10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2021

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number: 333-239644

VERTEX, INC.

(Exact Name of Registrant as Specified in its Charter)

Delaware	23-2081753
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
2301 Renaissance Blvd King of Prussia, Pennsylvania	19406
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (800) 355-3500

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading symbol	Name of each exchange on which registered
Class A Common Stock, Par Value $0.001 Per Share	VERX	NASDAQ

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).   Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☐	Accelerated filer	☐
Non-accelerated filer	☒	Small reporting company	☐
		Emerging growth company	☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).   Yes  ☐    No  ☒

As of May 11, 2021, the registrant had 27,458,773 shares of Class A common stock, $0.001 par value per share, and 120,117,000 shares of Class B common stock, $0.001 par value per share, outstanding.

TABLE OF CONTENTS

		Page
	Part I - Financial Information
Item 1.	Financial Statements
	Condensed Consolidated Balance Sheets as of March 31, 2021 and December 31, 2020 (unaudited)	5
	Condensed Consolidated Statements of Comprehensive Income (Loss) for the Three Months Ended March 31, 2021 and 2020 (unaudited)	6
	Condensed Consolidated Statements of Changes in Equity (Deficit) for the Three Months Ended March 31, 2021 and 2020 (unaudited)	7
	Condensed Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2021 and 2020 (unaudited)	8
	Notes to Condensed Consolidated Financial Statements (unaudited)	9
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	33
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	50
Item 4.	Controls and Procedures	51
	Part II - Other Information	52
Item 1.	Legal Proceedings	52
Item 1A.	Risk Factors	52
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	52
Item 3.	Defaults Upon Senior Securities	52
Item 4.	Mine Safety Disclosures	52
Item 5.	Other Information	52
Item 6.	Exhibits	53
	Signatures	54

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements made in this Quarterly Report on Form 10-Q that are not statements of historical fact, including statements about our beliefs and expectations and regarding future events or our future results of operations, financial condition, business, strategies, financial needs, and the plans and objectives of management, are forward-looking statements and should be evaluated as such. These statements often include words such as “anticipate,” “believe,” “expect,” “suggests,” “plans,” “intend,” “estimates,” “targets,” “projects,” “should,” “could,” “would,” “may,” “will,” “forecast,” and other similar expressions or the negatives of those terms. We base these forward-looking statements on our current expectations, plans and assumptions that we have made in light of our experience in the industry, as well as our perceptions of historical trends, current conditions, expected future developments and other factors we believe are appropriate under the circumstances at such time. As you read and consider this Quarterly Report on Form 10-Q, you should understand that these statements are not guarantees of future performance or results. The forward-looking statements are subject to and involve risks, uncertainties and assumptions, and you should not place undue reliance on these forward-looking statements. Although we believe that these forward-looking statements are based on reasonable assumptions at the time they are made, you should be aware that many factors could affect our actual results or results of operations and could cause actual results to differ materially from those expressed in the forward-looking statements. Important factors that may materially affect such forward-looking statements include, but are not limited to:

●the potential effects on our business of the current novel coronavirus (“COVID-19”) pandemic;

●our ability to attract new customers on a cost-effective basis and the extent to which existing customers renew and upgrade their subscriptions;

●our ability to sustain and expand revenues, maintain profitability, and to effectively manage our anticipated growth;

●the timing of our introduction of new solutions or updates to existing solutions;

●our ability to successfully diversify our solutions by developing or introducing new solutions or acquiring and integrating additional businesses, products, services or content;

●our ability to maintain and expand our strategic relationships with third-parties;

●risks related to our expanding international operations;

●our ability to deliver our solutions to customers without disruption or delay;

●our exposure to liability from errors, delays, fraud or system failures, which may not be covered by insurance;

●risks related to our determinations of customers’ transaction tax and tax payments;

●risks related to changes in tax laws and regulations or their interpretation or enforcement;

●our ability to manage cybersecurity and data privacy risks;

●risks related to failures in information technology, infrastructure and third party service providers;

●our ability to effectively protect, maintain and enhance our brand;

●global economic weakness and uncertainties, and disruption in the capital and credit markets;

●business disruptions related to natural disasters, epidemic outbreaks, terrorist acts, political events or other events outside of our control;

●our ability to comply with anti-corruption, anti-bribery and similar laws;

●changes in interest rates, security ratings and market perceptions of the industry in which we operate, or our ability to obtain capital on commercially reasonable terms or at all;

●any statements of belief and any statements of assumptions underlying any of the foregoing; and

●other factors beyond our control.

The risks included here are not exhaustive, and additional factors could adversely affect our business and financial performance, including factors and risks included in our Annual Report on Form 10-K for the year ended December 31, 2020 and in other sections of this Quarterly Report on Form 10-Q, including under Part II, Item 1A, Risk Factors. Moreover, we operate in a very competitive and rapidly changing environment. New risk factors emerge from time to time and it is not possible for us to identify all such risk factors, nor can we assess the impact of all such risk factors on the business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements. Given these risks and uncertainties, you should not place undue reliance on our forward-looking statements, and you should not rely on forward-looking statements as predictions of future events. The results, events, and circumstances reflected in the forward-looking statements may not be achieved or occur, and actual results, events, or circumstances could differ materially from those described in the forward-looking statements. The forward-looking statements made in this Quarterly Report on Form 10-Q speak only as of the date of this report. We undertake no obligation to update any forward-looking statements made in this report to reflect events or circumstances after the date of this report or to reflect new information or the occurrence of unanticipated events, except as required by law. If we update one or more forward-looking statements, no inference should be drawn that we will make additional updates with respect to those or other forward-looking statements.

PART I - FINANCIAL INFORMATION

Item 1. Financial Statements.

Vertex, Inc. and Subsidiaries

Condensed Consolidated Balance Sheets

As of March 31, 2021 and December 31, 2020

(Amounts in thousands, except per share data)

	March 31,		December 31,
	2021		2020
	(unaudited)
Assets
Current assets:
Cash and cash equivalents	$	277,681	$	303,051
Funds held for customers		8,745		9,222
Accounts receivable, net of allowance of $8,059, and $8,592		63,798		77,159
Prepaid expenses and other current assets		26,696		13,259
Total current assets		376,920		402,691
Property and equipment, net of accumulated depreciation		57,408		56,557
Capitalized software, net of accumulated amortization		34,642		31,989
Goodwill and other intangible assets		21,553		18,711
Deferred commissions		11,693		11,743
Deferred income tax asset		30,373		29,974
Operating lease right-of-use assets		22,981		—
Other assets		2,767		3,263
Total assets	$	558,337	$	554,928
Liabilities and Equity
Current liabilities:
Accounts payable	$	11,115	$	8,876
Accrued expenses		15,936		19,176
Distributions payable		2,700		2,700
Customer funds obligations		8,798		9,235
Accrued salaries and benefits		18,065		17,326
Accrued variable compensation		5,854		22,372
Deferred compensation, current		2,057		2,057
Deferred revenue		204,971		207,560
Current portion of long-term debt		—		882
Current portion of operating lease liabilities		4,665		—
Current portion of finance lease liabilities		267		—
Deferred rent and other		—		939
Purchase commitment and contingent consideration liabilities, current		767		845
Total current liabilities		275,195		291,968
Deferred compensation, net of current portion		6,048		5,010
Deferred revenue, net of current portion		13,162		14,702
Debt, net of current portion		—		225
Operating lease liabilities, net of current portion		26,671		—
Finance lease liabilities, net of current portion		334		—
Purchase commitment and contingent consideration liabilities, net of current portion		10,287		8,905
Deferred other liabilities		64		8,632
Total liabilities		331,761		329,442
Commitments and contingencies (Note 13)
Stockholders' equity:
Preferred shares, $0.001 par value, 30,000 shares authorized; no shares issued and outstanding		—		—
Class A common stock, $0.001 par value, 300,000 shares authorized; 26,972 and 26,327 shares issued and outstanding, respectively		27		26
Class B common stock, $0.001 par value, 150,000 shares authorized; 120,117 and 120,117 shares issued and outstanding, respectively		120		120
Additional paid in capital		205,811		206,541
Retained earnings		24,722		21,926
Accumulated other comprehensive loss		(4,104)		(3,127)
Total stockholders' equity		226,576		225,486
Total liabilities and equity	$	558,337	$	554,928

The accompanying notes are an integral part of these condensed consolidated financial statements.

