INPHI 10-K 25 Feb 21 2020 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Feb. 22, 2021	Jun. 30, 2020
Document Information [Line Items]
Entity Central Index Key	0001160958
Entity Registrant Name	INPHI CORP
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2020
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	001-34942
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0557980
Entity Address, Address Line One	110 Rio Robles
Entity Address, City or Town	San Jose
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95134
City Area Code	408
Local Phone Number	217-7300
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	IPHI
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 6,100,000,000
Entity Common Stock, Shares Outstanding		53,608,372

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 103,529	$ 282,723
Investments in marketable securities (amortized cost of $62,881 and $139,448 as of December 31, 2020 and 2019, respectively)	63,389	140,131
Accounts receivable, net	111,436	60,295
Inventories	111,403	55,013
Prepaid expenses and other current assets	10,137	17,463
Total current assets	399,894	555,625
Property and equipment, net	133,556	79,563
Goodwill	181,688	104,502
Intangible assets, net	231,633	168,290
Right of use assets, net	30,855	33,576
Other assets, net	30,610	34,450
Total assets	1,008,236	976,006
Current liabilities:
Accounts payable	36,387	18,771
Deferred revenue	3,281	3,719
Accrued employee expenses	35,627	13,164
Other accrued expenses	11,288	5,125
Convertible debt	58,004	217,467
Other current liabilities	45,930	33,531
Total current liabilities	190,517	291,777
Convertible debt	405,689	258,711
Other long-term liabilities	58,320	78,917
Total liabilities	654,526	629,405
Commitments and contingencies (Note 17)
Stockholders’ equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized; no shares issued	0	0
Common stock, $0.001 par value; 500,000,000 shares authorized; 53,381,854 and 45,909,466 issued and outstanding at December 31, 2020 and 2019 respectively	53	46
Additional paid-in capital	654,883	587,862
Accumulated deficit	(302,551)	(242,807)
Accumulated other comprehensive income	1,325	1,500
Total stockholders’ equity	353,710	346,601
Total liabilities and stockholders’ equity	$ 1,008,236	$ 976,006

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Amortized cost of investments in marketable securities	$ 62,881	$ 139,448
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)	53,381,854	45,909,466
Common stock, outstanding (in shares)	53,381,854	45,909,466

Consolidated Statements of Inco

Consolidated Statements of Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue	$ 682,954	$ 365,635	$ 294,490
Cost of revenue	311,823	152,814	129,345
Gross profit	371,131	212,821	165,145
Operating expenses:
Research and development	269,147	183,875	167,924
Sales and marketing	61,290	47,722	43,080
General and administrative	57,519	30,672	28,302
Total operating expenses	387,956	262,269	239,306
Loss from operations	(16,825)	(49,448)	(74,161)
Interest expense	(35,221)	(34,920)	(32,209)
Loss on early extinguishment of debt	(13,539)	0	0
Other income, net	10,295	11,853	2,408
Loss before income taxes	(55,290)	(72,515)	(103,962)
Provision (benefit) for income taxes	4,454	396	(8,211)
Net loss	$ (59,744)	$ (72,911)	$ (95,751)
Earnings per share:
Basic (in dollars per share)	$ (1.20)	$ (1.61)	$ (2.19)
Diluted (in dollars per share)	$ (1.20)	$ (1.61)	$ (2.19)
Weighted-average shares used in computing earnings per share:
Basic (in shares)	49,901,181	45,226,717	43,690,581
Diluted (in shares)	49,901,181	45,226,717	43,690,581

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net loss	$ (59,744)	$ (72,911)	$ (95,751)
Other comprehensive income (loss):
Change in unrealized gain or loss, net of $0, $0, and $0 tax expense in 2020, 2019 and 2018, respectively	121	1,173	(179)
Realized gain reclassified into earnings, net of $0, $0, and $0 tax expense in 2020, 2019 and 2018, respectively	(296)	(62)	(1)
Comprehensive loss	$ (59,919)	$ (71,800)	$ (95,931)

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Loss) (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Change in unrealized gain, tax	$ 0	$ 0	$ 0
Realized gain reclassified into earnings, 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, 2017	42,780,229
Balance at Dec. 31, 2017	$ 43	$ 484,934	$ (74,145)	$ 569	$ 411,401
Issuance of common stock from exercise of stock options (in shares)	187,742
Issuance of common stock from exercise of stock options	$ 0	719	0	0	719
Issuance of common stock from restricted stock unit grants, net of shares withheld for tax (in shares)	1,041,258
Issuance of common stock from restricted stock unit grants, net of shares withheld for tax	$ 1		0	0	$ (19,285)
Issuance of common stock from restricted stock unit grants, net of shares withheld for tax		(19,286)
Issuance of common stock from employee stock purchase plan (in shares)	283,493				283,493
Issuance of common stock from employee stock purchase plan	$ 0	5,906	0	0	$ 5,906
Stock-based compensation expense	0	63,884	0	0	63,884
Net loss	0	0	(95,751)	0	(95,751)
Other comprehensive income (loss), net	$ 0	0	0	(180)	(180)
Balance (in shares) at Dec. 31, 2018	44,292,722
Balance at Dec. 31, 2018	$ 44	536,157	(169,896)	389	366,694
Issuance of common stock from exercise of stock options (in shares)	253,980
Issuance of common stock from exercise of stock options	$ 0	2,616	0	0	2,616
Issuance of common stock from restricted stock unit grants, net of shares withheld for tax (in shares)	1,154,043
Issuance of common stock from restricted stock unit grants, net of shares withheld for tax	$ 2		0	0
Issuance of common stock from restricted stock unit grants, net of shares withheld for tax		(34,140)			$ (34,138)
Issuance of common stock from employee stock purchase plan (in shares)	208,721				208,721
Issuance of common stock from employee stock purchase plan	$ 0	6,374	0	0	$ 6,374
Stock-based compensation expense	0	76,855	0	0	76,855
Net loss	0	0	(72,911)	0	(72,911)
Other comprehensive income (loss), net	$ 0	0	0	1,111	1,111
Balance (in shares) at Dec. 31, 2019	45,909,466
Balance at Dec. 31, 2019	$ 46	587,862	(242,807)	1,500	$ 346,601
Issuance of common stock from exercise of stock options (in shares)	812,710				812,710
Issuance of common stock from exercise of stock options	$ 1	11,189	0	0	$ 11,190
Issuance of common stock from restricted stock unit grants, net of shares withheld for tax (in shares)	1,224,276
Issuance of common stock from restricted stock unit grants, net of shares withheld for tax	$ 1		0	0
Issuance of common stock from restricted stock unit grants, net of shares withheld for tax		(94,203)			$ (94,202)
Issuance of common stock from employee stock purchase plan (in shares)	128,892				128,892
Issuance of common stock from employee stock purchase plan	$ 0	7,893	0	0	$ 7,893
Stock-based compensation expense	0	111,247	0	0	111,247
Net loss	0	0	(59,744)	0	(59,744)
Other comprehensive income (loss), net	0	0	0	(175)	(175)
Conversion feature of Convertible Notes 2020, net of issuance costs	0	100,616	0	0	100,616
Purchase of Capped Call 2020	$ 0	(55,660)	0	0	(55,660)
Impact of repurchases of Convertible Notes 2015 and Convertible Notes 2016 (in shares)	4,977,756
Impact of repurchases of Convertible Notes 2015 and Convertible Notes 2016	$ 5	(14,048)	0	0	(14,043)
Conversion of Convertible Notes 2015 to common stock (in shares)	24
Issuance of common stock from maturity of Convertible Notes 2015 (in shares)	851,448
Issuance of common stock from maturity of Convertible Notes 2015	$ 1	(14)	0	0	(13)
Maturity of Capped Call 2015 (in shares)	(522,718)
Maturity of Capped Call 2015	$ (1)	1	0	0	0
Balance (in shares) at Dec. 31, 2020	53,381,854
Balance at Dec. 31, 2020	$ 53	$ 654,883	$ (302,551)	$ 1,325	$ 353,710

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities
Net loss	$ (59,744)	$ (72,911)	$ (95,751)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	127,650	96,694	82,719
Stock-based compensation	111,247	76,855	63,884
Gain from sale of an equity investment	0	(924)	0
Loss on disposal of property and equipment	484	444	331
Net unrealized gain on equity investments	(2,010)	(2,201)	(2,441)
Realized gain on an equity investment	(4,999)	0	0
Impairment of non-marketable equity investment	0	0	7,000
Deferred income taxes	3,703	337	(8,628)
Accretion of convertible debt and amortization of debt issuance costs	29,277	28,353	26,394
Amortization of premiums (discount) on marketable securities	144	(1,118)	(583)
Loss on termination of software lease contracts	3,370	0	0
Loss on early extinguishment of debt	13,539	0	0
Other noncash items	(52)	(46)	2
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	(50,841)	(1,524)	6,722
Inventories	(35,178)	(21,961)	(1,331)
Prepaid expenses and other assets	28,372	(2,707)	549
Income tax payable/receivable	585	279	(1,671)
Accounts payable	11,240	482	1,963
Accrued expenses	(11,406)	(805)	(4,902)
Deferred revenue	(7,939)	(1,713)	4,997
Other liabilities	(1,857)	(590)	(1,095)
Net cash provided by operating activities	155,585	96,944	78,159
Cash flows from investing activities
Purchases of property and equipment	(74,823)	(29,518)	(31,713)
Proceeds from disposal of property and equipment	0	0	145
Purchases of marketable securities	(41,909)	(274,246)	(248,038)
Sales of marketable securities	65,588	168,426	11,654
Maturities of marketable securities	53,072	203,068	242,825
Proceeds from sale of equity investments	14,999	3,424	2,414
Acquisitions of businesses, net of cash acquired	(223,731)	0	0
Purchases of intangible assets	(788)	(1,137)	(126)
Purchases of equity investments in private companies	(5,999)	(7,000)	(12,811)
Net cash provided by (used in) investing activities	(213,591)	63,017	(35,650)
Cash flows from financing activities
Proceeds from exercise of stock options	11,190	2,616	719
Proceeds from employee stock purchase plan	7,893	6,374	5,906
Proceeds from issuance of Convertible Notes 2020, net of cost	493,350	0	0
Payments of third party issuance costs on Convertible Notes 2020	(857)	0	0
Payment for repurchases and settlement of Convertible Notes 2015 and Convertible Notes 2016	(461,236)	0	0
Minimum tax withholding paid on behalf of employees for net share settlement	(80,375)	(33,596)	(19,118)
Payments of obligations related to purchase of intangible assets	(35,158)	(24,221)	(21,311)
Repayment of long-term loan	0	0	405
Purchase of Capped Call 2020	(55,660)	0	0
Payments of obligations related to equipment financing	(335)	(429)	(542)
Net cash used in financing activities	(121,188)	(49,256)	(33,941)
Net increase (decrease) in cash and cash equivalents	(179,194)	110,705	8,568
Cash and cash equivalents at beginning of year	282,723	172,018	163,450
Cash and cash equivalents at end of year	103,529	282,723	172,018
Supplemental cash flow information
Income taxes paid (refund received)	574	(155)	2,155
Interest paid	5,932	6,577	5,818
Supplemental disclosure of non-cash investing and financing activities
Software license intangible assets	1,870	57,406	20,066
Settlement of net receivable from eSilicon as part of purchase consideration	5,250	0	0
Marketable equity investment acquired as settlement of receivable from a customer	$ 0	$ 2,500	$ 0

