Summary of Significant Accounting Policies (Policies)	12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Consolidation	The Company is incorporated in Delaware. The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All material intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates, and such differences could be material to the financial statements.
Revenue Recognition	Revenue Recognition The Company recognizes revenues in accordance with Accounting Standards Codification (“ASC”) Topic 606, Revenue from Contracts with Customers. See Note 3, Revenues, for information regarding the Company’s revenue recognition accounting policies. The Company’s revenues consist of services and software and hardware sales. In accordance with ASC Topic 606, revenues are recognized when control of services or goods are transferred to clients, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those services or goods. Services Revenues Services revenues are primarily comprised of professional services that include developing, implementing, automating and extending business processes, technology infrastructure, and software applications. The Company’s professional services span multiple industries, platforms and solutions; however, the Company has remained relatively diversified and does not believe that it has significant revenue concentration within any single industry, platform or solution. Professional services revenues are recognized over time as services are rendered. Most projects are performed on a time and materials basis, while a portion of revenues is derived from projects performed on a fixed fee or fixed fee percent complete basis. For time and material contracts, revenues are generally recognized and invoiced by multiplying the number of hours expended in the performance of the contract by the hourly rates. For fixed fee contracts, revenues are generally recognized and invoiced by multiplying the fixed rate per time period established in the contract by the number of time periods elapsed. For fixed fee percent complete contracts, revenues are generally recognized using an input method based on the ratio of hours expended to total estimated hours, and the client is invoiced according to the agreed-upon schedule detailing the amount and timing of payments in the contract. Clients are typically billed monthly for services provided during that month, but can be billed on a more or less frequent basis as determined by the contract. If the time is worked and approved at the end of a fiscal period and the invoice has not yet been sent to the client, the amount is recorded as revenue once the Company verifies all other revenue recognition criteria have been met, and the amount is classified as a receivable as the right to consideration is unconditional at that point. Amounts invoiced in excess of revenues recognized are contract liabilities, which are classified as deferred revenues in the Consolidated Balance Sheet. The term between invoicing and payment due date is not significant. Contracts for professional services provide for a general right, to the client or the Company, to cancel or terminate the contract within a given period of time (generally 10 to 30 days’ notice is required). The client is responsible for any time and expenses incurred up to the date of cancellation or termination of the contract. Certain contracts may include volume discounts or holdbacks, which are accounted for as variable consideration, but are not typically significant. The Company estimates variable consideration based on historical experience and forecasted sales and includes the variable consideration in the transaction price. Other services revenues are comprised of hosting fees, partner referral fees, maintenance agreements, training and internally developed software-as-a-service (“SaaS”) sales. Revenues from hosting fees, maintenance agreements, training and internally developed SaaS sales are generally recognized over time using a time-based measure of progress as services are rendered. Partner referral fees are recorded at a point in time upon meeting specified requirements to earn the respective fee. On many professional service projects, the Company is also reimbursed for out-of-pocket expenses including travel and other project-related expenses. These reimbursements are included as a component of the transaction price of the respective professional services contract and are invoiced as the expenses are incurred. The Company structures its professional services arrangements to recover the cost of reimbursable expenses without a markup. Software and Hardware Revenues Software and hardware revenues are comprised of third-party software and hardware resales, in which the Company is considered the agent, and sales of internally developed software, in which the Company is considered the principal. Third-party software and hardware revenues are recognized and invoiced when the Company fulfills its obligation to arrange the sale, which occurs when the purchase order with the vendor is executed and the customer has access to the software or the hardware has been shipped to the customer. Internally developed software revenues are recognized and invoiced when control is transferred to the customer, which occurs when the software has been made available to the customer and the license term has commenced. Revenues from third-party software and hardware sales are recorded on a net basis, while revenues from internally developed software sales are recorded on a gross basis. There are no significant cancellation or termination-type provisions for the Company’s software and hardware sales, and the term between invoicing and payment due date is not significant. Revenues are presented net of taxes assessed by governmental authorities. Sales taxes are generally collected and subsequently remitted on all software and hardware sales and certain services transactions as appropriate. Arrangements with Multiple Performance Obligations Arrangements with clients may contain multiple promises such as delivery of software, hardware, professional services or post-contract support services. These promises are accounted for as separate performance obligations if they are distinct. For arrangements with clients that contain multiple performance obligations, the transaction price is allocated to the separate performance obligations based on estimated relative standalone selling price, which is estimated by the expected cost plus a margin approach, taking into consideration market conditions and competitive factors. Because contracts that contain multiple performance obligations are typically short term due to the contract cancellation provisions, the allocation of the transaction price to the separate performance obligations is not considered a significant estimate. Contract Costs In accordance with the terms of the Company’s sales commission plan, commissions are not earned until the related revenue is recognized. Therefore, sales commissions are expensed as they are earned. Certain sales incentives are accrued based on achievement of specified bookings goals. For these incentives, the Company applies the practical expedient that allows the Company to expense the incentives as incurred, since the amortization period would have been one year or less.