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Vertex, Inc. and Subsidiaries

Condensed Consolidated Statements of Comprehensive Income (Loss)

For the three months ended March 31, 2021 and 2020

(Amounts in thousands, except per share data)

	Three Months Ended
	March 31,
	2021		2020
	(unaudited)
Revenues:
Software subscriptions	$	83,280	$	75,760
Services		14,956		13,485
Total revenues		98,236		89,245
Cost of revenues:
Software subscriptions		25,590		24,684
Services		11,343		14,778
Total cost of revenues		36,933		39,462
Gross profit		61,303		49,783
Operating expenses:
Research and development		11,459		13,079
Selling and marketing		20,150		24,333
General and administrative		24,852		37,636
Depreciation and amortization		2,827		2,869
Other operating (income) expense, net		(129)		111
Total operating expenses		59,159		78,028
Income (loss) from operations		2,144		(28,245)
Interest expense, net		535		569
Income (loss) before income taxes		1,609		(28,814)
Income tax (benefit) expense		(679)		250
Net income (loss)		2,288		(29,064)
Other comprehensive loss from foreign currency translation adjustments and revaluations, net of tax		977		2,998
Total comprehensive income (loss)	$	1,311	$	(32,062)
Net income attributable to Class A stockholders	$	413	$	—
Net income per Class A share, basic	$	0.02	$	—
Weighted average Class A common stock, basic		26,458		—
Net income attributable to Class A stockholders, diluted	$	550	$	—
Net income per Class A share, diluted	$	0.01	$	—
Weighted average Class A common stock, diluted		38,003		—
Net income (loss) attributable to Class B stockholders	$	1,875	$	(29,064)
Net income (loss) per Class B share, basic	$	0.02	$	(0.24)
Weighted average Class B common stock, basic		120,117		120,417
Net income (loss) attributable to Class B stockholders, diluted	$	1,738	$	(29,064)
Net income (loss) per Class B share, diluted	$	0.01	$	(0.24)
Weighted average Class B common stock, diluted		120,117		120,417

The accompanying notes are an integral part of these condensed consolidated financial statements.

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Vertex, Inc. and Subsidiaries

Condensed Consolidated Statements of Changes in Equity (Deficit)

For the three months ended March 31, 2021 and 2020 (unaudited)

(Amounts in thousands)

	Before Recapitalization						After Recapitalization										Accumulated
	Outstanding	Class A		Outstanding	Class B		Outstanding	Class A		Outstanding	Class B		Additional				Other		Treasury			Total		Options for
	Class A	Common		Class B	Common		Class A	Common		Class B	Common		Paid In		Accumulated		Comprehensive		Shares	Treasury		Stockholders'		Redeemable
	Shares	Stock		Shares	Stock		Shares	Stock		Shares	Stock		Capital		Deficit		Loss		Issued	Stock		Deficit		Shares
Balance, January 1, 2020	147	$	—	120,270	$	54	—	$	—	—	$	—	$	—	$	(90,701)	$	(491)	41,910	$	(38,638)	$	(129,776)	$	17,344
Remeasurement of options for redeemable shares	—		—	—		—	—		—	—		—		—		(15,242)		—	—		—		(15,242)		15,242
Distributions declared	—		—	—		—	—		—	—		—		—		(4,010)		—	—		—		(4,010)		—
Foreign currency translation adjustments and revaluations	—		—	—		—	—		—	—		—		—		—		(2,998)	—		—		(2,998)		—
Net loss	—		—	—		—	—		—	—		—		—		(29,064)		—	—		—		(29,064)		—
Balance, March 31, 2020	147	$	—	120,270	$	54	—	$	—	—	$	—	$	—	$	(139,017)	$	(3,489)	41,910	$	(38,638)	$	(181,090)	$	32,586
	Before Recapitalization						After Recapitalization										Accumulated
	Outstanding	Class A		Outstanding	Class B		Outstanding	Class A		Outstanding	Class B		Additional				Other		Treasury			Total		Options for
	Class A	Common		Class B	Common		Class A	Common		Class B	Common		Paid-in		Retained		Comprehensive		Shares	Treasury		Stockholders'		Redeemable
	Shares	Stock		Shares	Stock		Shares	Stock		Shares	Stock		Capital		Earnings		Loss		Issued	Stock		Equity		Shares
Balance, January 1, 2021	—	$	—	—	$	—	26,327	$	26	120,117	$	120	$	206,541	$	21,926	$	(3,127)	—	$	—	$	225,486	$	—
ASC 842 transition adjustment	—		—	—		—	—		—	—		—		—		508		—	—		—		508		—
Exercise of stock options, net	—		—	—		—	640		1	—		—		(6,998)		—		—	—		—		(6,997)		—
Shares issued upon vesting of Restricted Stock Units	—		—	—		—	5		—	—		—		(34)		—		—	—		—		(34)		—
Stock-based compensation expense	—		—	—		—	—		—	—		—		6,302		—		—	—		—		6,302		—
Foreign currency translation adjustments and revaluations, net of tax	—		—	—		—	—		—	—		—		—		—		(977)	—		—		(977)		—
Net income	—		—	—		—	—		—	—		—		—		2,288		—	—		—		2,288		—
Balance, March 31, 2021	—	$	—	—	$	—	26,972	$	27	120,117	$	120	$	205,811	$	24,722	$	(4,104)	—	$	—	$	226,576	$	—

The accompanying notes are an integral part of these condensed consolidated financial statements.

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Vertex, Inc. and Subsidiaries

Condensed Consolidated Statements of Cash Flows

For the three months ended March 31, 2021 and 2020

(Amounts in thousands)

	Three Months Ended
	March 31,
	2021		2020
	(unaudited)
Cash flows from operating activities:
Net income (loss)	$	2,288	$	(29,064)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		8,816		7,436
Provision for subscription cancellations and non-renewals, net of deferred allowance		379		(39)
Amortization of deferred financing costs		53		221
Stock-based compensation expense		6,543		34,920
Deferred income tax (benefit) provision		(615)		—
Non-cash operating lease costs		998		—
Other		(14)		72
Changes in operating assets and liabilities:
Accounts receivable		13,810		9,453
Prepaid expenses and other current assets		(13,437)		(2,167)
Deferred commissions		50		634
Accounts payable		2,258		(2,697)
Accrued expenses		(3,048)		(1,042)
Accrued and deferred compensation		(14,966)		(19,706)
Deferred revenue		(5,046)		(4,307)
Operating lease liabilities		(1,519)		—
Other		485		(131)
Net cash used in operating activities		(2,965)		(6,417)
Cash flows from investing activities:
Acquisition of business, net of cash acquired		(6,100)		(12,318)
Property and equipment additions		(6,195)		(5,632)
Capitalized software additions		(2,221)		(3,706)
Net cash used in investing activities		(14,516)		(21,656)
Cash flows from financing activities:
Net increase in customer funds obligations		(438)		(208)
Proceeds from line of credit		—		12,500
Principal payments on line of credit		—		(12,500)
Proceeds from long-term debt		—		175,000
Principal payments on long-term debt		—		(51,041)
Payments for deferred financing costs, net		—		(2,904)
Payments for taxes related to net share settlement of stock-based awards		(7,178)		—
Proceeds from exercise of stock options		147		—
Distributions to stockholders		—		(17,193)
Payments on financing lease liabilities		(671)		—
Net cash (used in) provided by financing activities		(8,140)		103,654
Effect of exchange rate changes on cash, cash equivalents and restricted cash		(226)		(249)
Net (decrease) increase in cash, cash equivalents and restricted cash		(25,847)		75,332
Cash, cash equivalents and restricted cash, beginning of period		312,273		83,495
Cash, cash equivalents and restricted cash, end of period	$	286,426	$	158,827
Reconciliation of cash, cash equivalents and restricted cash to the Consolidated Balance Sheets, end of period:
Cash and cash equivalents	$	277,681	$	40,416
Restricted cash—funds held for stockholder distributions		—		110,000
Restricted cash—funds held for customers		8,745		8,411
Total cash, cash equivalents and restricted cash, end of period	$	286,426	$	158,827

The accompanying notes are an integral part of these condensed consolidated financial statements.