Note 1 - Organization and Summa

Note 1 - Organization and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
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. On January 10, 2020, January 10, 2020 On May 18, 2020, May 18, 2020 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, 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 the Company and subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Business Combinations The Company accounts for acquisitions of business using the purchase method of accounting, which requires the Company to recognize separately from goodwill the assets acquired and the liabilities assumed at their acquisition date fair values. While the Company uses its best estimates and assumptions to accurately value assets acquired and liabilities assumed at the acquisition date as well as contingent consideration, where applicable, the estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may 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, the Company evaluates its estimates and judgments compared to historical experience and expected trends. On an ongoing basis, management evaluates its estimates, including those related to (i) the accounts receivable credit losses 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 measurement of non-marketable 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 In March 2020, 19 19 December 31, 2020 not not 19 19 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 loss in 2020, 2019 2018 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 Certain Financial Instruments The carrying amount reflected in the balance sheet for cash and cash equivalents, accounts receivable, prepaid and other current assets, accounts payable and other current liabilities, approximate fair value due to the short-term nature of these financial instruments. Investments Investments in marketable securities consist of available-for-sale securities. These investments are recorded at fair value with changes in fair value, net of applicable taxes, recorded as unrealized gains (losses) as a component of accumulated other comprehensive income in stockholders' equity. Realized gains and losses are included in other income, net. The cost basis for realized gains and losses on available-for-sale securities is determined on a specific identification basis. The Company evaluates whether declines in fair values of its investments below their book values are other-than-temporary. When the fair value is lower than the amortized cost, the Company considers whether: ( 1 2 not 3 not not not not On January 1, 2020, 326, 326” 326 not first not not no December 31, 2020. December 31, 2020 90 The Company adjusts the carrying value of non-marketable equity investments to fair value upon observable transactions for identical or similar investments of the same issuer or impairment (referred to as the measurement alternative). All gains and losses on non-marketable equity investments, realized and unrealized, are recognized in other income, net. Inventories Inventories are stated at the lower of cost and net realizable value. Cost is computed using standard cost, which approximates actual cost, on a first first not 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 the related lease term. Repairs and maintenance are charged to expense as incurred. Useful lives by asset category are as follows: Asset Category Years Office equipment 3 Software 3 Leasehold improvements Shorter of lease term or estimated useful life Production equipment 2 - 5 Computer equipment 5 Lab equipment 5 Furniture and fixtures 7 Leases On January 1, 2019, 2016 02, 842 December 31, 2020 2019, not Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. As most of the leases do not may Intangible Assets Intangible assets represent rights acquired for developed technology, customer relationships, contract manufacturing rights, trade names, patents and IPR&D in connection with 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 If events or changes in circumstances indicate that the carrying amount of an asset may not Goodwill Goodwill is recorded when 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 2020, 2019 2018. Internal Use Software Costs Certain external computer software costs acquired for internal use are capitalized. Training costs and maintenance are expensed as incurred, while upgrades and enhancements are capitalized if it is probable that such expenditures will result in additional functionality. Capitalized costs are included within property and equipment. If a cloud computing arrangement includes a software license, then the Company accounts for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not Revenue Recognition The Company recognizes revenue when control of the promised goods or services is transferred to customers in an amount that reflects the consideration the Company expects to receive in exchange for such goods or services. Product Revenue The Company’s products are fully functional at the time of shipment and do not may not December 31, 2020 2019 30 60 Other Revenue Occasionally, the Company enters into license and development agreements with some of its customers and recognizes revenue from these agreements upon completion and acceptance by the customer of contract deliverables or as services are provided, depending on the terms of the arrangement. Revenue is deferred for any amounts billed or received prior to transfer of control or delivery of services. The Company believes the milestone method or input method based on costs incurred best depict the efforts expended to transfer services to the customers under most of the Company’s development agreements. Certain contracts may not The Company does not one 2021 December 31, 2020 Revenue from non-product sales was approximately 7%, 7% and 3% of total revenue for the years ended December 31, 2020, 2019, 2018 On January 1, 2020, 326, December 31, 2020 December 31, 2019 December 31, 2020 Cost of Revenue Cost of revenue includes cost of materials, such as wafers processed by third Warranty The Company’s products are under warranty against defects in material and workmanship generally for a period of one two may December 31, 2020 2019 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. Sales and Marketing Expense Sales and marketing expense consists of salaries, stock-based compensation, employee benefits, travel, trade show costs, amortization of intangibles and other related expenses. The Company expenses sales and marketing costs as incurred. Advertising expenses for the years ended December 31, 2020, 2019 2018 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 other related expenses. 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 The Company regularly performs a comprehensive review of uncertain tax positions. 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 On December 22, 2017, January 1, 2018, one 100% first 21%. 118 118” one 118, December 31, 2017, 21%, 2018, 2017 no December 31, 2018, 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 or graded vesting basis for awards with performance or market-based conditions. The fair value of restricted stock units is based on the fair market value of the Company’s common stock on the date of grant. If the award has a market condition, the Company estimates the fair value using Monte Carlo simulation model and recognizes compensation ratably over the service period unless the award also has a graded vesting feature, in which case, the Company recognizes compensation using graded vesting method. The Company has elected to treat share-based payment awards with graded vesting schedules and time-based service conditions as single awards and recognizes stock-based compensation expense on a straight-line basis (net of estimated forfeitures) over the requisite service period. The Company recognizes non-employee stock-based compensation expense based on the estimated fair value of the equity instrument determined using the Black-Scholes option pricing model or fair value of the Company's common stock. Management believes that the fair value of the underlying stock award is more reliably measured than the fair value of the services received. The fair value of each non-employee variable stock award is re-measured each period until a commitment date is reached, which is generally the vesting date. Starting January 1, 2019, no Earnings per Share Basic earnings per share is calculated by dividing income allocable to common stockholders by the weighted average number of shares of common stock outstanding during the period. Diluted earnings per share is calculated by dividing the net income allocable to common stockholders by the weighted average number of common shares outstanding, adjusted for the effects of potentially dilutive common stock, which are comprised of stock options, restricted stock units, employee share purchase plan and the shares that could be issued upon conversion of the Company’s convertible debt. The capped call options in connection with the issuance of the convertible notes are excluded from the calculation of diluted earnings per share as their impact is always anti-dilutive. Segment Information The Company operates in one reportable segment related to the design, development and sale of high-speed analog connectivity components that operate to maintain, amplify and improve signal integrity at high-speeds in a wide variety of applications. The Company’s chief operating decision-maker is its Chief Executive Officer, who reviews financial and operational information on a consolidated basis for the purpose of evaluating relative performance, progress against strategic objectives and making decisions about investing resources. Recent Accounting Pronouncements In June 2016, 326, April 2019, No. 2019 04, Codification Improvements to Topic 326, 815, 825, 2020, not In August 2018, no 1 2 3 December 15, 2019. January 1, 2020. not In August 2018, 350 40 December 15, 2019. January 1, 2020. not In November 2018, not December 15, 2019, January 1, 2020. not In December 2019, 740, Income Taxe December 15, 2020, not not In August 2020, no December 15, 2021,

Note 2 - Acquisitions

Note 2 - Acquisitions	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Business Combination Disclosure [Text Block]	2. eSilicon On January 10, 2020, 12 36 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. The following table summarizes the purchase price allocation as of the acquisition date: Cash $ 704 Restricted cash 2,100 Accounts receivable 5,750 Inventories 21,086 Prepaid expenses and other current assets 21,012 Property and equipment 7,106 Intangible assets 148,720 Right of use asset 1,022 Other noncurrent assets 252 Accounts payable (9,105 ) Accrued expenses (25,060 ) Deferred revenue (7,501 ) Other current liabilities (13,886 ) Other liabilities (3,567 ) Total identifiable net assets $ 148,633 Goodwill 66,011 Net assets acquired $ 214,644 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) Contract manufacturing rights $ 105,160 5.0 Developed technology 33,630 8.0 Software 9,930 0.5 to 2.0 $ 148,720 Developed technology was valued using the multi-period excess earnings method under the income approach. This method involves discounting the direct cash flows expected to be generated by the technologies over their remaining economic lives, net of returns on contributory assets. The estimated useful life was determined based on the technology cycle related to product family and its expected contribution to forecasted revenue. Contract manufacturing rights were valued using a multi-period excess earnings method, which involved discounting the direct cash flow expected to be generated by these rights over their remaining economic lives, net of returns on contributory assets. The estimated useful life was determined to be five two Goodwill is calculated as the excess of the consideration transferred over the net assets recognized and is attributable to the workforce of eSilicon, the Company’s going concern value with the opportunity to leverage its workforce to develop new technologies and the ability of the Company to grow the business faster and more profitable than was possible by eSilicon as a stand-alone company. Goodwill is not not The Company incurred acquisition costs of $1,550, of which $1,015 was incurred in 2019 2020. December 31, 2020 2019. eSilicon contributed revenue of $144,986 and pre-tax income of $251 for the period from January 10, 2020 December 31, 2020. Prior to the acquisition, the Company owned a minority equity interest in eSilicon. The fair value of the equity interest immediately before the acquisition date was $14,999, which resulted in a gain of $4,999 and was included in other income, net in the consolidated statement of income (loss) for the year ended December 31, 2020. Arrive On May 18, 2020, 12 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 based on their estimated fair values. The fair value of the identifiable intangible asset 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 preliminary purchase price allocation as of the acquisition date: Inventories $ 126 Developed technology 8,840 Total identifiable net assets 8,966 Goodwill 11,175 Net assets acquired $ 20,141 The estimated fair value of developed technology was $8,840 with an estimated useful life of five Goodwill is calculated as the excess of the consideration transferred over the net assets recognized and is attributable to the workforce of Arrive, the Company’s going concern value with the opportunity to leverage its workforce to develop new technologies and the ability of the Company to grow the business faster and more profitable than was possible by Arrive as a stand-alone company. Since this is an asset purchase agreement, the goodwill is amortized and is deductible for tax purposes. The Company incurred acquisition costs of $180 included in general and administrative expense in the consolidated statement of income (loss) for the year ended December 31, 2020. Arrive contributed revenue of $5,614 and pre-tax loss of $491 to the Company for the period from May 18, 2020 December 31, 2020. 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, 2020 2019, January 1, 2019. Year Ended December 31, 2020 2019 (unaudited) Revenue $ 691,066 $ 470,626 Net loss $ (54,500 ) $ (134,568 ) The unaudited pro forma financial information was prepared using the acquisition method of accounting and are based on the historical financial information of the Company, eSilicon and Arrive, reflecting the results of operations for the years ended December 31, 2020 2019. not not

Note 3 - Investments

Note 3 - Investments	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Investment [Text Block]	3 . Investments The following table summarizes the investments by investment category: December 31, 2020 Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value Available-for-sale securities: Municipal bonds $ 18,844 $ 96 — $ 18,940 Corporate notes/bonds 39,138 408 — 39,546 Asset-backed securities 2,500 4 — 2,504 Commercial paper 2,399 — — 2,399 Total investments $ 62,881 $ 508 $ — $ 63,389 December 31, 2019 Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value Available-for-sale securities: U.S. Treasury securities $ 3,752 $ 7 $ — $ 3,759 Municipal bonds 6,062 57 — 6,119 Corporate notes/bonds 118,859 591 (1 ) 119,449 Asset-backed securities 4,239 29 — 4,268 Commercial paper 6,464 1 (1 ) 6,464 Certificate of deposit 72 — — 72 Total investments $ 139,448 $ 685 $ (2 ) $ 140,131 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, net in the consolidated statements of income (loss). Contractual maturities of available-for-sale securities at December 31, 2020 Cost Fair Value Due in one year or less $ 53,585 $ 53,902 Due between one and five years 9,296 9,487 $ 62,881 $ 63,389 The Company has a marketable equity investment in a company located in Taiwan. The fair value of the investment and unrealized loss as of December 31, 2020 December 31, 2019 December 31, 2019, The Company has non-marketable equity investments in privately held companies without readily determinable market values. The Company adjusts the carrying value of non-marketable equity investments to fair value upon observable transactions for identical or similar investments of the same issuer or impairment (referred to as the measurement alternative). All gains and losses on non-marketable equity investments, realized and unrealized, are recognized in other income, net. As of December 31, 2020 December 31, 2020 December 31, 2019, December 31, 2019. December 31, 2020, 2019 2018 December 31, 2018, not

Note 4 - Concentrations

Note 4 - Concentrations	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	4 . Concentrations Financial instruments that subject the Company to concentrations of credit risk consist primarily of cash, cash equivalents, investments in marketable securities and trade accounts receivable. The Company extends differing levels of credit to customers and does not December 31, 2020 December 31, 2019 December 31, 2020 2019 The following table summarizes the significant customers’ (including distributors) accounts receivable and revenue as a percentage of total accounts receivable and total revenue, respectively: December 31, Accounts Receivable 2020 2019 Customer A 11 % 15 % Customer B * 13 Customer C 12 * Customer D 18 19 Customer E 11 * Year Ended December 31, Revenue 2020 2019 2018 Customer A 12 % 14 % 18 % Customer B * * * Customer C * 11 * Customer D 14 * * Customer E 15 * 11 * Less than 10% Customer A is a subcontractor of a direct customer that would be a “Customer F” December 31, 2020, 2019 2018, December 31, 2019 2018, December 31, 2018.

Note 5 - Inventories

Note 5 - Inventories	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Inventory Disclosure [Text Block]	5 . Inventories Inventories consist of the following: December 31, 2020 2019 Raw materials $ 50,626 $ 18,593 Work in process 33,946 19,081 Finished goods 26,831 17,339 $ 111,403 $ 55,013

Note 6 - Property and Equipment

Note 6 - Property and Equipment, Net	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	6 . Property and Equipment, net Property and equipment consist of the following: December 31, 2020 2019 Laboratory and production equipment $ 195,132 $ 144,866 Office, software and computer equipment 47,656 37,241 Furniture and fixtures 3,566 1,617 Leasehold improvements 20,338 8,282 266,692 192,006 Less accumulated depreciation (133,136 ) (112,443 ) $ 133,556 $ 79,563 Depreciation and amortization expense for the years ended December 31, 2020, 2019 2018 As of December 31, 2020 2019 December 31, 2020, 2019 2018 Property and equipment not December 31, 2020 2019

Note 7 - Intangible Assets, Net

Note 7 - Intangible Assets, Net	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Goodwill and Intangible Assets Disclosure [Text Block]	7 . Intangible Assets, net The following table presents details of intangible assets: December 31, 2020 December 31, 2019 Gross Accumulated Amortization Net Gross Accumulated Amortization Net Developed technology $ 229,270 $ 151,529 $ 77,741 $ 186,800 $ 123,365 $ 63,435 Customer relationships 70,540 41,136 29,404 70,540 31,409 39,131 Trade name 2,310 2,044 266 2,310 1,766 544 Patents 1,579 1,109 470 1,579 1,010 569 Contract manufacturing rights 98,749 19,207 79,542 — — — Software 78,547 34,337 44,210 74,022 9,411 64,611 $ 480,995 $ 249,362 $ 231,633 $ 335,251 $ 166,961 $ 168,290 During the year ended December 31, 2018, The following table presents amortization of intangible assets for the years ended December 31, 2020, 2019 2018 Year Ended December 31, 2020 2019 2018 Cost of revenue $ 53,782 $ 36,987 $ 32,845 Research and development 27,831 22,305 19,311 Sales and marketing 9,727 9,728 9,727 General and administrative 377 545 609 $ 91,717 $ 69,565 $ 62,492 Based on the amount of intangible assets subject to amortization at December 31, 2020 five 2021 $ 80,442 2022 69,010 2023 41,663 2024 26,394 2025 5,459 Thereafter 8,665 $ 231,633 The weighted-average amortization periods remaining by intangible asset category were as follows (in years): Developed technology 4.3 Customer relationship 3.0 Contract manufacturing rights 4.0 Trade name 1.0 Patents 7.0 Software 1.8

Note 8 - Leases

Note 8 - Leases	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Lessee, Operating Leases [Text Block]	8. The Company has operating leases for office facilities. The leases have remaining lease terms of one ten may five Information related to operating leases are as follows: Year Ended December 31, 2020 2019 (in thousands) Operating lease expense $ 8,507 $ 5,094 Cash paid for leases $ 6,868 $ 4,585 Right of use assets obtained in exchange for lease obligations $ 4,161 $ 27,639 Weighted average remaining lease term and weighted average discount are as follows: December 31, 2020 2019 Weighted average remaining lease term (years) 8.09 8.52 Weighted average discount rate 3.8 % 3.9 % Future minimum lease payments under non-cancellable leases as of December 31, 2020 2021 $ 7,045 2022 7,117 2023 7,076 2024 6,751 2025 4,200 Thereafter 19,791 Total future minimum lease payments 51,980 Less: Imputed interest 7,624 Lease incentive recognized as offset to lease liability 1,092 Present value of lease obligations $ 43,264 For the year ended December 31, 2018,

