Significant Accounting Policies | SIGNIFICANT ACCOUNTING POLICIES The consolidated financial statements are prepared according to United States generally accepted accounting principles (“U.S. GAAP”), applied on a consistent basis, as follows: a. Use of Estimates: The preparation of the consolidated financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates, judgments and assumptions. The Company’s management believes that the estimates, judgments and assumptions used are reasonable based upon information available at the time they are made. These estimates, judgments and assumptions can affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. On an ongoing basis, the Company’s management evaluates estimates, including those related to accounts receivable and sales allowances, fair values of stock-based awards, deferred taxes and income tax uncertainties, and contingent liabilities. Such estimates are based on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. b. Financial Statements in U.S. Dollars: Most of the revenues and costs of VSI are denominated in United States dollars (“dollars”). Some of the subsidiaries’ revenues and costs are primarily incurred in Euros, the Pound Sterling, Canadian dollars, Australian dollars and NIS; however, the Company’s management believes that the dollar is the primary currency of the economic environment in which VSI and each of its subsidiaries operate. Thus, the dollar is the Company’s functional and reporting currency. Accordingly, transactions denominated in currencies other than the functional currency are re-measured to the functional currency in accordance with ASC No. 830, “Foreign Currency Matters” at the exchange rate at the date of the transaction or the average exchange rate in the quarter. At the end of each reporting period, financial assets and liabilities are re-measured to the functional currency using exchange rates in effect at the balance sheet date. Non-financial assets and liabilities are re-measured at historical exchange rates. Gains and losses related to re-measurement are recorded as financial income (expense) in the consolidated statements of operations as appropriate. c. Principles of Consolidation: The consolidated financial statements include the accounts of VSI and its wholly-owned subsidiaries, VSL, VSUK, VSG, VSF, VSC, VIRE, VAUS, VNL, VPS and VLUX. All intercompany transactions and balances have been eliminated upon consolidation. d. Cash, Cash Equivalents, Marketable Securities and Short-Term Deposits: The Company accounts for investments in marketable securities in accordance with ASC No. 320, “Investments—Debt and Equity Securities”. The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents. Cash and cash equivalents consist of cash on hand, highly liquid investments in money market funds and various deposit accounts. The Company considers all high quality investments purchased with original maturities at the date of purchase greater than three months to be short-term deposits. Investments are available to be used for current operations and are, therefore, classified as current assets even though maturities may extend beyond one year. Cash equivalents, marketable securities and short-term deposits are classified as available for sale and are, therefore, recorded at fair value on the consolidated balance sheet, with any unrealized gains and losses reported in accumulated other comprehensive income (loss), which is reflected as a separate component of stockholders’ equity in the Company’s consolidated balance sheets, until realized. The Company uses the specific identification method to compute gains and losses on the investments. The amortized cost of securities is adjusted for amortization of premiums and accretion of discounts to maturity. Such amortization and accretion is included as a component of financial income, net in the consolidated statement of operations. Cash, cash equivalents, marketable securities and short-term deposits consist of the following (in thousands): As of December 31, 2019 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Cash and cash equivalents Money market funds $ 4,789 $ — $ — $ 4,789 Total $ 4,789 $ — $ — $ 4,789 Marketable securities US Treasury securities $ 41,510 $ 23 $ (2 ) $ 41,531 Total $ 41,510 $ 23 $ (2 ) $ 41,531 Short-term deposits Term bank deposits $ 10,000 $ — $ — $ 10,000 Total $ 10,000 $ — $ — $ 10,000 As of December 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Cash and cash equivalents Money market funds $ 2,594 $ — $ — $ 2,594 Total $ 2,594 $ — $ — $ 2,594 Marketable securities US Treasury securities $ 39,776 *) $ (6 ) $ 39,770 Total $ 39,776 *) $ (6 ) $ 39,770 Short-term deposits Term bank deposits $ 70,438 $ — $ — $ 70,438 Total $ 70,438 $ — $ — $ 70,438 *) Represents an amount lower than $1. All the US Treasury securities in short-term deposits have a stated effective maturity of less than 12 months as of December 31, 2019 and 2018 . The gross unrealized gains and losses related to these short-term deposits was due primarily to changes in interest rates. The Company reviews its short-term deposits