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Vertex, Inc. and Subsidiaries

Notes to Condensed Consolidated Financial Statements (unaudited)

(Amounts in thousands, except per share data)

1.    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Nature of Business

Vertex, Inc. (“Vertex”) and its direct and indirect wholly owned subsidiaries (collectively, the “Company”) operate as solutions providers of state, local and value added tax calculation, compliance and analytics, offering software products which are sold through software license and software as a service (“cloud”) subscriptions. The Company also provides implementation and training services in connection with its software license and cloud subscriptions, transaction tax returns outsourcing, and other tax-related services. The Company sells to customers located throughout the United States of America (“U.S.”) and internationally.

Basis of Consolidation

The condensed consolidated financial statements are prepared in accordance with accounting principles generally accepted in the U.S. (“U.S. GAAP”) and include the accounts of the Company. All intercompany transactions have been eliminated in consolidation.

On January 7, 2020, the Company acquired a 60% controlling interest in Systax Sistemas Fiscais LTDA (“Systax”), a provider of Brazilian transaction tax content and software. Systax is considered a Variable Interest Entity (“VIE”) and its accounts have been included in the condensed consolidated financial statements from the acquisition date. Systax was determined to be a VIE as Vertex is the primary beneficiary of the equity interests in Systax and participates significantly in the variability in the fair value of Systax’s net assets.

Unaudited Interim Financial Information

The accompanying unaudited interim condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) for interim financial information and include the accounts of the Company. Certain information and disclosures normally included in consolidated financial statements prepared in accordance with accounting principles generally accepted in the U.S. (“GAAP”) have been condensed or omitted. Accordingly, these interim condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the related notes for the year ended December 31, 2020, included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020 (the “2020 Annual Report”) filed with the SEC on March 15, 2021. The interim condensed consolidated balance sheet as of December 31, 2020 has been derived from audited financial statements included in the 2020 Annual Report on Form 10-K for the year ended December 31, 2020. The accompanying interim condensed consolidated balance sheet as of March 31, 2021, and the interim condensed consolidated statements of comprehensive income (loss), changes in equity (deficit) and cash flows for the three months ended March 31, 2021 and 2020 are unaudited. The unaudited interim condensed consolidated financial statements have been prepared on a basis consistent with that used to prepare the annual audited consolidated financial statements and include, in the opinion of management, all adjustments, consisting of normal and recurring items, necessary for the fair presentation of the condensed consolidated financial statements. The operating results for the three months ended March 31, 2021 are not necessarily indicative of the results expected for the full year ending December 31, 2021.

Segments

The Company operates its business as one operating segment. For the three months ended March 31, 2021 and 2020, approximately 5% and 3%, respectively, of the Company’s revenues were generated outside the U.S..

Fair Value Measurement

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at a measurement date. A three-level fair value hierarchy (the “Fair Value

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Hierarchy”) prioritizes the inputs used to measure fair value. The Fair Value Hierarchy requires the Company to maximize the use of observable inputs and minimize the use of unobservable inputs. Classification in the Fair Value Hierarchy is based on the lowest of the following levels that is significant to the measurement:

Level 1: Inputs are unadjusted quoted prices in active markets for identical assets or liabilities.

Level 2: Inputs are quoted prices for similar assets and liabilities in active markets or quoted prices for identical or similar instruments in markets that are not active and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets.

Level 3: Inputs are unobservable inputs based on the Company’s assumptions and valuation techniques used to measure assets and liabilities at fair value. The inputs require significant management judgment or estimation.

The Company’s assessment of the significance of an input to a fair value measurement requires judgment, which may affect the determination of fair value and the measurement’s classification within the Fair Value Hierarchy.

Use of Estimates

The preparation of condensed consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, equity, revenues and expenses during the reporting period. Significant estimates used in preparing these condensed consolidated financial statements include: (i) the estimated allowance for subscription cancellations, (ii) expected credit losses associated with the allowance for doubtful accounts; (iii) the reserve for self-insurance, (iv) assumptions related to achievement of technological feasibility for software developed for sale, (v) product life cycles, (vi) estimated useful lives and potential impairment of long-lived assets, intangible assets and goodwill, (vii) determination of the fair value of tangible and intangible assets acquired, liabilities assumed and consideration transferred in an acquisition, (viii) amortization period of material rights and deferred commissions (ix) valuation of the Company’s stock used to measure stock-based compensation awards, (x) Black-Scholes-Merton option pricing model (“Black-Scholes model”) input assumptions used to determine the fair value of stock-based compensation awards, and (x) the potential outcome of future tax consequences of events that have been recognized in the condensed consolidated financial statements or tax returns. Actual results may differ from these estimates.

Software Development Costs

Internal-Use Software

The Company follows Accounting Standard Codification (“ASC”) 350-40, Goodwill and Other, Internal-Use Software, to account for development costs incurred for the costs of computer software developed or obtained for internal use. ASC 350-40 requires such costs to be capitalized once certain criteria are met. Internal-use software is included in internal-use software developed in property and equipment in the condensed consolidated balance sheets once available for its intended use and is depreciated over periods between 3 to 5 years. Depreciation expense for internal-use software utilized for cloud-based solutions and for software for internal systems and tools is included in cost of revenues, software subscriptions and depreciation and amortization expense, respectively, in the condensed consolidated statements of comprehensive income (loss).

Software Developed for Sale

The costs incurred for the development of computer software to be sold, leased, or otherwise marketed are capitalized in accordance with ASC 985-20, Costs of Software to be Sold, Leased or Marketed, when technological feasibility has been established. Amortization of capitalized software development costs begins when the product is available for general release. Amortization is provided on a product-by-product basis using the straight-line method over periods between 3 to 5 years and is included in cost of revenues, software subscriptions in the condensed consolidated statements of comprehensive income (loss). Capitalized software costs are subject to an ongoing assessment of recoverability based on anticipated future revenues and changes in software technologies at least annually at December 31, and whenever events or circumstances make it more likely than not that impairment may have occurred.

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Business Combinations

Upon acquisition of a company, the Company determines if the transaction is a business combination, which is accounted for using the acquisition method of accounting. Under the acquisition method, once control is obtained of a business, the assets acquired, liabilities assumed, consideration transferred and amounts attributed to noncontrolling interests, are recorded at fair value. The Company uses its best estimates and assumptions to assign fair value to the tangible and intangible assets acquired, liabilities assumed, consideration transferred, and amounts attributed to noncontrolling interests at the acquisition date. One of the most significant estimates relates to the determination of the fair value of these amounts. The determination of the fair values is based on estimates and judgments made by management. The Company’s estimates of fair value are based upon assumptions it believes to be reasonable, but which are inherently uncertain and unpredictable. Measurement period adjustments to these values as of the acquisition date are reflected at the time identified, up through the conclusion of the measurement period, which is the time at which all information for determination of the values of assets acquired, liabilities assumed, consideration transferred and noncontrolling interests is received, and is not to exceed one year from the acquisition date (the “Measurement Period”). Thus the Company may record adjustments to the fair value of these tangible and intangible assets acquired, liabilities assumed, consideration transferred and noncontrolling interests, with the corresponding offset to goodwill during this Measurement Period. Additionally, uncertain tax positions and tax-related valuation allowances are initially recorded in connection with a business combination as of the acquisition date. The Company continues to collect information and reevaluate these estimates and assumptions periodically and record any adjustments to preliminary estimates to goodwill, provided the Company is within the Measurement Period, with any adjustments to amortization of new or previously recorded identifiable intangibles being recorded to the consolidated statements of comprehensive income (loss) in the period in which they arise. In addition, if outside of the Measurement Period, any subsequent adjustments to the acquisition date fair values are reflected in the consolidated statements of comprehensive income (loss) in the period in which they arise.