Note 9 - Convertible Debt

Note 9 - Convertible Debt	12 Months Ended
	Dec. 31, 2020
Convertible Debt [Member]
Notes to Financial Statements
Debt Disclosure [Text Block]	9 . Convertible Debt The carrying value of the Company's long-term debt consists of the following: December 31, December 31, 2020 2019 Principal $ 566,517 $ 517,500 Less: Unamortized debt discount (93,187 ) (38,105 ) Unamortized debt issuance costs (9,637 ) (3,217 ) Net carrying amount of convertible debt 463,693 476,178 Less current portion of convertible debt 58,004 217,467 Convertible debt, non-current portion $ 405,689 $ 258,711 Convertible Notes 2015 In December 2015, 2020 2015 2015 December 1, 2020, 2015 June 1 December 1 June 1, 2016. $1 2015, 2015 not Prior to the close of business on the business day immediately preceding June 1, 2020, 2015 March 31, 2016 ( not $1 2015, June 1, 2020, second may The Convertible Notes 2015 not The Convertible Notes 2015 2015 2015 not 2015 In accounting for the issuance of the Convertible Notes 2015, 2015 not 2015 2015 Interest expense for the Convertible Note 2015 Year Ended December 31, 2020 2019 2018 Contractual interest expense $ 1,245 $ 2,586 $ 2,587 Amortization of debt discount 5,902 11,645 10,833 Amortization of debt issuance costs 534 1,050 976 Total interest expense $ 7,681 $ 15,281 $ 14,396 In connection with the issuance of the Convertible Notes 2015, 2015 2015, 2015, 2015 815 40, The purchased Capped Call 2015 2015 2015 2015 2015 The Capped Call 2015 not 2015 not 2015. On December 1, 2020, 2015 2015 Convertible Notes 2016 In September 2016, 2021 2016 2016 September 1, 2021, 2016 March 1 September 1 March 1, 2017. $1 2016, 2016 not Prior to the close of business on the business day immediately preceding March 1, 2021, may 2016 December 31, 2016 ( not $1 2016, March 1, 2021, second may may 2016 The Convertible Notes 2016 not The Convertible Notes 2016 2016 2016 not 2016 2016 2016 2016, may, 2016 2016 2016 2016 2016. In accounting for the issuance of the Convertible Notes 2016, 2016 not 2016 2016 Interest expense for the Convertible Notes 2016 Year Ended December 31, 2020 2019 2018 Contractual interest expense $ 1,159 $ 2,152 $ 2,156 Amortization of debt discount 8,344 14,472 13,481 Amortization of debt issuance costs 684 1,186 1,104 Total interest expense $ 10,187 $ 17,810 $ 16,741 In connection with the issuance of the Convertible Notes 2016, 2016 2016, 2016, 2016 815 40, The purchased Capped Call 2016 2016 2016 2016 2016 2016 The Capped Call 2016 not 2016 not 2016. Convertible Notes 2020 In April 2020, 2025 2020” 2015 2016, 2020 April 15, 2025, 2020 April 15 October 15 October 15, 2020. $1 2020, 2020 100% not Prior to the close of business on the business day immediately preceding October 15, 2024, may 2020 June 30, 2020 ( not 130% 2020 five five 2020 $1 2020 98% 2020 second October 15, 2024 second may 2020 2020, may 2020 The Company may not 2020 April 20, 2023. may 2020, April 20, 2023 not 2020 Upon the occurrence of certain fundamental changes, the holders of the Convertible Notes 2020 may 2020 2020, The Convertible Notes 2020 April 24, 2020 ( 2020” 2020 not 2020 not 2020 may 2020, 2020 2020 2020 2020. December 31, 2020, none 2020 In accounting for the issuance of the Convertible Notes 2020, 2020 not 2020 2020 Interest expense for the Convertible Notes 2020 December 31, 2020 Year Ended December 31, 2020 Contractual interest expense $ 2,605 Amortization of debt discount 12,512 Amortization of debt issuance costs 1,301 Total interest expense $ 16,418 In connection with the issuance of the Convertible Notes 2020, 2020” 2020, 2020, 2020 2020 815 40, The purchased Capped Call 2020 2020 2020 2020 2020 2020 The Capped Call 2020 not 2020 not 2020. Repurchase of Convertible Notes During the year ended December 31, 2020, 2015 2016, The net carrying amount of the liability component of the convertible debt immediately prior to the repurchase was as follows: Convertible Notes 2015 Convertible Notes 2016 Principal $ 180,454 $ 226,983 Unamortized debt discount (5,596 ) (15,940 ) Unamortized debt issuance costs (504 ) (1,304 ) Total $ 174,354 $ 209,739 The loss on early extinguishment of debt is calculated as follows: Convertible Notes 2015 Convertible Notes 2016 Repurchase consideration allocated to the liability component $ 177,622 $ 220,010 Net carrying value of debt (174,354 ) (209,739 ) Loss on early extinguishment $ 3,268 $ 10,271 The repurchase consideration allocated to the equity component of $299,458 and $273,975 for the Convertible Notes 2015 2016, 2015 2016, The conversion condition for the Convertible Notes 2016 December 31, 2020. December 31, 2020, 2016 December 31, 2020. January 1 February 25, 2021, 2016 January 1 February 25, 2021,

Note 10 - Other Liabilities

Note 10 - Other Liabilities	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Other Liabilities Disclosure [Text Block]	10. Other current liabilities consist of the following: December 31, 2020 2019 Software license intangible asset liabilities $ 28,234 $ 25,810 Operating lease liabilities 4,322 2,545 Others 13,374 5,176 $ 45,930 $ 33,531 Other long-term liabilities consist of the following: December 31, 2020 2019 Income tax payable $ 1,078 $ 692 Deferred tax liabilities 1,311 — Software license intangible asset liabilities 13,885 36,144 Operating lease liabilities 38,942 41,074 Others 3,104 1,007 $ 58,320 $ 78,917

Note 11 - Income Taxes

Note 11 - Income Taxes	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Income Tax Disclosure [Text Block]	11 . Income Taxes Income (loss) before income taxes consists of the following: Year Ended December 31, 2020 2019 2018 United States $ (124,926 ) $ (60,313 ) $ (71,978 ) Foreign 69,636 (12,202 ) (31,984 ) Total $ (55,290 ) $ (72,515 ) $ (103,962 ) Income tax provision (benefit) consisted of the following: Year Ended December 31, 2020 2019 2018 Current: U.S. Federal $ — $ — $ — U.S. State 2 (11 ) 42 Foreign 749 70 375 751 59 417 Deferred: U.S. Federal — — (6,734 ) U.S. State — — — Foreign 3,703 337 (1,894 ) 3,703 337 (8,628 ) Total $ 4,454 $ 396 $ (8,211 ) Provision (benefit) for income taxes differed from the amounts computed by applying the U.S. federal income tax rate of 21% in 2020 2019 2018 Year Ended December 31, 2020 2019 2018 Benefit at statutory rate $ (11,611 ) $ (15,228 ) $ (21,832 ) State income taxes (451 ) (587 ) 594 Research and development credits (26,596 ) (16,933 ) (13,283 ) Change in valuation allowance 81,799 31,917 13,757 Impact of foreign operations (10,402 ) (1,045 ) 5,925 Unrecognized tax benefits 2,809 6,725 5,340 Stock-based compensation (42,683 ) (4,731 ) (381 ) Prior year return to provision adjustment (1,190 ) (1,167 ) 1,422 Section 162(m) 5,076 1,046 — Transaction costs 1,498 190 — Convertible debt (2,171 ) — — GILTI 8,484 — — Other (108 ) 209 247 $ 4,454 $ 396 $ (8,211 ) Significant components of the Company’s net deferred taxes consist of the following: December 31, 2020 2019 Deferred tax assets Net operating loss carry forwards $ 116,570 $ 48,481 Research and development credits 106,555 84,268 Stock-based compensation 9,998 8,884 Accrued expenses and allowances 2,910 1,897 Operating lease liability 8,474 7,345 Other temporary differences 14,961 6,884 Foreign tax credit 2,522 2,338 Valuation allowance (207,315 ) (123,989 ) Total deferred tax assets 54,675 36,108 Deferred tax liabilities Acquired intangible assets (33,236 ) (16,092 ) Convertible debt (9,059 ) (6,444 ) Amortization and depreciation (4,787 ) (2,123 ) Right of use asset (5,856 ) (6,806 ) Other deferred tax liabilities (2,205 ) (1,482 ) Total deferred tax liabilities (55,143 ) (32,947 ) Deferred tax assets (liabilities), net $ (468 ) $ 3,161 On December 22, 2017, 21% January 1, 2018, one 100% first 2017, 118. 2017, one During 2018, 2017 no The Tax Reform Act subjects a U.S. shareholder to tax on GILTI earned by certain foreign subsidiaries. In January 2018, December 31, 2020 Valuation Allowance The Company records a valuation allowance to reduce deferred tax assets to the amount the Company believes is more likely than not may may not may At December 31, 2020, 2019 2018, The valuation allowance increased $83,326, $31,674 and $13,777 in the years ended December 31, 2020, 2019 2018 The net increase of $83,326 in the valuation allowance for the year ended December 31, 2020 $31,674 December 31, 2019 December 31, 2018 General Income Tax Disclosures The Company has net operating loss (“NOL”) carryforwards for federal and state income tax purposes of approximately $589,232 and $138,341, respectively at December 31, 2020 2021 2023 2018, 2019 2020 not December 31, 2020 2021, not At December 31, 2020 2024. 2021 not December 31, 2020 2028, not Pursuant to Internal Revenue Code of 1986, 382 383, June 2004 two one December 2000 second June 2004, 2014, 2016 2020, 382 383. 382. not not The Company’s NOL carryforwards include Cortina’s federal and state pre-acquisition NOL of $49,152 and $3,919, respectively. These NOL carryforwards will begin to expire in 2024 2026 2032 2028 2021 2023 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 5.5% effective through April 2025. 17% December 31, 2020, December 2023. December 31, 2020, December 31, 2020, 2019 2018, December 31, 2020, 2019 2018, The following table summarizes the changes in gross unrecognized tax benefits: Year Ended December 31, 2020 2019 2018 Balance as of January 1 $ 61,300 $ 53,943 $ 47,606 Increases based on tax positions related to the current year 11,855 7,926 5,747 Increases (decreases) based on tax positions of prior year (10,885 ) (518 ) 708 Gross increase for acquired unrecognized tax benefits 453 — — Statute of limitation expirations (58 ) (51 ) (118 ) Balance as of December 31 $ 62,665 $ 61,300 $ 53,943 As of December 31, 2020 may The Company recognizes interest and penalties related to unrecognized tax benefits as a component of income tax expense. The Company recorded $15, $16 and $17 in interest expense in the years ended December 31, 2020, 2019 2018 December 31, 2020, 2019 2018 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 Company does not December 31, 2020 The Company is currently under examination by the Inland Revenue Authority of Singapore (“IRAS”) for the years 2010 2015. not In May 2020, 2016 no no On March 27, 2020, not

Note 12 - Earnings Per Share

Note 12 - Earnings Per Share	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Earnings Per Share [Text Block]	12. The following securities were not Year Ended December 31, 2020 2019 2018 Common stock options 665,015 1,032,485 1,208,643 Unvested restricted stock unit 2,827,932 2,772,991 2,871,135 Convertible debt 8,304,801 10,830,038 10,830,038 11,797,748 14,635,514 14,909,816

Note 13 - Stock-based Compensat

Note 13 - Stock-based Compensation	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	13 . Stock- Based Compensation In June 2010, 2010 “2010 November 2010. 2010 2010 2010 December 31, 2020 2010 Stock Option Awards The Company did not December 31, 2020, 2019 2018 The following table summarizes information regarding options outstanding: Number of Shares Weighted Average Exercise Price Per Share Weighted Average Remaining Contractual Life Aggregate Intrinsic Value Outstanding at December 31, 2019 905,141 $ 13.68 1.81 $ 54,616 Exercised (812,710 ) $ 13.77 Outstanding at December 31, 2020 92,431 $ 12.89 1.08 $ 13,641 Vested and Exercisable as of December 31, 2020 92,431 $ 12.89 1.08 $ 13,641 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, 2020, 2019 2018 December 31, 2020, 2019 2018 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: Weighted Average Grant Date Number of Fair Value Shares Per Share Outstanding at December 31, 2019 3,822,325 $ 41.38 Granted 1,455,465 $ 88.70 Vested (1,886,008 ) $ 44.77 Canceled (95,531 ) $ 56.16 Outstanding at December 31, 2020 3,296,251 $ 59.90 Expected to vest in the future as of December 31, 2020 3,265,609 The RSUs include performance-based stock units subject to achievement of pre-established revenue and earnings per share goals on a non-GAAP basis. Once the goals are met, the performance-based stock units are subject to four December 31, 2020 Market Value Stock Units In January 2018, may 500 three first 2021 2020 may three three Total target shares 312,000 Fair value per share $ 55.81 Total amount to be recognized over the service period $ 17,413 Risk free interest rate 2.29 % Expected volatility 47.52 % Dividend yield — In December 2020, In February 2020, may 0% 500 two three two three February 9, 2022 2023, may two three two three Two-Year Term Three-Year Term Total target shares 53,448 101,775 Fair value per share $ 119.90 $ 125.30 Total amount to be recognized over the service period $ 6,408 $ 12,752 Risk free interest rate 1.41 % 1.38 % Expected volatility 41.37 % 43.79 % Dividend yield — — Employee Stock Purchase Plan In December 2011, may not six February 10 August 10 six The ESPP imposes certain limitations upon an employee’s right to acquire common stock, including the following: (i) no no may December 31, 2020, 2019 2018 The fair value of award under the 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, 2020, 2019 2018 Year Ended December 31, 2020 2019 2018 Risk-free interest rate 0.87 % 2.26 % 2.01 % Expected life (in years) 0.49 0.49 0.50 Dividend yield — — — Expected volatility 50 % 43 % 46 % Estimated fair value $ 29.17 $ 13.35 $ 8.35 Stock-Based Compensation Expense Stock-based compensation expense is included in the Company’s results of operations as follows: Year Ended December 31, 2020 2019 2018 Cost of revenue $ 7,859 $ 6,208 $ 2,527 Research and development 62,768 42,265 37,397 Sales and marketing 22,990 15,561 13,470 General and administrative 17,630 12,821 10,490 $ 111,247 $ 76,855 $ 63,884 As of December 31, 2020

Note 14 - Employee Benefit Plan

Note 14 - Employee Benefit Plan	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Compensation and Employee Benefit Plans [Text Block]	14 . Employee Benefit Plan The Company has established a 401 401 may, $1,976 and $1,800 in c December 31, 2020, 2019 2018,

Note 15 - Fair Value Measuremen

Note 15 - Fair Value Measurements	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Fair Value Disclosures [Text Block]	15 . Fair Value Measurements The guidance on fair value measurements requires fair value measurements to be classified and disclosed in one three Level 1 Level 2 not Level 3 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 costs. The Convertible Notes are not December 31, 2020 2019 2 December 31, 2020 2019 The following table presents information about assets required to be carried at fair value on a recurring basis: December 31, 2020 Total Level 1 Level 2 Assets Cash equivalents: Money market funds $ 21,044 $ 20,408 $ 636 Commercial paper 18,297 — 18,297 Investments in marketable securities: Municipal bonds 18,940 — 18,940 Corporate notes/bonds 39,546 — 39,546 Asset-backed securities 2,504 — 2,504 Commercial paper 2,399 — 2,399 $ 102,730 $ 20,408 $ 82,322 December 31, 2019 Total Level 1 Level 2 Assets Cash equivalents: Money market funds $ 190,598 $ 67,494 $ 123,104 Commercial paper 9,465 — 9,465 Municipal bonds 1,250 — 1,250 Investments in marketable securities: U.S. Treasury securities 3,759 3,759 — Municipal bonds 6,119 — 6,119 Corporate notes/bonds 119,449 — 119,449 Asset-backed securities 4,268 — 4,268 Commercial paper 6,464 — 6,464 Certificate of deposit 72 72 — $ 341,444 $ 71,325 $ 270,119 As discussed in Note 3, 1 3, 3

