Delaware corporation, was incorporated in November 2000. and mixed signal semiconductor solutions for the communications and datacenter markets. The Company’s semiconductor solutions are designed to address bandwidth bottlenecks in networks, maximize throughput and minimize latency in computing environments and enable the rollout of next generation communications and datacenter infrastructures. In addition, the semiconductor solutions provide a vital high-speed interface between analog signals and digital information in high-performance systems such as telecommunications transport systems, enterprise networking equipment and datacenters. On August 4, 2016, $90,000. 3. On December 12, 2016, , Inc. (ClariPhy) for $303,661 December 12, 2016. 2. The Company is subject to certain risks and uncertainties and believes changes in any of the following areas could have a material adverse effect on the Company ’s future financial position or results of operations or cash flows: ability to sustain profitable operations due to losses incurred and accumulated deficit in prior years, dependence on a limited number of customers for a substantial portion of revenue, product defects, risks related to intellectual property matters, lengthy sales cycle and competitive selection process, lengthy and expensive qualification process, ability to develop new or enhanced products in a timely manner, market development of and demand for the Company’s products, reliance on third Basis of Presentation The accompanying consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) and include the accounts of Inphi, Cortina, ClariPhy and subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Business Combinations The Company accounts for acquisitions of business using the purchase method of accounting, which requires the Company to recognize separately from goodwill the assets acquired and the liabilities assumed at their acquisition date fair values. While the Company use s its best estimates and assumptions to accurately value assets acquired and liabilities assumed at the acquisition date as well as contingent consideration, where applicable, the estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may one may Accounting for business combinations requires management to make significant estimates and assumptions, especially at the acquisition date including the Company’s estimates for intangible assets, contractual obligations assumed and pre-acquisition contingencies where applicable. Although the Company believes the assumptions and estimates made in the past have been reasonable and appropriate, they are based in part on historical experience and information obtained from the management of the acquired companies and are inherently uncertain. Critical estimates in valuing certain of the intangible assets the Company acquired include future expected cash flows from product sales, customer contracts and acquired technologies, expected costs to develop in-process research and development (IPR&D) into commercially viable products and estimated cash flows from the projects when completed and discount rates. Unanticipated events and circumstances may may Use of Estimates The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. On an ongoing basis, management evaluates its estimates, including those related to (i) the collectibility of accounts receivable and allowance for distributors’ price discounts; (ii) write-down for excess and obsolete inventories; (iii) warranty obligations; (iv) the value assigned to and estimated useful lives of long-lived assets; (v) the realization of tax assets and estimates of tax liabilities and tax reserves; (vi) the valuation of equity securities; (vii) amounts recorded in connection with acquisitions; (viii) recoverability of intangible assets and goodwill; and (ix) the recognition and disclosure of fair value of convertible debt and contingent liabilities. These estimates are based on historical data and experience, as well as various other factors that management believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not third may Foreign Currency Translation The Company and its subsidiaries use the U.S. dollar as its functional currency. Foreign currency assets and liabilities are remeasured into U.S. dollars at the end-of-period exchange rates except for non-monetary assets and liabilities, which are remeasured at historical exchange rates. Revenue and expenses are remeasured at the exchange rate in effect during the period the transaction occurred, except for those expenses related to balance sheet amounts, which are remeasured at historical exchange rates. Gains or losses from foreign currency transactions are included in the Consolidated Statements of Income (Loss) as part of “Other income, net”. Foreign currency gain (loss) in 2017, 2016 2015 $22, $434 $524 Cash and Cash Equivalents The Company considers all highly liquid investments with an original or remaining maturity of three one may Fair Market Value of Financial Instruments The carrying amount reflected in the balance sheet for cash and cash equivalents, accounts receivable, prepaid and other current assets, accounts payable, accrued expenses and other current liabilities, approximate fair value due to the short-term nature of these financial instruments. Investments in Marketable Securities Investments in marketable securities consist of available-for-sale securities. These investments are recorded at fair value with changes in fair value, net of applicable taxes, recorded as unrealized gains (losses) as a component of accumulated other comprehensive income in stockholders' equity. Realized gains and losses are included in Other income, net. The cost basis for realized gains and losses on available-for-sale securities is determined on a specific identification basis. The Company periodically evaluate whether declines in fair values of our investments below their book values are other-than-temporary. When the fair value is lower than the amortized cost, the Company considers whether: ( 1 2 not 3 not not not not Inventories Inventories are stated at the lower of cost or net realizable value . Cost is computed using standard cost, which approximates actual cost, on a first first not $3,133 $3,967 December 31, 2017 2016, Property and Equipment Property and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization is provided on property and equipment over the estimated useful lives on a straight-line basis. Leasehold improvements are amortized on a straight-line basis over the shorter of their estimated useful lives or lease terms. Repairs and maintenance are charged to expense as incurred. Useful lives by asset category are as follows: Asset Category Years Office equipment 3 Software 3 Leasehold improvements Shorter of lease term or estimated useful life Production equipment 2 Computer equipment 5 Lab equipment 5 Furniture and fixtures 7 Equipment Under Capital Leases The Company leases certain of its equipment under capital lease agreements. The assets and liabilities under capital leases are initially recorded at the fair value of the assets under lease. The capital lease obligation outstanding at December 31, 2017 and 2016 $1,396 $2,430, Intangible Assets Intangible assets represent rights acquired for developed technology, customer relationships , trademark, patents and IPR&D in connection with the business acquisitions. Intangible assets with finite useful lives are amortized over periods ranging from one ten Impairment of Long-lived Assets and Goodwill Long-lived Assets The Company assesses the impairment of long-lived assets, which consist primarily of property and equipment and intangible assets, whenever events or changes in circumstances indicate that such assets might be impaired and the carrying value may not may ’s operating model or strategy and competitive forces. If events or changes in circumstances indicate that the carrying amount of an asset may not ’s carrying value over its fair value is recorded. Fair value is determined based on the present value of estimated expected future cash flows using a discount rate commensurate with the risk involved, quoted market prices or appraised values, depending on the nature of the assets. Goodwill Goodwill is recorded when the consideration paid for a business acquisition exceeds the fair value of net tangible and intangible assets acquired. Goodwill is measured and tested for impairment on an annual basis during the fourth To review for impairment, the Company first not not not no not no 2017, 2016 2015. Internal Use Software Costs Certain external computer software costs acquired for internal use are capitalized. Training costs and maintenance are expensed as incurred, while upgrades and enhancements are capitalized if it is probable that such expenditures will result in additional functionality. Capitalized costs are included within property and equipment. In 2016, not the Company should account for the arrangement as a service contract. Revenue Recognition The Company ’s products are fully functional at the time of shipment and do not not Product revenue is recognized upon shipment of product to customers, net of accruals for estimated sales returns and allowances, which to date, have not Certain distributors may not The Company recognizes revenue from the sales and licensing of its intellectual property when the following fundamental criteria are met: (i) persuasive evidence of an arrangement exists, (ii) delivery has occurred, (iii) the sales price is fixed or determinable, and (iv) collection of resulting receivables is reasonably assured. Occasionally, the Company enters into development agreements with some of its customers and recognizes revenue from these agreements upon completion and acceptance by the customer of contract deliverables or as services are provided, depending on the terms of the arrangement. Revenue is deferred for any amounts billed or received prior to completion of milestones or delivery of services. Revenue from non-product sales was less than 3%, 1%, 2% December 31, 2017, 2016, 2015, Cost of Revenue Cost of revenue includes cost of materials, such as wafers processed by third ing and shipping, cost of personnel, including stock-based compensation, and equipment associated with manufacturing support, logistics and quality assurance, warranty cost, amortization and impairment of developed technology, amortization of step-up values of inventory, write-down of inventories, amortization of production mask costs, overhead and an allocated portion of occupancy costs. Warranty The Company ’s products are under warranty against defects in material and workmanship generally for a period of one two may December 31, 2017 2016, $110 Research and Development Expense Research and development expense consists of costs incurred in performing research and development activities including salaries, stock-based compensation, employee benefits, occupancy costs, pre-production engineering mask costs, impairment of in-process research and development, overhead costs and prototype wafer, packaging and test costs. Research and development costs are expensed as incurred. The Company enters into development agreements with some of the Company’s customers. Recoveries from nonrecurring engineering services from early stage technology are recorded as an offset to product development expense incurred in support of this effort and serve as a mechanism to partially recover development expenditures. These reimbursements are recognized upon completion and acceptance by the customer of contract deliverables or milestones. The Company recorded approximately $3,000, $2,400, $10,750 December 31, 2017, 2016 2015, Sales and Marketing Expense Sales and marketing expense consists of salaries, stock-based compensation, employee benefits, travel , trade show costs, amortization of intangibles and others. The Company expenses sales and marketing costs as incurred. Advertising expenses for the years ended December 31, 2017, 2016 2015 not General and Administrative Expense General and administrative expense consists of salaries, stock-based compensation, employee benefits and expenses for executive management, legal, finance and others. In addition, general and administrative expense includes fees for professional services and occupancy costs. These costs are expensed as incurred. Income Taxes Deferred tax assets and liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities, and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. The Company recognizes the deferred income tax effects of a change in tax rates in the period of enactment. The Company must also make judgments in evaluating whether deferred tax assets will be recovered from future taxable income. To the extent that it believes that recovery is not not not not” may may In accordance with FASB ’s guidance on Accounting for Uncertainty in Income Taxes, the Company performs a comprehensive review of uncertain tax positions regularly. In this regard, an uncertain tax position represents an expected treatment of a tax position taken in a filed tax return, or planned to be taken in a future tax return or claim, which has not not The Company recognizes potential interest and penalties on uncertain tax positions within provision (benefit) for income taxes on the consolidated statement of income. On December 22, 2017, the “Tax Reform Act”) was signed into law. The Tax Reform Act contains significant changes to U.S. federal corporate income taxation, including a reduction of the corporate tax rate from 35% 21% January 1, 2018, one 100% first 21%. December 2017, No. 118, 118 not one 11 Stock-Based Compensation Stock-based compensation for stock option and restricted stock units issued to the Company’s employees is measured at the grant date based on the fair value of the award and is recognized as expense over the requisite service period, which is the vesting period, on a straight-line basis. The fair value of restricted stock units is based on the fair market value of the Company’s common stock on the date of grant. Historically, the Company granted stock options to employees and the Company uses the Black-Scholes option pricing model for valuing stock option awards granted to employees and directors at the grant date. Determining the fair value of stock option awards at the grant date requires the input of various assumptions, including fair value of the underlying common stock, expected future share price volatility, expected term, risk-free interest rate and dividend rate. Changes in these assumptions can materially affect the fair value of the options. The Company based its estimate of expected volatility on the estimated volatility of similar entities whose share prices are publicly available. The risk-free interest rate is based on the U.S. Treasury yields in effect at the time of grant for periods corresponding to the expected life of the options. The weighted average expected life of options was calculated using the simplified method. This decision was based on the lack of relevant historical data due to the Company’s limited experience. The expected dividend yield is zero not no The Company has elected to treat share-based payment awards with graded vesting schedules and time-based service conditions as single awards and recognizes stock-based compensation expense on a straight-line basis (net of estimated forfeitures) over the requisite service period. The Company recognizes non-employee stock-based compensation expenses based on the estimated fair value of the equity instrument determined using the Black-Scholes option pricing model. Management believes that the fair value of the stock options is more reliably measured than the fair value of the services received. The fair value of each non-employee variable stock award is re-measured each period until a commitment date is reached, which is generally the vesting date. Earnings per Share Basic earnings per share is calculated by dividing income allocable to common stockholders by the weighted average number of shares of common stock outstanding during the period. Diluted earnings per share is calculated by dividing the net income allocable to common stockholders by the weighted average number of common shares outstanding, adjusted for the effects of potentially dilutive common stock, which are comprised of stock options, restricted stock units, employee share purchase plan and the shares that could be issued upon conversion of the Company’s convertible debt. The capped call options in connection with the issuance of the convertible notes are excluded from the calculation of diluted earnings per share as their impact is always anti-dilutive. Segment Information The Company operates in one reporting segment related to the design, development and sale of high-speed analog connectivity components that operate to maintain, amplify and improve signal integrity at high-speeds in a wide variety of applications. The Company’s chief operating decision-maker is its Chief Executive Officer, who reviews operating results on an aggregate basis and manages the Company’s operations as a single operating segment. Recent Accounting Pronouncements In May 2014, five The FASB issued several updates to the guidance. The Company will adopt the new revenue guidance effective January 1, 2018, not Upon adoption, the Company will recognize the cumulative effect of adopting this guidance as an adjustment to the opening balance of retained earnings which is not not The Company expects the adoption of this guidance will not In July 2015, January 1, 2017. The adoption of this standard did not In January 2016, may not ’s other deferred tax assets. The guidance is applied by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption and is effective for the Company in its first 2018. The Company expects the adoption of this guidance will not In February 2016, 12 January 1, 2019. In March 2016, s the requirement that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods that the investment had been held. The guidance requires that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor’s previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting. Therefore, upon qualifying for the equity method of accounting, no January 1, 2017. not In August 2016, 2018, The Company expects the adoption of this guidance will not In October 2016, 2018, 11 In January 2017, 2018. not In January 2017, 2 2 ’s goodwill with the carrying amount of that goodwill. The new guidance requires an entity to compare the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. The new guidance becomes effective for goodwill impairment tests in fiscal years beginning after December 15, 2019, In May 2017, s. The guidance will be effective for calendar year-end beginning after December 15, 2017. not

