Entity Central Index Key Document and entity information. Document And Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Accrued and other liabilities current. Statement Of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Marketable debt securities Available For Sale Securities Debt Securities Current Accounts receivable, net Accounts Receivable Net Current Inventories Inventory Net Restricted cash Restricted Cash Current Prepaid expenses and other current assets Prepaid Expense And Other Assets Current Total current assets Assets Current Property and equipment, net Property Plant And Equipment Net Deferred tax assets, non-current Deferred Tax Assets Net Noncurrent Intangible assets, net Intangible Assets Net Excluding Goodwill Operating lease right-of-use assets, net Operating Lease Right Of Use Asset Goodwill Goodwill Other non-current assets Other Assets Noncurrent Total assets Assets LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities And Stockholders Equity [Abstract] Current liabilities: Liabilities Current [Abstract] Accounts payable Accounts Payable Current Accrued and other current liabilities Accrued And Other Liabilities Current Operating lease liabilities, current Operating Lease Liability Current Income taxes payable Accrued Income Taxes Current Deferred revenue, current Contract With Customer Liability Current Total current liabilities Liabilities Current Operating lease liabilities, non-current Operating Lease Liability Noncurrent Other long-term liabilities Other Liabilities Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 13) Commitments And Contingencies Shareholders' equity: Stockholders Equity [Abstract] Preference shares, $0.00045 par value per share, 20,000,000 shares authorized and no shares issued and outstanding at April 30, 2019 and January 31, 2019, respectively Preferred Stock Value Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized at April 30, 2019 and January 31, 2019, respectively; 32,738,600 shares issued and outstanding at April 30, 2019; 32,303,540 shares issued and outstanding at January 31, 2019 Common Stock Value Additional paid-in capital Additional Paid In Capital Accumulated other comprehensive income Accumulated Other Comprehensive Income Loss Net Of Tax Retained earnings Retained Earnings Accumulated Deficit Total shareholders’ equity Stockholders Equity Total liabilities and shareholders' equity Liabilities And Stockholders Equity Preference shares, par value Preferred Stock Par Or Stated Value Per Share Preference shares, shares authorized Preferred Stock Shares Authorized Preference shares, shares issued Preferred Stock Shares Issued Preference shares, shares outstanding Preferred Stock Shares Outstanding Ordinary shares, par value Common Stock Par Or Stated Value Per Share Ordinary shares, shares authorized Common Stock Shares Authorized Ordinary shares, shares issued Common Stock Shares Issued Ordinary shares, shares outstanding Common Stock Shares Outstanding Income Statement [Abstract] Revenue Revenue From Contract With Customer Excluding Assessed Tax Cost of revenue Cost Of Goods And Services Sold Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Research and development Research And Development Expense Selling, general and administrative Selling General And Administrative Expense Total operating expenses Operating Expenses Loss from operations Operating Income Loss Other income, net Nonoperating Income Expense Loss before income taxes Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Provision for income taxes Income Tax Expense Benefit Net loss Net Income Loss Net loss per share attributable to ordinary shareholders: Earnings Per Share [Abstract] Basic Earnings Per Share Basic Diluted Earnings Per Share Diluted Weighted-average shares used to compute net loss per share attributable to ordinary shareholders: Weighted Average Number Of Shares Outstanding [Abstract] Basic Weighted Average Number Of Shares Outstanding Basic Diluted Weighted Average Number Of Diluted Shares Outstanding Statement Of Income And Comprehensive Income [Abstract] Net loss Other comprehensive income (loss), net of tax: Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] Unrealized gains (losses) on investments Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax Other comprehensive income (loss), net of tax Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Comprehensive loss Comprehensive Income Net Of Tax Shares issued during the period as a result of restricted stock units vested. Value of shares issued during the period as a result of restricted stock units vested. Statement Of Stockholders Equity [Abstract] Statement [Table] Statement [Table] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Outstanding Ordinary Shares [Member] Common Stock [Member] Additional Paid-in Capital [Member] Additional Paid In Capital [Member] Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Income [Member] Retained Earnings [Member] Retained Earnings [Member] Statement [Line Items] Statement [Line Items] Beginning Balance, Amount Beginning Balance, Shares Cumulative effect of change in accounting principle New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification Exercise of stock options, Amount Stock Issued During Period Value Stock Options Exercised Exercise of stock options, Shares Stock Issued During Period Shares Stock Options Exercised Vesting of restricted stock units, Amount Stock Issued During Period Value Restricted Stock Units Vesting of restricted stock units, Shares Stock Issued During Period Shares Restricted Stock Units Employee stock purchase plan, Amount Stock Issued During Period Value Employee Stock Purchase Plan Employee stock purchase plan, Shares Stock Issued During Period Shares Employee Stock Purchase Plans Stock repurchase, Amount Stock Repurchased During Period Value Stock repurchase, Shares Stock Repurchased During Period Shares Stock-based compensation expense related to stock awards granted to employees and consultants Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Net unrealized gains (losses) on investments - net of taxes Ending Balance, Amount Ending Balance, Shares Amount of increase (decrease) in lease liabilities. Amount of cash inflow from exercise of stock options and employee stock purchase plan withholding. Capital expenditures incurred but not yet paid and financing incurred for tangible and intangible asset purchased. Statement Of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided By Used In Operating Activities [Abstract] Net loss Profit Loss Adjustments to reconcile net loss to net cash provided by operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Depreciation and amortization Depreciation And Amortization Amortization/accretion of marketable securities Accretion Amortization Of Discounts And Premiums Investments Stock-based compensation Share Based Compensation Other non-cash items, net Other Noncash Income Expense Changes in operating assets and liabilities: Increase Decrease In Operating Capital [Abstract] Accounts receivable Increase Decrease In Accounts Receivable Inventories Increase Decrease In Inventories Prepaid expenses and other current assets Increase Decrease In Prepaid Deferred Expense And Other Assets Deferred tax assets Increase Decrease In Deferred Income Taxes Other assets Increase Decrease In Other Operating Assets Accounts payable Increase Decrease In Accounts Payable Accrued liabilities Increase Decrease In Accrued Liabilities Income taxes payable Increase Decrease In Accrued Income Taxes Payable Deferred revenue Increase Decrease In Contract With Customer Liability Lease Liabilities Increase Decrease In Lease Liabilities Other long-term liabilities Increase Decrease In Other Noncurrent Liabilities Net cash provided by operating activities Net Cash Provided By Used In Operating Activities Cash flows from investing activities: Net Cash Provided By Used In Investing Activities [Abstract] Purchase of investments Payments To Acquire Investments Sales of investments Proceeds From Sale Of Available For Sale Securities Debt Maturities of investments Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities Purchase of property and equipment Payments To Acquire Property Plant And Equipment Net cash provided by investing activities Net Cash Provided By Used In Investing Activities Cash flows from financing activities: Net Cash Provided By Used In Financing Activities [Abstract] Stock repurchase Payments For Repurchase Of Common Stock Proceeds from exercise of stock options and employee stock purchase plan Proceeds From Issuance Of Shares Under Incentive Equity Plan And Employee Stock Purchase Plan Payment for intangible asset Payments To Acquire Intangible Assets Net cash provided by (used in) financing activities Net Cash Provided By Used In Financing Activities Net increase (decrease) in cash, cash equivalents and restricted cash Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect Cash, cash equivalents and restricted cash at beginning of period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations Cash, cash equivalents and restricted cash at end of period Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid for income taxes Income Taxes Paid Supplemental disclosure of noncash investing and financing activities: Noncash Investing And Financing Items [Abstract] Unpaid liabilities related to intangible and fixed assets additions Capital Expenditures Incurred But Not Yet Paid And Financing Incurred For Tangible And Intangible Asset Purchased Accounting Policies [Abstract] Organization and Summary of Significant Accounting Policies Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Text Block] Investments All Other Investments [Abstract] Financial Instruments and Fair Value Financial Instruments Disclosure [Text Block] Inventory Disclosure [Abstract] Inventories Inventory Disclosure [Text Block] Property Plant And Equipment [Abstract] Property and Equipment, Net Property Plant And Equipment Disclosure [Text Block] Goodwill And Intangible Assets Disclosure [Abstract] Intangible Assets Intangible Assets Disclosure [Text Block] Payables And Accruals [Abstract] Accrued and Other Current Liabilities Accounts Payable Accrued Liabilities And Other Liabilities Disclosure Current [Text Block] Leases [Abstract] Leases Lessee Operating Leases [Text Block] Other Liabilities Disclosure [Abstract] Other Long-Term Liabilities Accounts Payable Accrued Liabilities And Other Liabilities Disclosure Noncurrent [Text Block] The entire disclosure of an entity's capital stock, shares repurchased, and shares reserved for future issuance. Equity [Abstract] Capital Stock Capital Stock [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Stock-based Compensation Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Net Loss Per Ordinary Share Earnings Per Share [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Segment Reporting [Abstract] Segment Reporting Segment Reporting Disclosure [Text Block] Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Formation and business of the entity. Organization Organization Policy [Text Block] Basis of Presentation Basis Of Accounting Policy Policy [Text Block] Basis of Consolidation Consolidation Policy [Text Block] Use of Estimates Use Of Estimates Disclosure of accounting policy for concentration risks existing in the entity's suppliers, revenue and financial instruments. Concentration of Risk Concentration Of Risk Policy [Text Block] Disclosure of accounting policy for determining cash equivalents and marketable debt securities. The disclosure may also address accounting policies for investments classified as trading, available for sale, or held to maturity and may include how the entity determines whether impairments of available for sale or held to maturity investments are other than temporary, how the fair values of the entity's securities are determined, and how the entity presents the realized and unrealized gains or losses in its financial statements. Cash Equivalents and Marketable Debt Securities Cash Equivalents And Marketable Debt Securities Policy [Text Block] Restricted Cash Cash And Cash Equivalents Restricted Cash And Cash Equivalents Policy Inventories Inventory Policy [Text Block] Disclosure of accounting policy for noncancelable internal-use software license and associated liabilities. Noncancelable Internal-Use Software License Noncancelable Internal Use Software License Policy [Text Block] Leases Lessee Leases Policy [Text Block] Revenue Recognition Revenue From Contract With Customer Policy [Text Block] Cost of revenue policy. Cost of Revenue Cost Of Revenue Policy [Text Block] Income Taxes Income Tax Policy [Text Block] Net Income (Loss) Per Ordinary Share Earnings Per Share Policy [Text Block] Comprehensive Income (Loss) Comprehensive Income Policy Policy [Text Block] Recent Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Schedule of cash and cash equivalents and restricted cash. Schedule of Cash, Cash Equivalents and Restricted Cash Schedule Of Cash And Cash Equivalents And Restricted Cash Table [Text Block] Schedule of Available-for-Sale Securities at Fair Value Available For Sale Securities [Text Block] Schedule of Cash Equivalents and Marketable Debt Securities Schedule Of Cash Cash Equivalents And Short Term Investments Table [Text Block] Summary of Contractual Maturities of Investments Investments Classified By Contractual Maturity Date Table [Text Block] Schedule of Fair Value of Financial Instruments Measured on Recurring Basis Fair Value Assets Measured On Recurring Basis [Text Block] Schedule of Inventory Schedule Of Inventory Current Table [Text Block] Schedule of Property and Equipment Property Plant And Equipment [Text Block] Summary of Carrying Amounts of Intangible Assets Schedule Of Finite Lived Intangible Assets Table [Text Block] Summary of Estimated Future Amortization Expense of Software Licenses Scheduleof Finite Lived Intangible Assets Future Amortization Expense Table [Text Block] Schedule of Accrued and Other Current Liabilities Schedule Of Accounts Payable And Accrued Liabilities Table [Text Block] Adjustments for New Accounting Pronouncements Adjustments For New Accounting Pronouncements [Axis] Type of Adoption Type Of Adoption [Member] Leases (Topic 842) [Member] Accounting Standards Update201602 [Member] Schedule of Cumulative Effect of the Changes to the Condensed Consolidated Balance Sheet Schedule Of New Accounting Pronouncements And Changes In Accounting Principles [Text Block] Summary of supplemental cash flow information related to leases. Schedule of Supplemental Cash Flow Information Related to Leases Summary Of Supplemental Cash Flow Information Related To Leases Table [Text Block] Schedule of Future Minimum Lease Payments for Operating Lease Liabilities Lessee Operating Lease Liability Maturity Table [Text Block] Schedule of Future Minimum Undiscounted Lease Payments Schedule Of Future Minimum Rental Payments For Operating Leases Table [Text Block] Schedule of Other Long-Term Liabilities Other Noncurrent Liabilities Table [Text Block] Summary of ordinary shares reserved for future issuance. Schedule of Ordinary Shares Reserved for Future Issuance under EIP and ESPP Summary Of Ordinary Shares Reserved For Future Issuance Table [Text Block] Classification of Stock-based Compensation Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Text Block] Weighted-Average Assumptions Used to Estimate Fair Value Schedule Of Share Based Payment Award Stock Options Valuation Assumptions Table [Text Block] Stock Option Activities Schedule Of Share Based Compensation Stock Options Activity Table [Text Block] Restricted Stock and Restricted Stock Units Activities Schedule Of Sharebased Compensation Restricted Stock And Restricted Stock Units Activity Table [Text Block] Computation of Basic and Diluted Loss Per Ordinary Share Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Weighted-Average Potentially Dilutive Securities Excluded from Computation of Diluted Loss Per Ordinary Share Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Text Block] Schedule of income tax expense and effective tax rate. Summary of Income Taxes Schedule Of Income Tax Expenses And Effective Tax Rate Table [Text Block] Company's Revenue by Geographic Region Based on Bill-to Location Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Text Block] Cash And Cash Equivalents [Abstract] Total as presented in the consolidated statements of cash flows Organization Consolidation And Presentation Of Financial Statements [Abstract] Summary of significant accounting policies. Summary of significant accounting policies. Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] ASU 2016-02 [Member] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Right-of-use assets Lease liabilities Operating Lease Liability Investments Debt And Equity Securities [Abstract] Debt Securities Available For Sale [Table] Debt Securities Available For Sale [Table] Investment Type Investment Type [Axis] Investments Investment Type Categorization [Member] Money market funds [Member] Money Market Funds [Member] Certificates of Deposit [Member] Certificates Of Deposit [Member] Commercial paper [Member] Commercial Paper [Member] Corporate bonds [Member] Bonds [Member] Asset-backed securities [Member] Asset Backed Securities [Member] U.S. government securities [Member] U S Treasury Securities [Member] Schedule of Available-for-sale Securities [Line Items] Schedule Of Available For Sale Securities [Line Items] Amortized Cost Available For Sale Debt Securities Amortized Cost Basis Unrealized Gains Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax Unrealized Losses Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax Fair Value Available For Sale Securities Debt Securities Debt Security Category Information By Category Of Debt Security [Axis] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments Other Than Temporary Impairment Credit Losses Recognized In Earnings Categories Of Investments [Domain] Included in marketable debt securities [Member] Availableforsale Securities [Member] Asset Class Fair Value By Asset Class [Axis] Asset Class Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain] Included in cash equivalents [Member] Cash Equivalents [Member] Total cash equivalents and marketable debt securities Fair value of available-for-sale debt securities maturing within one year following the latest balance sheet. Fair value of available-for-sale debt securities maturing within one to three years following the latest balance sheet. Available For Sale Securities Debt Maturities Fair Value [Abstract] Due within one year Available For Sale Securities Debt Maturities Within One Year Due within one to three years Available For Sale Securities Debt Maturities Within One To Three Years Fair Value Total cash equivalents and marketable debt securities Fair Value Disclosures [Abstract] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Level 2 [Member] Fair Value By Fair Value Hierarchy Level [Axis] Fair Value Hierarchy and NAV Fair Value Measurements Fair Value