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Thousand and Twenty Five Senior Notes Debt Instrument [Line Items] Debt Instrument [Line Items] Trading Symbol Trading Symbol Foreign Exchange Contract Foreign Exchange Contract [Member] Options outstanding, weighted average exercise price (in dollars per share) Options outstanding, weighted average exercise price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Summary of Right-of-Use Assets and Lease Liabilities Summary of Right-of-Use Assets and Lease Liabilities [Table Text Block] Summary of Right-of-Use Assets and Lease Liabilities [Table Text Block] Stock-based compensation Share-based Payment Arrangement, Expense Convertible Debt Securities Convertible Debt Securities [Member] Options exercisable at the end of the year, weighted average remaining contractual life (Year) Options exercisable, weighted average remaining contractual life (years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Entity Current Reporting Status Entity Current Reporting Status Weighted- average grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Investments [Domain] Investments [Domain] Amortization of debt issuance costs Amortization of Debt Issuance Costs Proceeds from sales and maturities of marketable securities Proceeds from Sale and Maturity of Marketable Securities Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents United States UNITED STATES Sale of stock, number of shares issued in transaction Sale of Stock, Number of Shares Issued in Transaction Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Current assets: Assets, Current [Abstract] Total intangible assets Finite-Lived Intangible Assets, Gross Common stock, capital shares reserved for future issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Award Date [Axis] Award Date [Axis] Leases [Abstract] Leases [Abstract] Schedule of Finite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Entity Address, Postal Zip Code Entity Address, Postal Zip Code Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Revenue Recognition and Contract Costs Revenue from Contract with Customer [Policy Text Block] Principal Debt Instrument, Face Amount Including Additional Purchases from Exercised Options Debt Instrument, Face Amount Including Additional Purchases from Exercised Options Weighted average number of shares used in computing net loss per share of common stock, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Exercise Price Range [Domain] Exercise Price Range [Domain] Fair Value, Recurring Fair Value, Recurring [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Share-based Compensation, Stock Options, Activity Share-based Payment Arrangement, Option, Activity [Table Text Block] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Credit Facility [Axis] Credit Facility [Axis] Entity Address, Address Line One Entity Address, Address Line One Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Vested, weighted average grant date fair value on restricted stock units and performance stock units (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value General and administrative General and Administrative Expense [Member] Entity Shell Company Entity Shell Company Total current liabilities Liabilities, Current Developed technology & trademarks Developed Technology Rights and Trademarks [Member] Developed Technology Rights and Trademarks Taxes paid related to net share settlement of equity awards Payment, Tax Withholding, Share-based Payment Arrangement Forward foreign exchange contracts Foreign Exchange Forward [Member] Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Money market funds Money Market Funds [Member] Revenue Revenue from Contract with Customer, Including Assessed Tax Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Percentage of outstanding stock maximum Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum Current Fiscal Year End Date Current Fiscal Year End Date Percent of shares increase, employee stock purchase plan vrns_PercentOfSharesIncreaseEmployeeStockPurchasePlan Percent of the Company's issued and outstanding common stock on each December 31 immediately prior to the date of increase, that an ESPP may be increased. Consultants Consultants [Member] Represents information pertaining to consultants. Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Long-lived assets Long-Lived Assets Proceeds from employee stock plans Proceeds from Stock Plans Statement [Table] Statement [Table] Number of shares underlying outstanding RSUs and PSUs Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] Recently Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Other long-term assets Increase (Decrease) in Other Noncurrent Assets Prepaid Expenses and Other Current Assets Prepaid Expenses and Other Current Assets [Member] Short-term deposits Deposits Assets, Current Derivative liability, fair value Derivative Liability, Fair Value, Gross Liability North America North America [Member] August 2013 August 2013 [Member] Represents information that came about in August of 2013. Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Total intangible assets, net Finite-Lived Intangible Assets, Net Goodwill Goodwill Options outstanding, exercise price range (in shares) Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding Cost of revenues Cost of Sales [Member] 2015 ESPP 2015 ESPP [Member] Represents the 2015 Employee Stock Purchase Plan. 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] Subscriptions Subscription and Circulation [Member] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Accounting Standards Update 2020-06 [Member]