Goodwill

Goodwill represents the excess of the purchase price over the fair value of net tangible and intangible assets acquired in a business combination. The Company evaluates goodwill for impairment annually at October 1 and whenever events or circumstances make it more likely than not that impairment may have occurred.

Stock-Based Compensation

The Company’s Registration Statement on Form S-1 with the SEC was declared effective on July 28, 2020, resulting in the Class A shares being registered and available for trading on the NASDAQ exchange (the “Offering”). On the effective date of the Offering, the Company adopted the 2020 Incentive Award Plan (the “2020 Plan”) and the 2020 Employee Stock Purchase Plan (the “ESPP”), which provides for the award of stock appreciation rights (“SARs”), stock options (“options”), restricted stock awards (“RSAs”), restricted stock units (“RSUs”), and participation in the ESPP (collectively, the "awards"), which are subject to guidance set forth in ASC 718, Compensation—Stock Compensation, ("ASC 718") for the award of equity-based instruments.

The Company applies the provisions of ASC 718, Compensation—Stock Compensation, for the award of equity-based instruments. The provisions of ASC 718 require a company to measure the fair value of stock-based compensation as of the grant date of the award. Stock-based compensation expense reflects the cost of employee services received in exchange for the awards.

SARs are accounted for as liabilities under ASC 718 and, as such, the Company recognizes stock-based compensation expense by remeasuring the value of the SARs at the end of each reporting period and accruing the portion of the requisite service rendered at that date. Prior to July 2, 2020, the date management determined the Company was considered to have become a public entity, the Company measured SARs at their intrinsic value. After such date, management remeasured outstanding SARs using the fair value-based method under ASC 718.

Stock-based compensation expense for stock options issued under the 2020 Plan after the Offering is measured based on the grant date fair value of the award and is estimated using the Black-Scholes model. Compensation cost is recognized on a straight-line basis over the requisite service or performance period associated with the award.

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Stock-based compensation expense for RSAs and RSUs is based on the fair value of the Company’s underlying common stock on the date of grant. Compensation cost is recognized on a straight-line basis over the requisite service or performance period associated with the award.

The ESPP permits participants to purchase Class A common stock through payroll deductions, up to a specified percentage of their eligible compensation or a lump sum contribution amount for the initial offering period. The plan is a compensatory plan as it allows participants to purchase stock at a 15% discount from the lower of the fair value of the Class A common on the first or last day of the ESPP offering period (the “ESPP discount”).The ESPP is accounted for as an equity classified award. Stock-based compensation expense for the ESPP is measured based on the fair value of the ESPP award at the start of the offering period. The fair value is comprised of the value of the ESPP discount and the value associated with the variability in the Class A common stock price during the offering period (the “Call/Put”), which is estimated using the Black-Scholes model. Compensation cost is recognized on a straight-line basis over the respective offering period.

The Company has elected to recognize award forfeitures as they occur.

Revenue Recognition

Revenue from contracts with customers

The Company recognizes revenue in accordance with ASC 606, Revenue from Contracts with Customers. Revenue is recognized upon transfer of control of promised products or services to customers in an amount that reflects the consideration expected to be received in exchange for those products or services. The Company enters into contracts that can include various combinations of products and services, which are generally capable of being distinct, and accounted for as separate performance obligations. Revenue is recognized net of allowance for subscription and non-renewal cancellations and any taxes collected from customers, which are subsequently remitted to governmental authorities.

Nature of goods and services

Licenses for on-premise software subscriptions provide the customer with a right to use the software as it exists when made available to the customer. Customers purchase a subscription to these licenses, which includes the related software and tax content updates (collectively “updates”) and product support. The updates and support, which are part of the subscription agreement, are essential to the continued utility of the software; therefore, the Company has determined the software and the related updates and support to be a single performance obligation. Accordingly, when on-premise software is licensed, the revenue associated with this combined performance obligation is recognized ratably over the license term as these subscriptions are provided for the duration of the license term. Revenue recognition begins on the later of the beginning of the subscription period or the date the software is made available to the customer to download. The Company’s on-premise software subscription prices in the initial subscription year are higher than standard renewal prices. The excess initial year price over the renewal price (“new sale premium”) is a material right that provides customers with the right to this reduced renewal price. The Company recognizes revenue associated with this material right over the estimated period of benefit to the customer, which is generally three years.

Cloud-based subscriptions allow customers to use Company-hosted software over the contract period without taking possession of the software. The cloud-based offerings also include related updates and support. Cloud-based contracts consistently provide a benefit to the customer during the subscription period; thus, the associated revenue is recognized ratably over the related subscription period. Revenue recognition begins on the later of the beginning of the subscription period or the date the customer is provided access to the cloud-based solutions.

Revenue from deliverable-based services is recognized as services are delivered. Revenue from fixed fee services is recognized as services are performed using the percentage of completion input method.

The Company has elected the "right to invoice" practical expedient for revenue related to services that are billed on an hourly basis, which enables revenue to be recognized as the services are performed.

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The Company has determined that the methods applied to measuring its progress toward complete satisfaction of performance obligations recognized over time are a faithful depiction of the transfer of control of software subscriptions and services to customers.

Significant Judgments

Contracts with customers often include promises to transfer multiple products and services to a customer. Determining whether products and services are considered distinct performance obligations that should be accounted for separately versus together may require significant judgment. Identification of the amortization periods of material rights and contract costs requires significant judgement by management.

Payment terms

Payment terms and conditions vary by contract, although the Company’s terms generally include a requirement of payment within 30-days. In instances where the timing of revenue recognition differs from the timing of payment, the Company has determined that its contracts do not include a significant financing component. The primary purpose of invoicing terms is to provide customers with simplified and predictable ways of purchasing products and services, not to receive financing from customers or to provide customers with financing.

Cost of Revenues

Cost of revenues, software subscriptions includes the direct cost to develop, host and distribute software products, the direct cost to provide customer support, and amortization of costs capitalized for software developed for sale and for internal-use software utilized for cloud-based subscriptions. Cost of revenues, services includes the direct costs of implementation, training, transaction tax returns outsourcing and other tax-related services.

Reimbursable Costs

Reimbursable costs passed through and invoiced to customers of the Company are recorded as services revenues with the associated expenses recorded as cost of revenues, services in the condensed consolidated statements of comprehensive income (loss).

Income Taxes

On July 27, 2020, the Company’s S-Corporation election (the “S Election”) was terminated by the Company’s stockholders in connection with the Offering. As a result, Vertex became taxable at the corporate level as a C-Corporation for U.S federal and state income tax purposes. In connection with the S Election termination, the Company entered into an agreement with the S-Corporation stockholders pursuant to which the Company has indemnified them for unpaid income tax liabilities and may be required to make future payments in material amounts to them attributable to incremental income taxes resulting from an adjustment to S-Corporation related taxable income (the “Tax Sharing Agreement”). In addition, the Tax Sharing Agreement indemnifies the S-Corporation stockholders for any interest, penalties, losses, costs or expenses arising out of any claim under the agreement. Correspondingly, the S-Corporation stockholders have indemnified the Company with respect to unpaid tax liabilities (including interest and penalties) attributable to a decrease in S-Corporation stockholders’ taxable income and a corresponding increase in our taxable income as a C-Corporation for any period.