Hierarchy [Domain] Level 1 [Member] Fair Value Inputs Level1 [Member] Level 2 [Member] Fair Value Inputs Level2 [Member] Level 3 [Member] Fair Value Inputs Level3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Work-in-progress Inventory Work In Process Net Of Reserves Finished goods Inventory Finished Goods Net Of Reserves Total Depreciation of property and equipment Depreciation Schedule Of Property Plant And Equipment [Table] Schedule Of Property Plant And Equipment [Table] Property, Plant and Equipment, Type Property Plant And Equipment By Type [Axis] Property, Plant and Equipment, Type Property Plant And Equipment Type [Domain] Computer equipment and software [Member] Computer Equipment [Member] Machinery and equipment [Member] Machinery And Equipment [Member] Furniture and fixtures [Member] Furniture And Fixtures [Member] Leasehold improvements [Member] Leasehold Improvements [Member] Construction in progress [Member] Construction In Progress [Member] Property Plant And Equipment [Line Items] Property Plant And Equipment [Line Items] Property and equipment, gross Property Plant And Equipment Gross Less: accumulated depreciation and amortization Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Total property and equipment, net Schedule Of Finite Lived Intangible Assets [Table] Schedule Of Finite Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class Finite Lived Intangible Assets By Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name Finite Lived Intangible Assets Major Class Name [Domain] IPR&D [Member] In Process Research And Development [Member] Internal-use software license. Internal-use software licenses [Member] Internal Use Software License [Member] Business Acquisition Business Acquisition [Axis] Business Acquisition, Acquiree Business Acquisition Acquiree [Domain] VisLab S.r.l. Vis Lab SRL [Member] Vis Lab S R L [Member] Finite Lived Intangible Assets [Line Items] Finite Lived Intangible Assets [Line Items] Intangible assets acquired Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Assets Other Than Goodwill Intangible assets, net of amortization expense Finite Lived Intangible Assets Net Accumulated amortization of intangible asset Finite Lived Intangible Assets Accumulated Amortization Current portion of liabilities associated with noncancelable internal-use software license recorded at net present value. Non-current portion of liabilities associated with noncancelable internal-use software license recorded at net present value. Liabilities associated with noncancelable internal-use software license at net present value, current Liabilities Associated With Noncancelable Internal Use Software License At Net Present Value Current Liabilities associated with noncancelable internal-use software license at net present value, non-current Liabilities Associated With Noncancelable Internal Use Software License At Net Present Value Noncurrent In-process research and development [Member] Gross Carrying Amount Finite Lived Intangible Assets Gross Accumulated Amortization Net Carrying Amount Amortization expense Amortization Of Intangible Assets 2020 (9 months remaining) Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year 2021 Finite Lived Intangible Assets Amortization Expense Year Two 2022 Finite Lived Intangible Assets Amortization Expense Year Three 2023 Finite Lived Intangible Assets Amortization Expense Year Four 2024 Finite Lived Intangible Assets Amortization Expense Year Five Thereafter Finite Lived Intangible Assets Amortization Expense After Year Five Impairment of intangible assets Impairment Of Intangible Assets Excluding Goodwill Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated rebates granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated research and development cost. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued employee compensation Employee Related Liabilities Current Accrued rebates Accrued Rebates Accrued product development costs Accrued Development Cost Liabilities Software license liabilities, current Other accrued liabilities Other Accrued Liabilities Current Total accrued and other current liabilities Operating lease expiration year. Lease, year of expiration Operating Lease Expiration Year Operating leases, existence of options to extend Lessee Operating Lease Existence Of Option To Extend Operating leases, options to extend description Lessee Operating Lease Option To Extend Operating leases, extended term Lessee Operating Lease Renewal Term Operating lease expense Operating Lease Expense Leases disclosure. Leases disclosure. Leases Disclosure [Table] Leases Disclosure [Table] Restatement Restatement [Axis] Restatement Restatement [Domain] Restatement Adjustment [Member] Restatement Adjustment [Member] Leases Disclosure [Line