Investments, All Other Investments [Abstract]
One year or less
Marketable Securities, Current
One year through two years
Marketable Securities, Noncurrent
Marketable Securities
Marketable Securities
Balance Sheet Related Disclosures [Abstract]
Schedule of Property, Plant and Equipment [Table]
Property, Plant and Equipment [Table]
Property, Plant and Equipment by Type [Axis]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Domain]
Property, Plant and Equipment, Type [Domain]
Clinical and manufacturing equipment
Equipment [Member]
Computer hardware
Technology Equipment [Member]
Computer software
Software and Software Development Costs [Member]
Furniture and fixtures
Furniture and Fixtures [Member]
Leasehold improvements
Leasehold Improvements [Member]
Building
Building [Member]
Land
Land [Member]
Construction in progress
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net [Abstract]
Property, Plant and Equipment, Net [Abstract]
Property and equipment
Property, Plant and Equipment, Gross
Less: Accumulated depreciation and amortization
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Property, plant and equipment, net
Property, Plant and Equipment, Net
Depreciation and amortization
Depreciation, Depletion and Amortization, Nonproduction
Schedule of Available-for-sale Securities [Table]
Schedule of Available-for-sale Securities [Table]
Investment Type [Axis]
Investment Type [Axis]
Investments [Domain]
Investments [Domain]
Short-term Investments
Short-term Investments [Member]
Long Term Investments
Long Term Investments [Member]
Long Term Investments [Member]
Major Types of Debt and Equity Securities [Axis]
Major Types of Debt and Equity Securities [Axis]
Major Types of Debt and Equity Securities [Domain]
Major Types of Debt and Equity Securities [Domain]
Commercial paper
Commercial Paper [Member]
Corporate bonds
Corporate Debt Securities [Member]
Municipal Securities
Municipal Securities [Member]
Municipal Securities [Member]
U.S. government agency bonds
Agency Bonds [Member]
Agency Bonds [Member]
Asset-backed Securities
Asset-backed Securities [Member]
U.S. Government Treasury Bonds
U.S. Government Treasury Bonds [Member]
U.S. Government Treasury Bonds [Member]
Certificates of Deposit
Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost
Available-for-sale Securities, Amortized Cost Basis
Gross Unrealized Gains
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax
Gross Unrealized Losses
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax
Fair Value
Available-for-sale Securities
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 securities, short-term
Available-for-sale Securities, Debt Securities, Current
Accounts receivable, net of allowance for doubtful accounts and returns of $7,178 and $4,310, respectively
Accounts Receivable, Net, Current
Inventories
Inventory, Net
Prepaid expenses and other current assets
Prepaid Expense and Other Assets, Current
Total current assets
Assets, Current
Marketable securities, long-term
Available-for-sale Securities, Debt Securities, Noncurrent
Property, plant and equipment, net
Equity method investments
Equity Method Investments
Goodwill and intangible assets, net
Intangible Assets, Net (Including Goodwill)
Deferred tax assets
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent
Other assets
Other Assets, Noncurrent
Total assets
Assets
LIABILITIES AND STOCKHOLDERS’ EQUITY
Liabilities and Equity [Abstract]
Current liabilities:
Liabilities, Current [Abstract]
Accounts payable
Accounts Payable, Current
Accrued liabilities
Accrued Liabilities, Current
Deferred revenues
Deferred Revenue, Current
Total current liabilities
Liabilities, Current
Income tax payable
Taxes Payable
Other long-term liabilities
Other Liabilities, Noncurrent
Total liabilities
Liabilities
Commitments and contingencies (Notes 8 and 9)
Commitments and Contingencies
Stockholders’ equity:
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, $0.0001 par value (5,000 shares authorized; none issued)
Preferred Stock, Value, Issued
Common stock, $0.0001 par value (200,000 shares authorized; 80,040 and 79,553 issued and outstanding, respectively)
Common Stock, Value, Issued
Additional paid-in capital
Additional Paid in Capital
Accumulated other comprehensive income (loss), net
Accumulated Other Comprehensive Income (Loss), Net of Tax
Retained earnings
Retained Earnings (Accumulated Deficit)
Total stockholders’ equity
Stockholders' Equity Attributable to Parent
Total liabilities and stockholders’ equity
Liabilities and Equity
Valuation and Qualifying Accounts [Abstract]
Valuation and Qualifying Accounts Disclosure [Table]
Valuation and Qualifying Accounts Disclosure [Table]
Valuation Allowances and Reserves Type [Axis]
Valuation Allowances and Reserves Type [Axis]
Valuation Allowances and Reserves [Domain]
Valuation Allowances and Reserves [Domain]
Allowance for doubtful accounts
Allowance for Doubtful Accounts, Current [Member]
Allowance for deferred tax assets
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation and Qualifying Accounts Disclosure [Line Items]
Movement in Valuation Allowances and Reserves [Roll Forward]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period
Valuation Allowances and Reserves, Balance
Additions (reductions) to Costs and Expenses
Valuation Allowances And Reserves Charged To Cost And Expense Or Revenue
Valuation Allowances and Reserves, Charged to Cost and Expense or Revenue
Write offs
Valuation Allowances and Reserves, Deductions
Balance at End of Period
Common Stock Repurchase Program [Abstract]
Common Stock Repurchase Program [Abstract]
Share Repurchases [Table]
Share Repurchases [Table]
Share Repurchases [Table]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Subsequent Event
Subsequent Event [Member]
Share Repurchase Program [Axis]
Share Repurchase Program [Axis]
Share Repurchase Program [Domain]
Share Repurchase Program [Domain]
April 2014 Stock Repurchase Program
April 2014 Stock Repurchase Program [Member]
April 2014 Stock Repurchase Program [Member]
April 2016 Stock Repurchase Program
April 2016 Stock Repurchase Program [Member]
April 2016 Stock Repurchase Program [Member]
2017 ASR
ASR 2017 [Member]
ASR 2017 [Member]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Additional Paid-in Capital
Additional Paid-in Capital [Member]
Retained Earnings
Retained Earnings [Member]
Share Repurchases [Line Items]
Share Repurchases [Line Items]
Share Repurchases [Line Items]
Repurchase of common stock, common stock authorized
Stock Repurchase Program, Authorized Amount
Repurchase period
Stock Repurchase Program, Period in Force
Common stock repurchased and retired (shares)
Stock Repurchased and Retired During Period, Shares
Common stock repurchased (in dollars per share)
Share Repurchases Price Paid Per Share
Share Repurchases, Price Paid Per Share
Common stock repurchased and retired
Stock Repurchased and Retired During Period, Value
Authorized repurchase amount remaining
Stock Repurchase Program, Remaining Authorized Repurchase Amount
Accelerated share repurchase agreement amount
Accelerated Share Repurchase, Contracted Amount of Repurchase
Accelerated Share Repurchase, Contracted Amount of Repurchase