Prior to July 27, 2020, as Vertex was taxed as an S-Corporation for U.S. federal and certain states income tax purposes, net income or loss was allocated to and included on the income tax returns of the S-Corporation stockholders. Historically, the Company distributed amounts to the S-Corporation stockholders to satisfy their tax liabilities resulting from allocated net income or loss. Vertex was taxed at the corporate level in those states where the S-Corporation status was not recognized or where the state imposed a tax on an S-Corporation. Accordingly, the income tax provision or benefit was based on taxable income allocated to these states. In certain foreign jurisdictions, Vertex subsidiaries were taxed at the corporate level, and the income tax provision or benefit was based on taxable income sourced to these foreign jurisdictions.

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Supplemental Cash Flow Disclosures

Supplemental cash flow disclosures are as follows for the respective periods:

	For the three months ended
	March 31,
	2021		2020
	(unaudited)
Cash paid for interest	$	69	$	559
Cash paid for income taxes	$	132	$	104
Operating cash flows from operating leases	$	1,320	$	—
Operating cash flows from finance leases	$	28	$	—
Non-cash investing and financing activities:
Purchase commitment and contingent consideration liabilities	$	2,200	$	14,344
Remeasurement of options for redeemable shares	$	—	$	15,242
Leased assets obtained in exchange for new finance lease liabilities	$	173	$	—

Recently Issued Accounting Pronouncements

As an "emerging growth company," the Jumpstart Our Business Startups Act (the “JOBS Act”) allows the Company to delay adoption of new or revised accounting pronouncements applicable to public companies until such pronouncements are made applicable to private companies. The Company has elected to delay adoption of certain new or revised accounting standards. As a result, the Company’s financial statements may not be comparable to the financial statements of issuers who are required to comply with the effective date for new or revised accounting standards that are applicable to public companies.

Recently Adopted Accounting Pronouncements

Leases

In February 2016, the FASB issued ASU No. 2016-02, Leases. This standard amends several of aspects of lease accounting, including requiring lessees to recognize operating leases with a initial term greater than one year on their balance sheet as a right-of-use asset, and a corresponding lease liability, measured at the present value of the future minimum lease payments. The standard is effective for public entities for fiscal years and interim periods beginning after December 15, 2018. The standard is effective for all other entities for fiscal years beginning after December 15, 2021, and interim periods within fiscal years beginning after December 15, 2022, with early adoption permitted.

The Company adopted ASU No. 2016-02 on January 1, 2021 using the modified retrospective transition method, which did not require the Company to adjust comparative periods. The Company’s lease assets and lease liabilities are recognized on the lease commencement date in an amount that represents the present value of future lease payments. The Company’s incremental borrowing rate, which is based on information available at the adoption date for existing leases and the commencement date for leases commencing after the adoption date, is used to determine the present value of lease payments.

The Company elected the "package of three" practical expedients permitted under the transition guidance, which allows (i) a carry forward of the historical lease classification conclusions, (ii) management’s assessment on whether a contract is or contains a lease, and (iii) the initial direct costs for any leases that exist prior to adoption of the new standard.

As a result of the adoption of ASC 842 on January 1, 2021, the Company recorded both operating lease right-of-use assets of $24,004 and operating lease liabilities of $32,562. An adjustment to retained earnings of $508, net of the deferred tax impact, was also recorded. The adoption of ASC 842 had an immaterial impact on the condensed consolidated statements of comprehensive income and cash flows for the three months ended March 31, 2021. The adoption of this standard also resulted in a change in the naming convention for leases classified historically as capital leases. These leases are now referred to as finance leases within property and equipment, with corresponding short-term and long-term debt

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liabilities being presented as “Current portion of finance lease liabilities” and “Finance lease liabilities, net of current portion”, respectively. See Note 7 for further information.

The Company does not recognize leases with an initial term less than one year (“short-term leases”) on its condensed consolidated balance sheets, and recognizes such lease payments in the condensed consolidated statements of comprehensive income (loss) on a straight-line basis over the lease term. Leases with an option to extend the related lease term or terminate early are reflected in the lease term when it is reasonably certain that the Company will exercise such options.

Credit Losses

In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, (“ASU 2016-13”) which replaces the existing incurred loss impairment model with an expected credit loss model and requires financial assets, including trade receivables, to be measured at amortized cost to be presented at the net amount expected to be collected. ASU 2016-13 is effective for annual periods, and interim periods within those years, beginning after December 15, 2019, for business entities that are public and meet the definition of an SEC filer (excluding smaller reporting companies), and after December 15, 2022 for all other entities. The Company adopted this standard effective January 1, 2021 and this guidance did not have a material impact on the Company’s condensed consolidated financial statements.

Income Taxes

In December 2019, the FASB issued ASU Update No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, (“ASU 2019-12”) which simplifies the accounting for income taxes. The guidance in ASU 2019-12 is required for annual reporting periods, including interim periods within those annual periods, beginning after December 15, 2020, for business entities that are public, and after December 15, 2021, including interim periods within those annual periods, for all other entities, with early adoption permitted.

The Company adopted this standard on January 1, 2021. There was no impact to the condensed consolidated financial statements from the implementation of this standard on the determination of income taxes for the quarter ended March 31, 2021.

Risks and Uncertainties

In December 2019, a novel strain of coronavirus (“COVID-19”) appeared. In March 2020, the World Health Organization declared the outbreak of COVID-19 to be a pandemic. The COVID-19 pandemic is continuing to have widespread, rapidly evolving and unpredictable impacts on global society, economies, financial markets and business practices. To protect the health and well-being of Company employees and customers, substantial modifications were made to employee travel policies, our offices were closed, and remained closed through March 31, 2021, with employees directed to work from home. In addition, conferences and other marketing events were cancelled or shifted to virtual-only, and the Company continued to participate virtually through March 31, 2021. The COVID-19 pandemic has impacted and may continue to impact Company operations, including employees, customers and partners, and there is substantial uncertainty in the nature and degree of its continued effects over time.

The Company did not experience any significant reductions in sales, revenues or collections through March 31, 2021 as a result of COVID-19. The uncertainty caused by the COVID-19 pandemic could, however, impact Company billings to new customers for the remainder of 2021, and may also negatively impact Company efforts to expand revenues from existing customers as they continue to evaluate certain long-term projects and budget constraints. In addition to the potential impact on sales, the Company may see delays in collections during 2021 as customers adjust their operating protocols to accommodate implementation of new criteria to protect the health and well-being of their employees and customers. However, these delays are not expected to materially impact the business, and thus the Company has not recorded additional credit losses associated with the allowance for doubtful accounts in connection with any delays. The Company believes it has ample liquidity and capital resources to continue to meet its operating needs, and to service debt and other financial obligations.

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The extent to which the COVID-19 pandemic impacts the business going forward will depend on numerous evolving factors that cannot reliably be predicted, including the duration and scope of the pandemic; governmental, business, and individuals’ actions in response to the pandemic; and the impact on economic activity, including the possibility of recession or financial market instability. These factors may adversely impact consumer, business and government spending on technology as well as customers’ ability to pay for Company products and services on an ongoing basis. This uncertainty also affects management’s accounting estimates and assumptions, which could result in greater variability in a variety of areas that depend on these estimates and assumptions, including estimated allowance for subscription cancellations, product life cycles and estimated lives of long-lived assets.

Reclassifications

Certain amounts in the  prior period financial statements have been reclassified to conform to the presentation of the current period financial statements. These reclassifications had no effect on previously reported comprehensive income or loss.

2. REVENUE RECOGNITION    

See Note 1 for a description of the Company’s revenue recognition accounting policy.