Note 2 - Acquisitions

Note 2 - Acquisitions	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Business Combination Disclosure [Text Block]	2. s On December 12, 2016, $303,661 $30,000 24 The acquisition has been accounted for using the purchase method of accounting which requires, among other things, that assets acquired and liabilities assumed be recognized at their fair values as of the acquisition date. The Company allocated the purchase price to tangible and intangible assets acquired and liabilities assumed based on their estimated fair values. The fair value of identifiable intangible assets acquired was based on estimates and assumptions made by management at the time of acquisition. As additional information becomes available, such as finalization of the estimated fair value of tax related items, the Company may not 12 may The following table summarizes the purchase price allocation: Preliminary Allocation Allocation Adjustments Final Allocation Cash $ 7,417 $ — $ 7,417 Receivables 2,552 602 3,154 Inventories 13,774 — 13,774 Other current assets 2,739 (123 ) 2,616 Property and equipment 6,163 — 6,163 Identifiable intangible assets 138,558 — 138,558 In-process research and development 97,340 — 97,340 Other noncurrent assets 753 — 753 Accounts payable, accrued expenses and other current liabilities (13,667 ) 2 (13,665 ) Deferred tax liabilities, noncurrent (42,958 ) 94 (42,864 ) Other liabilities (5,647 ) — (5,647 ) Total identifiable net assets 207,024 575 207,599 Goodwill 96,637 (575 ) 96,062 Net assets acquired $ 303,661 $ — $ 303,661 As of the acquisition date, the fair value of receivables, other assets, accounts payable , accrued expenses and other liabilities approximated the book value acquired. The following table summarizes the estimated fair value of intangible assets and their estimated useful lives as of the date of acquisition: Estimated Fair Value Estimated Useful Life (Years) Developed technology $ 66,450 1-6 Customer relationships 62,370 7 Trade name 1,390 5 Software 8,348 1-3 In-process research and development 97,340 — $ 235,898 Developed technology was valued using the multi-period excess earnings method under the income approach. This method involves discounting the direct cash flow expected to be generated by the technologies over their remaining lives, net of returns on contributory assets. The estimated useful life was determined based on the technology cycle related to each product family and its expected contribution to forecast ed revenue. Customer relationships were valued using the incremental cash flow approach which involved discounting management’s estimate of the incremental revenues afforded by having the existing customer relationships in place as of the acquisition date, net of operating expense, taxes and returns on contributory assets. The estimated useful life was determined based on the estimated customer product or program ramp-up period required to develop the similar existing customer revenue base. Trade name was valued based on application of relief-from-royalty approach under the income approach. This method is based on the application of a royalty rate to forecasted revenue. The estimated useful life was determined based on the expected life of the trade names, the history of the trade names and the cash flows anticipated over the forecasted periods. In-process research and development was valued using the multi-period excess earnings method under the income approach, with the additional inclusion of estimated costs required to complete the projects. The Company capitalized $97,340 Upon completion of the remaining project, the related IPR&D assets will be amortized over their estimated useful lives. If the project is abandoned, the Company will be required to impair the related IPR&D asset. The following table summarizes the details of the IPR&D: Description IPR&D Percentage of Completion Estimated Cost to Complete Expected Release Date M200 $ 60,500 67 % $ 12,064 2018 Lightspeed III 36,840 26 % 39,176 2019 Discount rates of 17% 20% During the year ended December 31, 2017, Lightspeed III project resulting in an impairment charge of $47,014, $10,174 $36,840 December 31, 2017. Goodwill is calculated as the excess of the consideration transferred over the net assets recognized and is attributable to the work force of ClariPhy, the Company’s going concern value with the opportunity to leverage its work force to develop new technologies and the ability of the Company to grow the business faster and more profitable than was possible by ClariPhy as a stand-alone company. Goodwill is not not The Company incurred acquisition costs of $1, 738 December 31, 2016. C lariPhy contributed revenue of $1,128 $2,361 December 12, 2016 December 31, 2016. Pro Forma Information The following unaudited pro forma financial information presents a summary of the Company ’s consolidated results of operations for the years ended December 31, 2016 2015, January 1, 2015. Pro Forma 6 Pro Forma Year Ended 5 (unaudited) (unaudited) Revenue $ 304,820 $ 228,040 Net income (loss) $ 48,481 $ (48,356 ) Earnings per share – basic $ 1.20 $ (1.25 ) Earnings per share – diluted $ 1.10 $ (1.25 ) The unaudited pro forma consolidated results were prepared using the acquisition method of accounting and are based on the historical financial information of the Company and C lariPhy, reflecting the results of operations for the years ended December 31, 2016 2015. not not

Note 3 - Discontinued Operation

Note 3 - Discontinued Operations	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	3. As discussed in Note 1, August 4, 2016, $90,000 $11,250 twelve June 29, 2016 . During the year ended December 31, 2017, $10,690 $78,544 December 31, 2016. The components of the gain on sale of the Business were as follows: Cash proceeds from sale $ 90,000 Less book value of assets sold: Inventories (5,947 ) Prepaid expenses (250 ) Property and equipment (7,051 ) Goodwill (714 ) Deferred revenue 1,757 Liabilities 749 Gain on sale $ 78,544 The results of discontinued operations for the years ended December 31, 2016 2015: Year Ended December 31, 2016 2015 Revenue $ 24,418 $ 53,906 Cost of revenue (13,367 ) (25,600 ) Operating expenses (15,029 ) (23,771 ) Other income 176 — Gain on sale 78,544 — Provision for income taxes (1,799 ) (2,125 ) Net income from discontinued operations $ 72,943 $ 2,410 The results of discontinued operations include the following: Year Ended December 31, 2016 2015 Depreciation and amortization $ 1,103 $ 2,044 Stock-based compensation expense 2,194 4,980 Property and equipment expenditures 2,455 2,265 In connection with the sale of the Business, the Company entered into a transition service agreement with Rambus under which the Company provided certain services on an interim, transitional basis, for a period of six December 31, 2016 $1,563.

Note 4 - Investments

Note 4 - Investments	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Investment [Text Block]	4 . Investments The following table summarizes the investments by investment category: December 31, 201 7 Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value Available-for-sale securities: Municipal bonds $ 27,725 $ — $ (68 ) $ 27,657 Corporate notes/bonds 146,549 49 (197 ) 146,401 Variable rate demand notes 3,500 — — 3,500 Asset -backed securities 7,197 — (12 ) 7,185 Commercial paper 57,006 1 (13 ) 56,994 Total investments $ 241,977 $ 50 $ (290 ) $ 241,737 December 31, 201 6 Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value Available-for-sale securities: US treasury securities $ 3,999 $ 1 $ — $ 4,000 Municipal bonds 45,289 3 (121 ) 45,171 Corporate notes/bonds 112,330 36 (161 ) 112,205 Variable rate demand notes 58,930 — — 58,930 Asset-backed securities 5,221 2 — 5,223 Commercial paper 23,945 2 — 23,947 Total investments $ 249,714 $ 44 $ (282 ) $ 249,476 As of December 31, 2017, 102 December 31, 2017 The realized gain related to the Company ’s available-for-sale investment, which was reclassified from accumulated other comprehensive income, was included in other income in the consolidated statements of income. The contractual maturities of available-for-sale securities at December 31, 201 7 Cost Fair Value Due in one year or less $ 172,561 $ 172,443 Due between one and five years 65,916 65,794 Due after five years 3,500 3,500 $ 241,977 $ 241,737 In 201 6, $8,000. 10% not , therefore, the investments are accounted for under the cost method and included in other assets in the Company’s consolidated balance sheets. As of both December 31, 2017 2016, $10,000 . No December 31, 2017 2016. July 2016, $8,759, $2,414 $1,138 December 31, 2016.

Note 5 - Concentrations

Note 5 - Concentrations	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	5 . Concentrations Financial instruments that subject the Company to concentrations of credit risk consist primarily of cash, cash equivalents and trade accounts receivable. The Company extends differing levels of credit to customers and does not both December 31, 2017 2016, $155 December 31, 2017 2016, $1,292 $2,643, The following table summarizes the significant customers ’ and distributors’ accounts receivable and revenue as a percentage of total accounts receivable and total revenue, respectively: December 31, Accounts Receivable 201 7 201 6 Customer A 29 % * Customer B 14 * Customer C 13 22 % Customer D * 13 Year Ended December 31, Revenue 201 7 201 6 201 5 Customer A 12 % * * Customer B * * * Customer C 12 13 % * * Less than 10% Customer A is a subcontractor of a direct customer that would be a “Customer E ” above. In the aggregate, revenue to Customer A and Customer E as a percentage of total revenue was approximately 17% December 31, 2017. 14% 16% December 31, 2017 2016, 11% 12% December 31, 2017 2016,

Note 6 - Inventories

Note 6 - Inventories	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Inventory Disclosure [Text Block]	6 . Inventories Inventories consist of the following: December 31, 201 7 2016 Raw materials $ 12,267 $ 1,648 Work in process 13,800 15,999 Finished goods 5,654 14,392 $ 31,721 $ 32,039 There were no December 31, 2017. Finished goods include amounts held by distributors of $805 December 31, 2016.

Note 7 - Property and Equipment

Note 7 - Property and Equipment, Net	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	7 . Property and Equipment, net Property and equipment consist of the following: December 31, 201 7 201 6 Laboratory and production equipment $ 94,609 $ 64,402 Office, software and computer equipment 28,594 25,248 Furniture and fixtures 1,698 1,396 Leasehold improvements 7,250 6,707 132,151 97,753 Less accumulated depreciation (71,807 ) (53,282 ) $ 60,344 $ 44,471 Depreciation and amortization expense for the years ended December 31, 2017, 2016 2015 $20,631, $15,943, $12,106, As of December 31, 2017 2016, $7,181 $6,453, $1,038, $1,152, $1,011 December 31, 2017, 2016 2015, Property and equipment not December 31, 2017 2016 $3,339 $4,221, The Company leases certain equipment under capital lease agreements. Assets held under capital leases are included in property and equipment above. Gross amount and accumulated depreciation of assets under capital lease as of December 31, 2017 $3,639 $898, December 31, 2016 $3,698 $36, The minimum lease payments under capital leases as of December 31, 201 7 201 8 $ 662 201 9 504 20 20 364 202 1 93 Total minimum lease payments 1,623 Less: Amount representing interest 227 Minimum lease payments, net of interest $ 1,396

Note 8 - Goodwill and Identifia

Note 8 - Goodwill and Identifiable Intangible Assets	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Goodwill and Intangible Assets Disclosure [Text Block]	8 . Goodwill and Identifiable Intangible Assets The following table presents details of identifiable intangible assets: December 31, 201 7 December 31, 201 6 Gross Accumulated Amortization Net Gross Accumulated Amortization Net Developed technology $ 126,300 $ 53,533 $ 72,767 $ 138,020 $ 26,579 $ 111,441 Customer relationships 70,540 11,954 58,586 70,540 2,227 68,313 Trade name 2,310 888 1,422 2,310 426 1,884 Patents 1,579 734 845 1,579 552 1,027 Software 47,039 18,226 28,813 47,394 336 47,058 In-process research and development 60,500 — 60,500 97,340 — 97,340 $ 308,268 $ 85,335 $ 222,933 $ 357,183 $ 30,120 $ 327,063 During the year ended December 31, 2017, $47,014, $10,174 $36,840 December 31, 2017. During the year ended December 31, 2015, -process research and development and recorded an impairment charge of $1,750 The following table presents amortization of intangible assets for t he years ended December 31, 2017, 2016 2015: Year Ended December 31, 2017 2016 2015 Cost of revenue $ 28,502 $ 12,223 $ 11,499 Research and development 18,352 336 — Sales and marketing 9,727 1,209 817 General and administrative 643 402 418 $ 57,224 $ 14,170 $ 12,734 Based on the amount of intangible assets subject to amortization at December 31, 2017, five 201 8 $ 52,367 201 9 48,619 20 20 21,118 202 1 17,919 202 2 12,161 Thereafter 10,249 $ 162,433 The weighted-average amortization periods remaining by intangible asset category were as follows (in years) : Developed technology 3.1 Customer relationship 6.0 Trade name 3.5 Patents 8.9 Software 1.9 During the year ended December 31, 2017, $575, the ClariPhy acquisition. During the year ended December 31, 2016, $95,923, $96,637 $714

Note 9 - Convertible Debt

Note 9 - Convertible Debt	12 Months Ended
	Dec. 31, 2017
Convertible Debt [Member]
Notes to Financial Statements
Debt Disclosure [Text Block]	9 . Convertible Debt In December 2015, $230,000 1.125% 2020 2015 2015 December 1, 2020, 2015 June 1 December 1 June 1, 2016. 24.8988 $1 2015, $40.16 2015 100% not Prior to the close of business on the business day immediately preceding June 1, 2020, may 2015 March 31, 2016 ( 20 not 30 130% five five $1 2015, 98% June 1, 2020, second may may 2015 The Convertible Notes 2015 not The Convertible Note s 2015 2015 2015 not or restrictions on the payments of dividends, the incurrence of indebtedness or the issuance or repurchase of securities by the Company or any of its subsidiaries. The Indenture 2015 (other than certain events of bankruptcy, insolvency or reorganization involving the Company) occurs and is continuing, the trustee under the Indenture 2015 25% 2015 may, 100% 2015 100% 2015 2015 2015 2015. December 31, 2017, none 2015 In accounting for the issuance of the Convertible Notes 2015, 2015 not 2015 2015 $230,000 $175,974 $54,026. $6,359, $6,007 December 31, 2015 2016, $4,864 $1,495 December 31, 2017 $13,574, $2,588 $10,079 $907 December 31, 2016 $12,853, $2,577 $9,427 $849 December 31, 2015 $783, $192 $543 $48 In connection with the issuance of the Convertible Notes 2015, 100% 2015, 2015 $52.06 $17,802 815 40, The purchased Capped Call allows the Co mpany to receive shares of its common stock and/or cash from counterparties equal to the amounts of common stock and/or cash related to the excess of the market price per share of the common stock, as measured under the terms of the Capped Call over the strike price of the Capped Call during the relevant valuation period. The purchased Capped Call is intended to reduce the potential dilution to common stock upon future conversion of the Convertible Notes 2015 $52.06 2015 The Capped Call is a separate transaction entere d into by the Company with the option counterparties, are not 2015 not 2015. In September 2016, $287,500 0.75% 2021 2016 and together with the Convertible Notes 2015, 2016 September 1, 2021, 2016 March 1 September 1 March 1, 2017. 17.7508 $1 2016, $56.34 2016 100% not Prior to the close of business on the business day immediately preceding March 1, 2021, may 2016 December 31, 2016 ( ’s common stock for at least 20 not 30 130% five five $1 2016, 98% March 1, 2021, second may may 2016 The Convertible Notes 2016 not ’s option prior to maturity. The Convertible Notes 2016 an indenture (Indenture 2016 2016 not 2016 2016 25% 2016 2016, may, 100% 2016 100% 2016 2016 2016 2016. December 31, 2017, none 2016 In accounting for the issuance of the Convertible Notes 2016, 2016 not 2016 2016 $287,500 of $216,775 $70,725. $7,689, $5,798 $1,891 December 31, 2017 $15,742, $2,154 $12,559 $1,029 December 31, 2016 $4,553, $651 $3,607 $295 In connection with the issuance of the Convertible Notes 2016, 2016 2016, 100% 2016, 2016 $73.03 $22,540 815 40, ’s Own Equity. The purchased Capped Call 2016 2016 2016 2016 2016 $73.03 2016 The Capped Call 2016 not 2016 not 2016.