Note 16 - Segment and Geographi

Note 16 - Segment and Geographic Information	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	16 . Segment and Geographic Information The Company operates in one may The following table sets forth the Company’s revenue by geographic region: Year Ended December 31, 2020 2019 2018 (in thousands) China $ 365,170 $ 164,715 $ 113,684 United States 162,978 103,402 87,545 Thailand 70,771 54,468 40,884 Other 84,035 43,050 52,377 $ 682,954 $ 365,635 $ 294,490 As of December 31, 2020 December 31, 2019

Note 17 - Commitments and Conti

Note 17 - Commitments and Contingencies	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	17 . Commitments and Contingencies Leases The Company has noncancelable service agreements, including software licenses, colocation and cloud services used in research and development activities expiring in various years through 2025. Future minimum payments under noncancelable service agreements having initial terms in excess of one December 31, 2020 2021 $ 391 2022 119 2023 47 2024 46 2025 37 $ 640 Noncancelable Purchase Obligations The Company depends upon third December 31, 2020 December 31, 2020 f . 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, 120 As to the proceeding at the USPTO, reexamination has been ordered and concluded for all of the patents that Netlist alleged to infringe. The Reexamination Certificate for U.S. Patent No. 7,532,537 August 2, 2016 No. 7,636,274 November 5, 2018, 1 97, No. 7,619,912 February 8, 2021, While the Company intends to defend the lawsuit vigorously to the extent that Netlist has valid claims remaining in view of the USPTO proceedings, the litigation, whether or not Due to the nature of the 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. Claims Against eSilicon Corporation In connection with the Company's acquisition of eSilicon, eSilicon and the Company have received written communications from certain former stockholders of eSilicon demanding to inspect eSilicon’s books and records and indicating that such stockholders will be seeking appraisal of shares they held in eSilicon. Certain of these former eSilicon stockholders also have stated that they may On May 11, 2020, three No. 2020 0356 June 4, 2020, 262 December 31, 2020, On December 23, 2020, seven No. 2020 1099 January 19, 2021, 262 no The Company is unaware of any other petition for appraisal or lawsuit that has been filed by any former eSilicon stockholder. The Company plans to vigorously defend against lawsuits arising out of or relating to the merger agreement and/or the merger that may From time to time, the Company is involved in certain other litigation matters but does not may Indemnifications In the ordinary course of business, the Company may not third may may not not no December 31, 2020 December 31, 2019

Note 18 - Pending Merger with M

Note 18 - Pending Merger with Marvell Technology	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Merger Agreement Disclosures [Text Block]	18. On October 29, 2020, Pursuant to the Merger Agreement, and upon the terms and subject to the conditions described therein, (i) at the effective time of the Bermuda Merger, all issued and outstanding common shares of Marvell (other than shares held by Marvell in Marvell’s treasury or held by HoldCo, Bermuda Merger Sub or any other subsidiary of Marvell) will be automatically converted into the right to receive one share of common stock of HoldCo (“HoldCo Common Stock”) and (ii) at the effective time of the Delaware Merger, all outstanding shares of common stock of the Company (other than ( x not If the Merger Agreement is terminated under certain circumstances, an alternative acquisition proposal had previously been made with respect to the Company, and within 12 If the Merger Agreement is terminated because of certain triggering events by Marvell, including Marvell’s board of directors changing or withdrawing its recommendation regarding the Mergers, or failing to reaffirm its support for the Mergers in certain circumstances, Marvell would be obligated to pay the Company a fee equal to $400,000. Marvell would also be obligated to pay this fee if it elects to terminate the Merger Agreement to enter into certain superior acquisition transactions. Additionally, if the Merger Agreement is terminated due to failure to receive certain regulatory approvals or because of the existence of certain government orders or litigations, Marvell would be obligated to pay the Company a fee equal to $460,000. If the Merger Agreement is terminated due to the failure to obtain the Company’s stockholder approval or Marvell’s shareholder approval, the party whose stockholders did not

Note 19 - Subsequent Event

Note 19 - Subsequent Event	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Subsequent Events [Text Block]	19. In February 2021,

Note 20 - Supplementary Financi

Note 20 - Supplementary Financial Information (Unaudited)	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Quarterly Financial Information [Text Block]	20. Quarterly Results of Operations Year Ended December 31, 2020(1)(3) Mar. 31, 2020 Jun. 30, 2020(2)(4) Sept. 30, 2020 Dec. 31, 2020 (in thousands, except per share amounts) Revenue $ 139,430 $ 175,292 $ 180,691 $ 187,541 Gross profit 73,697 92,932 101,540 102,962 Net loss (20,286 ) (24,051 ) (3,380 ) (12,027 ) Basic earnings per share (0.44 ) (0.49 ) (0.07 ) (0.23 ) Diluted earnings per share (0.44 ) (0.49 ) (0.07 ) (0.23 ) Year Ended December 31, 2019 Mar. 31, 2019 Jun. 30, 2019 Sept. 30, 2019 Dec. 31, 2019 (in thousands, except per share amounts) Revenue $ 82,223 $ 86,285 $ 94,231 $ 102,896 Gross profit 47,631 49,109 54,482 61,599 Net loss (22,745 ) (20,578 ) (16,180 ) (13,408 ) Basic earnings per share (0.51 ) (0.46 ) (0.36 ) (0.29 ) Diluted earnings per share (0.51 ) (0.46 ) (0.36 ) (0.29 ) ( 1 On January 10, 2020 May 18, 2020, ( 2 In April 2020, April 15, 2025. ( 3 In 2020, 2015 2016, ( 4 The income tax expense included a reversal of certain unrecognized tax benefit as a result of the Internal Revenue Service exam conclusion with a no no

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
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 the Company 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 uses its best estimates and assumptions to accurately value assets acquired and liabilities assumed at the acquisition date as well as contingent consideration, where applicable, the estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may 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, the Company evaluates its estimates and judgments compared to historical experience and expected trends. On an ongoing basis, management evaluates its estimates, including those related to (i) the accounts receivable credit losses 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 measurement of non-marketable 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 In March 2020, 19 19 December 31, 2020 not not 19 19 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 loss in 2020, 2019 2018
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 Certain Financial Instruments The carrying amount reflected in the balance sheet for cash and cash equivalents, accounts receivable, prepaid and other current assets, accounts payable and other current liabilities, approximate fair value due to the short-term nature of these financial instruments.
Investment, Policy [Policy Text Block]	Investments Investments in marketable securities consist of available-for-sale securities. These investments are recorded at fair value with changes in fair value, net of applicable taxes, recorded as unrealized gains (losses) as a component of accumulated other comprehensive income in stockholders' equity. Realized gains and losses are included in other income, net. The cost basis for realized gains and losses on available-for-sale securities is determined on a specific identification basis. The Company evaluates whether declines in fair values of its investments below their book values are other-than-temporary. When the fair value is lower than the amortized cost, the Company considers whether: ( 1 2 not 3 not not not not On January 1, 2020, 326, 326” 326 not first not not no December 31, 2020. December 31, 2020 90 The Company adjusts the carrying value of non-marketable equity investments to fair value upon observable transactions for identical or similar investments of the same issuer or impairment (referred to as the measurement alternative). All gains and losses on non-marketable equity investments, realized and unrealized, are recognized in other income, net.
Inventory, Policy [Policy Text Block]	Inventories Inventories are stated at the lower of cost and net realizable value. Cost is computed using standard cost, which approximates actual cost, on a first first not
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 the related lease term. Repairs and maintenance are charged to expense as incurred. Useful lives by asset category are as follows: Asset Category Years Office equipment 3 Software 3 Leasehold improvements Shorter of lease term or estimated useful life Production equipment 2 - 5 Computer equipment 5 Lab equipment 5 Furniture and fixtures 7
Lessee, Leases [Policy Text Block]	Leases On January 1, 2019, 2016 02, 842 December 31, 2020 2019, not Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. As most of the leases do not may
Intangible Assets, Finite-Lived, Policy [Policy Text Block]	Intangible Assets Intangible assets represent rights acquired for developed technology, customer relationships, contract manufacturing rights, trade names, patents and IPR&D in connection with business acquisitions. Intangible assets with finite useful lives are amortized over periods ranging from one ten
Impairment or Disposal of Long-Lived 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 If events or changes in circumstances indicate that the carrying amount of an asset may not
Goodwill and Intangible Assets, Policy [Policy Text Block]	Goodwill Goodwill is recorded when 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 2020, 2019 2018.
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. If a cloud computing arrangement includes a software license, then the Company accounts for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not
Revenue [Policy Text Block]	Revenue Recognition The Company recognizes revenue when control of the promised goods or services is transferred to customers in an amount that reflects the consideration the Company expects to receive in exchange for such goods or services. Product Revenue The Company’s products are fully functional at the time of shipment and do not may not December 31, 2020 2019 30 60 Other Revenue Occasionally, the Company enters into license and development agreements with some of its customers and recognizes revenue from these agreements upon completion and acceptance by the customer of contract deliverables or as services are provided, depending on the terms of the arrangement. Revenue is deferred for any amounts billed or received prior to transfer of control or delivery of services. The Company believes the milestone method or input method based on costs incurred best depict the efforts expended to transfer services to the customers under most of the Company’s development agreements. Certain contracts may not The Company does not one 2021 December 31, 2020 Revenue from non-product sales was approximately 7%, 7% and 3% of total revenue for the years ended December 31, 2020, 2019, 2018 On January 1, 2020, 326, December 31, 2020 December 31, 2019 December 31, 2020
Cost of Goods and Service [Policy Text Block]	Cost of Revenue Cost of revenue includes cost of materials, such as wafers processed by third
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, 2020 2019
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.
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 other related expenses. The Company expenses sales and marketing costs as incurred. Advertising expenses for the years ended December 31, 2020, 2019 2018 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 other related expenses. 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 The Company regularly performs a comprehensive review of uncertain tax positions. 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 On December 22, 2017, January 1, 2018, one 100% first 21%. 118 118” one 118, December 31, 2017, 21%, 2018, 2017 no December 31, 2018,
Share-based Payment Arrangement [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 or graded vesting basis for awards with performance or market-based conditions. The fair value of restricted stock units is based on the fair market value of the Company’s common stock on the date of grant. If the award has a market condition, the Company estimates the fair value using Monte Carlo simulation model and recognizes compensation ratably over the service period unless the award also has a graded vesting feature, in which case, the Company recognizes compensation using graded vesting method. The Company has elected to treat share-based payment awards with graded vesting schedules and time-based service conditions as single awards and recognizes stock-based compensation expense on a straight-line basis (net of estimated forfeitures) over the requisite service period. The Company recognizes non-employee stock-based compensation expense based on the estimated fair value of the equity instrument determined using the Black-Scholes option pricing model or fair value of the Company's common stock. Management believes that the fair value of the underlying stock award is more reliably measured than the fair value of the services received. The fair value of each non-employee variable stock award is re-measured each period until a commitment date is reached, which is generally the vesting date. Starting January 1, 2019, no
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 reportable segment related to the design, development and sale of high-speed analog connectivity components that operate to maintain, amplify and improve signal integrity at high-speeds in a wide variety of applications. The Company’s chief operating decision-maker is its Chief Executive Officer, who reviews financial and operational information on a consolidated basis for the purpose of evaluating relative performance, progress against strategic objectives and making decisions about investing resources.
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements In June 2016, 326, April 2019, No. 2019 04, Codification Improvements to Topic 326, 815, 825, 2020, not In August 2018, no 1 2 3 December 15, 2019. January 1, 2020. not In August 2018, 350 40 December 15, 2019. January 1, 2020. not In November 2018, not December 15, 2019, January 1, 2020. not In December 2019, 740, Income Taxe December 15, 2020, not not In August 2020, no December 15, 2021,

Note 1 - Organization and Sum_2

Note 1 - Organization and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
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 - 5 Computer equipment 5 Lab equipment 5 Furniture and fixtures 7

Note 2 - Acquisitions (Tables)

Note 2 - Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	Cash $ 704 Restricted cash 2,100 Accounts receivable 5,750 Inventories 21,086 Prepaid expenses and other current assets 21,012 Property and equipment 7,106 Intangible assets 148,720 Right of use asset 1,022 Other noncurrent assets 252 Accounts payable (9,105 ) Accrued expenses (25,060 ) Deferred revenue (7,501 ) Other current liabilities (13,886 ) Other liabilities (3,567 ) Total identifiable net assets $ 148,633 Goodwill 66,011 Net assets acquired $ 214,644 Inventories $ 126 Developed technology 8,840 Total identifiable net assets 8,966 Goodwill 11,175 Net assets acquired $ 20,141
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]	Estimated Fair Value Estimated Useful Life (Years) Contract manufacturing rights $ 105,160 5.0 Developed technology 33,630 8.0 Software 9,930 0.5 to 2.0 $ 148,720
Business Acquisition, Pro Forma Information [Table Text Block]	Year Ended December 31, 2020 2019 (unaudited) Revenue $ 691,066 $ 470,626 Net loss $ (54,500 ) $ (134,568 )

Note 3 - Investments (Tables)

Note 3 - Investments (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Available-for-sale Securities [Table Text Block]	December 31, 2020 Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value Available-for-sale securities: Municipal bonds $ 18,844 $ 96 — $ 18,940 Corporate notes/bonds 39,138 408 — 39,546 Asset-backed securities 2,500 4 — 2,504 Commercial paper 2,399 — — 2,399 Total investments $ 62,881 $ 508 $ — $ 63,389 December 31, 2019 Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value Available-for-sale securities: U.S. Treasury securities $ 3,752 $ 7 $ — $ 3,759 Municipal bonds 6,062 57 — 6,119 Corporate notes/bonds 118,859 591 (1 ) 119,449 Asset-backed securities 4,239 29 — 4,268 Commercial paper 6,464 1 (1 ) 6,464 Certificate of deposit 72 — — 72 Total investments $ 139,448 $ 685 $ (2 ) $ 140,131
Investments Classified by Contractual Maturity Date [Table Text Block]	Cost Fair Value Due in one year or less $ 53,585 $ 53,902 Due between one and five years 9,296 9,487 $ 62,881 $ 63,389

Note 4 - Concentrations (Tables

Note 4 - Concentrations (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]	December 31, Accounts Receivable 2020 2019 Customer A 11 % 15 % Customer B * 13 Customer C 12 * Customer D 18 19 Customer E 11 * Year Ended December 31, Revenue 2020 2019 2018 Customer A 12 % 14 % 18 % Customer B * * * Customer C * 11 * Customer D 14 * * Customer E 15 * 11

Note 5 - Inventories (Tables)

Note 5 - Inventories (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Inventory, Current [Table Text Block]	December 31, 2020 2019 Raw materials $ 50,626 $ 18,593 Work in process 33,946 19,081 Finished goods 26,831 17,339 $ 111,403 $ 55,013