Accelerated share repurchase (in shares)
Accelerated Share Repurchase Program, Final Delivery of Shares, Shares
Accelerated Share Repurchase Program, Final Delivery of Shares, Shares
Accelerated share repurchases price per share (in dollars per share)
Accelerated Share Repurchases, Final Price Paid Per Share
Accounts receivable, allowance for doubtful accounts and returns
Allowance For Doubtful Accounts Receivable And Sales Returns Current
Allowance For Doubtful Accounts Receivable And Sales Returns Current
Preferred stock, par value (usd per share)
Preferred Stock, Par or Stated Value Per Share
Preferred stock, shares authorized (shares)
Preferred Stock, Shares Authorized
Preferred stock, issued (shares)
Preferred Stock, Shares Issued
Common stock, par value (usd per share)
Common Stock, Par or Stated Value Per Share
Common stock, shares authorized (shares)
Common Stock, Shares Authorized
Common stock, issued (shares)
Common Stock, Shares, Issued
Common stock, outstanding (shares)
Common Stock, Shares, Outstanding
Supplemental Cash Flow Information [Abstract]
Taxes paid
Income Taxes Paid
Non-cash investing and financing activities:
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Fixed assets acquired with accounts payable or accrued liabilities
Capital Expenditures Incurred but Not yet Paid
Fair value of option to purchase property
Contribution of Property
Compensation Related Costs [Abstract]
Employee Benefit Plans
Compensation and Employee Benefit Plans [Text Block]
Goodwill and Intangible Assets Disclosure [Abstract]
2018
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months
2019
Finite-Lived Intangible Assets, Amortization Expense, Year Two
2020
Finite-Lived Intangible Assets, Amortization Expense, Year Three
2021
Finite-Lived Intangible Assets, Amortization Expense, Year Four
2022
Finite-Lived Intangible Assets, Amortization Expense, Year Five
Thereafter
Finite-Lived Intangible Assets, Amortization Expense, after Year Five
Total
Finite-Lived Intangible Assets, Net
Commitments and Contingencies Disclosure [Abstract]
2018
Operating Leases, Future Minimum Payments Due, Next Twelve Months
2019
Operating Leases, Future Minimum Payments, Due in Two Years
2020
Operating Leases, Future Minimum Payments, Due in Three Years
2021
Operating Leases, Future Minimum Payments, Due in Four Years
2022
Operating Leases, Future Minimum Payments, Due in Five Years
Thereafter
Operating Leases, Future Minimum Payments, Due Thereafter
Total minimum lease payments
Operating Leases, Future Minimum Payments Due
Accounting Policies [Abstract]
Business Description
Description Of Business Policy [Policy Text Block]
Description of Business [Policy Text Block]
Basis of Presentation and Preparation
Basis Of Presentation [Policy Text Block]
Basis of Presentation [Policy Text Block]
Reclassification, Policy
Reclassification, Policy [Policy Text Block]
Use of estimates
Use of Estimates, Policy [Policy Text Block]
Fair Value of Financial instruments
Fair Value of Financial Instruments, Policy [Policy Text Block]
Cash and Cash Equivalents
Cash and Cash Equivalents, Policy [Policy Text Block]
Restricted Cash
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]
Marketable Securities
Marketable Securities, Policy [Policy Text Block]
Variable Interest Entities
Consolidation, Variable Interest Entity, Policy [Policy Text Block]
Investments in Privately Held Companies
Equity Method Investments [Policy Text Block]
Derivative Financial Instruments
Derivatives, Policy [Policy Text Block]
Foreign Currency
Foreign Currency Transactions and Translations Policy [Policy Text Block]
Certain Risks and Uncertainties
Concentration Risk, Credit Risk, Policy [Policy Text Block]
Inventories
Inventory, Policy [Policy Text Block]
Property, Plant and Equipment
Property, Plant and Equipment, Policy [Policy Text Block]
Goodwill and Finite-Lived Acquired Intangible Assets
Goodwill and Intangible Assets, Policy [Policy Text Block]
Impairment of Goodwill and Long-Lived Assets
Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block]
Development Costs for Internal Use Software
Research, Development, and Computer Software, Policy [Policy Text Block]
Product Warranty
Standard Product Warranty, Policy [Policy Text Block]
Allowance for Doubtful Accounts and Sales Returns
Receivables, Policy [Policy Text Block]
Revenue Recognition
Revenue Recognition, Policy [Policy Text Block]
Shipping and Handling Costs
Shipping and Handling Cost, Policy [Policy Text Block]
Legal Proceedings and Litigations
Commitments and Contingencies, Policy [Policy Text Block]
Research and Development
Research and Development Expense, Policy [Policy Text Block]
Advertising Costs
Advertising Costs, Policy [Policy Text Block]
Common Stock Repurchase
Stockholders' Equity, Policy [Policy Text Block]
Operating Leases
Lessor, Leases [Policy Text Block]
Income Taxes
Income Tax, Policy [Policy Text Block]
Stock-based compensation
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]
Comprehensive Income
Comprehensive Income, Policy [Policy Text Block]
Recent Accounting Pronouncements
New Accounting Pronouncements, Policy [Policy Text Block]
Net Income per Share
Earnings Per Share, Policy [Policy Text Block]
Equity [Abstract]
Number of shares issued (in thousands)
Stock Issued During Period, Shares, Employee Stock Purchase Plans
Weighted average price
Employee Stock Ownership Plan (ESOP), Weighted Average Purchase Price of Shares Purchased
Equity Method Investments and Joint Ventures [Abstract]
Schedule of Equity Method Investments [Table]
Schedule of Equity Method Investments [Table]
Investment, Name [Axis]
Investment, Name [Axis]
Investment, Name [Domain]
Investment, Name [Domain]
SDC
SDC [Member]
SDC [Member]
Disposal Group Classification [Axis]
Disposal Group Classification [Axis]
Disposal Group Classification [Domain]
Disposal Group Classification [Domain]
Schedule of Equity Method Investments [Line Items]
Schedule of Equity Method Investments [Line Items]
Ownership
Equity Method Investment, Ownership Percentage
Additional ownership acquired
Equity Method Investment Ownership Acquired
Equity Method Investment Ownership Acquired
Payments to acquire
Payments to Acquire Equity Method Investments
Equity method investment
Due from related parties
Due from Related Parties
Net revenues
Revenue, Net
Loan agreement reached
Loans And Leases Receivable Agreed Upon, Related Parties
Loans And Leases Receivable Agreed Upon, Related Parties
Loan receivable
Loans and Leases Receivable, Related Parties
Loan repayment from equity investee
Proceeds from Collection of Loans Receivable
Movement in Standard Product Warranty Accrual [Roll Forward]
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period
Standard Product Warranty Accrual
Charged to cost of revenues
Standard Product Warranty Accrual, Increase for Warranties Issued
Actual warranty expenditures
Standard Product Warranty Accrual, Decrease for Payments
Balance at end of period
Gain Contingencies [Table]
Gain Contingencies [Table]
Gain Contingencies, Nature [Axis]
Gain Contingencies, Nature [Axis]
Gain Contingency, Nature [Domain]
Gain Contingency, Nature [Domain]
Lawsuit against 3Shape A/S