on a regular basis to evaluate whether or not any security has experienced an other than temporary decline in fair value. The Company considers factors such as length of time and extent to which the market value has been less than the cost, the financial condition and near-term prospects of the issuer and its intent to sell, or whether it is more likely than not the Company will be required to sell the investment before recovery of the investment’s amortized cost basis. If the Company believes that an other than temporary decline exists in one of these securities, the Company writes down these investments to fair value. For debt securities, the portion of the write-down related to credit loss would be recorded to other income (expense), net in the Company’s consolidated statements of operations. Any portion not related to credit loss would be recorded to accumulated other comprehensive income (loss), which is reflected as a separate component of stockholders’ equity in the Company’s consolidated balance sheets. During the year ended December 31, 2019 and 2018 , the Company did not consider any of its investments to be other-than-temporarily impaired. A short-term bank deposit is a deposit with a maturity of more than three months but less than one year. Deposits in U.S. dollars bore interest at a rate of 1.71% as of December 31, 2019 and rates ranging from 1.30% - 2.77% , per annum, as of December 31, 2018 . Short-term deposits are presented at cost which approximates market value due to their short maturities. e. Property and Equipment: Property and equipment are stated at cost, net of accumulated depreciation. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets at the following annual rates: % Computer equipment 33% Office furniture and equipment 14% — 15% Leasehold improvements Over the shorter of the expected lease f. Impairment of Long-Lived Assets: The Company’s long-lived assets are reviewed for impairment in accordance with ASC No. 360 “Property, Plant and Equipment” whenever events or changes in circumstances indicate that the carrying amount of an asset (or asset group) may not be recoverable. Recoverability of assets (or asset group) to be held and used is measured by a comparison of the carrying amount of an asset to the future undiscounted cash flows expected to be generated by the assets. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. During the years ended December 31, 2019 , 2018 and 2017 , no impairment losses have been recorded. g. Long-Term Lease Deposits: Long-term lease deposits include long-term deposits for offices. h. Revenue Recognition: The Company generates revenues in the form of software license fees and related maintenance and services fees. Subscription revenues are comprised of time-based licenses whereby customers use the Company's software with related maintenance (including support and unspecified upgrades and enhancements when and if they are available) for a specified period. Subscriptions are sold on premises with the same functionality as the perpetual license and are recognized from sales of subscription licenses to new and existing customers. When products are purchased as a subscription, the associated maintenance is included as part of the subscription revenues. Perpetual license revenues consist of the revenues recognized from sales of perpetual licenses to new and existing customers. Maintenance and services primarily consist of fees for maintenance services of perpetual license sales (including support and unspecified upgrades and enhancements when and if they are available) and to a lesser extent professional services which focus on both operationalizing the software and training the Company’s customers to fully leverage the use of its products although the user can benefit from the software without the Company's assistance. The Company sells its products worldwide directly to a network of distributors and VARs, and payment is typically due within 30 to 60 calendar days of the invoice date. The Company recognizes revenues in accordance with ASC No. 606, “Revenue from Contracts with Customers”. As such, the Company identifies a contract with a customer, identifies the performance obligations in the contract, determines the transaction price, allocates the transaction price to each performance obligation in the contract and recognizes revenues when (or as) the Company satisfies a performance obligation. Subscription software and perpetual license revenues are recognized at the point of time when the software license has been delivered and the benefit of the asset has transferred. The Company recognizes revenues from maintenance of perpetual license sales ratably over the term of the underlying maintenance contract. The term of the maintenance contract is usually one year . Renewals of maintenance contracts create new performance obligations that are satisfied over the term with the revenues recognized ratably over the period. Revenues from professional services consist mostly of time and material services. The performance obligations are satisfied, and revenues are recognized, when the