Note 10 - Other Liabilities

Note 10 - Other Liabilities	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Other Liabilities Disclosure [Text Block]	10 . Other Liabilities Other current liabilities consist of the following: December 31, 201 7 201 6 Obligations under capital lease $ 539 $ 797 Intangible asset liability 16,892 14,688 Others 3,956 9,251 $ 21,387 $ 24,736 Other long-term liabilities consist of the following: December 31, 201 7 201 6 Deferred rent $ 1,487 $ 1,067 Income tax payable 830 1,554 Obligations under capital lease 857 1,633 Intangible asset liability 14,445 32,651 Deferred tax liabilities 6,146 27,371 Others 862 668 $ 24,627 $ 64,944

Note 11 - Income Taxes

Note 11 - Income Taxes	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Income Tax Disclosure [Text Block]	1 1 . Income Taxes Income (l oss) from continuing operations before income taxes consists of the following: Year Ended December 31, 201 7 2016 201 5 United States $ (77,649 ) $ (15,202 ) $ (5,642 ) Foreign (18,431 ) 26,658 (4,462 ) Total $ (96,080 ) $ 11,456 $ (10,104 ) Income tax provision consisted of the following: Year Ended December 31, 201 7 201 6 201 5 Current: U.S. Federal $ 96 $ 938 $ 5,272 U.S. State 51 (22 ) 187 Foreign 1,105 35 541 1,252 951 6,000 Deferred: U.S. Federal (11,312 ) (16,755 ) (114 ) U.S. State (613 ) — (15 ) Foreign (10,503 ) 747 (14 ) (22,428 ) (16,008 ) (143 ) Total $ (21,176 ) (15,057 ) $ 5,857 Income tax provision differed from the amounts computed by applying the U.S. federal income tax rate of 34% 2017, 2016 2015 Year Ended December 31, 2017 201 6 201 5 Expenses (benefit) at statutory rate $ (32,562 ) $ 3,895 $ (3,435 ) State income taxes (585 ) 222 (4 ) Research and development credits (12,983 ) (8,566 ) (8,526 ) Change in valuation allowance 40,028 9,768 12,748 Impact of foreign operations (1,951 ) (13,570 ) 2,652 Unrecognized tax benefits 3,596 3,151 3,044 Stock-based compensation (10,248 ) (9,925 ) 143 Prior year return to provision adjustment 1,105 (524 ) (392 ) Effect of U. S. tax law change (4,602 ) — — Impairment of intangibles (2,328 ) — — Other (646 ) 492 (373 ) $ (21,176 ) $ (15,057 ) $ 5,857 Significant components of the Company ’s net deferred taxes consist of the following: December 31, 201 7 201 6 Deferred tax assets Net operating loss carry forwards $ 34,366 $ 38,337 Research and development credits 62,118 46,492 Stock-based compensation 6,021 9,225 Accrued expenses and allowances 2,004 2,621 Amortization and depreciation 4,910 — Other temporary differences 4,018 3,088 Foreign tax credit 2,557 1,290 Valuation allowance (78,538 ) (38,631 ) Total deferred tax assets 37,456 62,422 Deferred tax liabilities Acquired intangible assets (26,602 ) (55,563 ) Acquired tangible assets (255 ) (3,629 ) Convertible debt (15,213 ) (30,177 ) Amortization and depreciation — (415 ) Other deferred tax liabilities (68 ) (9 ) Total deferred tax liabilities (42,138 ) (89,793 ) Deferred tax liabilities, net $ (4,682 ) $ (27,371 ) On December 22, 2017, was signed into law. The Tax Reform Act contains significant changes to U.S. federal corporate income taxation, including a reduction of the corporate tax rate from 35% 21% January 1, 2018, one 100% first $4,602 December 31, 2017 21%, Valuation Allowance The Company records a valuation allowance to reduce deferred tax assets to the amount that the Company believes is more likely than not may may not ’s ability to generate revenue, gross profits, operating income and taxable income in future periods. Amongst other factors, management must make assumptions regarding overall current and projected business and semiconductor industry conditions, operating efficiencies, the Company’s ability to timely develop, introduce and consistently manufacture new products to customers’ specifications, acceptance of new products, customer concentrations, technological change and the competitive environment which may December 31 2015, 2016. At December 31, 2015 2016, December 31, 2017, , United Kingdom, and the U.S., with the exception of the federal refundable AMT credit. The Company has a partial valuation allowance against the deferred tax assets of Taiwan. The valuation allowance increased (decreased) $39,907, $5,064 $6,115 December 31, 2017, 2016 2015, The net increase of $39,907 December 31, 2017 $134 $158 $39,931 . The net increase of $5,064 December 31, 2016 $16,044 $305 $3,088 $7,068 $10,647 $6,115 December 31, 2015 $18,383 $2,168 $767 $13,669 General Income Tax Disclosures The Company has net operating loss (“NOL”) carryforwards for federal and state income tax purposes of approximately $ 206,996 $88,680, December 31, 2017, 2022 2026 December 31, 2017, $2,790 2020, $7,038 not At December 31, 2017, $40,118 $42,248, 2024. 2021 not December 31, 2017, $9,457 $3,060, 2027, not Pursuant to Internal Revenue Code sections 382 383, ’s NOL and R&D credits generated prior to June 2004 two one December 2000 second June 2004, 382 383. not not The Company ’s NOL carryforwards include Cortina’s federal and state pre-acquisition NOL of $49,152 $3,919, 2024 2026 $46,601 $68,177, 2032 2028 $6,033 $7,977, 2027. 2021, not 382 383. No not not" The Company operates under tax holiday in Singapore . The Singapore tax holiday allows for a reduced income tax rate of 5% May 2020, 17%. December 31, 2017, 14% December 31, 2019, 35% $7,412 $6,216 December 31, 2017 2016, no December 31, 2015 not 0.18 0.14 December 31, 2017 2016, The following table summarizes the changes in gross unrecognized tax benefits: Year Ended December 31, 201 7 201 6 201 5 Balance as of January 1 $ 56,503 $ 46,453 $ 44,081 Increases based on tax positions related to the current year 4,656 5,450 4,459 Decreases based on tax positions of prior year (13,452 ) (1,766 ) (1,923 ) Gross increases for acquired unrecognized tax benefits — 6,585 — Statute of limitation expirations (101 ) (219 ) (164 ) Balance as of December 31 $ 47,606 $ 56,503 $ 46,453 As of December 31, 2017, $575 may $119 The Company recognizes interest and penalties related to unrecognized tax benefits as a component of income tax expense. The Company recorded $ 16 $119 December 31, 2017 2016, $113, $222 $163 December 31, 2017, 2016 2015, The Company files income tax returns in the U.S. federal jurisdiction, various states and certain foreign jurisdictions. The Company is no December 31, 2011 December 31, 2010. may The Tax Reform Act imposes a one federal income tax on accumulated foreign earnings and eliminates U.S. taxes on foreign subsidiary distribution. As a result, all previously deferred earnings of the foreign subsidiaries in the amount of $54,784 2017. no The Company is currently under examination by the Inland Revenue Authority of Singapore (“IRAS”) for the years 2010, 2011 2012. and did not As discussed in Note 1, 2016 16, , at the beginning of 2017. $1,217

Note 12 - Earnings Per Share

Note 12 - Earnings Per Share	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Earnings Per Share [Text Block]	1 2 . Earnings Per Share The following shows the reconciliation of weighted average shares used in the calculation of basic and diluted earnings per share: Year Ended December 31, 201 7 201 6 20 15 Denominator Weighted average common stock —basic 42,165,213 40,565,433 38,580,330 Effect of potentially dilutive securities: Add options to purchase common stock — 1,300,649 — Add unvested restricted stock unit — 2,158,260 — Add employee stock purchase plan — 8,240 — Add convertible debt — 92,299 — Weighted average common stock —diluted 42,165,213 44,124,881 38,580,330 The following securities were not Year Ended December 31, 201 7 201 6 201 5 Common stock options 1,456,610 — 2,563,230 Unvested restricted stock unit 2,935,500 284,871 4,672,806 Convertible debt 10,830,038 5,834,522 376,576 15,222,148 6,119,393 7,612,612 As discussed in Note 2, 2016 09 during the year ended December 31, 2016. no 993,720 December 31, 2016.

Note 13 - Stock-based Compensat

Note 13 - Stock-based Compensation	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	1 3 . Stock- Based Compensation In June 2010, ’s 2010 “2010 November 2010. 2010 2010 2010 December 31, 2017, 4,285,254 2010 Stock Option Awards The Company did not December 31, 201 7, 2016 2015. The following table summarizes information regarding options outstanding: Number of Shares Weighted Average Per Share Weighted Average Aggregate Intrinsic Outstanding at December 31, 2016 1,647,845 $ 10.86 4.28 $ 55,636 Exercised (300,982 ) 7.22 Outstanding at December 31, 2017 1,346,863 $ 11.67 3.26 $ 33,578 Exercisable at December 31, 2017 1,346,863 $ 11.67 3.26 $ 33,578 Vested as of December 31, 2017 1,346,863 $ 11.67 3.26 $ 33,578 The intrinsic value of options outstanding, exercisable and vested and expected to vest is calculated based on the difference between the exercise price and the fair value of the Company ’s common stock as of the respective balance sheet dates. The total intrinsic value of options exercised during the years ended December 31, 2017, 2016 2015 $11,312, $15,390, $10,696, $2,214, $5,748, $6,145, December 31, 2017, 2016 2015. Restricted Stock Units and Awards The Company granted restricted stock units (“RSUs”) to members of the Board and its employees. Most of the Company’s outstanding RSUs vest over four The following table summarizes information regarding outstanding restricted stock units : Number of Shares Weighted Average Fair Value P er Share Outstanding at December 31, 2016 4,448,630 $ 27.29 Granted 1,475,285 42.24 Vested (1,658,207 ) 22.39 Canceled (278,156 ) 32.63 Outstanding at December 31, 2017 3,987,552 $ 34.48 Expected to vest in the future as of December 31, 2017 3,888,697 The RSUs include performance-based stock units subject to achievement of pre-established revenue goal and earnings per share on non -GAAP basis. Once the goals are met, the performance-based stock units are subject to four December 31, 2017 101,193. December 31, 2017, 324,663. Employee Stock Purchase Plan In December 2011, may not 15% six February 10 August 10 85% six The ESPP imposes certain limitations upon an employee ’s right to acquire common stock, including the following: (i) no 5% no may $25 1,750,000. December 31, 2017, 2016 2015 171,099, 285,101, 326,764, The fair value of employee stock purchase plan is estimated at the start of offering period using the Black-Scholes option pricing model with the following average assumptions for the years ended December 31, 2017, 2016 2015: Year Ended December 31, 201 7 201 6 201 5 Risk-free interest rate 0.94 % 0.45 % 0.14 % Expected life (in years) 0.50 0.50 0.50 Dividend yield — — — Expected volatility 42 % 54 % 42 % Estimated fair value $ 11.03 $ 8.99 $ 5.77 Stock-Based Compensation Expense Stock-based compensation expense is included in the Company ’s results of operations as follows: Year Ended December 31, 201 7 201 6 201 5 Cost of revenue $ 2,045 $ 1,796 $ 1,359 Research and development 28,846 17,390 13,268 Sales and marketing 8,340 4,405 3,213 General and administrative 5,602 4,407 5,473 Discontinued operations — 2,194 4,980 $ 44,833 $ 30,192 $ 28,293 As of December 31, 201 7, $107,303, 2.75 The Company early adopted the new guidance on accounting for share-based payments to employees beginning January 1, 2016. $5,261 993,720 December 31, 2016. $4,305 December 31, 2015

Note 14 - Employee Benefit Plan

Note 14 - Employee Benefit Plan	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Compensation and Employee Benefit Plans [Text Block]	1 4 . Employee Benefit Plan The Company has established a 401 401 1986, may, $1,137 December 31, 2017. $2,625 December 31, 2016 2017. $1,131 December 31, 2015 2016.

Note 15 - Fair Value Measuremen

Note 15 - Fair Value Measurements	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Fair Value Disclosures [Text Block]	1 5 . Fair Value Measurements The guidance on fair value measurements requires fair value measurements to be classified and disclosed in one three Level 1 : Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities; Level 2 : Quoted prices in markets that are not Level 3 : Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no The Company measures its investments in marketable securities at fair value using the market approach which uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities. The Company has cash equivalents which consist of money market funds valued using the amortized cost method, in accordance with Rule 2a 7 1940 The convertible notes are carried on the Consolidated Balance Sheets at their original issuance value including accreted interest, net of unamortized debt discount and issuance cost. The Convertible Notes are not December 31, 201 7 2016, 2 The following table presents information about assets and liabilities required to be carried at fair value on a recurring basis: December 31, 201 7 Total Level 1 Level 2 Assets Cash equivalents: Money market funds $ 3,332 $ 31 $ 3,301 Municipal bonds 999 — 999 Corporate notes/bonds 2,608 — 2,608 Commercial paper 76,456 — 76,456 Investment in marketable securities: Municipal bonds 27,657 — 27,657 Corporate notes/bonds 146,401 — 146,401 Variable rate demand notes 3,500 — 3,500 Asset-backed securities 7,185 — 7,185 Commercial paper 56,994 — 56,994 $ 325,132 $ 31 $ 325,101 Liabilities Convertible Notes $ 555,200 $ — $ 555,200 December 31, 2016 Total Level 1 Level 2 Assets Cash equivalents: Money market funds $ 17,267 $ 10,110 $ 7,157 Investment in marketable securities: US treasury securities 4,000 4,000 — Municipal bonds 45,171 — 45,171 Corporate notes/bonds 112,205 — 112,205 Variable rate demand notes 58,930 — 58,930 Asset -backed securities 5,223 — 5,223 Commercial paper 23,947 — 23,947 $ 266,743 $ 14,110 $ 252,633 Liabilities Convertible Notes $ 616,831 $ — $ 616,831

Note 16 - Segment and Geographi

Note 16 - Segment and Geographic Information	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	1 6 . Segment and Geographic Information The Company operates in one may ’s principal offices. The following table sets forth the Company ’s revenue by geographic region: Year Ended December 31, 201 7 201 6 201 5 China $ 114,168 $ 103,071 $ 61,448 United States 92,620 29,976 34,605 Japan 29,061 36,308 24,410 Thailand 45,205 35,837 25,123 Other 67,147 61,085 47,124 $ 348,201 $ 266,277 $ 192,710 As of December 31, 201 7, $8,695 $4,647 December 31, 2016, $6,567 $5,068

Note 17 - Commitments and Conti

Note 17 - Commitments and Contingencies	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	1 7 . Commitments and Contingencies Leases The Company leases its facility under noncancelable lease agreements expiri ng in various years through 2026. Future minimum lease payments under noncancelable operating leases having initial terms in excess of one December 31, 201 7 201 8 $ 5,815 201 9 5,635 20 20 2,849 202 1 1,988 202 2 1,724 202 3 and thereafter 3,321 $ 21,332 For the years ended December 31, 2017, 2016 2015, $6,865, 13,870, $11,869, Noncancelable Purchase Obligations The Company depends upon third December 31, 2017, $7,299. December 31, 2017, $2,171 2018 $628. Legal Proceedings Netlist, Inc. v. Inphi Corporation, Case No. 09 6900 On September 22, 2009, No. 7,532,537. December 22, 2009, 7,619,912 7,636,274, No. 7,532,537, February 11, 2010 not 2010, inter partes 120 As to the proceeding at the USPTO, reexamination has been ordered for all of the patents that were alleged to infringe, and at present, the USPTO has determined that none No. 7,532,537 August 2, 2016 7,619,912 7,636,274. While the Company intends to defend the foregoing USPTO proceedings and lawsuit vigorously, the USPTO proceedings and litigation, whether or not Based on the nature of USPTO proceedings and litigation, the Company is currently unable to predict the final outcome of this lawsuit and therefore, cannot determine the likelihood of loss nor estimate a range of possible loss. However, because of the nature and inherent uncertainties of litigation, should the outcome of these actions be unfavorable, the Company’s business, financial condition, results of operations or cash flows could be materially and adversely affected. The Company may The Company is currently reviewing whether or not may In March 2015, $750 Based on the Agreement and Plan of Merger dated July 30, 2014, No. 1 September 25, 2014, $750. Indemnifications In the ordinary course of business, the Company may not ’s breach of such agreements, services to be provided by the Company, or from intellectual property infringement claims made by third may may not not no December 31, 2017 December 31, 2016.