Lawsuit against 3Shape A/S [Member]
Lawsuit against 3Shape A/S [Member]
3Shape violation of trade laws
Violation of Trade Laws 3Shape [Member]
Violation of Trade Laws 3Shape [Member]
Patent infringement by 3Shape
Patent Infringement by 3Shape [Member]
Patent Infringement by 3Shape [Member]
Gain Contingencies [Line Items]
Gain Contingencies [Line Items]
Number of lawsuits/complaints
Patent Infringement, Number of Lawsuits
Patent Infringement, Number of Lawsuits
Patents allegedly infringed upon
Gain Contingency, Patents Allegedly Infringed upon, Number
Income Tax Disclosure [Abstract]
Deferred tax assets:
Deferred Tax Assets, Net [Abstract]
Net operating loss and capital loss carryforwards
Deferred Tax Assets Net Operating And Capital Loss Carryforwards
Deferred Tax Assets, Net Operating and Capital Loss Carryforwards
Reserves and accruals
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals
Stock-based compensation
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost
Deferred revenue
Deferred Tax Assets, Deferred Income
Net translation losses
Deferred Tax Assets, Unrealized Currency Losses
Credit carryforwards
Deferred Tax Assets, Tax Credit Carryforwards
Total deferred tax assets, gross
Deferred Tax Assets, Gross
Deferred tax liabilities:
Deferred Tax Liabilities, Gross [Abstract]
Depreciation and amortization
Deferred Tax Liabilities, Property, Plant and Equipment
Unremitted foreign earnings
Deferred Tax Liabilities, Undistributed Foreign Earnings
Prepaid expenses
Deferred Tax Liabilities, Prepaid Expenses
Total deferred tax liabilities, gross
Deferred Tax Liabilities, Gross
Net deferred tax assets before valuation allowance
Deferred Tax Assets Liabilities Gross
Deferred Tax Assets (Liabilities), Gross
Valuation allowance
Deferred Tax Assets, Valuation Allowance
Net deferred tax assets
Deferred Tax Assets, Net
Schedule of Cash Flow, Supplemental Disclosures
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
Short-Term And Long-Term Marketable Securities
Available-for-sale Securities [Table Text Block]
Marketable Securities
Marketable Securities [Table Text Block]
Fair value, Assets measured on a recurring basis, unobservable input reconciliation
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Financial Assets Measured At Fair Value On A Recurring Basis
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
Equity Method Investments
Equity Method Investments and Joint Ventures Disclosure [Text Block]
Goodwill and Intangible Assets
Goodwill and Intangible Assets Disclosure [Text Block]
Earnings Per Share [Abstract]
Net Income per Share
Earnings Per Share [Text Block]
Income Taxes [Table]
Income Taxes [Table]
Income Taxes [Table]
Award Type [Axis]
Award Type [Axis]
Award Type [Domain]
Equity Award [Domain]
Stock Options
Employee Stock Option [Member]
Income Tax Authority [Axis]
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Income Tax Authority [Domain]
State and Local Jurisdiction
State and Local Jurisdiction [Member]
Foreign Country
Foreign Tax Authority [Member]
Geographical [Axis]
Geographical [Axis]
Geographical [Domain]
Geographical [Domain]
Costa Rica
COSTA RICA
Income Taxes [Line Items]
Income Taxes [Line Items]
Income Taxes [Line Items]
Additional income tax expense due to TCJA
Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Income Tax Expense (Benefit)
Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Income Tax Expense (Benefit)
Deferred tax liability due to TCJA
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Undistributed Accumulated Earnings of Foreign Subsidiary, Provisional Unrecognized Deferred Tax Liability
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Undistributed Accumulated Earnings of Foreign Subsidiary, Provisional Unrecognized Deferred Tax Liability
Deferred tax asset due to TCJA
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Undistributed Accumulated Earnings of Foreign Subsidiary, Provisional Unrecognized Deferred Tax Asset
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Undistributed Accumulated Earnings of Foreign Subsidiary, Provisional Unrecognized Deferred Tax Asset
Undistributed earnings of foreign subsidiaries
Undistributed Earnings of Foreign Subsidiaries
Amount of no longer indefinitely reinvested foreign earnings
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings Of Foreign Subsidiaries, No Longer Indefinitely Reinvested
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings Of Foreign Subsidiaries, No Longer Indefinitely Reinvested
Deferred tax liability due in event of foreign earnings being distributed
Deferred Tax Liability Not Recognized, Events that Would Cause Temporary Difference to be Taxable, Undistributed Earnings of Foreign Subsidiaries
Amount of indefinitely reinvested foreign earnings
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries
Tax incentives, corporate income tax rate that would apply absent the incentives
National Corporate Tax Rate
National Corporate Tax Rate
Tax incentives, reduction in income taxes
Income Tax Holiday, Aggregate Dollar Amount
Tax benefit of tax holiday on net income per share (diluted) (usd per share)
Income Tax Holiday, Income Tax Benefits Per Share
Deferred tax assets, valuation allowance
Change in valuation allowance
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount
Net operating loss carryforwards
Operating Loss Carryforwards
Unrecognized tax benefits that would impact effective tax rate
Unrecognized Tax Benefits that Would Impact Effective Tax Rate
Unrecognized tax benefits
Unrecognized Tax Benefits
Interest and penalties expense
Income Tax Examination, Penalties and Interest Expense
Unrecognized Tax Benefits, Interest on Income Taxes Accrued
Unrecognized Tax Benefits, Interest on Income Taxes Accrued
Expense related to restructuring
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount
Schedule of Goodwill [Table]
Schedule of Goodwill [Table]
Segments [Axis]
Segments [Axis]
Segments [Domain]
Segments [Domain]
Clear Aligner
Clear Aligner [Member]
Clear Aligner [Member]
Goodwill [Line Items]
Goodwill [Line Items]
Goodwill [Roll Forward]
Goodwill [Roll Forward]
Balance, Beginning Balance
Goodwill
Adjustments
Goodwill, Foreign Currency Translation Gain (Loss)
Goodwill from distributor acquisitions
Goodwill, Acquired During Period
Balance, Ending Balance
Stockholders' Equity Note [Abstract]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Market Performance Based Restricted Stock Units
Market Performance Based Restricted Stock Units [Member]
Market Performance Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term
Expected 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 dividends
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Weighted average fair value per share at grant date (usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value
Stockholders' Equity
Stockholders' Equity Note Disclosure [Text Block]
Marketable Securities and Fair Value Measurements [Abstract]
Marketable Securities and Fair Value Measurements [Abstract]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value, Hierarchy [Axis]
Fair Value, Hierarchy [Axis]
Fair Value Hierarchy [Domain]
Fair Value Hierarchy [Domain]