Note 6 - Property and Equipme_2

Note 6 - Property and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Property, Plant and Equipment [Table Text Block]	December 31, 2020 2019 Laboratory and production equipment $ 195,132 $ 144,866 Office, software and computer equipment 47,656 37,241 Furniture and fixtures 3,566 1,617 Leasehold improvements 20,338 8,282 266,692 192,006 Less accumulated depreciation (133,136 ) (112,443 ) $ 133,556 $ 79,563

Note 7 - Intangible Assets, N_2

Note 7 - Intangible Assets, Net (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Finite-Lived Intangible Assets [Table Text Block]	December 31, 2020 December 31, 2019 Gross Accumulated Amortization Net Gross Accumulated Amortization Net Developed technology $ 229,270 $ 151,529 $ 77,741 $ 186,800 $ 123,365 $ 63,435 Customer relationships 70,540 41,136 29,404 70,540 31,409 39,131 Trade name 2,310 2,044 266 2,310 1,766 544 Patents 1,579 1,109 470 1,579 1,010 569 Contract manufacturing rights 98,749 19,207 79,542 — — — Software 78,547 34,337 44,210 74,022 9,411 64,611 $ 480,995 $ 249,362 $ 231,633 $ 335,251 $ 166,961 $ 168,290
Finite-lived Intangible Assets Amortization Expense [Table Text Block]	Year Ended December 31, 2020 2019 2018 Cost of revenue $ 53,782 $ 36,987 $ 32,845 Research and development 27,831 22,305 19,311 Sales and marketing 9,727 9,728 9,727 General and administrative 377 545 609 $ 91,717 $ 69,565 $ 62,492
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	2021 $ 80,442 2022 69,010 2023 41,663 2024 26,394 2025 5,459 Thereafter 8,665 $ 231,633
Finite Lived Intangible Assets Remaining Amortization Period [Table Text Block]	Developed technology 4.3 Customer relationship 3.0 Contract manufacturing rights 4.0 Trade name 1.0 Patents 7.0 Software 1.8

Note 8 - Leases (Tables)

Note 8 - Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Lease, Cost [Table Text Block]	Year Ended December 31, 2020 2019 (in thousands) Operating lease expense $ 8,507 $ 5,094 Cash paid for leases $ 6,868 $ 4,585 Right of use assets obtained in exchange for lease obligations $ 4,161 $ 27,639 December 31, 2020 2019 Weighted average remaining lease term (years) 8.09 8.52 Weighted average discount rate 3.8 % 3.9 %
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	2021 $ 7,045 2022 7,117 2023 7,076 2024 6,751 2025 4,200 Thereafter 19,791 Total future minimum lease payments 51,980 Less: Imputed interest 7,624 Lease incentive recognized as offset to lease liability 1,092 Present value of lease obligations $ 43,264

Note 9 - Convertible Debt (Tabl

Note 9 - Convertible Debt (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Long-term Debt Instruments [Table Text Block]	December 31, December 31, 2020 2019 Principal $ 566,517 $ 517,500 Less: Unamortized debt discount (93,187 ) (38,105 ) Unamortized debt issuance costs (9,637 ) (3,217 ) Net carrying amount of convertible debt 463,693 476,178 Less current portion of convertible debt 58,004 217,467 Convertible debt, non-current portion $ 405,689 $ 258,711
Convertible Debt [Table Text Block]	Year Ended December 31, 2020 2019 2018 Contractual interest expense $ 1,245 $ 2,586 $ 2,587 Amortization of debt discount 5,902 11,645 10,833 Amortization of debt issuance costs 534 1,050 976 Total interest expense $ 7,681 $ 15,281 $ 14,396 Year Ended December 31, 2020 2019 2018 Contractual interest expense $ 1,159 $ 2,152 $ 2,156 Amortization of debt discount 8,344 14,472 13,481 Amortization of debt issuance costs 684 1,186 1,104 Total interest expense $ 10,187 $ 17,810 $ 16,741 Year Ended December 31, 2020 Contractual interest expense $ 2,605 Amortization of debt discount 12,512 Amortization of debt issuance costs 1,301 Total interest expense $ 16,418
Schedule of Extinguishment of Debt [Table Text Block]	Convertible Notes 2015 Convertible Notes 2016 Principal $ 180,454 $ 226,983 Unamortized debt discount (5,596 ) (15,940 ) Unamortized debt issuance costs (504 ) (1,304 ) Total $ 174,354 $ 209,739 Convertible Notes 2015 Convertible Notes 2016 Repurchase consideration allocated to the liability component $ 177,622 $ 220,010 Net carrying value of debt (174,354 ) (209,739 ) Loss on early extinguishment $ 3,268 $ 10,271

Note 10 - Other Liabilities (Ta

Note 10 - Other Liabilities (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Other Current Liabilities [Table Text Block]	December 31, 2020 2019 Software license intangible asset liabilities $ 28,234 $ 25,810 Operating lease liabilities 4,322 2,545 Others 13,374 5,176 $ 45,930 $ 33,531
Other Noncurrent Liabilities [Table Text Block]	December 31, 2020 2019 Income tax payable $ 1,078 $ 692 Deferred tax liabilities 1,311 — Software license intangible asset liabilities 13,885 36,144 Operating lease liabilities 38,942 41,074 Others 3,104 1,007 $ 58,320 $ 78,917

Note 11 - Income Taxes (Tables)

Note 11 - Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]	Year Ended December 31, 2020 2019 2018 United States $ (124,926 ) $ (60,313 ) $ (71,978 ) Foreign 69,636 (12,202 ) (31,984 ) Total $ (55,290 ) $ (72,515 ) $ (103,962 )
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	Year Ended December 31, 2020 2019 2018 Current: U.S. Federal $ — $ — $ — U.S. State 2 (11 ) 42 Foreign 749 70 375 751 59 417 Deferred: U.S. Federal — — (6,734 ) U.S. State — — — Foreign 3,703 337 (1,894 ) 3,703 337 (8,628 ) Total $ 4,454 $ 396 $ (8,211 )
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Year Ended December 31, 2020 2019 2018 Benefit at statutory rate $ (11,611 ) $ (15,228 ) $ (21,832 ) State income taxes (451 ) (587 ) 594 Research and development credits (26,596 ) (16,933 ) (13,283 ) Change in valuation allowance 81,799 31,917 13,757 Impact of foreign operations (10,402 ) (1,045 ) 5,925 Unrecognized tax benefits 2,809 6,725 5,340 Stock-based compensation (42,683 ) (4,731 ) (381 ) Prior year return to provision adjustment (1,190 ) (1,167 ) 1,422 Section 162(m) 5,076 1,046 — Transaction costs 1,498 190 — Convertible debt (2,171 ) — — GILTI 8,484 — — Other (108 ) 209 247 $ 4,454 $ 396 $ (8,211 )
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	December 31, 2020 2019 Deferred tax assets Net operating loss carry forwards $ 116,570 $ 48,481 Research and development credits 106,555 84,268 Stock-based compensation 9,998 8,884 Accrued expenses and allowances 2,910 1,897 Operating lease liability 8,474 7,345 Other temporary differences 14,961 6,884 Foreign tax credit 2,522 2,338 Valuation allowance (207,315 ) (123,989 ) Total deferred tax assets 54,675 36,108 Deferred tax liabilities Acquired intangible assets (33,236 ) (16,092 ) Convertible debt (9,059 ) (6,444 ) Amortization and depreciation (4,787 ) (2,123 ) Right of use asset (5,856 ) (6,806 ) Other deferred tax liabilities (2,205 ) (1,482 ) Total deferred tax liabilities (55,143 ) (32,947 ) Deferred tax assets (liabilities), net $ (468 ) $ 3,161
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	Year Ended December 31, 2020 2019 2018 Balance as of January 1 $ 61,300 $ 53,943 $ 47,606 Increases based on tax positions related to the current year 11,855 7,926 5,747 Increases (decreases) based on tax positions of prior year (10,885 ) (518 ) 708 Gross increase for acquired unrecognized tax benefits 453 — — Statute of limitation expirations (58 ) (51 ) (118 ) Balance as of December 31 $ 62,665 $ 61,300 $ 53,943

Note 12 - Earnings Per Share (T

Note 12 - Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	Year Ended December 31, 2020 2019 2018 Common stock options 665,015 1,032,485 1,208,643 Unvested restricted stock unit 2,827,932 2,772,991 2,871,135 Convertible debt 8,304,801 10,830,038 10,830,038 11,797,748 14,635,514 14,909,816

Note 13 - Stock-based Compens_2

Note 13 - Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Number of Shares Weighted Average Exercise Price Per Share Weighted Average Remaining Contractual Life Aggregate Intrinsic Value Outstanding at December 31, 2019 905,141 $ 13.68 1.81 $ 54,616 Exercised (812,710 ) $ 13.77 Outstanding at December 31, 2020 92,431 $ 12.89 1.08 $ 13,641 Vested and Exercisable as of December 31, 2020 92,431 $ 12.89 1.08 $ 13,641
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]	Weighted Average Grant Date Number of Fair Value Shares Per Share Outstanding at December 31, 2019 3,822,325 $ 41.38 Granted 1,455,465 $ 88.70 Vested (1,886,008 ) $ 44.77 Canceled (95,531 ) $ 56.16 Outstanding at December 31, 2020 3,296,251 $ 59.90 Expected to vest in the future as of December 31, 2020 3,265,609
Schedule of Share-based Payment Award, Equity Instruments Other than Option, Valuation Assumptions [Table Text Block]	Total target shares 312,000 Fair value per share $ 55.81 Total amount to be recognized over the service period $ 17,413 Risk free interest rate 2.29 % Expected volatility 47.52 % Dividend yield — Two-Year Term Three-Year Term Total target shares 53,448 101,775 Fair value per share $ 119.90 $ 125.30 Total amount to be recognized over the service period $ 6,408 $ 12,752 Risk free interest rate 1.41 % 1.38 % Expected volatility 41.37 % 43.79 % Dividend yield — —
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]	Year Ended December 31, 2020 2019 2018 Risk-free interest rate 0.87 % 2.26 % 2.01 % Expected life (in years) 0.49 0.49 0.50 Dividend yield — — — Expected volatility 50 % 43 % 46 % Estimated fair value $ 29.17 $ 13.35 $ 8.35
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]	Year Ended December 31, 2020 2019 2018 Cost of revenue $ 7,859 $ 6,208 $ 2,527 Research and development 62,768 42,265 37,397 Sales and marketing 22,990 15,561 13,470 General and administrative 17,630 12,821 10,490 $ 111,247 $ 76,855 $ 63,884

Note 15 - Fair Value Measurem_2

Note 15 - Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	December 31, 2020 Total Level 1 Level 2 Assets Cash equivalents: Money market funds $ 21,044 $ 20,408 $ 636 Commercial paper 18,297 — 18,297 Investments in marketable securities: Municipal bonds 18,940 — 18,940 Corporate notes/bonds 39,546 — 39,546 Asset-backed securities 2,504 — 2,504 Commercial paper 2,399 — 2,399 $ 102,730 $ 20,408 $ 82,322 December 31, 2019 Total Level 1 Level 2 Assets Cash equivalents: Money market funds $ 190,598 $ 67,494 $ 123,104 Commercial paper 9,465 — 9,465 Municipal bonds 1,250 — 1,250 Investments in marketable securities: U.S. Treasury securities 3,759 3,759 — Municipal bonds 6,119 — 6,119 Corporate notes/bonds 119,449 — 119,449 Asset-backed securities 4,268 — 4,268 Commercial paper 6,464 — 6,464 Certificate of deposit 72 72 — $ 341,444 $ 71,325 $ 270,119

Note 16 - Segment and Geograp_2

Note 16 - Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Revenue from External Customers by Geographic Areas [Table Text Block]	Year Ended December 31, 2020 2019 2018 (in thousands) China $ 365,170 $ 164,715 $ 113,684 United States 162,978 103,402 87,545 Thailand 70,771 54,468 40,884 Other 84,035 43,050 52,377 $ 682,954 $ 365,635 $ 294,490

Note 17 - Commitments and Con_2

Note 17 - Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block]	December 31, 2020 2021 $ 391 2022 119 2023 47 2024 46 2025 37 $ 640

Note 20 - Supplementary Finan_2

Note 20 - Supplementary Financial Information (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Quarterly Financial Information [Table Text Block]	Year Ended December 31, 2020(1)(3) Mar. 31, 2020 Jun. 30, 2020(2)(4) Sept. 30, 2020 Dec. 31, 2020 (in thousands, except per share amounts) Revenue $ 139,430 $ 175,292 $ 180,691 $ 187,541 Gross profit 73,697 92,932 101,540 102,962 Net loss (20,286 ) (24,051 ) (3,380 ) (12,027 ) Basic earnings per share (0.44 ) (0.49 ) (0.07 ) (0.23 ) Diluted earnings per share (0.44 ) (0.49 ) (0.07 ) (0.23 ) Year Ended December 31, 2019 Mar. 31, 2019 Jun. 30, 2019 Sept. 30, 2019 Dec. 31, 2019 (in thousands, except per share amounts) Revenue $ 82,223 $ 86,285 $ 94,231 $ 102,896 Gross profit 47,631 49,109 54,482 61,599 Net loss (22,745 ) (20,578 ) (16,180 ) (13,408 ) Basic earnings per share (0.51 ) (0.46 ) (0.36 ) (0.29 ) Diluted earnings per share (0.51 ) (0.46 ) (0.36 ) (0.29 )

Note 1 - Organization and Sum_3

Note 1 - Organization and Summary of Significant Accounting Policies 1 (Details Textual) - USD ($) $ in Thousands	May 18, 2020	Jan. 10, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Foreign Currency Transaction Gain (Loss), before Tax, Total			$ (427)	$ (453)	$ (135)
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Total			521
Goodwill, Impairment Loss			0	0	$ 0
Accounts Receivable, Allowance for Credit Loss, Ending Balance			$ 226	$ 1,152
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			21.00%	21.00%	21.00%
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability, Total			$ 0		$ 0
Number of Reportable Segments			1
Licenses for Intellectual Property [Member]
Percent of Revenue From Nonproduct Sales			7.00%	7.00%	3.00%
Accounting Standards Update 2014-09 [Member]
Contract with Customer, Refund Liability, Total			$ 417	$ 656
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)			1 year
Product Warranty Term (Year)			1 year
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)			10 years
Product Warranty Term (Year)			2 years
eSilicon [Member]
Payments to Acquire Businesses, Gross		$ 214,644
Arrive [Member]
Payments to Acquire Businesses, Gross	$ 20,141

Note 1 - Organization and Sum_4

Note 1 - Organization and Summary of Significant Accounting Policies 2 (Details Textual) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 $ in Millions	Dec. 31, 2020USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)	1 year
Revenue, Remaining Performance Obligation, Amount	$ 10.5