Note 18 - Supplementary Financi

Note 18 - Supplementary Financial Information (Unaudited)	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Quarterly Financial Information [Text Block]	Supplementary Financial Information (Unaudited) Quarterly Results of Operations Year Ended December 31, 201 7 (2) Mar. 31, 201 7 Jun. 30, 7 Sept. 30, 7 (3) Dec. 31, 7 (4) (in thousands, except per share amounts) Total revenue $ 93,584 $ 84,423 $ 84,511 $ 85,683 Gross profit 53,513 47,835 42,071 53,084 Net income (loss) from continuing operations (11,273 ) (14,967 ) (48,766 ) 102 Net income (loss) (11,273 ) (14,967 ) (48,766 ) 102 Basic earnings per share (0.27 ) (0.36 ) (1.15 ) — Diluted earnings per share (0.27 ) (0.36 ) (1.15 ) — Year Ended December 31, 2016 (1) (2) Mar. 31, 201 6 Jun. 30, 6 Sept. 30, Dec. 31, 6 (in thousands, except per share amounts) Total revenue $ 54,091 $ 60,524 $ 70,750 $ 80,912 Gross profit 36,970 41,249 48,188 54,289 Net income (loss) from continuing operations (90 ) 943 6,596 19,064 Net income (loss) from discontinued operations 310 (412 ) 72,976 69 Net income (loss) 220 531 79,572 19,133 Basic earnings per share 0.01 0.01 1.95 0.46 Diluted earnings per share 0.01 0.01 1.80 0.42 ( 1 In August 2016, the Company completed the sale of its memory product business to Rambus Inc. As a result of the sale, the Company's consolidated financial statements for current and prior periods have been retrospectively reclassified to present the results of operations of the memory product business as discontinued operations. ( 2 On December 12, 2016 , the Company completed the acquisition of ClariPhy Communications Inc. for $303,661 December 12, 2016. ( 3 The Company abandon ed a project related to certain developed technology and in-process research and development from the ClariPhy acquisition which resulted to an impairment charge of $47,014. ( 4 The benefit for income taxes included revaluation of deferred tax liabilities to the new federal tax rate of 21%

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Basis of Presentation The accompanying consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) and include the accounts of Inphi, Cortina, ClariPhy and subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
Business Combinations Policy [Policy Text Block]	Business Combinations The Company accounts for acquisitions of business using the purchase method of accounting, which requires the Company to recognize separately from goodwill the assets acquired and the liabilities assumed at their acquisition date fair values. While the Company use s its best estimates and assumptions to accurately value assets acquired and liabilities assumed at the acquisition date as well as contingent consideration, where applicable, the estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may one may Accounting for business combinations requires management to make significant estimates and assumptions, especially at the acquisition date including the Company’s estimates for intangible assets, contractual obligations assumed and pre-acquisition contingencies where applicable. Although the Company believes the assumptions and estimates made in the past have been reasonable and appropriate, they are based in part on historical experience and information obtained from the management of the acquired companies and are inherently uncertain. Critical estimates in valuing certain of the intangible assets the Company acquired include future expected cash flows from product sales, customer contracts and acquired technologies, expected costs to develop in-process research and development (IPR&D) into commercially viable products and estimated cash flows from the projects when completed and discount rates. Unanticipated events and circumstances may may
Use of Estimates, Policy [Policy Text Block]	Use of Estimates The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. On an ongoing basis, management evaluates its estimates, including those related to (i) the collectibility of accounts receivable and allowance for distributors’ price discounts; (ii) write-down for excess and obsolete inventories; (iii) warranty obligations; (iv) the value assigned to and estimated useful lives of long-lived assets; (v) the realization of tax assets and estimates of tax liabilities and tax reserves; (vi) the valuation of equity securities; (vii) amounts recorded in connection with acquisitions; (viii) recoverability of intangible assets and goodwill; and (ix) the recognition and disclosure of fair value of convertible debt and contingent liabilities. These estimates are based on historical data and experience, as well as various other factors that management believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not third may
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Foreign Currency Translation The Company and its subsidiaries use the U.S. dollar as its functional currency. Foreign currency assets and liabilities are remeasured into U.S. dollars at the end-of-period exchange rates except for non-monetary assets and liabilities, which are remeasured at historical exchange rates. Revenue and expenses are remeasured at the exchange rate in effect during the period the transaction occurred, except for those expenses related to balance sheet amounts, which are remeasured at historical exchange rates. Gains or losses from foreign currency transactions are included in the Consolidated Statements of Income (Loss) as part of “Other income, net”. Foreign currency gain (loss) in 2017, 2016 2015 $22, $434 $524
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents The Company considers all highly liquid investments with an original or remaining maturity of three one may
Fair Value of Financial Instruments, Policy [Policy Text Block]	Fair Market Value of Financial Instruments The carrying amount reflected in the balance sheet for cash and cash equivalents, accounts receivable, prepaid and other current assets, accounts payable, accrued expenses and other current liabilities, approximate fair value due to the short-term nature of these financial instruments.
Investment, Policy [Policy Text Block]	Investments in Marketable Securities Investments in marketable securities consist of available-for-sale securities. These investments are recorded at fair value with changes in fair value, net of applicable taxes, recorded as unrealized gains (losses) as a component of accumulated other comprehensive income in stockholders' equity. Realized gains and losses are included in Other income, net. The cost basis for realized gains and losses on available-for-sale securities is determined on a specific identification basis. The Company periodically evaluate whether declines in fair values of our investments below their book values are other-than-temporary. When the fair value is lower than the amortized cost, the Company considers whether: ( 1 2 not 3 not not not not
Inventory, Policy [Policy Text Block]	Inventories Inventories are stated at the lower of cost or net realizable value . Cost is computed using standard cost, which approximates actual cost, on a first first not $3,133 $3,967 December 31, 2017 2016,
Property, Plant and Equipment, Policy [Policy Text Block]	Property and Equipment Property and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization is provided on property and equipment over the estimated useful lives on a straight-line basis. Leasehold improvements are amortized on a straight-line basis over the shorter of their estimated useful lives or lease terms. Repairs and maintenance are charged to expense as incurred. Useful lives by asset category are as follows: Asset Category Years Office equipment 3 Software 3 Leasehold improvements Shorter of lease term or estimated useful life Production equipment 2 Computer equipment 5 Lab equipment 5 Furniture and fixtures 7
Lessee, Leases [Policy Text Block]	Equipment Under Capital Leases The Company leases certain of its equipment under capital lease agreements. The assets and liabilities under capital leases are initially recorded at the fair value of the assets under lease. The capital lease obligation outstanding at December 31, 2017 and 2016 $1,396 $2,430,
Intangible Assets, Finite-Lived, Policy [Policy Text Block]	Intangible Assets Intangible assets represent rights acquired for developed technology, customer relationships , trademark, patents and IPR&D in connection with the business acquisitions. Intangible assets with finite useful lives are amortized over periods ranging from one ten
Goodwill and Intangible Assets, Policy [Policy Text Block]	Long-lived Assets The Company assesses the impairment of long-lived assets, which consist primarily of property and equipment and intangible assets, whenever events or changes in circumstances indicate that such assets might be impaired and the carrying value may not may ’s operating model or strategy and competitive forces. If events or changes in circumstances indicate that the carrying amount of an asset may not ’s carrying value over its fair value is recorded. Fair value is determined based on the present value of estimated expected future cash flows using a discount rate commensurate with the risk involved, quoted market prices or appraised values, depending on the nature of the assets.
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]	Goodwill Goodwill is recorded when the consideration paid for a business acquisition exceeds the fair value of net tangible and intangible assets acquired. Goodwill is measured and tested for impairment on an annual basis during the fourth To review for impairment, the Company first not not not no not no 2017, 2016 2015.
Internal Use Software, Policy [Policy Text Block]	Internal Use Software Costs Certain external computer software costs acquired for internal use are capitalized. Training costs and maintenance are expensed as incurred, while upgrades and enhancements are capitalized if it is probable that such expenditures will result in additional functionality. Capitalized costs are included within property and equipment. In 2016, not the Company should account for the arrangement as a service contract.
Revenue Recognition, Policy [Policy Text Block]	Revenue Recognition The Company ’s products are fully functional at the time of shipment and do not not Product revenue is recognized upon shipment of product to customers, net of accruals for estimated sales returns and allowances, which to date, have not Certain distributors may not The Company recognizes revenue from the sales and licensing of its intellectual property when the following fundamental criteria are met: (i) persuasive evidence of an arrangement exists, (ii) delivery has occurred, (iii) the sales price is fixed or determinable, and (iv) collection of resulting receivables is reasonably assured. Occasionally, the Company enters into development agreements with some of its customers and recognizes revenue from these agreements upon completion and acceptance by the customer of contract deliverables or as services are provided, depending on the terms of the arrangement. Revenue is deferred for any amounts billed or received prior to completion of milestones or delivery of services. Revenue from non-product sales was less than 3%, 1%, 2% December 31, 2017, 2016, 2015,
Cost of Sales, Policy [Policy Text Block]	Cost of Revenue Cost of revenue includes cost of materials, such as wafers processed by third ing and shipping, cost of personnel, including stock-based compensation, and equipment associated with manufacturing support, logistics and quality assurance, warranty cost, amortization and impairment of developed technology, amortization of step-up values of inventory, write-down of inventories, amortization of production mask costs, overhead and an allocated portion of occupancy costs.
Standard Product Warranty, Policy [Policy Text Block]	Warranty The Company ’s products are under warranty against defects in material and workmanship generally for a period of one two may December 31, 2017 2016, $110
Research and Development Expense, Policy [Policy Text Block]	Research and Development Expense Research and development expense consists of costs incurred in performing research and development activities including salaries, stock-based compensation, employee benefits, occupancy costs, pre-production engineering mask costs, impairment of in-process research and development, overhead costs and prototype wafer, packaging and test costs. Research and development costs are expensed as incurred. The Company enters into development agreements with some of the Company’s customers. Recoveries from nonrecurring engineering services from early stage technology are recorded as an offset to product development expense incurred in support of this effort and serve as a mechanism to partially recover development expenditures. These reimbursements are recognized upon completion and acceptance by the customer of contract deliverables or milestones. The Company recorded approximately $3,000, $2,400, $10,750 December 31, 2017, 2016 2015,
Selling and Marketing [Policy Text Block]	Sales and Marketing Expense Sales and marketing expense consists of salaries, stock-based compensation, employee benefits, travel , trade show costs, amortization of intangibles and others. The Company expenses sales and marketing costs as incurred. Advertising expenses for the years ended December 31, 2017, 2016 2015 not
Selling, General and Administrative Expenses, Policy [Policy Text Block]	General and Administrative Expense General and administrative expense consists of salaries, stock-based compensation, employee benefits and expenses for executive management, legal, finance and others. In addition, general and administrative expense includes fees for professional services and occupancy costs. These costs are expensed as incurred.
Income Tax, Policy [Policy Text Block]	Income Taxes Deferred tax assets and liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities, and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. The Company recognizes the deferred income tax effects of a change in tax rates in the period of enactment. The Company must also make judgments in evaluating whether deferred tax assets will be recovered from future taxable income. To the extent that it believes that recovery is not not not not” may may In accordance with FASB ’s guidance on Accounting for Uncertainty in Income Taxes, the Company performs a comprehensive review of uncertain tax positions regularly. In this regard, an uncertain tax position represents an expected treatment of a tax position taken in a filed tax return, or planned to be taken in a future tax return or claim, which has not not The Company recognizes potential interest and penalties on uncertain tax positions within provision (benefit) for income taxes on the consolidated statement of income. On December 22, 2017, the “Tax Reform Act”) was signed into law. The Tax Reform Act contains significant changes to U.S. federal corporate income taxation, including a reduction of the corporate tax rate from 35% 21% January 1, 2018, one 100% first 21%. December 2017, No. 118, 118 not one 11
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]	Stock-Based Compensation Stock-based compensation for stock option and restricted stock units issued to the Company’s employees is measured at the grant date based on the fair value of the award and is recognized as expense over the requisite service period, which is the vesting period, on a straight-line basis. The fair value of restricted stock units is based on the fair market value of the Company’s common stock on the date of grant. Historically, the Company granted stock options to employees and the Company uses the Black-Scholes option pricing model for valuing stock option awards granted to employees and directors at the grant date. Determining the fair value of stock option awards at the grant date requires the input of various assumptions, including fair value of the underlying common stock, expected future share price volatility, expected term, risk-free interest rate and dividend rate. Changes in these assumptions can materially affect the fair value of the options. The Company based its estimate of expected volatility on the estimated volatility of similar entities whose share prices are publicly available. The risk-free interest rate is based on the U.S. Treasury yields in effect at the time of grant for periods corresponding to the expected life of the options. The weighted average expected life of options was calculated using the simplified method. This decision was based on the lack of relevant historical data due to the Company’s limited experience. The expected dividend yield is zero not no The Company has elected to treat share-based payment awards with graded vesting schedules and time-based service conditions as single awards and recognizes stock-based compensation expense on a straight-line basis (net of estimated forfeitures) over the requisite service period. The Company recognizes non-employee stock-based compensation expenses based on the estimated fair value of the equity instrument determined using the Black-Scholes option pricing model. Management believes that the fair value of the stock options is more reliably measured than the fair value of the services received. The fair value of each non-employee variable stock award is re-measured each period until a commitment date is reached, which is generally the vesting date.
Earnings Per Share, Policy [Policy Text Block]	Earnings per Share Basic earnings per share is calculated by dividing income allocable to common stockholders by the weighted average number of shares of common stock outstanding during the period. Diluted earnings per share is calculated by dividing the net income allocable to common stockholders by the weighted average number of common shares outstanding, adjusted for the effects of potentially dilutive common stock, which are comprised of stock options, restricted stock units, employee share purchase plan and the shares that could be issued upon conversion of the Company’s convertible debt. The capped call options in connection with the issuance of the convertible notes are excluded from the calculation of diluted earnings per share as their impact is always anti-dilutive.
Segment Reporting, Policy [Policy Text Block]	Segment Information The Company operates in one reporting segment related to the design, development and sale of high-speed analog connectivity components that operate to maintain, amplify and improve signal integrity at high-speeds in a wide variety of applications. The Company’s chief operating decision-maker is its Chief Executive Officer, who reviews operating results on an aggregate basis and manages the Company’s operations as a single operating segment.
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements In May 2014, five The FASB issued several updates to the guidance. The Company will adopt the new revenue guidance effective January 1, 2018, not Upon adoption, the Company will recognize the cumulative effect of adopting this guidance as an adjustment to the opening balance of retained earnings which is not not The Company expects the adoption of this guidance will not In July 2015, January 1, 2017. The adoption of this standard did not In January 2016, may not ’s other deferred tax assets. The guidance is applied by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption and is effective for the Company in its first 2018. The Company expects the adoption of this guidance will not In February 2016, 12 January 1, 2019. In March 2016, s the requirement that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods that the investment had been held. The guidance requires that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor’s previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting. Therefore, upon qualifying for the equity method of accounting, no January 1, 2017. not In August 2016, 2018, The Company expects the adoption of this guidance will not In October 2016, 2018, 11 In January 2017, 2018. not In January 2017, 2 2 ’s goodwill with the carrying amount of that goodwill. The new guidance requires an entity to compare the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. The new guidance becomes effective for goodwill impairment tests in fiscal years beginning after December 15, 2019, In May 2017, s. The guidance will be effective for calendar year-end beginning after December 15, 2017. not

Note 1 - Organization and Sum28

Note 1 - Organization and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Estimated Useful Lives of Long-lived Assets [Table Text Block]	Asset Category Years Office equipment 3 Software 3 Leasehold improvements Shorter of lease term or estimated useful life Production equipment 2 Computer equipment 5 Lab equipment 5 Furniture and fixtures 7

Note 2 - Acquisitions (Tables)