Fair Value, Inputs, Level 3
Fair Value, Inputs, Level 3 [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]
Original maturity of highly liquid investments included in Cash and cash equivalents
Maturity Period Used To Classify Investments
Maturity Period Used to Classify Investments
Weighted average maturity
Marketable Securities, Weighted Average Remaining Maturity
Marketable Securities, Weighted Average Remaining Maturity
Fair value
Notes Receivable, Fair Value Disclosure
Summary of Significant Accounting Policies
Significant Accounting Policies [Text Block]
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]
Weighted average fair value at grant date (usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Schedule of Deferred Compensation Arrangement with Individual, Postretirement Benefits [Table]
Schedule of Deferred Compensation Arrangement with Individual, Postretirement Benefits [Table]
Deferred Compensation Arrangement with Individual, Postretirement Benefits, by Type of Deferred Compensation [Axis]
Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Axis]
Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Domain]
Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Domain]
Defined Contribution Pension Plan 401k
Other Postretirement Benefits Plan [Member]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Maximum
Maximum [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Employer matching contribution as percentage of employee's salary deferral contributions
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
Employer matching contribution as percentage of employee's eligible compensation
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent
Employer contributions amount
Deferred Compensation Arrangement with Individual, Contributions by Employer
Accrued severance funds liability
Supplemental Unemployment Benefits, Severance Benefits
Statement of Comprehensive Income [Abstract]
Net income
Net Income (Loss) Attributable to Parent
Net change in foreign currency translation adjustment
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax
Change in unrealized gains (losses) on investments, net of tax
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Accrued payroll and benefits
Employee-related Liabilities, Current
Accrued expenses
Accrued Sales And Marketing Current
Accrued Sales and Marketing, Current
Accrued income taxes
Accrued Income Taxes, Current
Accrued sales rebate
Accrued Marketing Costs, Current
Accrued professional fees
Accrued Professional Fees, Current
Accrued warranty
Standard Product Warranty Accrual, Current
Accrued sales tax and value added tax
Sales and Excise Tax Payable, Current
Other accrued liabilities
Other Accrued Liabilities, Current
Total current accrued liabilities
Segments and Geographical Information
Segment Reporting Disclosure [Text Block]
Number of Shares Underlying Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding beginning balance (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number
Granted (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross
Exercised (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Cancelled or expired (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period
Outstanding ending balance (shares)
Vested and expected to vest at December 31, 2013 (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number
Exercisable at December 31, 2013 (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number
Weighted Average Exercise Price per Share
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding beginning balance (usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Granted (usd per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Exercised (usd per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Cancelled or expired (usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price
Outstanding ending balance (usd per share)
Vested and expected to vest at December 31, 2013 (usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price
Exercisable at December 31, 2013 (usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Weighted Average Remaining Contractual Term (in years)
Share Based Compensation Arrangement By Share Based Payment Award Options Weighted Average Remaining Contractual Term [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Remaining Contractual Term [Abstract]
Outstanding as of December 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
Vested and expected to vest at December 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term
Exercisable at December 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term
Aggregate Intrinsic Value
Share Based Compensation Arrangement By Share Based Payment Award Options Aggregate Intrinsic Value [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Abstract]
Outstanding as of December 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value
Vested and expected to vest at December 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value
Exercisable at December 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation[Roll Forward]
Beginning balance
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value
Additional notes receivable issued
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances
Accrued interest receivable
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Accrual
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Accrual
Change in fair value recognized in earnings
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings
Ending balance
Income Statement [Abstract]
Cost of net revenues
Cost of Revenue
Gross profit
Gross Profit
Operating expenses:
Operating Expenses [Abstract]
Selling, general and administrative
Selling and Marketing Expense
Research and development
Research and Development Expense
Total operating expenses
Operating Expenses
Income from operations
Operating Income (Loss)
Interest and other income (expense), net
Other Nonoperating Income (Expense)
Net income before provision for income taxes and equity in losses of investee
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Provision for income taxes
Income Tax Expense (Benefit)
Equity in losses of investee, net of tax
Income (Loss) from Equity Method Investments
Net income
Net income per share:
Basic (usd per share)
Earnings Per Share, Basic
Diluted (usd per share)
Earnings Per Share, Diluted
Shares used in computing net income per share:
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic (shares)
Weighted Average Number of Shares Outstanding, Basic
Diluted (shares)
Weighted Average Number of Shares Outstanding, Diluted
Number of reportable segments
Number of Reportable Segments
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefit as of beginning of period
Tax positions related to current year, additions for uncertain tax positions
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions
Tax positions related to prior year, Additions for uncertain tax positions
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions
Tax positions related to prior year, Decreases for uncertain tax positions
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions
Tax positions related to prior year, Settlements with tax authorities
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities
Tax positions related to prior year, Reductions due to lapse of applicable statute of limitations
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations
Unrecognized tax benefit as of end of period
Restricted Stock Units (RSUs)
Restricted Stock Units (RSUs) [Member]
Shares Underlying RSUs
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested beginning balance (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Granted (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Vested and released (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Forfeited (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Nonvested ending balance (shares)
Nonvested, beginning balance (usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Granted (usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Vested and released (usd per share)
Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Vested And Released In Period Weighted Average Grant Date Fair Value
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options Vested And Released In Period Weighted Average Grant Date Fair Value
Forfeited (usd per share)
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeits In Period Weighted Average Grant Date Fair Value
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeits In Period Weighted Average Grant Date Fair Value
Nonvested, ending balance (usd per share)
Weighted Remaining Vesting Period (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Nonvested as of December 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms
Aggregate Intrinsic Value
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value [Abstract]
Nonvested as of December 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Total Intrinsic Value
Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options, Nonvested, Total Intrinsic Value
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 [Axis]
Income Statement Location [Axis]
Income Statement Location [Domain]
Income Statement Location [Domain]
Cost of net revenues
Cost of Sales [Member]
Selling, general and administrative
Selling, General and Administrative Expenses [Member]
Research and development
Research and Development Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense
Allocated Share-based Compensation Expense
Scanners, Warranty period
Standard Product Warranty Time Period
Standard Product Warranty Time Period
Income Taxes
Income Tax Disclosure [Text Block]
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Document Documentand Entity Information [Abstract]
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 Common Stock, Shares Outstanding (shares)
Entity Common Stock, Shares Outstanding
Entity Well-known Seasoned Issuer
Entity Well-known Seasoned Issuer
Entity Public Float
Entity Public Float
Entity Current Reporting Status
Entity Current Reporting Status
Entity Voluntary Filers
Entity Voluntary Filers
Debt Disclosure [Abstract]
Credit Facilities
Debt Disclosure [Text Block]
Domestic
Income (Loss) from Continuing Operations before Income Taxes, Domestic
Foreign
Income (Loss) from Continuing Operations before Income Taxes, Foreign
Stockholders Equity Note [Table]
Stockholders Equity Note [Table]
Stockholders Equity Note [Table]
Vesting [Axis]
Vesting [Axis]
Vesting [Domain]
Vesting [Domain]
Monthly Vesting
Monthly Vesting [Member]
Monthly Vesting [Member]
Plan Name [Axis]
Plan Name [Axis]
Plan Name [Domain]
Plan Name [Domain]
Employee Stock Incentive Plan 2005
Employee Stock Incentive Plan 2005 [Member]
Employee Stock Incentive Plan 2005 [Member]
Employee Stock Purchase Plan 2010
Employee Stock Purchase Plan 2010 [Member]
Employee Stock Purchase Plan, 2010 [Member]
Employee Stock Purchase Plan
Employee Stock Purchase Plan [Member]
Employee Stock Purchase Plan [Member]
Schedule of Share-based Compensation Arrangement by Share-based Payment Award [Axis]
Schedule Of Share Based Compensation Arrangement By Share Based Payment Award [Axis]
Schedule of Share-based Compensation Arrangement by Share-based Payment Award [Axis]
Share-based Compensation Arrangements by Share-based Payment Award [Domain]
Share Based Compensation Arrangements By Share Based Payment Award [Domain]
Share-based Compensation Arrangements by Share-based Payment Award [Domain]
Stockholder Rights Plan
Stockholder Rights Plan [Member]
Stockholder Rights Plan [Member]
Incentive Plan 2005
Stock Incentive Plan 2005 [Member]
2005 Stock Incentive Plan [Member]
Amended And Restated 2005 Stock Incentive Plan
Amended And Restated 2005 Stock Incentive Plan [Member]
Amended And Restated 2005 Stock Incentive Plan [Member]
2001 Purchase Plan
Stock Plan 2001 [Member]
Stock Plan 2001 [Member]
Minimum
Minimum [Member]
Stockholders Equity Note [Line Items]
Stockholders Equity Note [Line Items]
Stockholders Equity Note [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Shares Remaining Available For Issuance
Share Based Compensation Arrangement By Share Based Payment Award Shares Remaining Available For Issuance
Share Based Compensation Arrangement By Share Based Payment Award Shares Remaining Available For Issuance
Weighted award against authorized maximum (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights
Number of shares called by each right (shares)
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right
Shares reserved for issuance
Common Stock, Capital Shares Reserved for Future Issuance
Stock incentive plan, vesting period
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Stock incentive plan, vesting percentage
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage
Share Based Compensation Arrangement by Share based Payment Award, Vesting Percentage
Total intrinsic value of stock options exercised
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value
Vested rand released in period, Total intrinsic value
Share Based Compensation Arrangement, By Share-based Payment Award, Equity Instruments Other Than Options, Vested And Released, Total Intrinsic Value
Share Based Compensation Arrangement, By Share-based Payment Award, Equity Instruments Other Than Options, Vested And Released, Total Intrinsic Value
Vested in period, Fair value
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Total unamortized compensation cost
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized
Weighted average period of total unamortized cost
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition
Restricted stock units, shares vested and released (shares)
Restricted stock units, shares withheld for tax payments
Shares Paid for Tax Withholding for Share Based Compensation
Restricted stock units, net issuance
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings
Employees’ taxes paid upon the vesting of restricted stock units
Payments Related to Tax Withholding for Share-based Compensation
Percentage of market-performance based restricted stock units eligible to vest over the vesting period
Percentage Of Market Performance Based Restricted Stock Units During Vesting Period
Maximum percentage of market-performance based restricted stock units during vesting period.