Disaggregation of revenue

The table reflects revenue by major source for the following periods:

	Three months ended
	March 31,
		2021	2020
	(unaudited)
Sources of revenues:
Software subscriptions	$	83,280	$	75,760
Services		14,956		13,485
Total revenues	$	98,236	$	89,245

Contract balances

Timing of revenue recognition may differ from the timing of invoicing customers. A receivable is recorded in the consolidated balance sheets when customers are billed related to revenue to be collected and recognized for subscription agreements as there is an unconditional right to invoice and receive payment in the future related to these subscriptions. A receivable and related revenue may also be recorded in advance of billings to the extent services have been performed and the Company has a right under the contract to bill and collect for such performance. Subscription-based customers are generally invoiced annually at the beginning of each annual subscription period. Accounts receivable is presented net of an allowance for potentially uncollectible accounts and estimated cancellations of software license and cloud-based subscriptions (the “allowance”) of $8,059 and $8,592 at March 31, 2021 and December 31, 2020, respectively. The allowance represents future expected credit losses over the life of the receivables based on past experience, current information and forward-looking economic considerations.

The beginning and ending balances of accounts receivable, net of allowance, are as follows:

	For the three months ended		For the year ended
	March 31, 2021		December 31, 2020
	(unaudited)
Balance, beginning of period	$	77,159	$	70,367
Balance, end of period		63,798		77,159
(Decrease) increase, net	$	(13,361)	$	6,792

A contract liability is recorded as deferred revenue on the consolidated balance sheets when customers are billed in advance of performance obligations being satisfied, and revenue is recognized after invoicing ratably over the subscription period or over the amortization period of material rights. Deferred revenue is reflected net of a related deferred allowance

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for subscription cancellations (the “deferred allowance”) of $5,515 and $6,432 at March 31, 2021 and December 31, 2020, respectively. The deferred allowance represents the portion of the allowance for subscription cancellations associated with deferred revenue.

The beginning and ending balances of and changes to the allowance and the deferred allowance are as follows:

	For the three months ended March 31,
	2021				2020
	Balance			Net Change	Balance			Net Change
Allowance balance, January 1	$	(8,592)			$	(7,515)
Allowance balance, March 31		(8,059)				(7,476)
Change in allowance			$	(533)			$	(39)
Deferred allowance balance, January 1		6,432				5,614
Deferred allowance balance, March 31		5,515				5,118
Change in deferred allowance				917				496
Net amount charged to revenues			$	384			$	(457)

The portion of deferred revenue expected to be recognized in revenue beyond one year is included in deferred revenue, net of current portion in the condensed consolidated balance sheets.

The tables provide information about the balances of and changes to deferred revenue for the following periods:

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Balances:
Deferred revenue, current	$	204,971	$	207,560
Deferred revenue, non-current		13,162		14,702
Total deferred revenue	$	218,133	$	222,262

	For the three months ended
	March 31,
	2021		2020
	(unaudited)
Changes to deferred revenue:
Beginning balance	$	222,262	$	205,791
Additional amounts deferred		94,107		84,938
Revenues recognized		(98,236)		(89,245)
Ending balance	$	218,133	$	201,484

Contract costs

Deferred sales commissions earned by the Company’s sales force and certain sales incentive programs and vendor referral agreements are considered incremental and recoverable costs of obtaining a contract with a customer. An asset is recognized for these incremental contract costs and reflected as deferred commissions in the consolidated balance sheets. These contract costs are amortized on a straight-line basis over a period consistent with the transfer of the associated product and services to the customer, which is generally three years. Amortization of these costs are included in selling and marketing expense in the consolidated statements of comprehensive income (loss). The Company periodically reviews

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these contract assets to determine whether events or changes in circumstances have occurred that could impact the period of benefit of these assets. There were no impairment losses recorded for the periods presented.

The table provides information about the changes to contract cost balances as of and for the following periods:

	For the three months ended
	March 31,
	2021		2020
Deferred commissions:	(unaudited)
Beginning balance	$	11,743	$	11,196
Additions		2,058		1,972
Amortization		(2,108)		(2,605)
Ending balance	$	11,693	$	10,563

3.    BUSINESS COMBINATION

On January 25, 2021, the Company executed an Asset Purchase Agreement with Tellutax LLC, a Portland, Oregon-based edge computing technology startup (“Tellutax”), to acquire substantially all of Tellutax’s assets (the “Tellutax Acquisition”). Cash consideration paid for the acquisition was $6,100, funded through cash on hand, and serves to strengthen the Company’s technology roadmap and hybrid cloud strategy enabling it to better serve customers in an increasingly hyper-connected environment. The Tellutax Acquisition entitles the sellers to contingent consideration if sales targets are met during a period of time following the acquisition. 

The Tellutax Acquisition was accounted for as a business combination. The total preliminary purchase price was allocated to the net assets acquired based on Management’s determination of their estimated fair values using available information as of the acquisition date. The excess of purchase consideration over the net assets acquired is recorded as goodwill, which primarily reflects the value of expected future synergies, the existence of intangible assets not recognized under U.S. GAAP such as the value of the assembled workforce and other market factors. The Company expects that goodwill associated with the Tellutax Acquisition will be deductible for tax purposes. The preliminary values recorded, which are reflected in the table below, will be adjusted during the measurement period as more detailed analyses are performed and further information becomes available regarding the fair values of these amounts on the acquisition date. Any subsequent adjustments to these values not associated with determination of their fair values on the acquisition date will be recorded in the consolidated statements of comprehensive income (loss) in the period the change is identified.

The preliminary purchase price for the Tellutax Acquisition includes cash paid at closing plus an estimated fair value of contingent consideration of $2,200 (the “Tellutax Contingent Consideration”) as of January 25, 2021. The following table presents the allocation of the preliminary purchase price recorded in the condensed consolidated balance sheet as of the acquisition date:

	January 25, 2021
	(unaudited)
Capitalized Software - Developed technology	$	3,600
Goodwill		4,700
Total	$	8,300

The Company has included the financial results of Tellutax in the condensed consolidated statement of comprehensive income (loss) from the date of acquisition. As the Tellutax Acquisition did not have a material impact on the Company’s reported revenue or net income for the three months ended March 31, 2021, pro forma financial information has not been presented.

The fair value of developed technology was valued using the multi-period excess earnings method, which is a variation of the income approach. This method estimates an intangible asset’s value based on the present value of the incremental after-tax cash flows attributable to the intangible asset. The significant assumptions used in the developed technology valuation included forecasted results and discount rate.

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The fair value of Tellutax Contingent Consideration is estimated using a Monte-Carlo simulation to compute the expected cash flows from earn-out payments specified in the purchase agreement. Such estimate represents a recurring fair value measurement with significant unobservable inputs, which management considers to be Level 3 measurements under the Fair Value Hierarchy. The significant assumptions used in these calculations included forecasted results and the estimated likelihood for each performance scenario. The Tellutax Contingent Consideration is based on three potential earn-out payments determined by periodic revenue achievements over a thirty-month period.  Earn-out payments had no maximum limit, but if certain targets are not met, there would be no earn-out payment for the applicable measurement period. The estimated fair value of the Tellutax Contingent Consideration recorded as of the acquisition date was $2,200.

4.      FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS

The Company has investments in money market accounts, which are included in cash and cash equivalents on the consolidated balance sheets. Fair value inputs for these investments are considered Level 1 measurements within the Fair Value Hierarchy since money market account fair values are known and observable through daily published floating net asset values.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The Company has investments in money market accounts, which are included in cash and cash equivalents on the consolidated balance sheets. Fair value inputs for these investments are considered Level 1 measurements within the Fair Value Hierarchy since money market account fair values are known and observable through daily published floating net asset values.

The following table summarizes the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis:

	Fair Value Measurements Using
As of March 31, 2021	Fair Value		Prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Money market funds	$	225,215	$	225,215	$	-	$	-
Tellutax Contingent Consideration*	$	2,200	$	-	$	-	$	2,200
	Fair Value Measurements Using
As of December 31, 2020	Fair Value		Prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Money market funds	$	265,270	$	265,270	$	-	$	-

* As discussed in Note 3, this amount reflects the Tellutax Contingent Consideration for potential payments based on achievement of future revenue targets.