Note 2 - Acquisitions (Tables) - ClariPhy Communications Inc.[Member]	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	Preliminary Allocation Allocation Adjustments Final Allocation Cash $ 7,417 $ — $ 7,417 Receivables 2,552 602 3,154 Inventories 13,774 — 13,774 Other current assets 2,739 (123 ) 2,616 Property and equipment 6,163 — 6,163 Identifiable intangible assets 138,558 — 138,558 In-process research and development 97,340 — 97,340 Other noncurrent assets 753 — 753 Accounts payable, accrued expenses and other current liabilities (13,667 ) 2 (13,665 ) Deferred tax liabilities, noncurrent (42,958 ) 94 (42,864 ) Other liabilities (5,647 ) — (5,647 ) Total identifiable net assets 207,024 575 207,599 Goodwill 96,637 (575 ) 96,062 Net assets acquired $ 303,661 $ — $ 303,661
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]	Estimated Fair Value Estimated Useful Life (Years) Developed technology $ 66,450 1-6 Customer relationships 62,370 7 Trade name 1,390 5 Software 8,348 1-3 In-process research and development 97,340 — $ 235,898
Schedule of Acquired in Process Research and Development [Table Text Block]	Description IPR&D Percentage of Completion Estimated Cost to Complete Expected Release Date M200 $ 60,500 67 % $ 12,064 2018 Lightspeed III 36,840 26 % 39,176 2019
Business Acquisition, Pro Forma Information [Table Text Block]	Pro Forma 6 Pro Forma Year Ended 5 (unaudited) (unaudited) Revenue $ 304,820 $ 228,040 Net income (loss) $ 48,481 $ (48,356 ) Earnings per share – basic $ 1.20 $ (1.25 ) Earnings per share – diluted $ 1.10 $ (1.25 )

Note 3 - Discontinued Operati30

Note 3 - Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Disposal Groups, Schedule of Gain (Loss) from Sale of Business [Table Text Block]	Cash proceeds from sale $ 90,000 Less book value of assets sold: Inventories (5,947 ) Prepaid expenses (250 ) Property and equipment (7,051 ) Goodwill (714 ) Deferred revenue 1,757 Liabilities 749 Gain on sale $ 78,544
Schedule of Results from Discontinued Operations [Table Text Block]	Year Ended December 31, 2016 2015 Revenue $ 24,418 $ 53,906 Cost of revenue (13,367 ) (25,600 ) Operating expenses (15,029 ) (23,771 ) Other income 176 — Gain on sale 78,544 — Provision for income taxes (1,799 ) (2,125 ) Net income from discontinued operations $ 72,943 $ 2,410 Year Ended December 31, 2016 2015 Depreciation and amortization $ 1,103 $ 2,044 Stock-based compensation expense 2,194 4,980 Property and equipment expenditures 2,455 2,265

Note 4 - Investments (Tables)

Note 4 - Investments (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Available-for-sale Securities [Table Text Block]	December 31, 201 7 Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value Available-for-sale securities: Municipal bonds $ 27,725 $ — $ (68 ) $ 27,657 Corporate notes/bonds 146,549 49 (197 ) 146,401 Variable rate demand notes 3,500 — — 3,500 Asset -backed securities 7,197 — (12 ) 7,185 Commercial paper 57,006 1 (13 ) 56,994 Total investments $ 241,977 $ 50 $ (290 ) $ 241,737 December 31, 201 6 Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value Available-for-sale securities: US treasury securities $ 3,999 $ 1 $ — $ 4,000 Municipal bonds 45,289 3 (121 ) 45,171 Corporate notes/bonds 112,330 36 (161 ) 112,205 Variable rate demand notes 58,930 — — 58,930 Asset-backed securities 5,221 2 — 5,223 Commercial paper 23,945 2 — 23,947 Total investments $ 249,714 $ 44 $ (282 ) $ 249,476
Investments Classified by Contractual Maturity Date [Table Text Block]	Cost Fair Value Due in one year or less $ 172,561 $ 172,443 Due between one and five years 65,916 65,794 Due after five years 3,500 3,500 $ 241,977 $ 241,737

Note 5 - Concentrations (Tables

Note 5 - Concentrations (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]	December 31, Accounts Receivable 201 7 201 6 Customer A 29 % * Customer B 14 * Customer C 13 22 % Customer D * 13 Year Ended December 31, Revenue 201 7 201 6 201 5 Customer A 12 % * * Customer B * * * Customer C 12 13 % *

Note 6 - Inventories (Tables)

Note 6 - Inventories (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Inventory, Current [Table Text Block]	December 31, 201 7 2016 Raw materials $ 12,267 $ 1,648 Work in process 13,800 15,999 Finished goods 5,654 14,392 $ 31,721 $ 32,039

Note 7 - Property and Equipme34

Note 7 - Property and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Property, Plant and Equipment [Table Text Block]	December 31, 201 7 201 6 Laboratory and production equipment $ 94,609 $ 64,402 Office, software and computer equipment 28,594 25,248 Furniture and fixtures 1,698 1,396 Leasehold improvements 7,250 6,707 132,151 97,753 Less accumulated depreciation (71,807 ) (53,282 ) $ 60,344 $ 44,471
Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]	201 8 $ 662 201 9 504 20 20 364 202 1 93 Total minimum lease payments 1,623 Less: Amount representing interest 227 Minimum lease payments, net of interest $ 1,396

Note 8 - Goodwill and Identif35

Note 8 - Goodwill and Identifiable Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Finite-Lived Intangible Assets [Table Text Block]	December 31, 201 7 December 31, 201 6 Gross Accumulated Amortization Net Gross Accumulated Amortization Net Developed technology $ 126,300 $ 53,533 $ 72,767 $ 138,020 $ 26,579 $ 111,441 Customer relationships 70,540 11,954 58,586 70,540 2,227 68,313 Trade name 2,310 888 1,422 2,310 426 1,884 Patents 1,579 734 845 1,579 552 1,027 Software 47,039 18,226 28,813 47,394 336 47,058 In-process research and development 60,500 — 60,500 97,340 — 97,340 $ 308,268 $ 85,335 $ 222,933 $ 357,183 $ 30,120 $ 327,063
Finite-lived Intangible Assets Amortization Expense [Table Text Block]	Year Ended December 31, 2017 2016 2015 Cost of revenue $ 28,502 $ 12,223 $ 11,499 Research and development 18,352 336 — Sales and marketing 9,727 1,209 817 General and administrative 643 402 418 $ 57,224 $ 14,170 $ 12,734
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	201 8 $ 52,367 201 9 48,619 20 20 21,118 202 1 17,919 202 2 12,161 Thereafter 10,249 $ 162,433
Finite Lived Intangible Assets Remaining Amortization Period [Table Text Block]	Developed technology 3.1 Customer relationship 6.0 Trade name 3.5 Patents 8.9 Software 1.9

Note 10 - Other Liabilities (Ta

Note 10 - Other Liabilities (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Other Current Liabilities [Table Text Block]	December 31, 201 7 201 6 Obligations under capital lease $ 539 $ 797 Intangible asset liability 16,892 14,688 Others 3,956 9,251 $ 21,387 $ 24,736
Other Noncurrent Liabilities [Table Text Block]	December 31, 201 7 201 6 Deferred rent $ 1,487 $ 1,067 Income tax payable 830 1,554 Obligations under capital lease 857 1,633 Intangible asset liability 14,445 32,651 Deferred tax liabilities 6,146 27,371 Others 862 668 $ 24,627 $ 64,944

Note 11 - Income Taxes (Tables)

Note 11 - Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]	Year Ended December 31, 201 7 2016 201 5 United States $ (77,649 ) $ (15,202 ) $ (5,642 ) Foreign (18,431 ) 26,658 (4,462 ) Total $ (96,080 ) $ 11,456 $ (10,104 )
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	Year Ended December 31, 201 7 201 6 201 5 Current: U.S. Federal $ 96 $ 938 $ 5,272 U.S. State 51 (22 ) 187 Foreign 1,105 35 541 1,252 951 6,000 Deferred: U.S. Federal (11,312 ) (16,755 ) (114 ) U.S. State (613 ) — (15 ) Foreign (10,503 ) 747 (14 ) (22,428 ) (16,008 ) (143 ) Total $ (21,176 ) (15,057 ) $ 5,857
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Year Ended December 31, 2017 201 6 201 5 Expenses (benefit) at statutory rate $ (32,562 ) $ 3,895 $ (3,435 ) State income taxes (585 ) 222 (4 ) Research and development credits (12,983 ) (8,566 ) (8,526 ) Change in valuation allowance 40,028 9,768 12,748 Impact of foreign operations (1,951 ) (13,570 ) 2,652 Unrecognized tax benefits 3,596 3,151 3,044 Stock-based compensation (10,248 ) (9,925 ) 143 Prior year return to provision adjustment 1,105 (524 ) (392 ) Effect of U. S. tax law change (4,602 ) — — Impairment of intangibles (2,328 ) — — Other (646 ) 492 (373 ) $ (21,176 ) $ (15,057 ) $ 5,857
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	December 31, 201 7 201 6 Deferred tax assets Net operating loss carry forwards $ 34,366 $ 38,337 Research and development credits 62,118 46,492 Stock-based compensation 6,021 9,225 Accrued expenses and allowances 2,004 2,621 Amortization and depreciation 4,910 — Other temporary differences 4,018 3,088 Foreign tax credit 2,557 1,290 Valuation allowance (78,538 ) (38,631 ) Total deferred tax assets 37,456 62,422 Deferred tax liabilities Acquired intangible assets (26,602 ) (55,563 ) Acquired tangible assets (255 ) (3,629 ) Convertible debt (15,213 ) (30,177 ) Amortization and depreciation — (415 ) Other deferred tax liabilities (68 ) (9 ) Total deferred tax liabilities (42,138 ) (89,793 ) Deferred tax liabilities, net $ (4,682 ) $ (27,371 )
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	Year Ended December 31, 201 7 201 6 201 5 Balance as of January 1 $ 56,503 $ 46,453 $ 44,081 Increases based on tax positions related to the current year 4,656 5,450 4,459 Decreases based on tax positions of prior year (13,452 ) (1,766 ) (1,923 ) Gross increases for acquired unrecognized tax benefits — 6,585 — Statute of limitation expirations (101 ) (219 ) (164 ) Balance as of December 31 $ 47,606 $ 56,503 $ 46,453

Note 12 - Earnings Per Share (T

Note 12 - Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Weighted Average Number of Shares [Table Text Block]	Year Ended December 31, 201 7 201 6 20 15 Denominator Weighted average common stock —basic 42,165,213 40,565,433 38,580,330 Effect of potentially dilutive securities: Add options to purchase common stock — 1,300,649 — Add unvested restricted stock unit — 2,158,260 — Add employee stock purchase plan — 8,240 — Add convertible debt — 92,299 — Weighted average common stock —diluted 42,165,213 44,124,881 38,580,330
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	Year Ended December 31, 201 7 201 6 201 5 Common stock options 1,456,610 — 2,563,230 Unvested restricted stock unit 2,935,500 284,871 4,672,806 Convertible debt 10,830,038 5,834,522 376,576 15,222,148 6,119,393 7,612,612

Note 13 - Stock-based Compens39

Note 13 - Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Share-based Compensation, Stock Options, Activity [Table Text Block]	Number of Shares Weighted Average Per Share Weighted Average Aggregate Intrinsic Outstanding at December 31, 2016 1,647,845 $ 10.86 4.28 $ 55,636 Exercised (300,982 ) 7.22 Outstanding at December 31, 2017 1,346,863 $ 11.67 3.26 $ 33,578 Exercisable at December 31, 2017 1,346,863 $ 11.67 3.26 $ 33,578 Vested as of December 31, 2017 1,346,863 $ 11.67 3.26 $ 33,578
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]	Number of Shares Weighted Average Fair Value P er Share Outstanding at December 31, 2016 4,448,630 $ 27.29 Granted 1,475,285 42.24 Vested (1,658,207 ) 22.39 Canceled (278,156 ) 32.63 Outstanding at December 31, 2017 3,987,552 $ 34.48 Expected to vest in the future as of December 31, 2017 3,888,697
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]	Year Ended December 31, 201 7 201 6 201 5 Risk-free interest rate 0.94 % 0.45 % 0.14 % Expected life (in years) 0.50 0.50 0.50 Dividend yield — — — Expected volatility 42 % 54 % 42 % Estimated fair value $ 11.03 $ 8.99 $ 5.77
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]	Year Ended December 31, 201 7 201 6 201 5 Cost of revenue $ 2,045 $ 1,796 $ 1,359 Research and development 28,846 17,390 13,268 Sales and marketing 8,340 4,405 3,213 General and administrative 5,602 4,407 5,473 Discontinued operations — 2,194 4,980 $ 44,833 $ 30,192 $ 28,293

Note 15 - Fair Value Measurem40

Note 15 - Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	December 31, 201 7 Total Level 1 Level 2 Assets Cash equivalents: Money market funds $ 3,332 $ 31 $ 3,301 Municipal bonds 999 — 999 Corporate notes/bonds 2,608 — 2,608 Commercial paper 76,456 — 76,456 Investment in marketable securities: Municipal bonds 27,657 — 27,657 Corporate notes/bonds 146,401 — 146,401 Variable rate demand notes 3,500 — 3,500 Asset-backed securities 7,185 — 7,185 Commercial paper 56,994 — 56,994 $ 325,132 $ 31 $ 325,101 Liabilities Convertible Notes $ 555,200 $ — $ 555,200 December 31, 2016 Total Level 1 Level 2 Assets Cash equivalents: Money market funds $ 17,267 $ 10,110 $ 7,157 Investment in marketable securities: US treasury securities 4,000 4,000 — Municipal bonds 45,171 — 45,171 Corporate notes/bonds 112,205 — 112,205 Variable rate demand notes 58,930 — 58,930 Asset -backed securities 5,223 — 5,223 Commercial paper 23,947 — 23,947 $ 266,743 $ 14,110 $ 252,633 Liabilities Convertible Notes $ 616,831 $ — $ 616,831

Note 16 - Segment and Geograp41

Note 16 - Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Revenue from External Customers by Geographic Areas [Table Text Block]	Year Ended December 31, 201 7 201 6 201 5 China $ 114,168 $ 103,071 $ 61,448 United States 92,620 29,976 34,605 Japan 29,061 36,308 24,410 Thailand 45,205 35,837 25,123 Other 67,147 61,085 47,124 $ 348,201 $ 266,277 $ 192,710

Note 17 - Commitments and Con42

Note 17 - Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	December 31, 201 7 201 8 $ 5,815 201 9 5,635 20 20 2,849 202 1 1,988 202 2 1,724 202 3 and thereafter 3,321 $ 21,332

Note 18 - Supplementary Finan43

Note 18 - Supplementary Financial Information (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Quarterly Financial Information [Table Text Block]	Year Ended December 31, 201 7 (2) Mar. 31, 201 7 Jun. 30, 7 Sept. 30, 7 (3) Dec. 31, 7 (4) (in thousands, except per share amounts) Total revenue $ 93,584 $ 84,423 $ 84,511 $ 85,683 Gross profit 53,513 47,835 42,071 53,084 Net income (loss) from continuing operations (11,273 ) (14,967 ) (48,766 ) 102 Net income (loss) (11,273 ) (14,967 ) (48,766 ) 102 Basic earnings per share (0.27 ) (0.36 ) (1.15 ) — Diluted earnings per share (0.27 ) (0.36 ) (1.15 ) — Year Ended December 31, 2016 (1) (2) Mar. 31, 201 6 Jun. 30, 6 Sept. 30, Dec. 31, 6 (in thousands, except per share amounts) Total revenue $ 54,091 $ 60,524 $ 70,750 $ 80,912 Gross profit 36,970 41,249 48,188 54,289 Net income (loss) from continuing operations (90 ) 943 6,596 19,064 Net income (loss) from discontinued operations 310 (412 ) 72,976 69 Net income (loss) 220 531 79,572 19,133 Basic earnings per share 0.01 0.01 1.95 0.46 Diluted earnings per share 0.01 0.01 1.80 0.42