Items] Leases Disclosure [Line Items] Operating lease right-of-use assets Cash paid for operating leases included in operating cash flows Operating Lease Payments Supplemental non-cash information related to lease liabilities arising from obtaining right-of-use assets Right Of Use Asset Obtained In Exchange For Operating Lease Liability Weighted-average remaining lease term – operating leases Operating Lease Weighted Average Remaining Lease Term1 Weighted-average discount rate – operating leases Operating Lease Weighted Average Discount Rate Percent 2020 (9 months remaining) Lessee Operating Lease Liability Payments Remainder Of Fiscal Year 2021 Lessee Operating Lease Liability Payments Due Year Two 2022 Lessee Operating Lease Liability Payments Due Year Three 2023 Lessee Operating Lease Liability Payments Due Year Four 2024 Lessee Operating Lease Liability Payments Due Year Five Thereafter Lessee Operating Lease Liability Payments Due After Year Five Total future annual minimum lease payments Lessee Operating Lease Liability Payments Due Less: interest Lessee Operating Lease Liability Undiscounted Excess Amount Total lease liabilities 2020 Operating Leases Future Minimum Payments Due Current 2021 Operating Leases Future Minimum Payments Due In Two Years 2022 Operating Leases Future Minimum Payments Due In Three Years 2023 Operating Leases Future Minimum Payments Due In Four Years 2024 Operating Leases Future Minimum Payments Due In Five Years Thereafter Operating Leases Future Minimum Payments Due Thereafter Total future annual minimum lease payments Operating Leases Future Minimum Payments Due Unrecognized tax benefits, including interest, recorded in the balance sheet. Unrecognized tax benefits, including interest Unrecognized Tax Benefits Including Interest Deferred tax liabilities, non-current Deferred Tax Liabilities Gross Noncurrent Software license liabilities, non-current Other long-term liabilities Other Sundry Liabilities Noncurrent Total other long-term liabilities Schedule Of Stock By Class [Table] Schedule Of Stock By Class [Table] Plan Name Plan Name [Axis] Plan Name Plan Name [Domain] 2012 Equity Incentive Plan. 2012 Equity Incentive Plan [Member] Two Thousand Twelve Equity Incentive Plan [Member] Scenario Statement Scenario [Axis] Scenario, Unspecified Scenario Unspecified [Domain] Scenario, plan automatically increased by the lessor of [Member] Scenario Plan [Member] Amended and restated 2012 employee stock purchase plan. Amended and Restated 2012 Employee Stock Purchase Plan [Member] Amended And Restated Two Thousand Twelve Employee Stock Purchase Plan [Member] Range Range [Axis] Range Range [Member] Maximum [Member] Maximum [Member] Minimum [Member] Minimum [Member] Stock repurchase program additional authorization. Stock Repurchase Program $100.0 Million Authorization [Member] Stock Repurchase Program Additional Authorization [Member] Class Of Stock [Line Items] Class Of Stock [Line Items] Annual increase in ordinary shares for available for future issuance. Annual increase in shares for available for future issuance by percentage of outstanding ordinary shares as of last day of immediately preceding fiscal year. Additional ordinary shares reserved for issuance Share Based Compensation Arrangement By Share Based Payment Award Number Of Additional Shares Authorized Annual increase in ordinary shares for available for future issuance Annual Increase In Ordinary Shares For Available For Future Issuance Annual shares increase for future issuance by percentage under 2012 equity incentive plan Annual Increase In Shares For Available For Future Issuance By Percentage Of Outstanding Ordinary Shares As Of Last Day Of Immediately Preceding Fiscal Year Number of additional shares authorized for issuance under an established purchase plan. Annual increase in shares for available for future issuance by percentage of the outstanding ordinary shares on the first day of such fiscal year. Additional ordinary shares reserved for issuance Additional Common Stock Capital Shares Reserved For Future Issuance Annual shares increase for future issuance by percentage under 2012 employee stock purchase plan Annual Increase In Shares For Available For Future Issuance By Percentage Of Outstanding Ordinary Shares On First Day Of Such Fiscal Year Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Equity Incentive Plan. EIP [Member] Equity Incentive Plan [Member] Employee Stock Purchase Plan. ESPP [Member] Employee Stock Purchase Plan [Member] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Shares reserved Common Stock Capital Shares Reserved For Future Issuance Stock repurchase program authorization date. Stock repurchase program commencement date. Amount authorized under stock repurchase program Stock Repurchase Program Authorized Amount1 Stock repurchase program, authorization date Stock Repurchase Program Authorization Date Stock repurchase program, period Stock Repurchase Program Period In Force1 Stock repurchase program, commencing date Stock Repurchase Program Commencement Date Stock repurchased during period, shares Stock repurchased during period, cash Stock based compensation. Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Cost of revenue [Member] Cost Of Sales [Member] Research and development [Member] Research And Development Expense [Member] Selling, general and administrative [Member] Selling General And Administrative Expenses [Member] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Stock-based compensation: Stock Based Compensation [Abstract] Total stock-based compensation Allocated Share Based Compensation Expense Award Type Award Type [Axis] Equity Award Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Stock options [Member] Employee Stock Option [Member] Restricted stock units [Member] Restricted Stock Units R S U [Member] Restricted Stock Awards [Member] Restricted Stock [Member] Balance Sheet Location Balance Sheet Location [Axis] Balance Sheet Location Balance Sheet Location [Domain] Accrued and other current liabilities. Accrued and other current liabilities [Member] Accrued And Other Current Liabilities [Member] Restricted stock and restricted stock units. Restricted Stock and Restricted Stock Units [Member] Restricted Stock And Restricted Stock Units [Member] Total unrecognized compensation cost, stock options Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options Total unrecognized compensation cost, restricted stock units Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options Weighted average recognition period Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 Total unrecognized compensation cost, restricted stock awards Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Sale of Stock Subsidiary Sale Of Stock [Axis] Sale of Stock Sale Of Stock Name Of Transaction [Domain] Employee stock purchase plan awards [Member] Employee Stock [Member] Volatility Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Risk-free interest rate Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Expected term (years) Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 Dividend yield Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate Shares, Outstanding Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number Shares, Granted Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross Shares, Exercised Shares, Forfeited Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period Shares, Expired Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period Shares, Outstanding Shares, Exercisable Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number Weighted-Average Exercise Price, Outstanding Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Weighted-Average Exercise Price, Granted Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price Weighted-Average Exercise Price, Exercised Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price Weighted-Average Exercise Price, Forfeited Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price Weighted-Average Exercise Price, Expired Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price Weighted-Average Exercise Price, Outstanding Weighted-Average Exercise Price, Exercisable Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price Weighted-Average Grant-date Fair Value, Granted Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value Total Intrinsic Value Of Options Exercised Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value Weighted-Average Remaining Contractual Term, Outstanding Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 Weighted-Average Remaining Contractual Term, Exercisable Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 Aggregate Intrinsic Value, Outstanding Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value Aggregate Intrinsic Value, Exercisable Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 Closing market price of ordinary shares on NASDAQ on the last day of reporting period. Closing price of ordinary shares Closing Market Price Of Ordinary Shares On N A S D A Q On Last Day Of Reporting Period Restricted stock and restricted stock units [Member] Shares, Unvested, beginning balance Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number Shares, Granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Shares, Vested Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Shares, Forfeited Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period Shares, Unvested, ending balance Weighted-Average Grant-Date Fair Value, Unvested, beginning balance Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value