Allowance for Doubtful Accounts	Allowance for Credit Losses As of January 1, 2020, the Company estimates its allowance for credit losses in accordance with ASC Topic 326, Financial Instruments - Credit Losses. See Note 8, Allowance for Credit Losses, for information regarding the Company’s accounting policies related to the allowance for credit losses.
Income Taxes	Income Taxes The Company accounts for income taxes in accordance with ASC Subtopic 740-10, Income Taxes (“ASC Subtopic 740-10”), and ASC Section 740-10-25, Income Taxes – Recognition (“ASC Section 740-10-25”). ASC Subtopic 740-10 prescribes the use of the asset and liability method whereby deferred tax asset and liability account balances are determined based on differences between financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. Deferred tax assets are subject to tests of recoverability. A valuation allowance is provided for such deferred tax assets to the extent realization is not judged to be more likely than not. ASC Section 740-10-25 prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. ASC Section 740-10-25 also provides guidance on derecognition, classification, treatment of interest and penalties, and disclosure of such positions.
Stock-Based Compensation	Stock-Based Compensation Stock-based compensation is accounted for in accordance with ASC Topic 718, Compensation – Stock Compensation. Under this guidance, the Company recognizes share-based compensation ratably using the straight-line attribution method over the requisite service period, which is generally three years. The fair value of restricted stock awards is based on the value of the Company’s common stock on the date of the grant.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents consist of all cash balances and liquid investments with original maturities of three months or less.
Property and Equipment	Property and Equipment Property and equipment are recorded at cost. Depreciation of property and equipment is computed using the straight-line method over the useful lives of the assets (generally one to seven years). Leasehold improvements are amortized over the shorter of the life of the lease or the estimated useful life of the assets.
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill represents the excess purchase price over the fair value of net assets acquired, or net liabilities assumed, in a business combination. In accordance with ASC Topic 350, Intangibles – Goodwill and Other (“ASC Topic 350”), the Company performs an annual impairment review in the fourth quarter and more frequently if events or changes in circumstances indicate that goodwill might be impaired. The Company has one reporting unit for purposes of the goodwill impairment review. ASC Topic 350 permits an assessment of qualitative factors to determine whether it is more likely than not that the fair value is less than the carrying amount of the Company before applying the quantitative goodwill impairment test. If it is more likely than not that the fair value is less than the carrying amount of the Company, the quantitative goodwill impairment test will be conducted to detect and measure any impairment. Based upon the Company’ s qualitative assessment, it is more likely than not that the fair value of the Company is greater than its carrying amount. No impairment charges were recorded for 2020, 2019 or 2018. Other intangible assets include customer relationships, non-compete arrangements, trade names, customer backlog, and developed software, which are being amortized over the assets’ estimated useful lives using the straight-line method. Estimated useful lives range from one year to 10 years. Amortization of customer relationships, non-compete arrangements, trade names, customer backlog, and developed software is considered an operating expense and is included in “Amortization” in the accompanying Consolidated Statements of Operations. The Company periodically reviews the estimated useful lives of its identifiable intangible assets, taking into consideration any events or circumstances that might result in a lack of recoverability or revised useful life. Other intangible assets are evaluated for impairment upon the occurrence of events or changes in circumstances indicating that the carrying amount of an asset may not be recoverable. No impairment of intangible assets was recorded for 2020, 2019 or 2018.
Purchase Accounting and Related Fair Value Measurements	Purchase Accounting and Related Fair Value Measurements The Company allocates the purchase price, including contingent consideration, of its acquisitions to the assets and liabilities acquired, including identifiable intangible assets, based on their respective fair values at the date of acquisition. Such fair market value assessments are primarily based on third-party valuations using assumptions developed by management that require significant judgments and estimates that can change materially as additional information becomes available. The purchase price allocated to intangibles is based on unobservable factors, including but not limited to, projected revenues, expenses, customer attrition rates, royalty rates, a weighted average cost of capital, among others. The weighted average cost of capital uses a market participant’s cost of equity and after-tax cost of debt and reflects the risks inherent in the cash flows. The approach to valuing the initial contingent consideration associated with the purchase price also uses similar unobservable factors such as projected revenues and expenses over the term of the contingent earn-out period, discounted for the period over which the initial contingent consideration is measured, and volatility rates. Based upon these assumptions, the contingent consideration is then valued using a Monte Carlo simulation. The Company finalizes the purchase price allocation once certain initial accounting valuation estimates are finalized, and no later than 12 months following the acquisition date.
Financial Instruments	Financial Instruments Cash equivalents, accounts receivable, accounts payable, and other accrued liabilities are stated at amounts which approximate fair value due to the near term maturities of these instruments. The Company’s long-term debt balance related to its 2.375% Convertible Senior Notes Due 2023 (“2023 Notes”) and 1.250% Convertible Senior Notes Due 2025 (“2025 Notes”) are carried at their principal amount less unamortized debt discount and issuance costs, and are not carried at fair value at each period end. See Note 12, Long-Term Debt, for information regarding the Company’s convertible debt accounting policies. The Company, when deemed appropriate, uses derivatives as a risk management tool to mitigate the potential impact of foreign currency exchange rate risk. Both the gain or loss on derivatives not designated as hedging instruments and the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in current earnings. All derivatives are carried at fair value in the consolidated balance sheets. See Note 14, Derivatives, for additional information regarding the Company’s derivative financial instruments.