Note 1 - Organization and Sum_5

Note 1 - Organization and Summary of Significant Accounting Policies - Useful Lives by Asset Category (Details)	12 Months Ended
	Dec. 31, 2020
Office Equipment [Member]
Estimated useful life (Year)	3 years
Software and Software Development Costs [Member]
Estimated useful life (Year)	3 years
Leasehold Improvements [Member]
Estimated useful life	Shorter of lease term or estimated useful life
Equipment [Member] | Minimum [Member]
Estimated useful life (Year)	2 years
Equipment [Member] | Maximum [Member]
Estimated useful life (Year)	5 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 ($)	May 18, 2020	Jan. 10, 2020	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020
eSilicon [Member]
Payments to Acquire Businesses, Gross		$ 214,644,000
Purchase Consideration in Escrow		10,000,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual				$ 144,986,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual				$ 251,000
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value					$ 14,999,000
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (Loss), Net, Total					4,999,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		$ 148,720
eSilicon [Member] | General and Administrative Expense [Member]
Business Combination, Acquisition Related Costs					535,000	$ 1,015,000	$ 1,550,000
eSilicon [Member] | Contractual Rights [Member]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year)		5 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		$ 105,160,000
eSilicon [Member] | Developed Technology Rights [Member]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year)		8 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		$ 33,630,000
Arrive [Member]
Payments to Acquire Businesses, Gross	$ 20,141,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			$ 5,614,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual			$ (491,000)
Holdback Payments to Acquire Business	3,000,000
Arrive [Member] | General and Administrative Expense [Member]
Business Combination, Acquisition Related Costs					$ 180,000
Arrive [Member] | Developed Technology Rights [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 8,840,000
Finite-Lived Intangible Asset, Useful Life (Year)	5 years

Note 2 - Acquisitions - Purchas

Note 2 - Acquisitions - Purchase Price Allocation (Details) - USD ($)	Dec. 31, 2020	May 18, 2020	Jan. 10, 2020	Dec. 31, 2019
Goodwill	$ 181,688,000			$ 104,502,000
eSilicon [Member]
Cash			$ 704,000
Restricted cash			2,100,000
Accounts receivable			5,750,000
Inventories			21,086,000
Prepaid expenses and other current assets			21,012,000
Property and equipment			7,106,000
Intangible assets			148,720,000
Right of use asset			1,022,000
Other noncurrent assets			252,000
Accounts payable			(9,105,000)
Accrued expenses			(25,060,000)
Deferred revenue			(7,501,000)
Other current liabilities			(13,886,000)
Other liabilities			(3,567,000)
Total identifiable net assets			148,633,000
Goodwill			66,011,000
Net assets acquired			214,644,000
Developed technology			148,720
eSilicon [Member] | Developed Technology Rights [Member]
Developed technology			$ 33,630,000
Arrive [Member]
Inventories		$ 126,000
Total identifiable net assets		8,966,000
Goodwill		11,175,000
Net assets acquired		20,141,000
Arrive [Member] | Developed Technology Rights [Member]
Developed technology		$ 8,840,000

Note 2 - Acquisitions - Intangi

Note 2 - Acquisitions - Intangible Assets Acquired (Details) - eSilicon [Member]	Jan. 10, 2020USD ($)
Estimated Fair Value	$ 148,720
Contractual Rights [Member]
Estimated Fair Value	$ 105,160,000
Estimated Useful Life (Year)	5 years
Developed Technology Rights [Member]
Estimated Fair Value	$ 33,630,000
Estimated Useful Life (Year)	8 years
Computer Software, Intangible Asset [Member]
Estimated Fair Value	$ 9,930,000
Computer Software, Intangible Asset [Member] | Minimum [Member]
Estimated Useful Life (Year)	6 months
Computer Software, Intangible Asset [Member] | Maximum [Member]
Estimated Useful Life (Year)	2 years

Note 2 - Acquisitions - Pro For

Note 2 - Acquisitions - Pro Forma Information (Details) - ESilicon and Arrive [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue	$ 691,066	$ 470,626
Net loss	$ (54,500)	$ (134,568)

Note 3 - Investments (Details T

Note 3 - Investments (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Proceeds from Sale and Maturity of Other Investments, Total	$ 14,999	$ 3,424	$ 2,414
Gain on Sale of Investments	0	924	0
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount	0	0	7,000
Other Noncurrent Assets [Member] | Equity Securities, Fair Value Based on Observable Transaction [Member]
Equity Securities without Readily Determinable Fair Value, Amount	23,593	25,792
Equity Securities without Readily Determinable Fair Value, Amount Remeasured to Fair Value	11,093	8,792
Other Income [Member]
Gain on Sale of Investments		924
Other Income [Member] | Equity Securities, Fair Value Based on Observable Transaction [Member]
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount	1,801	1,926	$ 3,066
TAIWAN, PROVINCE OF CHINA
Equity Securities, FV-NI	1,871	1,662
Equity Securities, FV-NI, Unrealized Loss	$ 123	$ 332

Note 3 - Investments - Summary

Note 3 - Investments - Summary of Investments by Investment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Available-for-sale securities, amortized cost	$ 62,881	$ 139,448
Available-for-sale securities, gross unrealized gain	508	685
Available-for-sale securities, gross unrealized loss	0	(2)
Available-for-sale securities, fair value	63,389	140,131
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale securities, amortized cost	18,844	6,062
Available-for-sale securities, gross unrealized gain	96	57
Available-for-sale securities, gross unrealized loss	0	0
Available-for-sale securities, fair value	18,940	6,119
US Treasury Securities [Member]
Available-for-sale securities, amortized cost		3,752
Available-for-sale securities, gross unrealized gain		7
Available-for-sale securities, gross unrealized loss		0
Available-for-sale securities, fair value		3,759
Corporate Debt Securities [Member]
Available-for-sale securities, amortized cost	39,138	118,859
Available-for-sale securities, gross unrealized gain	408	591
Available-for-sale securities, gross unrealized loss	0	(1)
Available-for-sale securities, fair value	39,546	119,449
Asset-backed Securities [Member]
Available-for-sale securities, amortized cost	2,500	4,239
Available-for-sale securities, gross unrealized gain	4	29
Available-for-sale securities, gross unrealized loss	0	0
Available-for-sale securities, fair value	2,504	4,268
Commercial Paper [Member]
Available-for-sale securities, amortized cost	2,399	6,464
Available-for-sale securities, gross unrealized gain	0	1
Available-for-sale securities, gross unrealized loss	0	(1)
Available-for-sale securities, fair value	$ 2,399	6,464
Certificates of Deposit [Member]
Available-for-sale securities, amortized cost		72
Available-for-sale securities, gross unrealized gain		0
Available-for-sale securities, gross unrealized loss		0
Available-for-sale securities, fair value		$ 72

Note 3 - Investments - Contract

Note 3 - Investments - Contractual Maturities of Available-for-sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Due in one year or less, cost	$ 53,585
Due in one year or less, fair value	53,902
Due between one and five years, cost	9,296
Due between one and five years, fair value	9,487
Available-for-sale securities, cost	62,881	$ 139,448
Available-for-sale securities, fair value	$ 63,389	$ 140,131

Note 4 - Concentrations (Detail

Note 4 - Concentrations (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable, Allowance for Credit Loss, Ending Balance	$ 226	$ 1,152
Allowance for Distributors' Price Adjustment	$ 417	$ 656
Customer Concentration Risk [Member] | Revenue from Contract with Customer Benchmark [Member] | Customer A and F [Member]
Concentration Risk, Percentage	12.00%	14.00%	18.00%
Customer Concentration Risk [Member] | Revenue from Contract with Customer Benchmark [Member] | Customer B and G [Member]
Concentration Risk, Percentage		11.00%	14.00%
Customer Concentration Risk [Member] | Revenue from Contract with Customer Benchmark [Member] | Customer H [Member]
Concentration Risk, Percentage			11.00%

Note 4 - Concentrations - Conce

Note 4 - Concentrations - Concentration Risk, by Risk Factor (Details) - Customer Concentration Risk [Member]	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable [Member] | Customer A [Member]
Concentration risk, percentage	11.00%	15.00%
Accounts Receivable [Member] | Customer B [Member]
Concentration risk, percentage		13.00%
Accounts Receivable [Member] | Customer C [Member]
Concentration risk, percentage	12.00%
Accounts Receivable [Member] | Customer D [Member]
Concentration risk, percentage	18.00%	19.00%
Accounts Receivable [Member] | Customer E [Member]
Concentration risk, percentage	11.00%
Revenue from Contract with Customer Benchmark [Member] | Customer A [Member]
Concentration risk, percentage	12.00%	14.00%	18.00%
Revenue from Contract with Customer Benchmark [Member] | Customer C [Member]
Concentration risk, percentage		11.00%
Revenue from Contract with Customer Benchmark [Member] | Customer D [Member]
Concentration risk, percentage	14.00%
Revenue from Contract with Customer Benchmark [Member] | Customer E [Member]
Concentration risk, percentage	15.00%		11.00%

Note 5 - Inventories - Schedule

Note 5 - Inventories - Schedule of Inventory (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Raw materials	$ 50,626	$ 18,593
Work in process	33,946	19,081
Finished goods	26,831	17,339
Inventory, Net, Total	$ 111,403	$ 55,013

Note 6 - Property and Equipme_3

Note 6 - Property and Equipment, Net (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Depreciation, Total	$ 28,019	$ 22,399	$ 20,227
Capitalized Computer Software, Gross	8,367	7,339
Capitalized Computer Software, Amortization	1,017	384	$ 591
Capital Expenditures Incurred but Not yet Paid	$ 4,295	$ 4,728

Note 6 - Property and Equipme_4

Note 6 - Property and Equipment, Net - Property and Equipment Components (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property and equipment, gross	$ 266,692	$ 192,006
Less accumulated depreciation	(133,136)	(112,443)
Property, Plant and Equipment, Net, Ending Balance	133,556	79,563
Equipment [Member]
Property and equipment, gross	195,132	144,866
Office, Software, and Computer Equipment [Member]
Property and equipment, gross	47,656	37,241
Furniture and Fixtures [Member]
Property and equipment, gross	3,566	1,617
Leasehold Improvements [Member]
Property and equipment, gross	$ 20,338	$ 8,282

Note 7 - Intangible Assets, N_3

Note 7 - Intangible Assets, Net (Details Textual) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Current Period Reclassification Adjustment	$ 60.5

Note 7 - Intangible Assets, N_4

Note 7 - Intangible Assets, Net - Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Intangible assets, gross	$ 480,995	$ 335,251
Intangible assets, accumulated amortization	249,362	166,961
Intangible assets, net	231,633	168,290
Developed Technology Rights [Member]
Intangible assets, gross	229,270	186,800
Intangible assets, accumulated amortization	151,529	123,365
Intangible assets, net	77,741	63,435
Customer Relationships [Member]
Intangible assets, gross	70,540	70,540
Intangible assets, accumulated amortization	41,136	31,409
Intangible assets, net	29,404	39,131
Trade Names [Member]
Intangible assets, gross	2,310	2,310
Intangible assets, accumulated amortization	2,044	1,766
Intangible assets, net	266	544
Patents [Member]
Intangible assets, gross	1,579	1,579
Intangible assets, accumulated amortization	1,109	1,010
Intangible assets, net	470	569
Contractual Rights [Member]
Intangible assets, gross	98,749	0
Intangible assets, accumulated amortization	19,207	0
Intangible assets, net	79,542	0
Computer Software, Intangible Asset [Member]
Intangible assets, gross	78,547	74,022
Intangible assets, accumulated amortization	34,337	9,411
Intangible assets, net	$ 44,210	$ 64,611

Note 7 - Intangible Assets, N_5

Note 7 - Intangible Assets, Net - Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amortization of intangible assets	$ 91,717	$ 69,565	$ 62,492
Cost of Sales [Member]
Amortization of intangible assets	53,782	36,987	32,845
Research and Development Expense [Member]
Amortization of intangible assets	27,831	22,305	19,311
Selling and Marketing Expense [Member]
Amortization of intangible assets	9,727	9,728	9,727
General and Administrative Expense [Member]
Amortization of intangible assets	$ 377	$ 545	$ 609

Note 7 - Intangible Assets, N_6

Note 7 - Intangible Assets, Net - Expected Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
2021	$ 80,442
2022	69,010
2023	41,663
2024	26,394
2025	5,459
Thereafter	8,665
Finite-Lived Intangible Assets, Net, Ending Balance	$ 231,633	$ 168,290

Note 7 - Intangible Assets, N_7

Note 7 - Intangible Assets, Net - Weighted-average Amortization Periods Remaining (Details)	12 Months Ended
	Dec. 31, 2020
Developed Technology Rights [Member]
Finite-lived intangible assets, remaining amortization period (Year)	4 years 3 months 18 days
Customer Relationships [Member]
Finite-lived intangible assets, remaining amortization period (Year)	3 years
Contractual Rights [Member]
Finite-lived intangible assets, remaining amortization period (Year)	4 years
Trade Names [Member]
Finite-lived intangible assets, remaining amortization period (Year)	1 year
Patents [Member]
Finite-lived intangible assets, remaining amortization period (Year)	7 years
Computer Software, Intangible Asset [Member]
Finite-lived intangible assets, remaining amortization period (Year)	1 year 9 months 18 days

Note 8 - Leases (Details Textua

Note 8 - Leases (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2020
Lessee, Operating Lease, Renewal Term (Year)		5 years
Operating Lease, Expense	$ 5,742
Minimum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)		1 year
Maximum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)		10 years

Note 8 - Leases - Lease Cost (D

Note 8 - Leases - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating lease expense	$ 8,507	$ 5,094
Cash paid for leases	6,868	4,585
Right of use assets obtained in exchange for lease obligations	$ 4,161	$ 27,639
Weighted average remaining lease term (years) (Year)	8 years 1 month 2 days	8 years 6 months 7 days
Weighted average discount rate	3.80%	3.90%

Note 8 - Leases - Future Minimu

Note 8 - Leases - Future Minimum Lease Payments Under Non-cancelable Operating Leases (Details) $ in Thousands	Dec. 31, 2020USD ($)
2021	$ 7,045
2022	7,117
2023	7,076
2024	6,751
2025	4,200
Thereafter	19,791
Total future minimum lease payments	51,980
Less: Imputed interest	7,624
Lease incentive recognized as offset to lease liability	1,092
Liabilities [Member]
Present value of lease obligations	$ 43,264