Assets and Liabilities for Which Fair Value is Only Disclosed

The residual carrying amount of cash and cash equivalents and the carrying amount of funds held for customers were the same as their respective fair values and are considered Level 1 measurements.

The carrying amounts for accounts receivable, accounts payable, and accrued expenses approximate their relative fair values due to their short-term nature and are considered Level 2 measurements.

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Non-recurring Fair Value Measurements

The Tellutax Acquisition on January 25, 2021, was accounted for as a business combination and the total purchase price was allocated to the net assets acquired and liabilities assumed based on their estimated fair values. See Note 3.

5.      PROPERTY AND EQUIPMENT

The major components of property and equipment are as follows:

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Leasehold improvements	$	20,901	$	20,907
Equipment		40,219		41,410
Computer software purchased		11,679		11,620
Internal-use software developed:
Cloud-based customer solutions		65,423		65,423
Internal systems and tools		28,886		25,349
Furniture and fixtures		7,676		7,674
In-process internal-use software		5,836		3,304
		180,620		175,687
Less accumulated depreciation		(123,212)		(119,130)
Property and equipment, net	$	57,408	$	56,557

Depreciation expense for property and equipment, excluding all internal-use software developed and finance leases, was $1,906 and $2,175 for the three months ended March 31, 2021 and 2020 (unaudited), respectively. Depreciation for property and equipment, excluding internal-use software developed for cloud-based customer solutions, is reflected in depreciation and amortization in the condensed consolidated statements of comprehensive income (loss).

Finance lease amortization was $224 for the three months ended March 31, 2021 and depreciation expense for assets held under capital leases was $168 for the three months ended March 31, 2020, and are included in depreciation and amortization expense in the condensed consolidated statements of comprehensive income (loss). Assets under finance leases was $1,533, net of accumulated depreciation of $224, at March 31, 2021 are included in property and equipment in the condensed consolidated balance sheets.  Assets under capital leases of $1,360, net of accumulated depreciation of $1,369, at March 31, 2020 (unaudited) are included in property and equipment in the condensed consolidated balance sheets.

The major components of internal-use software are as follows:

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Internal-use software developed	$	94,309	$	90,772
Less accumulated depreciation		(68,463)		(65,090)
		25,846		25,682
In-process internal-use software		5,836		3,304
Internal-use software developed, net	$	31,682	$	28,986

Amounts capitalized for internal-use software and included in property and equipment additions on the condensed consolidated statements of cash flows are as follows:

	As of March 31,		As of March 31,
	2021		2020
	(unaudited)		(unaudited)
Cloud-based customer solutions	$	3,518	$	3,834
Internal systems and tools		2,551		382
Total	$	6,069	$	4,216

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In-process internal-use software developed is not depreciated until it is available for its intended use. Depreciation expense for internal-use software developed for cloud-based customer solutions for the three months ended March 31, 2021 and 2020 (unaudited) was $2,676 and $2,011, respectively, and is included in cost of revenues, software subscriptions in the condensed consolidated statements of comprehensive income (loss).

Depreciation expense for internal-use software developed for internal systems and tools for the three months ended March 31, 2021 and 2020 (unaudited) was $697 and $526, respectively, and is included in depreciation and amortization in the condensed consolidated statements of comprehensive income (loss).

6.    CAPITALIZED SOFTWARE

Capitalized software includes acquired software and direct labor and related expenses for software developed for sale for new products and enhancements to existing products.

The major components of capitalized software are as follows:

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Capitalized software	$	64,515	$	63,071
Less accumulated amortization		(35,385)		(32,217)
		29,130		30,854
In-process capitalized software		5,512		1,135
Capitalized software, net	$	34,642	$	31,989

Software development costs capitalized for the three months ended March 31, 2021 and 2020 (unaudited) were $2,221 and $3,706, respectively. During the three months ended March 31, 2021, a preliminary value of $3,600 for developed technology the Company acquired in the Tellutax business combination was recorded and is reflected in in-process capitalized software as the Company undertakes necessary enhancements to integrate it with the Company’s existing software architecture.

Capitalized software amortization expense for the three months ended March 31, 2021 and 2020 was $3,168 and $2,556, respectively, and is included in cost of revenues, software subscriptions in the condensed consolidated statements of comprehensive income (loss).

7.   LEASES

The Company leases office space, IT equipment and office equipment. Leases with an initial term of 12 months or less are not recorded on the condensed consolidated balance sheets and lease expense is recognized over the term of these leases on a straight-line basis. The Company’s leases have remaining terms of up to 9 years.

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The following table sets forth the Company’s lease assets and liabilities and their balance sheet location as follows:

		As of March 31,
	Balance Sheet Location	2021
Lease assets:		(unaudited)
Operating lease right-of-use assets	Operating lease right-of-use assets	$	22,981
Finance lease assets	Property and equipment, net (Note 5)		1,309
Total lease assets		$	24,290
Lease liabilities:
Current:
Operating lease liabilities	Current portion of operating lease liabilities	$	4,665
Finance lease liabilities	Current portion of finance lease liabilities		267
Total current lease liabilities			4,932
Non-current:
Operating lease liabilities	Operating lease liabilities, net of current portion		26,671
Finance lease liabilities	Finance lease liabilities, net of current portion		334
Total non-current lease liabilities			27,005
Total lease liabilities		$	31,937

The major components of lease cost is as follows:

	For the three months ended
	March 31, 2021
	(unaudited)
Operating lease cost	$	1,169
Finance lease cost:
Amortization of lease assets		224
Interest on lease liabilities		7
Total lease cost	$	1,400

The weighted-average term and discount rate for leases is as follows:

	As of March 31,
	2021
	(unaudited)
Weighted-average remaining lease term (years):
Operating leases		7.2
Finance leases		1.8
Weighted-average discount rate:
Operating leases		2.2	%
Finance leases		2.4	%

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Lease liability maturities for the next five years and thereafter are as follows as of March 31, 2021:

	Operating Leases		Finance Leases
	(unaudited)
Remainder of 2021 (nine months remaining)	$	4,177	$	293
2022		4,529		289
2023		4,460		60
2024		4,464		10
2025		4,382		-
Thereafter		12,531		-
Total lease payments		34,543		652
Less: Imputed interest		(3,207)		(51)
Present value of lease liabilities	$	31,336	$	601

Lease liability maturities for the next five years and thereafter under the previous lease accounting standard are as follows:

	As of December 31, 2020
	Operating Leases		Capital Leases
2021	$	5,442	$	915
2022		4,518		230
2023		4,459		—
2024		4,464		—
2025		4,382		—
Thereafter		12,531		—
Total Lease Payments	$	35,796		1,145
Less amount representing interest				(38)
Present value of minimum lease payments				1,107
Less current portion				(882)
Capital lease obligations, net of current portion			$	225

8.    GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill and other intangible assets were as follows:

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Goodwill	$	19,529	$	16,329
Other intangible assets, net		2,024		2,382
	$	21,553	$	18,711

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The changes in the carrying amount of goodwill for the three months ended March 31, 2021 are as follows:

Balance, January 1, 2021	$	16,329
Acquisition of Tellutax (Note 3)		4,700
Foreign currency translation adjustments		(1,500)
Balance, March 31, 2021, gross		19,529
Accumulated impairment losses		—
Balance, March 31, 2021, net	$	19,529

The Company has recognized various amortizable other intangible assets in connection with acquisitions, including related to customer relationships, technology, and tradenames. The following tables provide additional information for other intangible assets, which are individually not material to the condensed consolidated financial statements:

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Other intangible assets
Weighted average amortization period (years)		5.5		5.5
Gross value	$	2,566	$	2,825
Accumulated amortization		(542)		(443)
Carrying value	$	2,024	$	2,382

	For the three months ended March 31, 2021
	Cost of Revenues, Software Subscriptions		Selling and Marketing Expense		Total Expense
Amortization of acquired intangible assets	$	61	$	84	$	145

9.DEBT

Credit Agreement

On March 31, 2020, the Company entered into a credit agreement with a bank, which was subsequently amended on April 3, 2020 to permit another bank to be a party to the agreement, consisting of a $175,000 term loan (the “Term Loan”) and a $100,000 committed line of credit (the “Line of Credit”) (collectively, the “Credit Agreement”).