Treasury Stock	Treasury Stock The Company uses the cost method to account for repurchases of its own stock.
Segment and Geographic Information	Segment and Geographic Information The Company operates as one reportable operating segment according to ASC Topic 280, Segment Reporting, which establishes standards for the way that business enterprises report information about operating segments. The chief operating decision maker formulates decisions about how to allocate resources and assess performance based on consolidated financial results. During each of the years ended December 31, 2020, 2019 and 2018, approximately 98% of the Company’s revenues were derived from clients in the United States. For the years ended December 31, 2020 and 2019, 20% and 4%, respectively, of the Company’s non-current assets were located outside the United States, the majority of which were comprised of goodwill and other intangible assets from acquisitions outside of the United States.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (ASC Topic 606), which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The Company adopted the standard on January 1, 2018 using the modified retrospective method which requires a cumulative-effect adjustment to the opening balance of retained earnings within stockholders’ equity. The impact of adoption was immaterial as of January 1, 2018, and therefore, did not result in a cumulative-effect adjustment to the opening balance of retained earnings. In February 2016, the FASB issued ASU No. 2016-02, Leases, which supersedes ASC Topic 840, Leases, and creates a new topic, ASC Topic 842, Leases. During the year end December 31, 2018, the FASB issued ASU 2018-10, Codification Improvements to Topic 842, Leases, ASU 2018-11, Leases – Targeted Improvement, and ASU 2018-20, Leases (Topic 842): Narrow Scope Improvements for Lessors which further amended ASU No. 2016-02. These updates require lessees to recognize lease liabilities and right of use (“ROU”) assets for all leases, including operating leases, with a term greater than 12 months on its balance sheet. The Company adopted ASC Topic 842 as of January 1, 2019 using the modified retrospective transition method provided by ASU No. 2018-11. The Company elected the package of practical expedients granted by ASU No. 2016-2 and did not reassess whether existing contracts contained a lease, the classification of existing leases, and unamortized indirect costs as of January 1, 2019. The Company also elected the practical expedient related to the combination of lease and non-lease components and included fixed payments related to common area maintenance expense for the Company’s office leases in the measurement of the Company’s ROU assets and lease liabilities. There was no impact on net income, cash flows or net assets as a result of adoption. Refer to Note 16, Leases, for additional disclosures resulting from the adoption of ASU No. 2016-02 and its amendments. In June 2016, the FASB issued ASU No. 2016-13, which amended the guidance of ASC Topic 326, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU No. 2016-13 requires the immediate recognition of estimated credit losses expected to occur over the remaining life of many financial assets, including trade receivables. The Company adopted this ASU on January 1, 2020 using a modified retrospective approach, which allows the impact of adoption to be recorded through a cumulative effect adjustment to retained earnings without restating comparative periods. The cumulative effect adjustment for adoption of ASU No. 2016-13 resulted in a decrease of $0.4 million in Accounts receivable, net, and a decrease of $0.3 million in Retained earnings, net of tax, as of January 1, 2020. Refer to Note 8, Allowance for Credit Losses, for additional disclosures resulting from the adoption of ASU No. 2016-13. In August 2020, the FASB issued ASU No. 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (Subtopic 815-40), which simplifies the accounting for convertible instruments. The guidance removes certain accounting models which separate the embedded conversion features from the host contract for convertible instruments, requiring bifurcation only if the convertible debt feature qualifies as a derivative or for convertible debt issued at a substantial premium. The ASU removes certain settlement conditions required for equity contracts to qualify for the derivative scope exception, permitting more contracts to qualify for the exception. In addition, the guidance eliminates the treasury stock method to calculate diluted earnings per share for convertible instruments and requires the use of the if-converted method. The ASU is effective for annual reporting periods beginning after December 15, 2021, including interim reporting periods within those annual periods, with early adoption permitted no earlier than the fiscal year beginning after December 15, 2020. The ASU allows entities to use a modified or full retrospective transition method. Under the modified approach, entities will apply the guidance to all financial instruments that are outstanding as of the beginning of the year of adoption with the cumulative effect recognized as an adjustment to the opening balance of retained earnings. Under the full retrospective method, entities will apply the guidance to all outstanding financial instruments for each prior reporting period presented. The Company will adopt this ASU on January 1, 2022 and is currently evaluating the method of adoption and the related impact of the new guidance on earnings per share and on its financial statements.
Earnings Per Share	Basic earnings per share is computed by dividing net income available to common stockholders by the weighted-average number of common shares outstanding during the period. Diluted earnings per share includes the weighted average number of common shares outstanding and the number of equivalent shares which would be issued related to unvested restricted stock, convertible senior notes, warrants, and acquisition consideration using the treasury method, unless such additional equivalent shares are anti-dilutive.
Derivatives	Derivatives Not Designated as Hedging Instruments Both the gain or loss on the derivatives not designated as hedging instruments and the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in current earnings. Realized gains or losses and changes in the estimated fair value of foreign currency forward contracts that have not been designated as hedges were a net gain of $0.7 million during the year ended December 31, 2020, and were immaterial during each of the years ended December 31, 2019 and 2018. Gains and losses on these contracts are recorded in net other expense (income) and net interest expense in the Consolidated Statements of Operations and are offset by losses and gains on the related hedged items.