Employee Stock Purchase Plan, Duration Of Offering Period
Employee Stock Purchase Plan, Duration Of Offering Period
Employee Stock Purchase Plan, Duration Of Offering Period
Employee stock purchase plan, purchase price as percentage of fair market value of common stock
Share Based Compensation Arrangement By Share Based Payment Award Purchase Price Percentage Of Fair Market Value
Share Based Compensation Arrangement by Share Based Payment Award, Purchase Price, Percentage of Fair Market Value
Number of offering periods
Employee Stock Purchase Plan, Number Of Six Month Purchasing Periods
Employee Stock Purchase Plan, Number Of Six Month Purchasing Periods
Maximum number of shares available
Employee Stock Purchase Plan Number Of Shares Available For Issuance
Employee Stock Purchase Plan, Number Of Shares Available for Issuance
Number of shares available for grant (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant
Share-based Compensation Arrangement by Share-based Payment Award, Weight Of Awarded Shares Against Authorized Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Weight Of Awarded Shares Against Authorized Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Weight Of Awarded Shares Against Authorized Maximum
Legal Proceedings
Legal Matters and Contingencies [Text Block]
Schedule of Finite-Lived Intangible Assets by Major Class [Table]
Schedule of Finite-Lived Intangible Assets [Table]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Trademarks
Trademarks [Member]
Existing technology
Existing Technology [Member]
Existing Technology [Member]
Customer Relationships
Customer Relationships [Member]
Distribution Rights
Distribution Rights [Member]
Patents
Patents [Member]
Other Intangible Assets
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangibles
Finite-Lived Intangible Asset, Useful Life
Gross Carrying Amount
Finite-Lived Intangible Assets, Gross
Accumulated Amortization
Finite-Lived Intangible Assets, Accumulated Amortization
Accumulated Impairment Loss
Finite-Lived Intangible Assets, Accumulated Impairment Loss
Finite-Lived Intangible Assets, Accumulated Impairment Loss
Supplemental Cash Flow Information
Cash Flow, Supplemental Disclosures [Text Block]
Number of Shares
Nonvested (usd per share)
Vested and released (usd per share)
Weighted Average Remaining Contractual Term
Nonvested
Nonvested
Schedule of Earnings Per Share Basic And Diluted
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Statement of Stockholders' Equity [Abstract]
Statement [Table]
Statement [Table]
Common Stock
Common Stock [Member]
Additional Paid-In Capital
Accumulated Other Comprehensive Income (Loss), Net
AOCI Attributable to Parent [Member]
Retained Earnings (Deficit)
Statement [Line Items]
Statement [Line Items]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance (in shares)
Shares, Outstanding
Beginning Balance
Cumulative effect adjustment from adoption of ASU 2016-16
Cumulative Effect of New Accounting Principle in Period of Adoption
Net change in unrealized gains (losses) from investments
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax
Net change in foreign currency translation adjustment
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Issuance of common stock relating to employee equity compensation plans (in shares)
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures
Issuance of common stock relating to employee equity compensation plans
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures
Tax withholdings related to net share settlements of restricted stock units
Tax Withholding Related To Vesting Of Restricted Stock Units
Tax Withholding Related to Vesting of Restricted Stock Units
Common stock repurchased and retired (shares)
Common stock repurchased and retired
Net tax benefits from stock-based awards
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation
Stock-based compensation
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition
Ending Balance (in shares)
Ending Balance
Other Commitments [Table]
Other Commitments [Table]
Ziyang, China
CHINA
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Belen Business Center
Belen Business Center [Member]
Belen Business Center [Member]
Counterparty Name [Axis]
Counterparty Name [Axis]
Counterparty Name [Domain]
Counterparty Name [Domain]
Other Commitments [Axis]
Other Commitments [Axis]
Other Commitments [Domain]
Other Commitments [Domain]
Commitments To Purchase Convertible Promissory Notes With Privately Held Company [Member]
Commitments To Purchase Convertible Promissory Notes With Privately Held Company [Member]
Commitments To Purchase Convertible Promissory Notes With Private Party [Member]
Other Commitments [Line Items]
Other Commitments [Line Items]
Total rent expense
Operating Leases, Rent Expense, Net
Loans and Leases Receivable, Commitments, Fixed Rates
Loans and Leases Receivable, Commitments, Fixed Rates
Loans And Leases Receivable, Borrowing Base As A Percentage Of Accounts Receivable
Loans And Leases Receivable, Borrowing Base As A Percentage Of Accounts Receivable
Loans And Leases Receivable, Borrowing Base As A Percentage Of Accounts Receivable
Loans And Leases Receivable, Commitments, Fixed Rates, State Rate
Loans And Leases Receivable, Commitments, Fixed Rates, State Rate
Loans And Leases Receivable, Commitments, Fixed Rates, State Rate
Other commitment
Other Commitment
Other Commitments, Future Minimum Payments, Remainder of Fiscal Year
Other Commitments, Future Minimum Payments, Remainder of Fiscal Year
Other Commitment, Due in Second Year
Other Commitment, Due in Second Year
Interest rate on borrowings at LIBOR plus
Debt Instrument, Interest Rate, Stated Percentage
Software
Software Subscription Commitment
Software Subscription Commitment
Software term
Software Subscription Term
Software Subscription Term
Consideration transferred
Business Combination, Consideration Transferred
Committed investment minimum
Investment Company, Committed Capital
Deposit
Purchase Deposit
Purchase Deposit
Minimum purchase amount commitment
Purchase Commitment, Remaining Minimum Amount Committed
Schedule of Inventories
Schedule of Inventory, Current [Table Text Block]
Property, Plant and Equipment
Property, Plant and Equipment [Table Text Block]
Schedule of Accrued Liabilities
Schedule of Accrued Liabilities [Table Text Block]
Warranty accrual
Schedule of Product Warranty Liability [Table Text Block]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Table]