Note 1 - Organization and Sum44

Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	Dec. 12, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Aug. 04, 2016
Foreign Currency Transaction Gain (Loss), before Tax			$ 22	$ (434)	$ (524)
Inventory Valuation Reserves			3,133	3,967
Capital Lease Obligations			1,396	2,430
Goodwill, Impairment Loss			0	0	0
Standard and Extended Product Warranty Accrual			110	110
Reimbursements from Research and Development Contracts			$ 3,000	$ 2,400	$ 10,750
Effective Income Tax Rate Reconciliation, at Highest Federal Statutory Income Tax Rate, Percent			35.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			34.00%	34.00%	34.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Payments			$ 0
Number of Reportable Segments			1
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%
Licenses for Intellectual Property [Member]
Percent of Revenue From Nonproduct Sales			3.00%	1.00%	2.00%
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life			1 year
Product Warranty Term			1 year
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life			10 years
Product Warranty Term			2 years
ClariPhy Communications Inc.[Member]
Payments to Acquire Businesses, Gross	$ 303,661
Memory Product Business [Member] | Discontinued Operations, Held-for-sale [Member] | Rambus Inc. [Member]
Disposal Group, Including Discontinued Operation, Consideration						$ 90,000

Note 1 - Organization and Sum45

Note 1 - Organization and Summary of Significant Accounting Policies - Useful Lives by Asset Category (Details)	12 Months Ended
	Dec. 31, 2017
Office Equipment [Member]
Estimated useful life (Year)	3 years
Software and Software Development Costs [Member]
Estimated useful life (Year)	3 years
Equipment [Member]
Estimated useful life (Year)	2 years
Computer Equipment [Member]
Estimated useful life (Year)	5 years
Lab Equipment [Member]
Estimated useful life (Year)	5 years
Furniture and Fixtures [Member]
Estimated useful life (Year)	7 years

Note 2 - Acquisitions (Details

Note 2 - Acquisitions (Details Textual) - USD ($) $ in Thousands	Dec. 12, 2016	Dec. 31, 2016	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Impairment of Intangible Assets (Excluding Goodwill)				$ 47,014		$ 1,750
ClariPhy Communications Inc.[Member]
Payments to Acquire Businesses, Gross	$ 303,661
Amount Held in Escrow as Security for Indemnification	$ 30,000
Business Combination, Maximum Period Consideration will be Held in Escrow Fund	2 years
Impairment of Intangible Assets (Excluding Goodwill)			$ 47,014	47,014
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual		$ 1,128
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual		$ 2,361
ClariPhy Communications Inc.[Member] | Cost of Sales [Member]
Impairment of Intangible Assets (Excluding Goodwill)				10,174
ClariPhy Communications Inc.[Member] | Research and Development Expense [Member]
Impairment of Intangible Assets (Excluding Goodwill)				$ 36,840
ClariPhy Communications Inc.[Member] | General and Administrative Expense [Member]
Business Combination, Acquisition Related Costs					$ 1,738
ClariPhy Communications Inc.[Member] | Minimum [Member]
Fair Value Inputs, Discount Rate	17.00%
ClariPhy Communications Inc.[Member] | Maximum [Member]
Fair Value Inputs, Discount Rate	20.00%
ClariPhy Communications Inc.[Member] | In Process Research and Development [Member]
Research and Development in Process	$ 97,340

Note 2 - Acquisitions - Summary

Note 2 - Acquisitions - Summary of the Clariphy Acquisition Preliminary Purchase Price Allocation (Details) - USD ($) $ in Thousands	1 Months Ended
	Dec. 31, 2016	Dec. 31, 2017	Dec. 12, 2016
Goodwill	$ 105,077	$ 104,502
ClariPhy Communications Inc.[Member]
Cash	7,417		$ 7,417
Receivables	3,154		2,552
Receivables	602
Inventories	13,774		13,774
Other current assets	2,616		2,739
Other current assets	(123)
Property and equipment	6,163		6,163
Identifiable intangible assets	138,558		138,558
In-process research and development	97,340		97,340
Other noncurrent assets	753		753
Accounts payable, accrued expenses and other current liabilities	(13,665)		(13,667)
Accounts payable, accrued expenses and other current liabilities	2
Deferred tax liabilities, noncurrent	(42,864)		(42,958)
Deferred tax liabilities, noncurrent	94
Other liabilities	(5,647)		(5,647)
Total identifiable net assets	207,599		207,024
Total identifiable net assets	575
Goodwill	96,062		96,637
Goodwill	(575)
Net assets acquired	$ 303,661		$ 303,661

Note 2 - Acquisitions - Summa48

Note 2 - Acquisitions - Summary of the Estimated Fair Value of Intangible Assets and Their Estimated Useful Lives From the ClariPhy Acquisition (Details) - USD ($) $ in Thousands	Dec. 12, 2016	Dec. 31, 2017
Minimum [Member]
Finite-lived intangible assets acquired, estimated useful life (Year)		1 year
Maximum [Member]
Finite-lived intangible assets acquired, estimated useful life (Year)		10 years
ClariPhy Communications Inc.[Member]
Intangible assets acquired, estimated fair value	$ 235,898
ClariPhy Communications Inc.[Member] | Current In Process Research and Development [Member]
Indefinite-lived intangible assets acquired, estimated fair value	97,340
ClariPhy Communications Inc.[Member] | Developed Technology Rights [Member]
Finite-lived intangible assets acquired, estimated fair value	$ 66,450
ClariPhy Communications Inc.[Member] | Developed Technology Rights [Member] | Minimum [Member]
Finite-lived intangible assets acquired, estimated useful life (Year)	1 year
ClariPhy Communications Inc.[Member] | Developed Technology Rights [Member] | Maximum [Member]
Finite-lived intangible assets acquired, estimated useful life (Year)	6 years
ClariPhy Communications Inc.[Member] | Customer Relationships [Member]
Finite-lived intangible assets acquired, estimated fair value	$ 62,370
Finite-lived intangible assets acquired, estimated useful life (Year)	7 years
ClariPhy Communications Inc.[Member] | Trade Names [Member]
Finite-lived intangible assets acquired, estimated fair value	$ 1,390
Finite-lived intangible assets acquired, estimated useful life (Year)	5 years
ClariPhy Communications Inc.[Member] | Computer Software, Intangible Asset [Member]
Finite-lived intangible assets acquired, estimated fair value	$ 8,348
ClariPhy Communications Inc.[Member] | Computer Software, Intangible Asset [Member] | Minimum [Member]
Finite-lived intangible assets acquired, estimated useful life (Year)	1 year
ClariPhy Communications Inc.[Member] | Computer Software, Intangible Asset [Member] | Maximum [Member]
Finite-lived intangible assets acquired, estimated useful life (Year)	3 years

Note 2 - Acquisitions - In Proc

Note 2 - Acquisitions - In Process Research and Development Acquired From ClariPhy (Details) - ClariPhy Communications Inc.[Member] - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 12, 2016
In-process research and development acquired	$ 97,340	$ 97,340
M200 [Member]
In-process research and development acquired		$ 60,500
Percentage of completion		67.00%
Estimated cost to complete		$ 12,064
Lightspeed III [Member]
In-process research and development acquired		$ 36,840
Percentage of completion		26.00%
Estimated cost to complete		$ 39,176

Note 2 - Acquisitions - Unaudit

Note 2 - Acquisitions - Unaudited Pro Forma Summary of Consolidated Results of Operations for the ClariPhy Acquisition (Details) - ClariPhy Communications Inc.[Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Revenue	$ 304,820	$ 228,040
Net income (loss)	$ 48,481	$ (48,356)
Earnings per share – basic (in dollars per share)	$ 1.20	$ (1.25)
Earnings per share – diluted (in dollars per share)	$ 1.10	$ (1.25)

Note 3 - Discontinued Operati51

Note 3 - Discontinued Operations (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Sep. 04, 2016
Proceeds from Divestiture of Businesses	$ 10,690	$ 78,750
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax		78,544
Memory Product Business [Member] | Discontinued Operations, Held-for-sale [Member] | Rambus Inc. [Member]
Disposal Group, Including Discontinued Operation, Consideration				$ 90,000
Amount Held in Escrow as Security for Indemnification				$ 11,250
Proceeds from Divestiture of Businesses	$ 10,690
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax		$ 78,544
Transition Service Agreement, Term		180 days
Amount Billed Related to Transition Agreement		$ 1,563

Note 3 - Discontinued Operati52

Note 3 - Discontinued Operations - Components of Gain on Sale (Details) - USD ($) $ in Thousands	Aug. 04, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax			$ 78,544
Memory Product Business [Member] | Discontinued Operations, Disposed of by Sale [Member]
Cash proceeds from sale	$ 90,000
Inventories	(5,947)
Prepaid expenses	(250)
Property and equipment	(7,051)
Goodwill	(714)
Deferred revenue	1,757
Liabilities	749
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	$ 78,544

Note 3 - Discontinued Operati53

Note 3 - Discontinued Operations - Results of Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	[1],[2]	Sep. 30, 2016	[1],[2]	Jun. 30, 2016	[1],[2]	Mar. 31, 2016	[1],[2]	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue										$ 24,418	$ 53,906
Cost of revenue										(13,367)	(25,600)
Operating expenses										(15,029)	(23,771)
Other income										176
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax										78,544
Provision for income taxes										(1,799)	(2,125)
Net income from discontinued operations	$ 69		$ 72,976		$ (412)		$ 310			72,943	2,410
Depreciation and amortization, discontinued operations										1,103	2,044
Stock-based compensation expense										2,194	4,980
Property and equipment expenditures										$ 2,455	$ 2,265
[1]	In August 2016, the Company completed the sale of its memory product business to Rambus Inc. As a result of the sale, the Company's consolidated financial statements for current and prior periods have been retrospectively reclassified to present the results of operations of the memory product business as discontinued operations.
[2]	On December 12, 2016, the Company completed the acquisition of ClariPhy Communications Inc. for $303,661 in cash. The revenue and expenses of ClariPhy are included in the consolidated statement of income from December 12, 2016.

Note 4 - Investments (Details T

Note 4 - Investments (Details Textual) $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2016USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		102
Cost-method Investments, Other than Temporary Impairment		$ 0	$ 0
Other Income [Member]
Cost-method Investments, Realized Gains			1,138
Other Assets [Member]
Cost Method Investments		$ 10,000	10,000
Minority Interest in Early Stage Private Company [Member]
Cost Method Investments, Original Cost			$ 8,000
Cost Method Investments, Amount Sold	$ 8,759
Amount Held in Escrow Related to Cost Method Investments Sold	$ 2,414
Minority Interest in Early Stage Private Company [Member] | Maximum [Member]
Ownership Percentage in Cost Method Investment			10.00%

Note 4 - Investments - Summary

Note 4 - Investments - Summary of Investments by Investment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Available-for-sale securities, amortized cost	$ 241,977	$ 249,714
Available-for-sale securities, gross unrealized gain	50	44
Available-for-sale securities, gross unrealized loss	(290)	(282)
Available-for-sale securities, fair value	241,737	249,476
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale securities, amortized cost	27,725	45,289
Available-for-sale securities, gross unrealized gain		3
Available-for-sale securities, gross unrealized loss	(68)	(121)
Available-for-sale securities, fair value	27,657	45,171
US Treasury Securities [Member]
Available-for-sale securities, amortized cost		3,999
Available-for-sale securities, gross unrealized gain		1
Available-for-sale securities, gross unrealized loss
Available-for-sale securities, fair value		4,000
Corporate Debt Securities [Member]
Available-for-sale securities, amortized cost	146,549	112,330
Available-for-sale securities, gross unrealized gain	49	36
Available-for-sale securities, gross unrealized loss	(197)	(161)
Available-for-sale securities, fair value	146,401	112,205
Variable Rate Demand Note [Member]
Available-for-sale securities, amortized cost	3,500	58,930
Available-for-sale securities, gross unrealized gain
Available-for-sale securities, gross unrealized loss
Available-for-sale securities, fair value	3,500	58,930
Asset-backed Securities [Member]
Available-for-sale securities, amortized cost	7,197	5,221
Available-for-sale securities, gross unrealized gain		2
Available-for-sale securities, gross unrealized loss	(12)
Available-for-sale securities, fair value	7,185	5,223
Commercial Paper [Member]
Available-for-sale securities, amortized cost	57,006	23,945
Available-for-sale securities, gross unrealized gain	1	2
Available-for-sale securities, gross unrealized loss	(13)
Available-for-sale securities, fair value	$ 56,994	$ 23,947

Note 4 - Investments - Contract

Note 4 - Investments - Contractual Maturities of Available-for-sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Due in one year or less, cost	$ 172,561
Due in one year or less, fair value	172,443
Due between one and five years, cost	65,916
Due between one and five years, fair value	65,794
Due after five years, cost	3,500
Due after five years, fair value	3,500
Available-for-sale securities, cost	241,977
Available-for-sale securities, fair value	$ 241,737	$ 249,476

Note 5 - Concentrations (Detail

Note 5 - Concentrations (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Allowance for Doubtful Accounts Receivable	$ 155	$ 155
Allowance for Distributors' Price Adjustment	$ 1,292	$ 2,643
Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member] | Customer E and Subcontractors [Member]
Concentration Risk, Percentage	17.00%
Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member] | Customer F and Subcontractors [Member]
Concentration Risk, Percentage	14.00%	16.00%
Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member] | Customer G and Subcontractors [Member]
Concentration Risk, Percentage	11.00%	12.00%

Note 5 - Concentrations - Conce

Note 5 - Concentrations - Concentration Risk, by Risk Factor (Details) - Customer Concentration Risk [Member]		12 Months Ended
		Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Accounts Receivable [Member] | Customer A [Member]
Concentration risk, percentage		29.00%			[1]
Accounts Receivable [Member] | Customer B [Member]
Concentration risk, percentage		14.00%			[1]
Accounts Receivable [Member] | Customer C [Member]
Concentration risk, percentage		13.00%		22.00%
Accounts Receivable [Member] | Customer D [Member]
Concentration risk, percentage			[1]	13.00%
Sales Revenue, Goods, Net [Member] | Customer A [Member]
Concentration risk, percentage		12.00%			[1]		[1]
Sales Revenue, Goods, Net [Member] | Customer B [Member]
Concentration risk, percentage	[1]
Sales Revenue, Goods, Net [Member] | Customer C [Member]
Concentration risk, percentage		12.00%		13.00%			[1]
[1]	Less than 10% of total receivable or total revenue

Note 6 - Inventories (Details T

Note 6 - Inventories (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Other Inventory, Materials, Supplies and Merchandise under Consignment, Gross	$ 0	$ 805

Note 6 - Inventories - Schedule

Note 6 - Inventories - Schedule of Inventory (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Raw materials	$ 12,267	$ 1,648
Work in process	13,800	15,999
Finished goods	5,654	14,392
Total inventories	$ 31,721	$ 32,039

Note 7 - Property and Equipme61

Note 7 - Property and Equipment, Net (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Depreciation	$ 20,631	$ 15,943	$ 12,106
Capitalized Computer Software, Gross	7,181	6,453
Capitalized Computer Software, Amortization	1,038	1,152	$ 1,011
Capital Expenditures Incurred but Not yet Paid	3,339	4,221
Capital Leased Assets, Gross	3,639	3,698
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation	$ 898	$ 36