Fair Value Measurement	The fair value hierarchy is based on inputs to valuation techniques that are used to measure fair value that are either observable or unobservable. Observable inputs reflect assumptions market participants would use in pricing an asset or liability based on market data obtained from independent sources while unobservable inputs reflect a reporting entity’s pricing based upon its own market assumptions. The fair value hierarchy consists of the following three levels: •Level 1 – Inputs are quoted prices in active markets for identical assets or liabilities. •Level 2 – Inputs are quoted prices for similar assets or liabilities in an active market, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable and market-corroborated inputs which are derived principally from or corroborated by observable market data. •Level 3 – Inputs are derived from valuation techniques in which one or more significant inputs or value drivers are unobservable. The carrying value of cash and cash equivalents, accounts receivable, accounts payable, current liabilities and the revolving line of credit approximate fair value because of the short maturity of these instruments. All highly liquid investments with maturities at date of purchase of three months or less are considered to be cash equivalents. Based on their short-term nature, the carrying value of cash equivalents approximate their fair value. As of December 31, 2020, $66.0 million of the Company’s cash and cash equivalents balance related to money-market fund investments. As of December 31, 2019, $64.2 million of the Company’s cash and cash equivalents balance related to money-market fund investments and $3.0 million related to fixed time deposits. These short-term money-market funds and fixed time deposits are considered Level 1 investments. The Company has a deferred compensation plan, which is funded through COLI policies. The COLI asset is carried at fair value derived from quoted market prices of investments within the COLI policies, which are considered Level 2 inputs. Refer to Note 11, Employee Benefit Plans, for the fair value of the COLI asset as of December 31, 2020 and 2019. The Company estimates the fair value of each foreign exchange forward contract by using the present value of expected cash flows. The estimate takes into account the difference between the current market forward price and contracted forward price for each foreign exchange contract and applies the difference in the rates to each outstanding contract. Valuations for all derivatives fall within Level 2 of the GAAP valuation hierarchy. The fair value of the Company’s derivative instruments outstanding as of December 31, 2020 and 2019 was immaterial. The Company has contingent consideration liabilities related to acquisitions which are measured on a recurring basis and recorded at fair value, determined using the discounted cash flow method. The inputs used to calculate the fair value of the contingent consideration liabilities are considered to be Level 3 inputs due to the lack of relevant market activity and significant management judgment. Key unobservable inputs include revenue growth rates, which ranged from 5% to 15%, and volatility rates, which ranged from 4% to 5% for revenue and 19% to 37% for earnings. An increase in future cash flows may result in a higher estimated fair value while a decrease in future cash flows may result in a lower estimated fair value of the contingent consideration liabilities. Remeasurements to fair value are recorded in adjustment to fair value of contingent consideration in the Consolidated Statements of Operations. Refer to Note 7, Balance Sheet Components, for the estimated fair value of the contingent consideration liabilities as of December 31, 2020 and 2019. The fair value of the Notes is measured using quoted price inputs. The Notes are not actively traded, and thus the price inputs represent a Level 2 measurement. As the quoted price inputs are highly variable from day to day, the fair value estimates could significantly increase or decrease. The Notes are carried at their principal amount less unamortized debt discount and issuance costs, and are not carried at fair value at each period end. The original debt discount was calculated at a market interest rate for nonconvertible debt at the time of issuance, which represented a Level 3 fair value measurement based on inputs that ranged from 5% to 8%. The approximate fair value of the 2025 Notes as of December 31, 2020 was $263.4 million, and the approximate fair value of the 2023 Notes as December 31, 2020 and 2019 was $7.1 million and $195.4 million, respectively. The fair values were estimated on the basis of inputs that are observable in the market and are considered a Level 2 fair value measurement.
Leases	The Company leases office space under various operating lease agreements, which have remaining lease terms of less than one year to eight years. Prior to January 1, 2019, the Company accounted for leases under ASC Topic 840. On January 1, 2019, the Company adopted ASC Topic 842, which replaced ASC Topic 840. The most significant impact upon adoption was the recognition of lease liabilities and ROU assets for all operating leases with a term greater than 12 months on its balance sheet. Refer to Note 2, Summary of Significant Accounting Policies, for additional information on the impact of adoption. The following discussion relates to the Company’s lease accounting policy, effective January 1, 2019, under ASC Topic 842 for the years ended December 31, 2020 and 2019. The Company determines if an arrangement is a lease at inception. Operating leases are included in operating lease ROU assets, other current liabilities, and operating lease liabilities on the consolidated balance sheet. Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. The lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. In determining the expected lease term, the majority of the Company’s renewal options are not reasonably certain based on conditions of the Company’s existing leases and its overall business strategies. The Company will periodically reassess expected lease terms based on significant triggering events or compelling economic reasons to exercise renewal options. The Company utilizes its incremental borrowing rate based on the information available at commencement date in determining the present value of future payments. Operating lease expense for minimum lease payments is recognized on a straight-line basis over the lease term. The Company accounts for lease and non-lease components as a single lease component.
Commitments and Contingencies	From time to time the Company is involved in legal proceedings, claims and litigation related to employee claims, contractual disputes and taxes in the ordinary course of business. Although the Company cannot predict the outcome of such matters, currently the Company has no reason to believe the disposition of any current matter could reasonably be expected to have a material adverse impact on the Company’s financial position, results of operations or the ability to carry on any of its business activities.