services are provided or once the service term has expired. The Company enters into contracts that can include combinations of products and services, which are generally capable of being distinct and accounted for as separate performance obligations. The license is distinct upon delivery as the customer can derive the economic benefit of the software without any professional services, updates or technical support. The Company allocates the transaction price to each performance obligation based on its relative standalone selling price out of the total consideration of the contract. For maintenance, the Company determines the standalone selling prices based on the price at which the Company separately sells a renewal contract. For professional services, the Company determines the standalone selling prices based on the price at which the Company separately sells those services. For software licenses, the Company uses the residual approach to determine the standalone selling prices due to the lack of history of selling software license on a standalone basis and the highly variable sales price. Trade and other receivables are primarily comprised of trade receivables that are recorded at the invoice amount, net of an allowance for doubtful accounts. Deferred revenues represent mostly unrecognized fees billed or collected for maintenance and professional services. Deferred revenues are recognized as (or when) the Company performs under the contract. Pursuant to these contracts, customers are not invoiced for subsequent years until the annual renewal occurs. The amount of revenues recognized in the period that was included in the opening deferred revenues balance was $88,023 for the year ended December 31, 2019 . The Company does not grant a right of return to its customers, except for one of its resellers. During the years ended December 31, 2019 , 2018 and 2017 , there were no returns from this reseller. For information regarding disaggregated revenues, please refer to Note 11. i. Contract Costs: The Company pays sales commissions to sales and marketing and certain management personnel based on their attainment of certain predetermined sales goals. Sales commissions earned by its employees are considered incremental and recoverable costs of obtaining a contract with a customer. Sales commissions paid for initial contracts, which are not commensurate with sales commissions paid for renewal contracts, are capitalized and amortized over an expected period of benefit. Based on its technology, customer contracts and other factors, the Company has determined the expected period of benefit to be approximately four years . Sales commissions for renewal contracts are capitalized and then amortized on a straight line basis. Amortization expenses related to these costs are mostly included in sales and marketing expenses in the accompanying consolidated statements of operations. j. Cost of Revenues: Cost of revenues consists of the cost of maintenance and services, resulting from costs associated with support, customer success and professional services. k. Accounting for Stock-Based Compensation: The Company accounts for stock-based compensation in accordance with ASC No. 718, “Compensation-Stock Compensation.” ASC No. 718 requires companies to estimate the fair value of equity-based payment awards on the date of grant using an OPM. The value of the portion of the award that is ultimately expected to vest is recognized as an expense over the requisite service periods in the Company’s consolidated statements of operations. The Company recognizes compensation expenses for the value of its equity awards granted based on the straight-line method over the requisite service period of each of the awards. Upon adoption of ASU 2016-09, the Company elected to change its accounting policy to account for forfeitures as they occur. For the years ended December 31, 2019 , 2018 and 2017 , there were no stock options granted. The non-cash compensation expenses related to employees and consultants for the years ended December 31, 2019 , 2018 and 2017 amounted to $46,139 , $34,961 and $19,835 , respectively. l. Research and Development Costs: Research and development costs are charged to the statement of operations as incurred. ASC No. 985-20, “Software-Costs of Software to Be Sold, Leased, or Marketed,” requires capitalization of certain software development costs subsequent to the establishment of technological feasibility. Based on the Company’s product development process, technological feasibility is established upon the completion of a working model. The Company does not incur material costs between the completion of the working model and the point at which the product is ready for general release. Therefore, research and development costs are charged to the statement of operations as incurred. m. Income Taxes: The Company accounts for income taxes in accordance with ASC No. 740, using the liability method whereby deferred tax assets and liability account balances are determined based on the differences between financial reporting and the tax basis for assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. The Company provides a valuation allowance, if necessary, to reduce deferred tax assets to the amounts that are more likely-than-not to be realized. ASC 740 contains a two-step approach to recognizing and measuring a liability for uncertain tax positions. The first step is to evaluate the tax position taken or expected to be taken in a tax return by determining if the weight of available evidence indicates that it is more likely than not that, on an evaluation of the technical merits, the tax position will be sustained on audit, including resolution of any related appeals or litigation processes. The second step is to measure the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement. The Company accrues interest and penalties related to unrecognized tax provisions in its taxes on income. n. Derivative Instruments: The Company’s primary objective for holding derivative instruments is to reduce its exposure to foreign currency rate changes. The Company reduces its exposure by entering into forward foreign exchange contracts with respect to operating expenses that are forecasted to be incurred in currencies other than the U.S. dollar. A majority of the Company’s revenues and operating expenditures are transacted in U.S. dollars. However, certain operating expenditures are incurred in or exposed to other currencies, primarily the NIS. The Company has established forecasted transaction currency risk management programs to protect against fluctuations in fair value and the volatility of future cash flows caused by changes in exchange rates. The Company’s currency risk management program includes forward foreign exchange contracts designated as cash flow hedges. These forward foreign exchange contracts generally mature within 12 months. The Company does not enter into derivative financial instruments for trading purposes. In addition, the Company enters into forward contracts to hedge a portion of its monetary items in the balance sheet, such as trade receivables and payables, denominated in Pound Sterling and Euro for short term periods (the “Fair Value Hedging Program”). The purpose of the Fair Value Hedging Program is to protect the fair value of the monetary assets from foreign exchange rate fluctuations. Gains and losses from derivatives related to the Fair Value Hedging Program are not designated as hedging instruments. Derivative instruments measured at fair value and their classification on the consolidated balance sheets are presented in the following table (in thousands): Assets (liabilities) as of Liabilities as of December 31, 2019 December 31, 2018 Notional Amount Fair Value Notional Amount Fair Value Foreign exchange forward contract derivatives in cash flow hedging relationships included in accrued expenses and other short-term liabilities $ 84,968 $ (470 ) $ 75,153 $ (3,628 ) Foreign exchange forward contract derivatives for monetary items included in other current assets and accrued expenses and other short-term liabilities $ 26,995 $ 5 $ 29,162 $ (18 ) For the years ended December 31, 2019 and 2018 , the consolidated statements of operations reflect a gain of $352 and a loss of $3,741 , respectively, related to the effective portion of foreign currency forward contracts. Any ineffective portion of the cash flow hedges is recognized in financial income (expenses), net in the consolidated statement of operations. No material ineffective hedges were recognized in financial income (expenses), net for the years ended December 31, 2019 and 2018 . For the years ended December 31, 2019 and 2018 , the consolidated statements of operations reflect a gain of $683 and $98 , respectively, in financial income (expenses), net, related to the Fair Value Hedging Program. o. Concentrations of Credit Risks: Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of cash, cash equivalents, marketable securities, short-term deposits and trade receivables. The Company’s cash, cash equivalents, marketable securities and short-term deposits are invested in major banks mainly in the United States but also in Israel, France, Canada, the United Kingdom, Germany, the Netherlands, Ireland and Australia. Such deposits in the United States may be in excess of insured limits and are not insured in other jurisdictions. The Company maintains cash and cash equivalents with diverse financial institutions and monitors the amount of credit exposure to each financial institution. The Company’s trade receivables are geographically diversified and derived primarily from sales to a network of distributors and VARs mainly in the United States and Europe. Concentration of credit risk with respect to trade receivables is limited by credit limits, ongoing credit evaluation and account monitoring procedures. The Company performs ongoing credit evaluations of its channel partners and establishes an allowance for doubtful accounts based upon a specific review of all significant outstanding invoices. The Company writes off receivables when they are deemed uncollectible and having exhausted all collection efforts. p. Retirement and Severance Pay: VSI and VPS make available to its employees a retirement plan (the “U.S. Plan”) that qualifies as a deferred salary arrangement under Section 401(k) of the Code. Participants in the U.S. Plan may elect to defer a portion of their pre-tax earnings, up to the Internal Revenue Service annual contribution limit. VSI and VPS match 100% of each participant’s contributions up to a maximum of 3% of the participant’s total pay and 50% of each participant’s contributions on contributions between 3% and 5% of the participant’s total pay. Each participant may contribute up to 80% of total remuneration up to the Internal Revenue Service’s annual contribution limit. Contributions to the U.S. Plan are recorded during the year contributed as an expense in the consolidated statements of income. Pursuant to Israel’s Severance Pay Law, Israeli employees are entitled to severance pay equal to one month’s salary for each year of employment, or a portion thereof. The employees of the Israeli subsidiary elected to be included under section 14 of the Severance Pay Law, 1963 (“section 14”). According to this section, these employees are entitled only to monthly deposits, at a rate of 8.33% of their monthly salary, made in their name with insurance companies. Payments in accordance with section 14 release the Company from any future severance payments (under the above Israeli Severance Pay Law) in respect of those employees; therefore, related assets and liabilities are not presented in the balance sheet. The Company’s liability for severance pay for the employees of its French subsidiary is calculated pursuant to French law, according to which French employees are entitled to an indemnity (a statutory redundancy). The law provides for the payment of severance payment to any employee working for the French subsidiary for at least a year. VSUK makes available to certain eligible employees a pension plan whereby participants in the plan may elect to defer a portion of their earnings. VSUK matches 100% of each participant’s contributions up to a maximum of 3% of the participant’s net pay. VIRE makes available to its employees a pension plan whereby participants in the plan may elect to defer a portion of their earnings. VIRE matches 100% of each participant’s contributions up to a maximum of 3% and 50% of the participant's contributions on contributions between 3% and 5% of the participant’s net pay. VNL makes available to all its employees a pension plan whereby the Company contributes 7.7% of the participant’s net pay. Total expenses related to retirement and severance pay amounted to $6,390 , $6,765 and $4,801 for the years ended December 31, 2019 , 2018 and 2017 , respectively. The amount of severance payable included in other liabilities as of December 31, 2019 and 2018 is $2,554 and $2,391 , respectively. q. Fair Value of Financial Instruments: Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or a liability. A three tier fair value hierarchy is established as a basis for considering such assumptions and for inputs used in the valuation methodologies in measuring fair value: • Level 1: Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets. • Level 2: Observable inputs that reflect quoted prices for identical assets or liabilities in markets that are not active; quoted prices for similar assets or liabilities in active markets; inputs other than quoted prices that are observable for the assets or liabilities; or inputs that are derived principally from or corroborated by observable market data by correlation or other means. • Level 3: Unobservable inputs reflecting our own assumptions incorporated in valuation techniques used to determine fair value. These assumptions are required to be consistent with market participant assumptions that are reasonably available. The fair value hierarchy also requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The carrying amounts of cash and cash equivalents, marketable securities, trade receivables, short-term deposits and trade payables approximate their fair value due to the short-term maturity of such instruments. r. Basic and Diluted Net Loss Per Share: Basic net loss per share is computed by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share is computed by giving effect to all potential shares of common stock, including stock options, to the extent dilutive. Basic and diluted net loss per share was the same for each period presented as the inclusion of all potential shares of common stock outstanding would have been anti-dilutive. There were 3,033,718 and 3,173,188 potentially dilutive shares from the conversion of outstanding restricted stock units and stock options that were not included in the calculation of diluted net loss per share as of December 31, 2019 and 2018 , respectively. s. Contingent Liabilities: The Company accounts for its contingent liabilities in accordance with ASC No. 450 “Contingencies”. A provision is recorded when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. With respect to legal matters, provisions are reviewed and adjusted to reflect the impact of negotiations, estimated