Note 9 - Convertible Debt (Deta

Note 9 - Convertible Debt (Details Textual) $ / shares in Units, $ in Thousands	Dec. 01, 2020USD ($)shares	Apr. 30, 2020USD ($)$ / shares$ / item	Feb. 25, 2021USD ($)shares	Dec. 31, 2020USD ($)shares	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2016USD ($)$ / shares$ / item	Dec. 31, 2015USD ($)$ / shares$ / item	Sep. 30, 2016USD ($)
Proceeds from Convertible Debt				$ 493,350	$ 0	$ 0
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt				100,616
Payments for Call Options				55,660	0	0
Repayments of Convertible Debt				461,236	$ 0	$ 0
Convertible Notes 2015 [Member]
Extinguishment of Debt, Amount				180,454
Convertible Notes 2016 [Member]
Extinguishment of Debt, Amount				226,983
Convertible Notes 2015 and Convertible Notes 2016 [Member]
Repayments of Convertible Debt				$ 411,677
Convertible Debt Repurchases, Shares Outstanding Impact (in shares) | shares				4,977,756
Convertible Debt [Member] | Convertible Notes 2015 [Member]
Debt Instrument, Face Amount								$ 230,000
Debt Instrument, Interest Rate, Stated Percentage								1.125%
Debt Instrument, Convertible, Conversion Ratio								24.8988
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares								$ 40.16
Capped Call, Aggregate Call Options Purchased, Percentage Related to Shares Underlying the Convertible Note								100.00%
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger								98.00%
Proceeds from Convertible Debt								$ 230,000
Convertible Debt, Total								175,974
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt								54,026
Debt Issuance Costs, Gross								6,359
Unamortized Debt Issuance Expense								4,864
Debt Instrument, Convertible Equity Component Issuance Cost								$ 1,495
Convertible Debt in Default, Percent Holders to Declare Due and Payable								100.00%
Derivative, Cap Price (in USD per Per Share) | $ / item								52.06
Payments for Call Options								$ 17,802
Repayments of Convertible Debt	$ 49,559
Stock Issued During Period, Shares, Maturity of Convertible Securities (in shares) | shares	851,448
Stock Repurchased and Retired During Period, Shares, Maturity of Capped Call Option (in shares) | shares	522,718
Extinguishment of Debt, Amount				$ 180,454
Adjustments to Additional Paid in Capital Equity Component of Convertible Debt Retired				(299,458)
Common Stock Issued in Relation to Repurchases of Convertible Debt, Value				295,660
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
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 (in dollars per share) | $ / shares							$ 56.34
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger							98.00%
Proceeds from Convertible Debt							$ 287,500
Convertible Debt, Total							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
Convertible Debt in Default, Percent Holders to Declare Due and Payable							100.00%
Derivative, Cap Price (in USD per Per Share) | $ / item							73.03
Payments for Call Options							$ 22,540
Debt Instrument, Repurchase Price, Percentage of Principal Amount Repurchased							100.00%
Convertible Debt Holders in Default, Percent of Principal Amount							25.00%
Convertible Debt in Bankruptcy, Insolvency, and Reorganization, Percent due and Payable							100.00%
Debt and Equity Issuance Costs, Net							$ 7,689
Extinguishment of Debt, Amount				226,983
Adjustments to Additional Paid in Capital Equity Component of Convertible Debt Retired				(273,975)
Common Stock Issued in Relation to Repurchases of Convertible Debt, Value				263,730
Convertible Debt, Conversion Request Received, Aggregate Principal Amount				$ 12,668
Convertible Debt [Member] | Convertible Notes 2016 [Member] | Subsequent Event [Member]
Repayments of Convertible Debt			$ 10,950
Stock Issued During Period, Shares, Maturity of Convertible Securities (in shares) | shares			187,680
Convertible Debt, Conversion Request Received, Aggregate Principal Amount			$ 9,312
Debt Instrument, Repurchased Face Amount			$ 14,575
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
Convertible Debt [Member] | Convertible Notes 2020 [Member]
Debt Instrument, Face Amount		$ 506,000
Debt Instrument, Interest Rate, Stated Percentage		0.75%
Debt Instrument, Convertible, Conversion Ratio		8.0059
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares		$ 124.91
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%
Proceeds from Convertible Debt		$ 506,000
Debt Issuance Costs, Gross		$ 13,507
Convertible Debt in Default, Percent Holders to Declare Due and Payable		100.00%
Derivative, Cap Price (in USD per Per Share) | $ / item		188.54
Payments for Call Options		$ 55,660
Convertible Debt Holders in Default, Percent of Principal Amount		25.00%
Convertible Debt in Bankruptcy, Insolvency, and Reorganization, Percent due and Payable		100.00%
Proceeds from Convertible Debt, Portion Allocated to Long-term Debt		$ 402,624
Proceeds from Convertible Debt, Allocated to Stockholders' Equity		103,376
Convertible Debt Issuance Costs, Gross, Long-term Debt Component		10,747
Convertible Debt Issuance Costs, Gross, Equity Component		$ 2,760
Capped Call Options, Percentage of Common Shares Underlying the Convertible Debt		100.00%
Convertible Debt [Member] | Convertible Notes 2020 [Member] | Conversion Circumstance 1 [Member]
Debt Instrument, Convertible, Threshold Trading Days		20
Debt Instrument, Convertible, Threshold Consecutive Trading Days		30

Note 9 - Convertible Debt - Car

Note 9 - Convertible Debt - Carry Amount of Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Principal	$ 566,517	$ 517,500
Unamortized debt discount	(93,187)	(38,105)
Unamortized debt issuance costs	(9,637)	(3,217)
Net carrying amount of convertible debt	463,693	476,178
Less current portion of convertible debt	58,004	217,467
Convertible debt, non-current portion	$ 405,689	$ 258,711

Note 9 - Convertible Debt - Sch

Note 9 - Convertible Debt - Schedule of Interest Expense for Convertible Debt (Details) - Convertible Debt [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Convertible Notes 2015 [Member]
Contractual interest expense	$ 1,245	$ 2,586	$ 2,587
Amortization of debt discount	5,902	11,645	10,833
Amortization of debt issuance costs	534	1,050	976
Total interest expense	7,681	15,281	14,396
Convertible Notes 2016 [Member]
Contractual interest expense	1,159	2,152	2,156
Amortization of debt discount	8,344	14,472	13,481
Amortization of debt issuance costs	684	1,186	1,104
Total interest expense	10,187	$ 17,810	$ 16,741
Convertible Notes 2020 [Member]
Contractual interest expense	2,605
Amortization of debt discount	12,512
Amortization of debt issuance costs	1,301
Total interest expense	$ 16,418

Note 9 - Convertible Debt - Ret

Note 9 - Convertible Debt - Retired Long-term Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Loss on early extinguishment	$ 13,539	$ 0	$ 0
Convertible Notes 2015 [Member] | Convertible Debt [Member]
Principal	180,454
Unamortized debt discount	(5,596)
Unamortized debt issuance costs	(504)
Total	174,354
Repurchase consideration allocated to the liability component	177,622
Net carrying value of debt	(174,354)
Loss on early extinguishment	3,268
Convertible Notes 2016 [Member] | Convertible Debt [Member]
Principal	226,983
Unamortized debt discount	(15,940)
Unamortized debt issuance costs	(1,304)
Total	209,739
Repurchase consideration allocated to the liability component	220,010
Net carrying value of debt	(209,739)
Loss on early extinguishment	$ 10,271

Note 10 - Other Liabilities - O

Note 10 - Other Liabilities - Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Software license intangible asset liabilities	$ 28,234	$ 25,810
Others	13,374	5,176
Other Liabilities, Current, Total	45,930	33,531
Other Current Liabilities [Member]
Operating lease liabilities	$ 4,322	$ 2,545

Note 10 - Other Liabilities -_2

Note 10 - Other Liabilities - Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income tax payable	$ 1,078	$ 692
Deferred tax liabilities	1,311	0
Software license intangible asset liabilities	13,885	36,144
Others	3,104	1,007
Other Liabilities, Noncurrent, Total	58,320	78,917
Other Noncurrent Liabilities [Member]
Operating lease liabilities	$ 38,942	$ 41,074

Note 11 - Income Taxes (Details

Note 11 - Income Taxes (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation, at Highest Federal Statutory Income Tax Rate, Percent				35.00%
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability, Total	$ 0		$ 0
GILTI Inclusion Cost	40,399
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 83,326	$ 31,674	$ 13,777
Earnings Per Share, Tax Holiday Effect (in dollars per share)	$ (0.24)	$ (0.04)	$ (0.05)
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 4,600
Decrease in Unrecognized Tax Benefits is Reasonably Possible	44
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total	15	$ 16	$ 17
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	43	56	65
Undistributed Earnings of Foreign Subsidiaries	110,205
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total	589,232
Operating Loss Carryforwards, Not Subject to Expiration	306,708
Domestic Tax Authority [Member] | Cortina Systems Inc. [Member]
Operating Loss Carryforwards, Total	49,152
Domestic Tax Authority [Member] | ClariPhy Communications Inc.[Member]
Operating Loss Carryforwards, Total	46,601
Domestic Tax Authority [Member] | eSilicon [Member]
Operating Loss Carryforwards, Total	156,101
Domestic Tax Authority [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	72,000
Domestic Tax Authority [Member] | Research Tax Credit Carryforward [Member] | Cortina Systems Inc. [Member]
Tax Credit Carryforward, Amount	6,033
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	138,341
State and Local Jurisdiction [Member] | Cortina Systems Inc. [Member]
Operating Loss Carryforwards, Total	3,919
State and Local Jurisdiction [Member] | ClariPhy Communications Inc.[Member]
Operating Loss Carryforwards, Total	68,104
State and Local Jurisdiction [Member] | eSilicon [Member]
Operating Loss Carryforwards, Total	26,200
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	72,314
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member] | Cortina Systems Inc. [Member]
Tax Credit Carryforward, Amount	7,912
Foreign Tax Authority [Member]
Increase (Decrease) in Income Taxes	(11,946)	$ (1,729)	$ (2,093)
Foreign Tax Authority [Member] | Tax Authority, Taiwan [Member]
Operating Loss Carryforwards, Subject to Expiration	1,655
Foreign Tax Authority [Member] | Her Majesty's Revenue and Customs (HMRC) [Member]
Operating Loss Carryforwards, Not Subject to Expiration	9,666
Foreign Tax Authority [Member] | Canada Revenue Agency [Member]
Tax Credit Carryforward, Amount	7,694
Foreign Tax Authority [Member] | Canada Revenue Agency [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	$ 4,319
Foreign Tax Authority [Member] | Inland Revenue, Singapore (IRAS) [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	17.00%	17.00%	17.00%
Effective Income Tax Rate Reconciliation, Tax Holiday, Percent	5.50%
Open Tax Year	2010 2011 2012 2013 2014 2015
Foreign Tax Authority [Member] | Vietnam Tax Department [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	20.00%
Effective Income Tax Rate Reconciliation, Deduction, Percent, Total	0.00%
Decrease to Additional Paid-in Capital [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ (7,524)
Increase to Other Comprehensive Income [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	38		$ 20
Increase to Goodwill [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	9,013
Increase to Income Tax Provision [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 81,799	$ 31,917	$ 13,757
Decrease to Other Comprehensive Income [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		$ (243)

Note 11 - Income Taxes - Income

Note 11 - Income Taxes - Income Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
United States	$ (124,926)	$ (60,313)	$ (71,978)
Foreign	69,636	(12,202)	(31,984)
Loss before income taxes	$ (55,290)	$ (72,515)	$ (103,962)

Note 11 - Income Taxes - Compon

Note 11 - Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
U.S. Federal	$ 0	$ 0	$ 0
U.S. State	2	(11)	42
Foreign	749	70	375
Total current income tax expense	751	59	417
Deferred:
U.S. Federal	0	0	(6,734)
U.S. State	0	0	0
Foreign	3,703	337	(1,894)
Total deferred income tax expense	3,703	337	(8,628)
Total	$ 4,454	$ 396	$ (8,211)

Note 11 - Income Taxes - Effect

Note 11 - Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Benefit at statutory rate	$ (11,611)	$ (15,228)	$ (21,832)
State income taxes	(451)	(587)	594
Research and development credits	(26,596)	(16,933)	(13,283)
Change in valuation allowance	81,799	31,917	13,757
Impact of foreign operations	(10,402)	(1,045)	5,925
Unrecognized tax benefits	2,809	6,725	5,340
Stock-based compensation	(42,683)	(4,731)	(381)
Prior year return to provision adjustment	(1,190)	(1,167)	1,422
Section 162(m)	5,076	1,046	0
Transaction costs	1,498	190	0
Convertible debt	(2,171)	0	0
GILTI	8,484	0	0
Other	(108)	209	247
Total	$ 4,454	$ 396	$ (8,211)

Note 11 - Income Taxes - Comp_2

Note 11 - Income Taxes - Components of Company's Net Deferred Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Net operating loss carry forwards	$ 116,570	$ 48,481
Research and development credits	106,555	84,268
Stock-based compensation	9,998	8,884
Accrued expenses and allowances	2,910	1,897
Operating lease liability	8,474	7,345
Other temporary differences	14,961	6,884
Foreign tax credit	2,522	2,338
Valuation allowance	(207,315)	(123,989)
Total deferred tax assets	54,675	36,108
Acquired intangible assets	(33,236)	(16,092)
Convertible debt	(9,059)	(6,444)
Amortization and depreciation	(4,787)	(2,123)
Right of use asset	(5,856)	(6,806)
Other deferred tax liabilities	(2,205)	(1,482)
Total deferred tax liabilities	(55,143)	(32,947)
Deferred tax liabilities, net	$ (468)
Deferred tax assets, net		$ 3,161

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, 2020	Dec. 31, 2019	Dec. 31, 2018
Balance	$ 61,300	$ 53,943	$ 47,606
Increases based on tax positions related to the current year	11,855	7,926	5,747
Decreases based on tax positions of prior year	(10,885)	(518)
Increases based on tax positions of prior year			708
Gross increase for acquired unrecognized tax benefits	453	0	0
Statute of limitation expirations	(58)	(51)	(118)
Balance	$ 62,665	$ 61,300	$ 53,943

Note 12 - Earnings Per Share -

Note 12 - Earnings Per Share - Securities Not Included in Computation of Earnings Per Share (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Anti-dilutive securities (in shares)	11,797,748	14,635,514	14,909,816
Share-based Payment Arrangement, Option [Member]
Anti-dilutive securities (in shares)	665,015	1,032,485	1,208,643
Restricted Stock Units (RSUs) [Member]
Anti-dilutive securities (in shares)	2,827,932	2,772,991	2,871,135
Convertible Debt Securities [Member]
Anti-dilutive securities (in shares)	8,304,801	10,830,038	10,830,038