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Line Items]

The Company is incorporated in Delaware. The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All material intercompany accounts and transactions have been eliminated in consolidation.

Use of Estimates

The preparation of financial statements in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates, and such differences could be material to the financial statements.

Revenue Recognition

The Company recognizes revenues in accordance with Accounting Standards Codification (“ASC”) Topic 606, Revenue from Contracts with Customers. See Note 3, Revenues, for information regarding the Company’s revenue recognition accounting policies.

The Company’s revenues consist of services and software and hardware sales. In accordance with ASC Topic 606, revenues are recognized when control of services or goods are transferred to clients, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those services or goods.

Services Revenues

Services revenues are primarily comprised of professional services that include developing, implementing, automating and extending business processes, technology infrastructure, and software applications. The Company’s professional services span multiple industries, platforms and solutions; however, the Company has remained relatively diversified and does not believe that it has significant revenue concentration within any single industry, platform or solution.

Professional services revenues are recognized over time as services are rendered. Most projects are performed on a time and materials basis, while a portion of revenues is derived from projects performed on a fixed fee or fixed fee percent complete basis. For time and material contracts, revenues are generally recognized and invoiced by multiplying the number of hours expended in the performance of the contract by the hourly rates. For fixed fee contracts, revenues are generally recognized and invoiced by multiplying the fixed rate per time period established in the contract by the number of time periods elapsed. For fixed fee percent complete contracts, revenues are generally recognized using an input method based on the ratio of hours expended to total estimated hours, and the client is invoiced according to the agreed-upon schedule detailing the amount and timing of payments in the contract.

Clients are typically billed monthly for services provided during that month, but can be billed on a more or less frequent basis as determined by the contract. If the time is worked and approved at the end of a fiscal period and the invoice has not yet been sent to the client, the amount is recorded as revenue once the Company verifies all other revenue recognition criteria have been met, and the amount is classified as a receivable as the right to consideration is unconditional at that point. Amounts invoiced in excess of revenues recognized are contract liabilities, which are classified as deferred revenues in the Consolidated Balance Sheet. The term between invoicing and payment due date is not significant. Contracts for professional services provide for a general right, to the client or the Company, to cancel or terminate the contract within a given period of time (generally 10 to 30 days’ notice is required). The client is responsible for any time and expenses incurred up to the date of cancellation or termination of the contract. Certain contracts may include volume discounts or holdbacks, which are accounted for as variable consideration, but are not typically significant. The Company estimates variable consideration based on historical experience and forecasted sales and includes the variable consideration in the transaction price.

Other services revenues are comprised of hosting fees, partner referral fees, maintenance agreements, training and internally developed software-as-a-service (“SaaS”) sales. Revenues from hosting fees, maintenance agreements, training and internally developed SaaS sales are generally recognized over time using a time-based measure of progress as services are rendered. Partner referral fees are recorded at a point in time upon meeting specified requirements to earn the respective fee.

On many professional service projects, the Company is also reimbursed for out-of-pocket expenses including travel and other project-related expenses. These reimbursements are included as a component of the transaction price of the respective professional services contract and are invoiced as the expenses are incurred. The Company structures its professional services arrangements to recover the cost of reimbursable expenses without a markup.

Software and Hardware Revenues

Software and hardware revenues are comprised of third-party software and hardware resales, in which the Company is considered the agent, and sales of internally developed software, in which the Company is considered the principal. Third-party software and hardware revenues are recognized and invoiced when the Company fulfills its obligation to arrange the sale, which occurs when the purchase order with the vendor is executed and the customer has access to the software or the hardware has been shipped to the customer. Internally developed software revenues are recognized and invoiced when control is transferred to the customer, which occurs when the software has been made available to the customer and the license term has commenced. Revenues from third-party software and hardware sales are recorded on a net basis, while revenues from internally developed software sales are recorded on a gross basis. There are no significant cancellation or termination-type provisions for the Company’s software and hardware sales, and the term between invoicing and payment due date is not significant.

Revenues are presented net of taxes assessed by governmental authorities. Sales taxes are generally collected and subsequently remitted on all software and hardware sales and certain services transactions as appropriate.

Arrangements with Multiple Performance Obligations

Arrangements with clients may contain multiple promises such as delivery of software, hardware, professional services or post-contract support services. These promises are accounted for as separate performance obligations if they are distinct. For arrangements with clients that contain multiple performance obligations, the transaction price is allocated to the separate performance obligations based on estimated relative standalone selling price, which is estimated by the expected cost plus a margin approach, taking into consideration market conditions and competitive factors. Because contracts that contain multiple performance obligations are typically short term due to the contract cancellation provisions, the allocation of the transaction price to the separate performance obligations is not considered a significant estimate.

Contract Costs

In accordance with the terms of the Company’s sales commission plan, commissions are not earned until the related revenue is recognized. Therefore, sales commissions are expensed as they are earned. Certain sales incentives are accrued based on achievement of specified bookings goals. For these incentives, the Company applies the practical expedient that allows the Company to expense the incentives as incurred, since the amortization period would have been one year or less.

Allowance for Doubtful Accounts

Allowance for Credit Losses

As of January 1, 2020, the Company estimates its allowance for credit losses in accordance with ASC Topic 326, Financial Instruments - Credit Losses. See Note 8, Allowance for Credit Losses, for information regarding the Company’s accounting policies related to the allowance for credit losses.