Weighted-Average Grant-Date Fair Value, Granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value Weighted-Average Grant-Date Fair Value, Vested Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value Weighted-Average Grant-Date Fair Value, Forfeited Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value Weighted-Average Grant-Date Fair Value, Unvested, ending balance Aggregate intrinsic value of unvested restricted stock and restricted stock units Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Aggregate Intrinsic Value Nonvested Numerator: Net Income Loss [Abstract] Denominator: Weighted-average ordinary shares - basic Weighted-average ordinary shares - diluted Net loss per ordinary share: Earnings Per Share Basic And Diluted [Abstract] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Employee stock purchase plan awards [Member] Antidilutive Securities Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis] Antidilutive Securities, Name Antidilutive Securities Name [Domain] Options to purchase ordinary shares [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive shares excluded from computation of earnings per share Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Loss before income taxes Provision for income taxes Effective tax rate Effective Income Tax Rate Continuing Operations Income taxes. Income taxes. Income Taxes [Table] Income Taxes [Table] Income Tax Authority Income Tax Authority [Axis] Income Tax Authority Income Tax Authority [Domain] U.S. federal tax authorities [Member] Domestic Country [Member] U.S. state tax authorities [Member] State And Local Jurisdiction [Member] Foreign tax authorities [Member] Foreign Country [Member] Tax Period Tax Period [Axis] Tax Period Tax Period [Domain] Earliest tax year [Member] Earliest Tax Year [Member] Latest tax year [Member] Latest Tax Year [Member] Income Taxes [Line Items] Income Taxes [Line Items] Tax year that remains open to examination under enacted tax laws, in CCYY format. Income tax examination, year Tax Year Subject To Examination Unrecognized tax benefits Unrecognized Tax Benefits Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingency Nature Loss Contingencies By Nature Of Contingency [Axis] Loss Contingency, Nature Loss Contingency Nature [Domain] Indemnification agreement [Member] Indemnification Guarantee [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Total manufacturing purchase commitments Purchase Commitment Remaining Minimum Amount Committed Payments under indemnification obligations Loss Contingency Damages Paid Value Liabilities recorded under indemnification obligations Loss Contingency Accrual At Carrying Value Concentration Risk [Table] Concentration Risk [Table] Geographical Statement Geographical [Axis] Geographical Segment Geographical [Domain] United States [Member] UNITED STATES Asia Pacific [Member] Asia Pacific [Member] Europe [Member] Europe [Member] Concentration Risk Benchmark Concentration Risk By Benchmark [Axis] Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Sales revenue, net [Member] Sales Revenue Net [Member] Accounts receivable [Member] Accounts Receivable [Member] Customer Major Customers [Axis] Customer Name Of Major Customer [Domain] Wintech Microelectronics Company, Limited. Wintech [Member] Wintech Microelectronics Company Limited [Member] Chicony Electronics Company Limited. Chicony [Member] Chicony Electronics Company Limited [Member] Hakuto Co., Ltd. Hakuto [Member] Hakuto Co Ltd [Member] Concentration Risk Type Concentration Risk By Type [Axis] Concentration Risk Type Concentration Risk Type [Domain] Customer concentration risk [Member] Customer Concentration Risk [Member] Credit concentration risk [Member] Credit Concentration Risk [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Number of reportable segment Number Of Reportable Segments Schedule Of Entity Wide Information Revenue From External Customers By Products And Services [Table] Schedule Of Entity Wide Information Revenue From External Customers By Products And Services [Table] Taiwan [Member] TAIWAN, PROVINCE OF CHINA North America other than united states. North America other than United States [Member] North America Other Than United States [Member] Revenue from External Customer [Line Items] Entity Wide Information Revenue From External Customer [Line Items] Total revenue Property and equipment, net Percentage of revenue Concentration Risk Percentage1 Accounts receivable Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Stock repurchase program additional fifty million authorization. Stock Repurchase Program $50.0 Million Authorization [Member] Stock Repurchase Program Additional Fifty Million Authorization [Member] Subsequent Event [Line Items] Subsequent Event [Line Items]