Fair Value Assets And Liabilities Measured On Recurring Basis [Table]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Table]
Money market funds
Money Market Funds [Member]
Corporate bonds
Corporate Bond Securities [Member]
Israeli funds
Israeli Severance Funds [Member]
Israeli Severance Funds [Member]
Fair Value by Measurement Frequency [Axis]
Measurement Frequency [Axis]
Fair Value, Measurement Frequency [Domain]
Fair Value, Measurement Frequency [Domain]
Fair Value, Measurements, Recurring
Fair Value, Measurements, Recurring [Member]
Fair Value, Measurements, Fair Value Hierarchy [Domain]
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Inputs, Level 1 [Member]
Significant Other Observable Inputs (Level 2)
Fair Value, Inputs, Level 2 [Member]
Cash Equivalents
Cash Equivalents [Member]
Other assets
Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Money market funds
Cash and Cash Equivalents, Fair Value Disclosure
Investments
Other assets
Other Assets, Fair Value Disclosure
Notes Receivable, Fair Value Disclosure
Assets measured at fair value
Assets, Fair Value Disclosure
Business Combinations [Abstract]
Business Combinations
Business Combination Disclosure [Text Block]
Statement of Cash Flows [Abstract]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Cash Provided by (Used in) Operating Activities [Abstract]
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Deferred taxes
Deferred Income Tax Expense (Benefit)
Depreciation and amortization
Depreciation, Depletion and Amortization
Stock-based compensation
Share-based Compensation
Net tax benefits from stock-based awards
Excess Tax Benefit from Share-based Compensation, Operating Activities
Excess tax benefit from share-based payment arrangements
Excess Tax Charge Benefit From Share Based Compensation Operating Activities
Excess Tax Charge (Benefit) from Share based Compensation, Operating Activities
Equity in losses of investee
Other non-cash operating activities
Other Noncash Income (Expense)
Changes in assets and liabilities, net of effects of acquisitions:
Increase (Decrease) in Operating Capital [Abstract]
Accounts receivable
Increase (Decrease) in Accounts Receivable
Inventories
Increase (Decrease) in Inventories
Prepaid expenses and other assets
Increase (Decrease) in Prepaid Expense and Other Assets
Accounts payable
Increase (Decrease) in Accounts Payable
Accrued and other long-term liabilities
Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities
Long-term income tax payable
Increase (Decrease) in Income Taxes Payable
Deferred revenues
Increase (Decrease) in Deferred Revenue
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]
Acquisition, net of cash acquired
Payments to Acquire Businesses, Net of Cash Acquired
Purchase of property, plant and equipment
Payments to Acquire Property, Plant, and Equipment
Purchase of marketable securities
Payments to Acquire Available-for-sale Securities
Proceeds from maturities of marketable securities
Proceeds from Sale and Maturity of Available-for-sale Securities
Purchase of equity method investments
Proceeds from sales of marketable securities
Proceeds from Sale and Maturity of Marketable Securities
Loan advances to equity investee
Payments to Acquire Loans Receivable
Other investing activities
Payments for (Proceeds from) Other Investing Activities
Net cash provided by (used in) investing activities
Net Cash Provided by (Used in) Investing Activities
CASH FLOWS FROM FINANCING ACTIVITIES:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Proceeds from issuance of common stock
Proceeds from Issuance of Common Stock
Common stock repurchases
Payments for Repurchase of Common Stock
Excess tax benefit from share-based payment arrangements
Excess Tax Benefit from Share-based Compensation, Financing Activities
Net cash used in financing activities
Net Cash Provided by (Used in) Financing Activities
Effect of foreign exchange rate changes on cash and cash equivalents
Effect of Exchange Rate on Cash and Cash Equivalents
Net increase (decrease) in cash and cash equivalents
Cash and Cash Equivalents, Period Increase (Decrease)
Cash and cash equivalents, beginning of year
Cash and cash equivalents, end of year
Numerator:
Net Income (Loss) Available to Common Stockholders, Basic [Abstract]
Denominator:
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted-average common shares outstanding, basic (shares)
Dilutive effect of potential common stock (shares)
Weighted Average Number Diluted Shares Outstanding Adjustment
Total shares, diluted (shares)
Net income per share, basic (usd per share)
Net income per share, diluted (usd per share)
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Clear Aligner
Invisalign Full [Member]
Invisalign Full [Member]
Scanner and Services
Invisalign ExpressLite [Member]
Invisalign Express/Lite [Member]
Scanners And Services
Scanners And Services [Member]
Scanners and Services [Member]
Corporate, Non-Segment
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Revenue
Gross profit
Operating Income (Loss)
Notes To Financial Statements [Abstract]
Notes to Financial Statements [Abstract]
Share Repurchase Program Disclosure
Share Repurchase Program Disclosure [Text Block]
Share Repurchase Program Disclosure
Significant Accounting Policies [Table]
Significant Accounting Policies [Table]
Significant Accounting Policies [Table]
Adjustments for New Accounting Pronouncements [Axis]
Adjustments for New Accounting Pronouncements [Axis]
Type of Adoption [Domain]
Type of Adoption [Domain]
Accounting Standards Update 2016-09
Accounting Standards Update 2016-09 [Member]
Accounting Standards Update 2016-16
Accounting Standards Update 2016-16 [Member]
Scenario [Axis]
Scenario [Axis]
Scenario, Unspecified [Domain]
Scenario, Unspecified [Domain]
Scenario, Adjustment
Scenario, Adjustment [Member]
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Noncurrent Assets
Noncurrent Assets [Member]
Noncurrent Assets [Member]
Other Noncurrent Assets
Other Noncurrent Assets [Member]
Prepaid Expenses and Other Current Assets
Prepaid Expenses and Other Current Assets [Member]
Other Current Assets
Other Current Assets [Member]
Significant Accounting Policies [Line Items]
Significant Accounting Policies [Line Items]
Significant Accounting Policies [Line Items]
Number of operating segments
Number of Operating Segments
Interest and other income (expense) net
Nonoperating Income (Expense)
Restricted cash
Restricted Cash and Cash Equivalents, Current