Income Taxes

The Company accounts for income taxes in accordance with ASC Subtopic 740-10, Income Taxes (“ASC Subtopic 740-10”), and ASC Section 740-10-25, Income Taxes – Recognition (“ASC Section 740-10-25”). ASC Subtopic 740-10 prescribes the use of the asset and liability method whereby deferred tax asset and liability account balances are determined based on differences between financial reporting and tax bases of assets and liabilities and are measured using the enacted tax

rates and laws that will be in effect when the differences are expected to reverse. Deferred tax assets are subject to tests of recoverability. A valuation allowance is provided for such deferred tax assets to the extent realization is not judged to be more likely than not. ASC Section 740-10-25 prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. ASC Section 740-10-25 also provides guidance on derecognition, classification, treatment of interest and penalties, and disclosure of such positions.

Stock-Based Compensation

Stock-based compensation is accounted for in accordance with ASC Topic 718, Compensation – Stock Compensation. Under this guidance, the Company recognizes share-based compensation ratably using the straight-line attribution method over the requisite service period, which is generally three years. The fair value of restricted stock awards is based on the value of the Company’s common stock on the date of the grant.

Cash and Cash Equivalents

Cash and cash equivalents consist of all cash balances and liquid investments with original maturities of three months or less.

Property and Equipment

Property and equipment are recorded at cost. Depreciation of property and equipment is computed using the straight-line method over the useful lives of the assets (generally one to seven years). Leasehold improvements are amortized over the shorter of the life of the lease or the estimated useful life of the assets.

Goodwill and Intangible Assets

Goodwill represents the excess purchase price over the fair value of net assets acquired, or net liabilities assumed, in a business combination. In accordance with ASC Topic 350, Intangibles – Goodwill and Other (“ASC Topic 350”), the Company performs an annual impairment review in the fourth quarter and more frequently if events or changes in circumstances indicate that goodwill might be impaired. The Company has one reporting unit for purposes of the goodwill impairment review. ASC Topic 350 permits an assessment of qualitative factors to determine whether it is more likely than not that the fair value is less than the carrying amount of the Company before applying the quantitative goodwill impairment test. If it is more likely than not that the fair value is less than the carrying amount of the Company, the quantitative goodwill impairment test will be conducted to detect and measure any impairment. Based upon the Company’ s qualitative assessment, it is more likely than not that the fair value of the Company is greater than its carrying amount. No impairment charges were recorded for 2020, 2019 or 2018.

Other intangible assets include customer relationships, non-compete arrangements, trade names, customer backlog, and developed software, which are being amortized over the assets’ estimated useful lives using the straight-line method. Estimated useful lives range from one year to 10 years. Amortization of customer relationships, non-compete arrangements, trade names, customer backlog, and developed software is considered an operating expense and is included in “Amortization” in the accompanying Consolidated Statements of Operations. The Company periodically reviews the estimated useful lives of its identifiable intangible assets, taking into consideration any events or circumstances that might result in a lack of recoverability or revised useful life. Other intangible assets are evaluated for impairment upon the occurrence of events or changes in circumstances indicating that the carrying amount of an asset may not be recoverable. No impairment of intangible assets was recorded for 2020, 2019 or 2018.

Purchase Accounting and Related Fair Value Measurements

The Company allocates the purchase price, including contingent consideration, of its acquisitions to the assets and liabilities acquired, including identifiable intangible assets, based on their respective fair values at the date of acquisition. Such fair market value assessments are primarily based on third-party valuations using assumptions developed by management that require significant judgments and estimates that can change materially as additional information becomes available. The purchase price allocated to intangibles is based on unobservable factors, including but not limited to, projected revenues, expenses, customer attrition rates, royalty rates, a weighted average cost of capital, among others. The weighted average cost of capital uses a market participant’s cost of equity and after-tax cost of debt and reflects the risks inherent in the cash flows. The approach to valuing the initial contingent consideration associated with the purchase price also uses similar unobservable factors such as projected revenues and expenses over the term of the contingent earn-out period, discounted for the period over which the initial contingent consideration is measured, and volatility rates. Based upon these assumptions, the contingent consideration is then valued using a Monte Carlo simulation. The Company finalizes the purchase price allocation once certain initial accounting valuation estimates are finalized, and no later than 12 months following the acquisition date.

Financial Instruments

Cash equivalents, accounts receivable, accounts payable, and other accrued liabilities are stated at amounts which approximate fair value due to the near term maturities of these instruments. The Company’s long-term debt balance related to its 2.375% Convertible Senior Notes Due 2023 (“2023 Notes”) and 1.250% Convertible Senior Notes Due 2025 (“2025 Notes”)

are carried at their principal amount less unamortized debt discount and issuance costs, and are not carried at fair value at each period end. See Note 12, Long-Term Debt, for information regarding the Company’s convertible debt accounting policies.

The Company, when deemed appropriate, uses derivatives as a risk management tool to mitigate the potential impact of foreign currency exchange rate risk. Both the gain or loss on derivatives not designated as hedging instruments and the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in current earnings. All derivatives are carried at fair value in the consolidated balance sheets. See Note 14, Derivatives, for additional information regarding the Company’s derivative financial instruments.

Treasury Stock

The Company uses the cost method to account for repurchases of its own stock.