Note 7 - Property and Equipme62

Note 7 - Property and Equipment, Net - Property and Equipment Components (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property and equipment, gross	$ 132,151	$ 97,753
Less accumulated depreciation	(71,807)	(53,282)
Total property and equipment	60,344	44,471
Equipment [Member]
Property and equipment, gross	94,609	64,402
Office, Software, and Computer Equipment [Member]
Property and equipment, gross	28,594	25,248
Furniture and Fixtures [Member]
Property and equipment, gross	1,698	1,396
Leasehold Improvements [Member]
Property and equipment, gross	$ 7,250	$ 6,707

Note 7 - Property and Equipme63

Note 7 - Property and Equipment, Net - Minimum Capital Lease Payments (Details) $ in Thousands	Dec. 31, 2017USD ($)
2,018	$ 662
2,019	504
2,020	364
2,021	93
Total minimum lease payments	1,623
Less: Amount representing interest	227
Minimum lease payments, net of interest	$ 1,396

Note 8 - Goodwill and Identif64

Note 8 - Goodwill and Identifiable Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Impairment of Intangible Assets (Excluding Goodwill)		$ 47,014		$ 1,750
Goodwill, Period Increase (Decrease)		(575)	95,923
Goodwill, Written off Related to Sale of Business Unit			714
ClariPhy Communications Inc.[Member]
Impairment of Intangible Assets (Excluding Goodwill)	$ 47,014	47,014
Goodwill, Acquired During Period			$ 96,637
ClariPhy Communications Inc.[Member] | Cost of Sales [Member]
Impairment of Intangible Assets (Excluding Goodwill)		10,174
ClariPhy Communications Inc.[Member] | Research and Development Expense [Member]
Impairment of Intangible Assets (Excluding Goodwill)		$ 36,840
Cortina Systems Inc. [Member]
Impairment of Intangible Assets (Excluding Goodwill)				$ 1,750

Note 8 - Goodwill and Identif65

Note 8 - Goodwill and Identifiable Intangible Assets - Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Intangible assets, accumulated amortization	$ 85,335	$ 30,120
Intangible assets, gross	308,268	357,183
Intangible assets, net	222,933	327,063
Developed Technology Rights [Member]
Finite lived intangible assets, gross	126,300	138,020
Intangible assets, accumulated amortization	53,533	26,579
Finite lived intangible assets, net	72,767	111,441
Customer Relationships [Member]
Finite lived intangible assets, gross	70,540	70,540
Intangible assets, accumulated amortization	11,954	2,227
Finite lived intangible assets, net	58,586	68,313
Trade Names [Member]
Finite lived intangible assets, gross	2,310	2,310
Intangible assets, accumulated amortization	888	426
Finite lived intangible assets, net	1,422	1,884
Patents [Member]
Finite lived intangible assets, gross	1,579	1,579
Intangible assets, accumulated amortization	734	552
Finite lived intangible assets, net	845	1,027
Computer Software, Intangible Asset [Member]
Finite lived intangible assets, gross	47,039	47,394
Intangible assets, accumulated amortization	18,226	336
Finite lived intangible assets, net	28,813	47,058
In Process Research and Development [Member]
Indefinite lived Intangible assets	$ 60,500	$ 97,340

Note 8 - Goodwill and Identif66

Note 8 - Goodwill and Identifiable Intangible Assets - Finite-lived Intangible Assets, Accumulated Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Amortization of intangible assets	$ 57,224	$ 14,170	$ 12,734
Cost of Sales [Member]
Amortization of intangible assets	28,502	12,223	11,499
Research and Development Expense [Member]
Amortization of intangible assets	18,352	336
Selling and Marketing Expense [Member]
Amortization of intangible assets	9,727	1,209	817
General and Administrative Expense [Member]
Amortization of intangible assets	$ 643	$ 402	$ 418

Note 8 - Goodwill and Identif67

Note 8 - Goodwill and Identifiable Intangible Assets - Amortization of Intangible Assets, Future Amortization Expense (Details) $ in Thousands	Dec. 31, 2017USD ($)
2,018	$ 52,367
2,019	48,619
2,020	21,118
2,021	17,919
2,022	12,161
Thereafter	10,249
Total amortization expense	$ 162,433

Note 8 - Intangible Assets Weig

Note 8 - Intangible Assets Weighted-average Amortization Periods (Details)	12 Months Ended
	Dec. 31, 2017
Developed Technology Rights [Member]
Finite-lived intangible assets, remaining amortization period (Year)	3 years 36 days
Customer Relationships [Member]
Finite-lived intangible assets, remaining amortization period (Year)	6 years
Trade Names [Member]
Finite-lived intangible assets, remaining amortization period (Year)	3 years 182 days
Patents [Member]
Finite-lived intangible assets, remaining amortization period (Year)	8 years 328 days
Computer Software, Intangible Asset [Member]
Finite-lived intangible assets, remaining amortization period (Year)	1 year 328 days

Note 9 - Convertible Debt (Deta

Note 9 - Convertible Debt (Details Textual) $ / shares in Units, $ in Thousands	1 Months Ended		12 Months Ended
	Sep. 30, 2016USD ($)$ / shares$ / item	Dec. 31, 2015USD ($)$ / shares$ / item	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)$ / shares$ / item
Proceeds from Convertible Debt				$ 279,459	$ 223,993
Payments for Call Options				22,540	$ 17,802
Convertible Debt [Member]
Capped Call, Aggregate Call Options Purchased, Percentage Related to Shares Underlying the Convertible Note		100.00%			100.00%
Convertible Debt [Member] | Convertible Notes 2015 [Member]
Debt Instrument, Face Amount		$ 230,000			$ 230,000
Debt Instrument, Interest Rate, Stated Percentage		1.125%			1.125%
Debt Instrument, Convertible, Conversion Ratio		24.8988
Debt Instrument, Convertible, Conversion Price | $ / shares		$ 40.16			$ 40.16
Capped Call, Aggregate Call Options Purchased, Percentage Related to Shares Underlying the Convertible Note		100.00%			100.00%
Convertible Debt Holders in Default, Percent of Principal Amount		25.00%			25.00%
Convertible Debt in Default, Percent Holders to Declare Due and Payable		100.00%			100.00%
Convertible Debt in Bankruptcy, Insolvency, and Reorganization, Percent due and Payable		100.00%			100.00%
Proceeds from Convertible Debt					$ 230,000
Convertible Debt		$ 175,974			175,974
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt		54,026
Debt Issuance Costs, Gross		6,359			6,359
Payments of Debt Issuance Costs		6,007
Unamortized Debt Issuance Expense		4,864			4,864
Debt Instrument, Convertible Equity Component Issuance Cost		$ 1,495			1,495
Interest Expense, Debt			13,574	12,853	783
Interest Expense, Debt, Excluding Amortization			2,588	2,577	192
Amortization of Debt Discount (Premium)			10,079	9,427	543
Amortization of Debt Issuance Costs			907	849	$ 48
Derivative, Cap Price | $ / item		52.06			52.06
Payments for Call Options		$ 17,802
Convertible Debt [Member] | Convertible Notes 2015 [Member] | Conversion Circumstance 1 [Member]
Debt Instrument, Convertible, Threshold Trading Days					20
Debt Instrument, Convertible, Threshold Consecutive Trading Days					30
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger					130.00%
Convertible Debt [Member] | Convertible Notes 2015 [Member] | Conversion Circumstance 2 [Member]
Debt Instrument, Convertible, Threshold Trading Days					5
Debt Instrument, Convertible, Threshold Consecutive Trading Days					5
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger					98.00%
Convertible Debt [Member] | Convertible Notes 2016 [Member]
Debt Instrument, Face Amount	$ 287,500
Debt Instrument, Interest Rate, Stated Percentage	0.75%
Debt Instrument, Convertible, Conversion Ratio	17.7508
Debt Instrument, Convertible, Conversion Price | $ / shares	$ 56.34
Capped Call, Aggregate Call Options Purchased, Percentage Related to Shares Underlying the Convertible Note	100.00%
Convertible Debt Holders in Default, Percent of Principal Amount	25.00%
Convertible Debt in Default, Percent Holders to Declare Due and Payable	100.00%
Convertible Debt in Bankruptcy, Insolvency, and Reorganization, Percent due and Payable	100.00%
Proceeds from Convertible Debt	$ 287,500
Convertible Debt	216,775
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt	70,725
Debt Issuance Costs, Gross	5,798
Debt Instrument, Convertible Equity Component Issuance Cost	$ 1,891
Interest Expense, Debt			15,742	4,553
Interest Expense, Debt, Excluding Amortization			2,154	651
Amortization of Debt Discount (Premium)			12,559	3,607
Amortization of Debt Issuance Costs			$ 1,029	$ 295
Derivative, Cap Price | $ / item	73.03
Payments for Call Options	$ 22,540
Debt Instrument, Repurchase Price, Percentage of Principal Amount Repurchased	100.00%
Debt and Equity Issuance Costs, Net	$ 7,689
Convertible Debt [Member] | Convertible Notes 2016 [Member] | Conversion Circumstance 1 [Member]
Debt Instrument, Convertible, Threshold Trading Days	20
Debt Instrument, Convertible, Threshold Consecutive Trading Days	30
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger	130.00%
Convertible Debt [Member] | Convertible Notes 2016 [Member] | Conversion Circumstance 2 [Member]
Debt Instrument, Convertible, Threshold Trading Days	5
Debt Instrument, Convertible, Threshold Consecutive Trading Days	5
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger	98.00%

Note 10 - Other Liabilities - O

Note 10 - Other Liabilities - Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Obligations under capital lease	$ 539	$ 797
Intangible asset liability	16,892	14,688
Others	3,956	9,251
Other current liabilities	$ 21,387	$ 24,736

Note 10 - Other Liabilities -71

Note 10 - Other Liabilities - Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred rent	$ 1,487	$ 1,067
Income tax payable	830	1,554
Obligations under capital lease	857	1,633
Intangible asset liability	14,445	32,651
Deferred tax liabilities	6,146	27,371
Others	862	668
Total other long-term liabilities	$ 24,627	$ 64,944

Note 11 - Income Taxes (Details

Note 11 - Income Taxes (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2017	Dec. 31, 2020	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2019
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				34.00%	34.00%	34.00%
Effective Income Tax Rate Reconciliation, at Highest Federal Statutory Income Tax Rate, Percent				35.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ (4,602)
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount				$ 39,907	$ 5,064	$ (6,115)
Earnings Per Share, Tax Holiday Effect				$ 0.18	$ (0.14)
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	575			$ 575
Decrease in Unrecognized Tax Benefits is Reasonably Possible	119			119
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense				16	$ 119
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	113			113	222	163
Undistributed Earnings of Foreign Subsidiaries	54,784			54,784
Cumulative Effect on Retained Earnings, Net of Tax				(1,217)	5,261
Accounting Standards Update 2016-16 [Member]
Cumulative Effect on Retained Earnings, Net of Tax				1,217
Domestic Tax Authority [Member]
Operating Loss Carryforwards	206,996			206,996
Domestic Tax Authority [Member] | Cortina Systems Inc. [Member]
Operating Loss Carryforwards	49,152			49,152
Domestic Tax Authority [Member] | ClariPhy Communications Inc.[Member]
Operating Loss Carryforwards	46,601			46,601
Domestic Tax Authority [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	40,118			40,118
Domestic Tax Authority [Member] | Research Tax Credit Carryforward [Member] | Cortina Systems Inc. [Member]
Tax Credit Carryforward, Amount	6,033			6,033
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	88,680			88,680
State and Local Jurisdiction [Member] | Cortina Systems Inc. [Member]
Operating Loss Carryforwards	3,919			3,919
State and Local Jurisdiction [Member] | ClariPhy Communications Inc.[Member]
Operating Loss Carryforwards	68,177			68,177
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	42,248			42,248
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member] | Cortina Systems Inc. [Member]
Tax Credit Carryforward, Amount	7,977			7,977
State and Local Jurisdiction [Member] | Canada Revenue Agency [Member]
Tax Credit Carryforward, Amount	9,457			9,457
State and Local Jurisdiction [Member] | Canada Revenue Agency [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	3,060			3,060
Foreign Tax Authority [Member]
Increase (Decrease) in Income Taxes				7,412	(6,216)
Foreign Tax Authority [Member] | Tax Authority, Taiwan [Member]
Operating Loss Carryforwards	2,790			2,790
Foreign Tax Authority [Member] | Her Majesty's Revenue and Customs (HMRC) [Member]
Operating Loss Carryforwards	$ 7,038			$ 7,038
Foreign Tax Authority [Member] | Inland Revenue, Singapore (IRAS) [Member]
Effective Income Tax Rate Reconciliation, Tax Holiday, Percent				5.00%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent				17.00%
Foreign Tax Authority [Member] | Inland Revenue, Singapore (IRAS) [Member] | Tax Year 2010 [Member]
Open Tax Year				2,010
Foreign Tax Authority [Member] | Inland Revenue, Singapore (IRAS) [Member] | Tax Year 2011 [Member]
Open Tax Year				2,011
Foreign Tax Authority [Member] | Inland Revenue, Singapore (IRAS) [Member] | Tax Year 2012 [Member]
Open Tax Year				2,012
Increase to Other Comprehensive Income [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount				$ 134	305
Decrease to Goodwill [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount				(158)
Increase to Income Tax Provision [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount				$ 39,931	10,647	13,669
Decrease to Additional Paid-in Capital [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount					(16,044)	(18,383)
Increase to Goodwill [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount					3,088	767
Increase to Retained Earnings [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount					$ 7,068
Decrease to Other Comprehensive Income [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount						$ (2,168)
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Scenario, Forecast [Member] | Foreign Tax Authority [Member] | Administracion Federal de Ingresos Publicos (AFIP) [Member]
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent		35.00%					14.00%

Note 11 - Income Taxes - Income

Note 11 - Income Taxes - Income Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
United States	$ (77,649)	$ (15,202)	$ (5,642)
Foreign	(18,431)	26,658	(4,462)
Income (loss) before income taxes from continuing operations	$ (96,080)	$ 11,456	$ (10,104)

Note 11 - Income Taxes - Compon

Note 11 - Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
U.S. Federal	$ 96	$ 938	$ 5,272
U.S. State	51	(22)	187
Foreign	1,105	35	541
Total current income tax expense	1,252	951	6,000
Deferred:
U.S. Federal	(11,312)	(16,755)	(114)
U.S. State	(613)		(15)
Foreign	(10,503)	747	(14)
Total deferred income tax expense	(22,428)	(16,008)	(143)
Total	$ (21,176)	$ (15,057)	$ 5,857

Note 11 - Income Taxes - Effect

Note 11 - Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Expenses (benefit) at statutory rate	$ (32,562)	$ 3,895	$ (3,435)
State income taxes	(585)	222	(4)
Research and development credits	(12,983)	(8,566)	(8,526)
Change in valuation allowance	40,028	9,768	12,748
Impact of foreign operations	(1,951)	(13,570)	2,652
Unrecognized tax benefits	3,596	3,151	3,044
Stock-based compensation	(10,248)	(9,925)	143
Prior year return to provision adjustment	1,105	(524)	(392)
Effect of U. S. tax law change	(4,602)
Impairment of intangibles	(2,328)
Other	(646)	492	(373)
Total	$ (21,176)	$ (15,057)	$ 5,857