Note 13 - Stock-based Compens_3

Note 13 - Stock-based Compensation (Details Textual) - USD ($) $ in Thousands	1 Months Ended				12 Months Ended
	Dec. 31, 2020	Feb. 28, 2020	Jan. 31, 2018	Dec. 31, 2011	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Common Stock, Capital Shares Reserved for Future Issuance (in shares)	5,619,804				5,619,804
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)					0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value					$ 96,417	$ 12,008	$ 4,553
Proceeds from Stock Options Exercised					$ 11,190	$ 2,616	$ 719
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)					128,892	208,721	283,493
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 161,581				$ 161,581
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)					2 years 6 months 18 days
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 (in shares)					2,750,000
Common Stock [Member]
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)					128,892	208,721	283,493
Executive Officer [Member] | Common Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)	114,300
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)					4 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)	3,296,251				3,296,251	3,822,325
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)					1,455,465
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)					4 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)	34,224				34,224
Market Value Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)		346,201	702,000
Market Value Stock Units, Performance Period (Year)					3 years
Market Value Stock Units [Member] | Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number (in shares)	50,800
Market Value Stock Units [Member] | Minimum [Member]
Percentage of Target Number of Shares		0.00%	0.00%
Market Value Stock Units, Performance Period (Year)		2 years
Market Value Stock Units [Member] | Maximum [Member]
Percentage of Target Number of Shares		225.00%	225.00%
Market Value Stock Units, Performance Period (Year)		3 years

Note 13 - Stock-based Compens_4

Note 13 - Stock-based Compensation - Options Outstanding (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Number of shares outstanding (in shares)	905,141
Number of shares outstanding, weighted-average exercise price (in dollars per share)	$ 13.68
Number of shares outstanding, weighted-average remaining contractual life (Year)	1 year 29 days	1 year 9 months 21 days
Number of shares outstanding, aggregate intrinsic value	$ 13,641	$ 54,616
Number of shares exercised (in shares)	(812,710)
Number of shares exercised, weighted-average exercise price (in dollars per share)	$ 13.77
Number of shares outstanding (in shares)	92,431	905,141
Number of shares outstanding, weighted-average exercise price (in dollars per share)	$ 12.89	$ 13.68
Vested and expected to vest in the future (in shares)	92,431
Number of shares vested and expected to vest in the future, weighted-average exercise price (in dollars per share)	$ 12.89
Number of shares vested and expected to vest in the future, weighted-average remaining contractual life (Year)	1 year 29 days
Number of shares vested and expected to vest in the future, aggregate intrinsic value	$ 13,641

Note 13 - Stock-based Compens_5

Note 13 - Stock-based Compensation - Outstanding Restricted Stock Units (Details) - Restricted Stock Units (RSUs) [Member]	12 Months Ended
	Dec. 31, 2020$ / sharesshares
Outstanding (in shares)	3,822,325
Outstanding, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 41.38
Granted (in shares)	1,455,465
Granted, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 88.70
Vested (in shares)	(1,886,008)
Vested, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 44.77
Canceled (in shares)	(95,531)
Canceled, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 56.16
Outstanding (in shares)	3,296,251
Outstanding, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 59.90
Expected to vest in the future as of December 31, 2020 (in shares)	3,265,609

Note 13 - Stock-based Compens_6

Note 13 - Stock-based Compensation - Assumptions Valuation for Market Value Stock Units (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)$ / sharesshares
Market Value Stock Units [Member]
Total target shares (in shares) | shares	312,000
Fair value per share (in dollars per share) | $ / shares	$ 55.81
Total amount to be recognized over the service period | $	$ 17,413
Risk free interest rate	2.29%
Expected volatility	47.52%
Dividend yield	0.00%
Two Year Term Market Value Stock Units [Member]
Total target shares (in shares) | shares	53,448
Fair value per share (in dollars per share) | $ / shares	$ 119.90
Total amount to be recognized over the service period | $	$ 6,408
Risk free interest rate	1.41%
Expected volatility	41.37%
Dividend yield	0.00%
Three Year Term Market Value Stock Units [Member]
Total target shares (in shares) | shares	101,775
Fair value per share (in dollars per share) | $ / shares	$ 125.30
Total amount to be recognized over the service period | $	$ 12,752
Risk free interest rate	1.38%
Expected volatility	43.79%
Dividend yield	0.00%

Note 13 - Stock-based Compens_7

Note 13 - Stock-based Compensation - Fair Value of Employee Stock Purchase Plan (Details) - Employee Stock Purchase Plan [Member] - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Risk-free interest rate	0.87%	2.26%	2.01%
Expected life (Year)	5 months 26 days	5 months 26 days	6 months
Dividend yield	0.00%	0.00%	0.00%
Expected volatility	50.00%	43.00%	46.00%
Estimated fair value (in dollars per share)	$ 29.17	$ 13.35	$ 8.35

Note 13 - Stock-based Compens_8

Note 13 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stock-based compensation expense	$ 111,247	$ 76,855	$ 63,884
Cost of Sales [Member]
Stock-based compensation expense	7,859	6,208	2,527
Research and Development Expense [Member]
Stock-based compensation expense	62,768	42,265	37,397
Selling and Marketing Expense [Member]
Stock-based compensation expense	22,990	15,561	13,470
General and Administrative Expense [Member]
Stock-based compensation expense	$ 17,630	$ 12,821	$ 10,490

Note 14 - Employee Benefit Pl_2

Note 14 - Employee Benefit Plan (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 2,932	$ 1,976	$ 1,800

Note 15 - Fair Value Measurem_3

Note 15 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Convertible Debt, Fair Value Disclosures	$ 890,181	$ 845,296

Note 15 - Fair Value Measurem_4

Note 15 - Fair Value Measurements - Assets and Liabilities Carried at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Total fair value of assets	$ 102,730	$ 341,444
Fair Value, Inputs, Level 1 [Member]
Total fair value of assets	20,408	71,325
Fair Value, Inputs, Level 2 [Member]
Total fair value of assets	82,322	270,119
Money Market Funds [Member]
Cash equivalents	21,044	190,598
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Cash equivalents	20,408	67,494
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Cash equivalents	636	123,104
Commercial Paper [Member]
Cash equivalents	18,297	9,465
Investment in marketable securities	2,399	6,464
Commercial Paper [Member] | Fair Value, Inputs, Level 1 [Member]
Cash equivalents	0	0
Investment in marketable securities	0	0
Commercial Paper [Member] | Fair Value, Inputs, Level 2 [Member]
Cash equivalents	18,297	9,465
Investment in marketable securities	2,399	6,464
Municipal Bonds [Member]
Cash equivalents		1,250
Investment in marketable securities	18,940	6,119
Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Cash equivalents		0
Investment in marketable securities	0	0
Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Cash equivalents		1,250
Investment in marketable securities	18,940	6,119
Corporate Debt Securities [Member]
Investment in marketable securities	39,546	119,449
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Investment in marketable securities	0	0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Investment in marketable securities	39,546	119,449
US Treasury Securities [Member]
Investment in marketable securities		3,759
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Investment in marketable securities		3,759
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Investment in marketable securities		0
Asset-backed Securities [Member]
Investment in marketable securities	2,504	4,268
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Investment in marketable securities	0	0
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Investment in marketable securities	$ 2,504	4,268
Certificates of Deposit [Member]
Investment in marketable securities		72
Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member]
Investment in marketable securities		72
Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]
Investment in marketable securities		$ 0

Note 16 - Segment and Geograp_3

Note 16 - Segment and Geographic Information (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Number of Operating Segments	1
Non-US [Member]
Long-Lived Assets	$ 72,364	$ 33,826
TAIWAN, PROVINCE OF CHINA
Long-Lived Assets	$ 59,931	$ 27,750

Note 16 - Segment and Geograp_4

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

3 Months Ended

12 Months Ended

Dec. 31, 2020

[1],[2]

Sep. 30, 2020

[1],[2]

Jun. 30, 2020

[1],[2],[3],[4]

Mar. 31, 2020

[1],[2]

Dec. 31, 2019

[1],[2]

Sep. 30, 2019

[1],[2]

Jun. 30, 2019

[1],[2],[3],[4]

Mar. 31, 2019

[1],[2]

Dec. 31, 2020

Dec. 31, 2019

Dec. 31, 2018

Revenue

$ 187,541

$ 180,691

$ 175,292

$ 139,430

$ 102,896

$ 94,231

$ 86,285

$ 82,223

$ 682,954

$ 365,635

$ 294,490

CHINA

Revenue

365,170

164,715

113,684

UNITED STATES

Revenue

162,978

103,402

87,545

THAILAND

Revenue

70,771

54,468

40,884

Other Country [Member]

Revenue

$ 84,035

$ 43,050

$ 52,377

[1]

In 2020, the Company repurchased $180,454 and $226,983 aggregate principal amount of the Convertible Notes 2015 and Convertible Notes 2016, respectively, paying a total of $411,677 cash (excluding payment for accrued interest) and issued 4,977,756 million shares of common stock. The repurchase was accounted for as a debt extinguishment which resulted in loss from early extinguishment of debt of $13,539.

[2]

On January 10, 2020 and May 18, 2020, the Company completed the acquisition of eSilicon for $214,644 and Arrive for $20,141. The revenue and expenses of eSilicon and Arrive are included in consolidated statement of income (loss) from the date of the acquisition.

[3]

In April 2020, the Company issued $506,000 of 0.75% convertible senior notes due April 15, 2025.

[4]

The income tax expense included a reversal of certain unrecognized tax benefit as a result of the Internal Revenue Service exam conclusion with a no change report. The reversal of the unrecognized tax benefit had no impact on the Company's income tax provision as a result of the full federal valuation allowance. In addition, the income tax expense included an accrual for unrecognized tax benefit for foreign taxes and an income tax benefit for the remeasurement of certain net foreign deferred tax liability based on the renewed tax holiday period in Singapore.

Note 17 - Commitments and Con_3

Note 17 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Value of Open Purchase Orders	$ 40,642
Indemnification Agreement [Member]
Loss Contingency Accrual, Ending Balance	0	$ 0
Mask [Member]
Purchase Obligation, Total	$ 337

Note 17 - Commitments and Con_4

Note 17 - Commitments and Contingencies - Future Minimum Payments Under Non-cancelable Service Agreements (Details) $ in Thousands	Dec. 31, 2020USD ($)
2021	$ 391
2022	119
2023	47
2024	46
2025	37
Unrecorded Unconditional Purchase Obligation, Total	$ 640

Note 18 - Pending Merger with_2

Note 18 - Pending Merger with Marvell Technology (Details Textual) $ / shares in Units, $ in Millions	Oct. 29, 2020USD ($)$ / sharesshares
Merger Agreement, Ownership Percentage of Combined Company	17.00%
Merger Agreement, Conversion of Common Stock into Parent Company Stock (in shares) | shares	2.323
Merger Agreement, Cash Paid Per Share of Common Stock (in dollars per share) | $ / shares	$ 66
Marvell Technology Group Ltd [Member]
Merger Agreement, Termination Fee	$ 300
Marvell Technology Group Ltd [Member]
Merger Agreement, Ownership Percentage of Combined Company	83.00%
Merger Agreement, Conversion of Common Stock into Parent Company Stock (in shares) | shares	1
Merger Agreement, Termination Fee	$ 400
Merger Agreement, Termination Fee Due to Failure to Receive Regulatory Approval	460
Merger Agreement, Maximum Termination Fee if Not Approved by Shareholders	$ 25

Note 19 - Subsequent Event (Det

Note 19 - Subsequent Event (Details Textual) - Restricted Stock Units (RSUs) [Member] - shares	1 Months Ended	12 Months Ended
	Feb. 25, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)		1,455,465
Share-based Payment Arrangement, Employee [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	673,525

Note 20 - Supplementary Finan_3

Note 20 - Supplementary Financial Information (Unaudited) (Details Textual) - USD ($) $ in Thousands	May 18, 2020	Jan. 10, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Apr. 30, 2020
Repayments of Convertible Debt			$ 461,236	$ 0	$ 0
Extinguishment of Debt, Gain (Loss), Net of Tax, Total			(13,539)
Convertible Notes 2015 [Member]
Extinguishment of Debt, Amount			180,454
Convertible Notes 2016 [Member]
Extinguishment of Debt, Amount			226,983
Convertible Notes 2020 [Member] | Convertible Debt [Member]
Debt Instrument, Face Amount						$ 506,000
Debt Instrument, Interest Rate, Stated Percentage						0.75%
Convertible Notes 2015 and Convertible Notes 2016 [Member]
Repayments of Convertible Debt			$ 411,677
Convertible Debt Repurchases, Shares Outstanding Impact (in shares)			4,977,756
eSilicon [Member]
Payments to Acquire Businesses, Gross		$ 214,644
Arrive [Member]
Payments to Acquire Businesses, Gross	$ 20,141

Note 20 - Supplementary Finan_4

Note 20 - Supplementary Financial Information (Unaudited) - Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2020	[1],[2]	Sep. 30, 2020	[1],[2]	Jun. 30, 2020	[1],[2],[3],[4]	Mar. 31, 2020	[1],[2]	Dec. 31, 2019	[1],[2]	Sep. 30, 2019	[1],[2]	Jun. 30, 2019	[1],[2],[3],[4]	Mar. 31, 2019	[1],[2]	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue	$ 187,541		$ 180,691		$ 175,292		$ 139,430		$ 102,896		$ 94,231		$ 86,285		$ 82,223		$ 682,954	$ 365,635	$ 294,490
Gross profit	102,962		101,540		92,932		73,697		61,599		54,482		49,109		47,631		371,131	212,821	165,145
Net loss	$ (12,027)		$ (3,380)		$ (24,051)		$ (20,286)		$ (13,408)		$ (16,180)		$ (20,578)		$ (22,745)		$ (59,744)	$ (72,911)	$ (95,751)
Basic earnings per share (in dollars per share)	$ (0.23)		$ (0.07)		$ (0.49)		$ (0.44)		$ (0.29)		$ (0.36)		$ (0.46)		$ (0.51)		$ (1.20)	$ (1.61)	$ (2.19)
Diluted earnings per share (in dollars per share)	$ (0.23)		$ (0.07)		$ (0.49)		$ (0.44)		$ (0.29)		$ (0.36)		$ (0.46)		$ (0.51)		$ (1.20)	$ (1.61)	$ (2.19)
[1]	In 2020, the Company repurchased $180,454 and $226,983 aggregate principal amount of the Convertible Notes 2015 and Convertible Notes 2016, respectively, paying a total of $411,677 cash (excluding payment for accrued interest) and issued 4,977,756 million shares of common stock. The repurchase was accounted for as a debt extinguishment which resulted in loss from early extinguishment of debt of $13,539.
[2]	On January 10, 2020 and May 18, 2020, the Company completed the acquisition of eSilicon for $214,644 and Arrive for $20,141. The revenue and expenses of eSilicon and Arrive are included in consolidated statement of income (loss) from the date of the acquisition.
[3]	In April 2020, the Company issued $506,000 of 0.75% convertible senior notes due April 15, 2025.
[4]	The income tax expense included a reversal of certain unrecognized tax benefit as a result of the Internal Revenue Service exam conclusion with a no change report. The reversal of the unrecognized tax benefit had no impact on the Company's income tax provision as a result of the full federal valuation allowance. In addition, the income tax expense included an accrual for unrecognized tax benefit for foreign taxes and an income tax benefit for the remeasurement of certain net foreign deferred tax liability based on the renewed tax holiday period in Singapore.