Segment and Geographic Information

The Company operates as one reportable operating segment according to ASC Topic 280, Segment Reporting, which establishes standards for the way that business enterprises report information about operating segments. The chief operating decision maker formulates decisions about how to allocate resources and assess performance based on consolidated financial results. During each of the years ended December 31, 2020, 2019 and 2018, approximately 98% of the Company’s revenues were derived from clients in the United States. For the years ended December 31, 2020 and 2019, 20% and 4%, respectively, of the Company’s non-current assets were located outside the United States, the majority of which were comprised of goodwill and other intangible assets from acquisitions outside of the United States.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (ASC Topic 606), which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The Company adopted the standard on January 1, 2018 using the modified retrospective method which requires a cumulative-effect adjustment to the opening balance of retained earnings within stockholders’ equity. The impact of adoption was immaterial as of January 1, 2018, and therefore, did not result in a cumulative-effect adjustment to the opening balance of retained earnings.

In February 2016, the FASB issued ASU No. 2016-02, Leases, which supersedes ASC Topic 840, Leases, and creates a new topic, ASC Topic 842, Leases. During the year end December 31, 2018, the FASB issued ASU 2018-10, Codification Improvements to Topic 842, Leases, ASU 2018-11, Leases – Targeted Improvement, and ASU 2018-20, Leases (Topic 842): Narrow Scope Improvements for Lessors which further amended ASU No. 2016-02. These updates require lessees to recognize lease liabilities and right of use (“ROU”) assets for all leases, including operating leases, with a term greater than 12 months on its balance sheet. The Company adopted ASC Topic 842 as of January 1, 2019 using the modified retrospective transition method provided by ASU No. 2018-11. The Company elected the package of practical expedients granted by ASU No. 2016-2 and did not reassess whether existing contracts contained a lease, the classification of existing leases, and unamortized indirect costs as of January 1, 2019. The Company also elected the practical expedient related to the combination of lease and non-lease components and included fixed payments related to common area maintenance expense for the Company’s office leases in the measurement of the Company’s ROU assets and lease liabilities. There was no impact on net income, cash flows or net assets as a result of adoption. Refer to Note 16, Leases, for additional disclosures resulting from the adoption of ASU No. 2016-02 and its amendments.

In June 2016, the FASB issued ASU No. 2016-13, which amended the guidance of ASC Topic 326, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU No. 2016-13 requires the immediate recognition of estimated credit losses expected to occur over the remaining life of many financial assets, including trade receivables. The Company adopted this ASU on January 1, 2020 using a modified retrospective approach, which allows the impact of adoption to be recorded through a cumulative effect adjustment to retained earnings without restating comparative periods. The cumulative effect adjustment for adoption of ASU No. 2016-13 resulted in a decrease of $0.4 million in Accounts receivable, net, and a decrease of $0.3 million in Retained earnings, net of tax, as of January 1, 2020. Refer to Note 8, Allowance for Credit Losses, for additional disclosures resulting from the adoption of ASU No. 2016-13.

In August 2020, the FASB issued ASU No. 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (Subtopic 815-40), which simplifies the accounting for convertible instruments. The guidance removes certain accounting models which separate the embedded conversion features from the host contract for convertible instruments, requiring bifurcation only if the convertible debt feature qualifies as a

derivative or for convertible debt issued at a substantial premium. The ASU removes certain settlement conditions required for equity contracts to qualify for the derivative scope exception, permitting more contracts to qualify for the exception. In addition, the guidance eliminates the treasury stock method to calculate diluted earnings per share for convertible instruments and requires the use of the if-converted method. The ASU is effective for annual reporting periods beginning after December 15, 2021, including interim reporting periods within those annual periods, with early adoption permitted no earlier than the fiscal year beginning after December 15, 2020. The ASU allows entities to use a modified or full retrospective transition method. Under the modified approach, entities will apply the guidance to all financial instruments that are outstanding as of the beginning of the year of adoption with the cumulative effect recognized as an adjustment to the opening balance of retained earnings. Under the full retrospective method, entities will apply the guidance to all outstanding financial instruments for each prior reporting period presented. The Company will adopt this ASU on January 1, 2022 and is currently evaluating the method of adoption and the related impact of the new guidance on earnings per share and on its financial statements.

Earnings Per Share

Basic earnings per share is computed by dividing net income available to common stockholders by the weighted-average number of common shares outstanding during the period. Diluted earnings per share includes the weighted average number of common shares outstanding and the number of equivalent shares which would be issued related to unvested restricted stock, convertible senior notes, warrants, and acquisition consideration using the treasury method, unless such additional equivalent shares are anti-dilutive.

Derivatives

Derivatives Not Designated as Hedging Instruments

Both the gain or loss on the derivatives not designated as hedging instruments and the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in current earnings. Realized gains or losses and changes in the estimated fair value of foreign currency forward contracts that have not been designated as hedges were a net gain of $0.7 million during the year ended December 31, 2020, and were immaterial during each of the years ended December 31, 2019 and 2018. Gains and losses on these contracts are recorded in net other expense (income) and net interest expense in the Consolidated Statements of Operations and are offset by losses and gains on the related hedged items.