settlements, legal rulings, advice of legal counsel and other information and events pertaining to a particular matter. As of December 31, 2019 and 2018 , the Company was not a party to any litigation that could have a material adverse effect on the Company’s business, financial position, results of operations or cash flows. t. Basis of Presentation: Certain amounts in prior years' financial statements have been recast and reclassified to conform to the current year's presentation. u. Credit Facility: On March 31, 2014, the Company entered into a promissory note and related security documents with Bank Leumi USA, which the Company has extended a number of times. The Company may borrow up to $7,000 against certain of its accounts receivable outstanding amount, based on several conditions, at an annual interest rate of the Wall Street Journal Prime Rate plus 0.05% , provided that the annual interest rate applicable to advances will not be lower than 4.10% . As of December 31, 2019 , that rate amounted to 4.80% . This promissory note enables the Company, among other things, to engage in foreign currency hedging transactions with Bank Leumi USA to manage exposure to foreign currency risk without restricted cash requirements. The Company may borrow under the promissory note until November 15, 2020 at which time the principal sum of each such loan, together with accrued and unpaid interest payable, will become due and payable. As of December 31, 2019 , the Company had no balance outstanding under the promissory note. As part of the transaction, the Company granted the lender a security interest in its personal property, excluding intellectual property and other intangible assets. The promissory note also contains customary events of default v. Recently Adopted Accounting Pronouncements: In November 2016, the FASB issued ASU 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash”, which requires companies to include amounts generally described as restricted cash and restricted cash equivalents in cash and cash equivalents when reconciling beginning-of-period and end-of-period total amounts shown on the statement of cash flows. This ASU is effective for annual and interim periods beginning after December 15, 2017. The Company adopted this standard effective December 31, 2017 using the retrospective transition method, as required by the new standard. The adoption of this standard had an immaterial impact on the Company’s consolidated statements of cash flows. The following table provides a reconciliation of cash and cash equivalents, and long term restricted cash reported within the consolidated balance sheets that sum to the total of such amounts in the consolidated statements of cash flows: December 31, 2019 December 31, 2018 December 31, 2017 Cash and cash equivalents $ 68,929 $ 48,707 $ 56,689 Long term restricted cash included in other assets — — 547 Cash, cash equivalents and long term restricted cash shown in the consolidated statement of cash flows $ 68,929 $ 48,707 $ 57,236 In February 2016, the FASB issued ASU 2016-02, “Leases” ("ASC 842"), on the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e., lessees and lessors). The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight line basis over the term of the lease, respectively. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for in a manner similar to the accounting under the prior guidance (ASC 840). The new standard requires lessors to account for leases using an approach that is substantially equivalent to ASC 840 guidance for sales-type leases, direct financing leases and operating leases. The new standard supersedes the previous leases standard, ASC 840, "Leases". The Company adopted the new standard as of January 1, 2019, using the modified retrospective approach. Consequently, prior period balances and disclosures have not been restated. The Company has elected to utilize the available package of practical expedients permitted under the transition guidance within the new standard which does not require it to reassess the prior conclusions about lease identification, lease classification and initial direct costs. The adoption of ASC 842 resulted in the elimination of deferred rent of $1,313 and $4,236 in current and long-term liabilities in the Company’s consolidated balance sheets, respectively. Additionally, the Company included in its balance sheet at adoption an operating right-of-use assets, short term operating lease liabilities and long term operating lease liabilities of $ 53,274 , $2,349 and $ 55,676 , respectively. The standard did not materially impact the Company's net earnings and had no impact on cash flows. For additional information regarding the Company's accounting for leases, please refer to Note 6. In January 2018, the FASB issued Staff Q&A Topic 740, No. 5, “Accounting for Global Intangible Low Taxed Income.” Pursuant to that guidance, the Company is permitted to make an accounting policy election to either treat taxes due on future inclusions in U.S. taxable income related to GILTI as a component of current income tax expense when incurred or to fact |