Restricted Cash and Cash Equivalents
Restricted Cash and Cash Equivalents
Foreign currency net gains (losses)
Foreign Currency Transaction Gain (Loss), Realized
Number of financial instutions used
Cash, Financial Institutions Used
Cash, Financial Institutions Used
Capitalized software costs
Capitalized Computer Software, Gross
Treatment Plans, Period For Additional Replacements For No Charge
Treatment Plans, Period For Additional Replacements For No Charge
Treatment Plans, Period For Additional Replacements For No Charge
Treatment Plans, Number Of Optional Replacements
Treatment Plans, Number Of Optional Replacements
Treatment Plans, Number Of Optional Replacements
Treatment Plan, Number Of Batches/Stages
Treatment Plan, Number Of Batches/Stages
Treatment Plan, Number Of Batches/Stages
Advertising cost
Advertising Expense
Lease term
Lease Term
Lease Term
Tax benefit
Effective Income Tax Rate Reconciliation Share based Compensation Excess Tax Benefit Amount
Effective Income Tax Rate Reconciliation Share based Compensation Excess Tax Benefit Amount
Decrease to retained earnings
Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle
Stock Option
Equity Option [Member]
Stock-based Compensation Expense
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]
Stock Option Activity
Share-based Compensation, Stock Options, Activity [Table Text Block]
Summary of Nonvested Shares
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
Summary of Nonvested Shares
Schedule of Nonvested Performance-based Units Activity [Table Text Block]
Fair value assumptions using the Monte Carlo simulation
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Method Used Table [Text Block]
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Method Used [Table Text Block]
Schedule of ESPP share activity
Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block]
Weighted Average Assumptions Used for the Fair Value of Options Component of Purchase Plan Granted Estimated at Grant Date
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]
Schedule of Future Lease Payments
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Consolidation Items [Axis]
Consolidation Items [Axis]
Consolidation Items [Domain]
Consolidation Items [Domain]
Operating Segments [Member]
Operating Segments [Member]
United States
UNITED STATES
the Netherlands
NETHERLANDS
Other international
Other International [Member]
Other International [Member]
Balance Sheet Components
Supplemental Balance Sheet Disclosures [Text Block]
U.S. federal statutory income tax rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
State income taxes, net of federal tax benefit
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent
Impact of U.S. Tax Cuts and Jobs Act
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017
Impact of differences in foreign tax rates
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent
Valuation allowance release for Israel
Effective Income Tax Rate Reconciliation, Valuation Allowance Release For Foreign Country
Effective Income Tax Rate Reconciliation, Valuation Allowance Release For Foreign Country
Stock-based compensation
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent
Other items not individually material
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent
Effective Income Tax Rate, Continuing Operations, Total
Effective Income Tax Rate Reconciliation, Percent
Mexico
MEXICO
China
Long-Lived Assets
Long-Lived Assets
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
Certain Distributors
Certain Distributors [Member]
Certain Distributors [Member]
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Cash consideration
Payments to Acquire Businesses, Gross
Net tangible liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities
Intangibles acquired
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill
Goodwill and intangible assets, net
Raw materials
Inventory, Raw Materials, Net of Reserves
Work in process
Inventory, Work in Process, Net of Reserves
Finished goods
Inventory, Finished Goods, Net of Reserves
Inventories
Marketable Securities and Fair Value Measurements
Financial Instruments Disclosure [Text Block]
Schedule of Income before Income Tax, Domestic and Foreign
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
Schedule of Components of Income Tax Expense (Benefit)
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of Effective Income Tax Rate Reconciliation
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Schedule of Deferred Tax Assets and Liabilities
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Schedule of Unrecognized Tax Benefits Rollforward
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Federal
Federal Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current
Current Federal Tax Expense (Benefit)
Deferred
Deferred Federal Income Tax Expense (Benefit)
Total federal income tax expense
Federal Income Tax Expense (Benefit), Continuing Operations
State
State and Local Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current
Current State and Local Tax Expense (Benefit)
Deferred
Deferred State and Local Income Tax Expense (Benefit)
Total state tax expense
State and Local Income Tax Expense (Benefit), Continuing Operations
Foreign
Foreign Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current
Current Foreign Tax Expense (Benefit)
Deferred
Deferred Foreign Income Tax Expense (Benefit)
Total foreign tax expense
Foreign Income Tax Expense (Benefit), Continuing Operations
Provision for income taxes
Schedule of Goodwill
Schedule of Goodwill [Table Text Block]
Schedule of Amortized Intangible Assets
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Schedule of Future Amortization for Finited-Lived Intangible Assets
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Schedule II: Valuation and Qualifying Accounts and Reserves
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Line of Credit Facility [Table]
Line of Credit Facility [Table]
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
Base rate
Base Rate [Member]
LIBOR rate
London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility [Line Items]
Line of credit, available borrowings
Line of Credit Facility, Maximum Borrowing Capacity
Current borrowing capacity
Line of Credit Facility, Current Borrowing Capacity
Interest rate on borrowings
Basis spread on variable rate
Debt Instrument, Basis Spread on Variable Rate
Line of credit, amount outstanding
Long-term Line of Credit