Fair Value Measurement

The fair value hierarchy is based on inputs to valuation techniques that are used to measure fair value that are either observable or unobservable. Observable inputs reflect assumptions market participants would use in pricing an asset or liability based on market data obtained from independent sources while unobservable inputs reflect a reporting entity’s pricing based upon its own market assumptions.

The fair value hierarchy consists of the following three levels:

•Level 1 – Inputs are quoted prices in active markets for identical assets or liabilities.

•Level 2 – Inputs are quoted prices for similar assets or liabilities in an active market, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable and market-corroborated inputs which are derived principally from or corroborated by observable market data.

•Level 3 – Inputs are derived from valuation techniques in which one or more significant inputs or value drivers are unobservable.

The carrying value of cash and cash equivalents, accounts receivable, accounts payable, current liabilities and the revolving line of credit approximate fair value because of the short maturity of these instruments.

All highly liquid investments with maturities at date of purchase of three months or less are considered to be cash equivalents. Based on their short-term nature, the carrying value of cash equivalents approximate their fair value. As of December 31, 2020, $66.0 million of the Company’s cash and cash equivalents balance related to money-market fund investments. As of December 31, 2019, $64.2 million of the Company’s cash and cash equivalents balance related to money-market fund investments and $3.0 million related to fixed time deposits. These short-term money-market funds and fixed time deposits are considered Level 1 investments.

The Company has a deferred compensation plan, which is funded through COLI policies. The COLI asset is carried at fair value derived from quoted market prices of investments within the COLI policies, which are considered Level 2 inputs. Refer to Note 11, Employee Benefit Plans, for the fair value of the COLI asset as of December 31, 2020 and 2019.

The Company estimates the fair value of each foreign exchange forward contract by using the present value of expected cash flows. The estimate takes into account the difference between the current market forward price and contracted forward price for each foreign exchange contract and applies the difference in the rates to each outstanding contract. Valuations for all derivatives fall within Level 2 of the GAAP valuation hierarchy. The fair value of the Company’s derivative instruments outstanding as of December 31, 2020 and 2019 was immaterial.

The Company has contingent consideration liabilities related to acquisitions which are measured on a recurring basis and recorded at fair value, determined using the discounted cash flow method. The inputs used to calculate the fair value of the contingent consideration liabilities are considered to be Level 3 inputs due to the lack of relevant market activity and significant management judgment. Key unobservable inputs include revenue growth rates, which ranged from 5% to 15%, and volatility rates, which ranged from 4% to 5% for revenue and 19% to 37% for earnings. An increase in future cash flows may result in a higher estimated fair value while a decrease in future cash flows may result in a lower estimated fair value of the contingent consideration liabilities. Remeasurements to fair value are recorded in adjustment to fair value of contingent consideration in the Consolidated Statements of Operations. Refer to Note 7, Balance Sheet Components, for the estimated fair value of the contingent consideration liabilities as of December 31, 2020 and 2019.

The fair value of the Notes is measured using quoted price inputs. The Notes are not actively traded, and thus the price inputs represent a Level 2 measurement. As the quoted price inputs are highly variable from day to day, the fair value estimates could significantly increase or decrease.

The Notes are carried at their principal amount less unamortized debt discount and issuance costs, and are not carried at fair value at each period end. The original debt discount was calculated at a market interest rate for nonconvertible debt at the time of issuance, which represented a Level 3 fair value measurement based on inputs that ranged from 5% to 8%. The approximate fair value of the 2025 Notes as of December 31, 2020 was $263.4 million, and the approximate fair value of the 2023 Notes as December 31, 2020 and 2019 was $7.1 million and $195.4 million, respectively. The fair values were estimated on the basis of inputs that are observable in the market and are considered a Level 2 fair value measurement.

Leases

The Company leases office space under various operating lease agreements, which have remaining lease terms of less than one year to eight years. Prior to January 1, 2019, the Company accounted for leases under ASC Topic 840. On January 1, 2019, the Company adopted ASC Topic 842, which replaced ASC Topic 840. The most significant impact upon adoption was the recognition of lease liabilities and ROU assets for all operating leases with a term greater than 12 months on its balance sheet. Refer to Note 2, Summary of Significant Accounting Policies, for additional information on the impact of adoption.

The following discussion relates to the Company’s lease accounting policy, effective January 1, 2019, under ASC Topic 842 for the years ended December 31, 2020 and 2019.

The Company determines if an arrangement is a lease at inception. Operating leases are included in operating lease ROU assets, other current liabilities, and operating lease liabilities on the consolidated balance sheet. Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. The lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. In determining the expected lease term, the majority of the Company’s renewal options are not reasonably certain based on conditions of the Company’s existing leases and its overall business strategies. The Company will periodically reassess expected lease terms based on significant triggering events or compelling economic reasons to exercise renewal options. The Company utilizes its incremental borrowing rate based on the information available at commencement date in determining the present value of future payments. Operating lease expense for minimum lease payments is recognized on a straight-line basis over the lease term. The Company accounts for lease and non-lease components as a single lease component.

Commitments and Contingencies

From time to time the Company is involved in legal proceedings, claims and litigation related to employee claims, contractual disputes and taxes in the ordinary course of business. Although the Company cannot predict the outcome of such matters, currently the Company has no reason to believe the disposition of any current matter could reasonably be expected to have a material adverse impact on the Company’s financial position, results of operations or the ability to carry on any of its business activities.