Note 11 - Income Taxes - Comp76

Note 11 - Income Taxes - Components of Company's Net Deferred Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets
Net operating loss carry forwards	$ 34,366	$ 38,337
Research and development credits	62,118	46,492
Stock-based compensation	6,021	9,225
Accrued expenses and allowances	2,004	2,621
Amortization and depreciation	4,910
Other temporary differences	4,018	3,088
Foreign tax credit	2,557	1,290
Valuation allowance	(78,538)	(38,631)
Total deferred tax assets	37,456	62,422
Deferred tax liabilities
Acquired intangible assets	(26,602)	(55,563)
Acquired tangible assets	(255)	(3,629)
Convertible debt	(15,213)	(30,177)
Amortization and depreciation		(415)
Other deferred tax liabilities	(68)	(9)
Total deferred tax liabilities	(42,138)	(89,793)
Deferred tax liabilities, net	$ (4,682)	$ (27,371)

Note 11 - Income Taxes - Summar

Note 11 - Income Taxes - Summary of Changes in Gross Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Balance	$ 56,503	$ 46,453	$ 44,081
Increases based on tax positions related to the current year	4,656	5,450	4,459
Decreases based on tax positions of prior year	(13,452)	(1,766)	(1,923)
Gross increases for acquired unrecognized tax benefits		6,585
Statute of limitation expirations	(101)	(219)	(164)
Balance	$ 47,606	$ 56,503	$ 46,453

Note 12 - Earnings Per Share (D

Note 12 - Earnings Per Share (Details Textual)	12 Months Ended
	Dec. 31, 2016shares
Adoption of ASU 2016-09 [Member]
Weighted Average Number Diluted Shares Outstanding Adjustment	993,720

Note 12 - Earnings Per Share -

Note 12 - Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Weighted average common stock—basic (in shares)	42,165,213	40,565,433	38,580,330
Effect of potentially dilutive securities:
Add options to purchase common stock (in shares)		1,300,649
Add unvested restricted stock unit (in shares)		2,158,260
Add employee stock purchase plan (in shares)		8,240
Add convertible debt (in shares)		92,299
Weighted average common stock—diluted (in shares)	42,165,213	44,124,881	38,580,330

Note 12 - Earnings Per Share 80

Note 12 - Earnings Per Share - Securities Not Included in Computation of Earnings Per Share (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Anti-dilutive securities (in shares)	15,222,148	6,119,393	7,612,612
Employee Stock Option [Member]
Anti-dilutive securities (in shares)	1,456,610		2,563,230
Restricted Stock [Member]
Anti-dilutive securities (in shares)	2,935,500	284,871	4,672,806
Convertible Debt Securities [Member]
Anti-dilutive securities (in shares)	10,830,038	5,834,522	376,576

Note 13 - Stock-based Compens81

Note 13 - Stock-based Compensation (Details Textual) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Common Stock, Capital Shares Reserved for Future Issuance		4,285,254
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		$ 11,312	$ 15,390	$ 10,696
Proceeds from Stock Options Exercised		$ 2,214	$ 5,748	$ 6,145
Stock Issued During Period, Shares, Employee Stock Purchase Plans		171,099	285,101	326,764
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 107,303
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		2 years 273 days
Adoption of ASU 2016-09 [Member]
Weighted Average Number Diluted Shares Outstanding Adjustment			993,720
Adoption of ASU 2016-09 [Member] | Adjustments to Beginning Retained Earnings Balance [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			$ 5,261
Adoption of ASU 2016-09 [Member] | Adjustments to Beginning Retained Earnings Balance [Member] | Year Ended December 31, 2015 [Member]
Prior Period Reclassification Adjustment			$ 4,305
Employee Stock Purchase Plan [Member]
Maximum Percentage of Aggregate Cash Compensation for Purchase of Stock Using Payroll Deduction	15.00%
Purchase Price PerShare as Percentage of Market Value	85.00%
Percentage of Combined Voting Power or Value of All Classes of Stock Not Eligible to Participate	5.00%
Fair Value of Common Stock in Calendar Year per Employee Not Eligible to Participate	$ 25
Maximum Aggregate Number of Shares of Common Stock Available for Purchase under Employee Stock Purchase Plan		1,750,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		4 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period		1,658,207
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		3,987,552	4,448,630
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		4 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period		101,193
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		324,663

Note 13 - Stock-based Compens82

Note 13 - Stock-based Compensation - Options Outstanding (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Number of shares outstanding (in shares)	1,647,845
Number of shares outstanding, weighted-average exercise price (in dollars per share)	$ 10.86
Number of shares outstanding, weighted-average remaining contractual life (Year)	3 years 94 days	4 years 102 days
Number of shares outstanding, aggregate intrinsic value	$ 33,578	$ 55,636
Number of shares exercised (in shares)	(300,982)
Number of shares exercised, weighted-average exercise price (in dollars per share)	$ 7.22
Number of shares outstanding (in shares)	1,346,863	1,647,845
Number of shares outstanding, weighted-average exercise price (in dollars per share)	$ 11.67	$ 10.86
Number of shares exercisble (in shares)	1,346,863
Number of shares exercisble, weighted-average exercise price (in dollars per share)	$ 11.67
Number of shares exercisble, weighted-average remaining contractual life (Year)	3 years 94 days
Number of shares exercisable, aggregate intrinsic value	$ 33,578
Vested and expected to vest in the future (in shares)	1,346,863
Number of shares vested and expected to vest in the future, weighted-average exercise price (in dollars per share)	$ 11.67
Number of shares vested and expected to vest in the future, weighted-average remaining contractual life (Year)	3 years 94 days
Number of shares vested and expected to vest in the future, aggregate intrinsic value	$ 33,578

Note 13 - Stock-based Compens83

Note 13 - Stock-based Compensation - Outstanding Restricted Stock Units (Details) - Restricted Stock Units (RSUs) [Member]	12 Months Ended
	Dec. 31, 2017$ / sharesshares
Outstanding (in shares)	4,448,630
Outstanding, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 27.29
Granted (in shares)	1,475,285
Granted, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 42.24
Vested (in shares)	(1,658,207)
Vested, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 22.39
Canceled (in shares)	(278,156)
Canceled, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 32.63
Outstanding (in shares)	3,987,552
Outstanding, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 34.48
Expected to vest (in shares)	3,888,697

Note 13 - Stock-based Compens84

Note 13 - Stock-based Compensation - Fair Value of Employee Stock Purchase Plan (Details) - Employee Stock Purchase Plan [Member]	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Risk-free interest rate	0.94%	0.45%	0.14%
Expected life (Year)	182 days	182 days	182 days
Dividend yield
Expected volatility	42.00%	54.00%	42.00%
Estimated fair value	11.03%	8.99%	5.77%

Note 13 - Stock-based Compens85

Note 13 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stock-based compensation expense	$ 44,833	$ 30,192	$ 28,293
Cost of Sales [Member]
Stock-based compensation expense	2,045	1,796	1,359
Research and Development Expense [Member]
Stock-based compensation expense	28,846	17,390	13,268
Selling and Marketing Expense [Member]
Stock-based compensation expense	8,340	4,405	3,213
General and Administrative Expense [Member]
Stock-based compensation expense	5,602	4,407	5,473
Net income (Loss) from Discontinued Operations [Member]
Stock-based compensation expense		$ 2,194	$ 4,980

Note 14 - Employee Benefit Pl86

Note 14 - Employee Benefit Plan (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 1,137	$ 2,625	$ 1,131

Note 15 - Fair Value Measurem87

Note 15 - Fair Value Measurements - Assets and Liabilities Carried at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Total fair value of assets	$ 325,132	$ 266,743
Convertible Notes	555,200	616,831
Fair Value, Inputs, Level 1 [Member]
Total fair value of assets	31	14,110
Convertible Notes
Fair Value, Inputs, Level 2 [Member]
Total fair value of assets	325,101	252,633
Convertible Notes	555,200	616,831
Money Market Funds [Member]
Cash equivalents	3,332	17,267
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Cash equivalents	31	10,110
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Cash equivalents	3,301	7,157
Municipal Bonds [Member]
Cash equivalents	999
Investment in marketable securities	27,657	45,171
Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Cash equivalents
Investment in marketable securities
Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Cash equivalents	999
Investment in marketable securities	27,657	45,171
US Treasury Securities [Member]
Investment in marketable securities		4,000
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Investment in marketable securities		4,000
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Investment in marketable securities
Corporate Debt Securities [Member]
Cash equivalents	2,608
Investment in marketable securities	146,401	112,205
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Cash equivalents
Investment in marketable securities
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Cash equivalents	2,608
Investment in marketable securities	146,401	112,205
Commercial Paper [Member]
Cash equivalents	76,456
Investment in marketable securities	56,994	23,947
Commercial Paper [Member] | Fair Value, Inputs, Level 1 [Member]
Cash equivalents
Investment in marketable securities
Commercial Paper [Member] | Fair Value, Inputs, Level 2 [Member]
Cash equivalents	76,456
Investment in marketable securities	56,994	23,947
Variable Rate Demand Note [Member]
Investment in marketable securities	3,500	58,930
Variable Rate Demand Note [Member] | Fair Value, Inputs, Level 1 [Member]
Investment in marketable securities
Variable Rate Demand Note [Member] | Fair Value, Inputs, Level 2 [Member]
Investment in marketable securities	3,500	58,930
Asset-backed Securities [Member]
Investment in marketable securities	7,185	5,223
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Investment in marketable securities
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Investment in marketable securities	$ 7,185	$ 5,223

Note 16 - Segment and Geograp88

Note 16 - Segment and Geographic Information (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Number of Reportable Segments	1
Non-US [Member]
Long-Lived Assets	$ 8,695	$ 6,567
TAIWAN, PROVINCE OF CHINA
Long-Lived Assets	$ 4,647	$ 5,068

Note 16 - Segment and Geograp89

Note 16 - Segment and Geographic Information - Revenue by Geographic Region (Details) - USD ($) $ in Thousands

3 Months Ended

12 Months Ended

Dec. 31, 2017

[1],[2]

Sep. 30, 2017

[1],[3]

Jun. 30, 2017

[1]

Mar. 31, 2017

[1]

Dec. 31, 2016

[1],[4]

Sep. 30, 2016

[1],[4]

Jun. 30, 2016

[1],[4]

Mar. 31, 2016

[1],[4]

Dec. 31, 2017

Dec. 31, 2016

Dec. 31, 2015

Revenue

$ 85,683

$ 84,511

$ 84,423

$ 93,584

$ 80,912

$ 70,750

$ 60,524

$ 54,091

$ 348,201

$ 266,277

$ 192,710

CHINA

Revenue

114,168

103,071

61,448

UNITED STATES

Revenue

92,620

29,976

34,605

JAPAN

Revenue

29,061

36,308

24,410

THAILAND

Revenue

45,205

35,837

25,123

Other Country [Member]

Revenue

$ 67,147

$ 61,085

$ 47,124

[1]

On December 12, 2016, the Company completed the acquisition of ClariPhy Communications Inc. for $303,661 in cash. The revenue and expenses of ClariPhy are included in the consolidated statement of income from December 12, 2016.

[2]

The benefit for income taxes included revaluation of deferred tax liabilities to the new federal tax rate of 21% and tax benefit from intercompany transfer of intellectual property rights.

[3]

The Company abandoned a project related to certain developed technology and in-process research and development from the ClariPhy acquisition which resulted to an impairment charge of $47,014.

[4]

In August 2016, the Company completed the sale of its memory product business to Rambus Inc. As a result of the sale, the Company's consolidated financial statements for current and prior periods have been retrospectively reclassified to present the results of operations of the memory product business as discontinued operations.

Note 17 - Commitments and Con90

Note 17 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Leases, Rent Expense, Net		$ 6,865	$ 13,870	$ 11,869
Value of Open Purchase Orders		7,299
Estimated Litigation Liability		0	$ 0
Patent Dispute with Vitesse [Member]
Payments for Legal Settlements	$ 750
Amount to Be Refunded from Escrow				$ 750
Equipment and Software Licenses [Member]
Purchase Obligation		2,171
Mask [Member]
Purchase Obligation		$ 628

Note 17 - Commitments and Con91

Note 17 - Commitments and Contingencies - Future Minimum Lease Payments Under Noncancelable Operating Leases (Details) $ in Thousands	Dec. 31, 2017USD ($)
2,018	$ 5,815
2,019	5,635
2,020	2,849
2,021	1,988
2,022	1,724
2023 and thereafter	3,321
	$ 21,332

Note 18 - Supplementary Finan92

Note 18 - Supplementary Financial Information (Unaudited) (Details Textual) - USD ($) $ in Thousands	Dec. 12, 2016	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Impairment of Intangible Assets (Excluding Goodwill)				$ 47,014		$ 1,750
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				34.00%	34.00%	34.00%
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
ClariPhy Communications Inc.[Member]
Payments to Acquire Businesses, Gross	$ 303,661
Impairment of Intangible Assets (Excluding Goodwill)		$ 47,014		$ 47,014

Note 18 - Supplementary Finan93

Note 18 - Supplementary Financial Information (Unaudited) - Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2017	[1],[2]	Sep. 30, 2017	[1],[3]	Jun. 30, 2017	[1]	Mar. 31, 2017	[1]	Dec. 31, 2016	[1],[4]	Sep. 30, 2016	[1],[4]	Jun. 30, 2016	[1],[4]	Mar. 31, 2016	[1],[4]	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Total revenue	$ 85,683		$ 84,511		$ 84,423		$ 93,584		$ 80,912		$ 70,750		$ 60,524		$ 54,091		$ 348,201	$ 266,277	$ 192,710
Gross profit	53,084		42,071		47,835		53,513		54,289		48,188		41,249		36,970		196,503	180,696	120,016
Net income (loss) from continuing operations	102		(48,766)		(14,967)		(11,273)		19,064		6,596		943		(90)		(74,904)	26,513	(15,961)
Net income (loss)	$ 102		$ (48,766)		$ (14,967)		$ (11,273)		$ 19,133		$ 79,572		$ 531		$ 220		$ (74,904)	$ 99,456	$ (13,551)
Basic earnings per share (in dollars per share)			$ (1.15)		$ (0.36)		$ (0.27)		$ 0.46		$ 1.95		$ 0.01		$ 0.01		$ (1.78)	$ 2.45	$ (0.35)
Diluted earnings per share (in dollars per share)			$ (1.15)		$ (0.36)		$ (0.27)		$ 0.42		$ 1.80		$ 0.01		$ 0.01		$ (1.78)	$ 2.25	$ (0.35)
Net income from discontinued operations									$ 69		$ 72,976		$ (412)		$ 310			$ 72,943	$ 2,410
[1]	On December 12, 2016, the Company completed the acquisition of ClariPhy Communications Inc. for $303,661 in cash. The revenue and expenses of ClariPhy are included in the consolidated statement of income from December 12, 2016.
[2]	The benefit for income taxes included revaluation of deferred tax liabilities to the new federal tax rate of 21% and tax benefit from intercompany transfer of intellectual property rights.
[3]	The Company abandoned a project related to certain developed technology and in-process research and development from the ClariPhy acquisition which resulted to an impairment charge of $47,014.
[4]	In August 2016, the Company completed the sale of its memory product business to Rambus Inc. As a result of the sale, the Company's consolidated financial statements for current and prior periods have been retrospectively reclassified to present the results of operations of the memory product business as discontinued operations.