A portion of the Offering proceeds was used to repay the $175,000 Term Loan in full on July 31, 2020.

The Line of Credit matures in March 2025 and had no outstanding borrowings at March 31, 2021 or December 31, 2020. The Company has the option to select an applicable interest rate at either the bank base rate plus an applicable margin (the “Base Rate Option”) or the LIBOR plus an applicable margin (the “LIBOR Option”). The applicable margins are determined by certain financial covenant performance as defined in the Credit Agreement. At March 31, 2021, the Base Rate Option and LIBOR Option applicable to Line of Credit borrowings were 3.25% and 2.00%, respectively.

The Credit Agreement is collateralized by certain assets of the Company and contains financial and operating covenants. The Company was in compliance with these covenants at March 31, 2021.

10.STOCKHOLDERS’ EQUITY

Recapitalization and Initial Public Offering

On July 28, 2020, the Company filed its amended and restated certificate of incorporation with the Delaware Secretary of State to: (i) effect a three-for-one forward stock split (the “Stock Split”); (ii) establish a new capital structure for the

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Company (the “New Capital Structure”); and (iii) effect a share exchange (the “Share Exchange”) (collectively, the “Recapitalization”). The Stock Split resulted in each one share owned by a stockholder being exchanged for three shares of common stock, and the number of shares of the Company’s common stock issued and outstanding was increased proportionately based on the Stock Split. After the Stock Split, the Share Exchange occurred, resulting in stockholders of record exchanging their existing Class A and Class B common stock (“former Class A” and “former Class B”, respectively) for newly created shares of Class A and Class B common stock (“Class A” and “Class B”, respectively) issued in connection with the New Capital Structure. The effect of the Stock Split is recognized retrospectively in the condensed consolidated financial statements.

In connection with the New Capital Structure, Treasury Stock was retired and amounts associated with the Treasury Stock were reclassified to additional paid in capital. Thus, at March 31, 2021 and December 31, 2020, there was no Treasury Stock.

Common Stock

During March 31, 2021, the Company issued an aggregate 640 shares of Class A related to the exercise of stock options, net of 356 shares returned to the Company in lieu of payment of the exercise price and taxes due on these exercises. During March 31, 2021, the Company also issued 5 shares Class A in connection with the vesting of RSUs, net of 1 share returned to the Company in lieu of payment of taxes due on the vesting of these RSUs.

At March 31, 2020, the Company had 147 shares of former Class A common stock and 120,270 shares of former Class B common stock outstanding. At March 31, 2020, members of a family (the “Family”) owned all outstanding shares of both former classes of common stock. There were no dividend or liquidation preference differences between the former Class A and former Class B shares. There were common stock equivalents outstanding at March 31, 2020 held by non-Family members that entitled such holders to receive an equivalent number of former Class B shares upon exercise.

In connection with establishing the New Capital Structure in July 2020, the shareholders authorized 450,000 shares of common stock, par value $0.001 per share, and 30,000 shares of preferred stock, par value $0.001 per share. In connection with the New Capital Structure, common stock is divided into two classes, Class A with one vote per share, and Class B with ten votes per share. The rights of the holders of Class A and Class B are identical, except with respect to voting and conversion rights. Upon transfer of Class B shares to a non-Family member, such shares will automatically convert to an equivalent number of Class A shares with the respective voting rights attributable to such new shares. Authorized Class A and Class B shares are 300,000 and 150,000 shares, respectively. There are no dividend or liquidation preference differences between Class A and Class B.

Distributions

The Board declared and paid aggregate distributions pro rata to stockholders of the former Class A and Class B common stock of $4,010 ($0.03 per share) during the three months ended March 31, 2020.

Tax Sharing Agreement Payments

In connection with termination of the Company’s S-Corporation status effective July 27, 2020, the Company entered into a Tax Sharing Agreement with the former S-Corporation shareholders. See Note 1. During the three months ended March 31, 2021, the Company did not distribute to or receive any amounts from the former S-Corporation shareholders under the Tax Sharing Agreement. The Company has an estimated liability of $2,700 at March 31, 2021 and December 31, 2020 in connection with obligations under the Tax Sharing Agreement for estimated amounts to be distributed to the former S-Corporation shareholders for income taxes related to the allocation of taxable income to the S-Corporation short tax period ended July 26, 2020. This number is subject to change based upon the finalization of the associated tax returns for the 2020 S-Corporation short tax period. The Company is required to settle this liability on or before July 30, 2021 under the Tax Sharing Agreement. All obligations of the Company under the Tax Sharing Agreement are satisfied by adjustments of additional paid in capital.

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11.    EARNINGS PER SHARE

The table below illustrates the calculation of basic and diluted net income (loss) per common share for the Class A common and Class B common for the periods reflected below. The weighted average shares outstanding have been retrospectively restated to reflect the Share Exchange for all periods prior to the Offering, resulting in the Class A shares representing non-Family-owned shares and Class B representing Family-owned shares for all periods presented. See Note 10 for further information on the Share Exchange.

	For the Three Months Ended March 31,
Class A common stock:	2021			2020
	(unaudited)
Numerator, basic:
Net income (loss) attributable to all stockholders	$	2,288		$	(29,064)
Class A common stock as a percentage of total shares outstanding, basic		18.05	%		—	%
Net income attributable to Class A stockholders, basic	$	413		$	—
Numerator, diluted:
Net income (loss) attributable to all stockholders	$	2,288		$	(29,064)
Class A common stock as a percentage of total shares outstanding, diluted		24.06	%		—	%
Net income attributable to Class A stockholders, diluted	$	550		$	—
Denominator, basic and diluted:
Weighted average Class A common stock, basic		26,458			—
Dilutive effect of common stock equivalents*		11,545			—
Weighted average Class A common stock, diluted		38,003			—
Net income per Class A share, basic	$	0.02		$	—
Net income per Class A share, diluted	$	0.01		$	—

*     The following weighted-average outstanding shares of common stock equivalents were excluded from the computation of diluted net income (loss) per share attributable to Class A stockholders because the impact of including them would have been anti-dilutive: 84 and 3,734 for the three months ended March 31, 2021 and 2020, respectively.

	For the Three Months Ended March 31,
Class B common stock:	2021			2020
	(unaudited)
Numerator, basic:
Net income (loss) attributable to all stockholders	$	2,288		$	(29,064)
Class B common stock as a percentage of total shares outstanding, basic		81.95	%		100.00	%
Net income (loss) attributable to Class B stockholders, basic	$	1,875		$	(29,064)
Numerator, diluted:
Net income (loss) attributable to all stockholders	$	2,288		$	(29,064)
Class B common stock as a percentage of total shares outstanding, diluted		75.94	%		100.00	%
Net income (loss) attributable to Class B stockholders, diluted	$	1,738		$	(29,064)
Denominator, basic and diluted:
Weighted average Class B common stock, basic		120,117			120,417
Dilutive effect of common stock equivalents		—			—
Weighted average Class B common stock, diluted		120,117			120,417
Net income (loss) per Class B share, basic	$	0.02		$	(0.24)
Net income (loss) per Class B share, diluted	$	0.01		$	(0.24)

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12.    STOCK-BASED AWARD PLANS

On the effective date of the Offering, the Company adopted the 2020 Plan and the ESPP.

The 2020 Plan provides the ability to grant cash and equity-based incentive awards to eligible employees, directors and service providers in order to attract, retain and motivate those that make important contributions to the Company. The 2020 Plan provides for the award of stock options, RSAs, RSUs, SARs and other cash compensation.

The ESPP provides eligible employees with rights during each six-month ESPP offering period to purchase shares of the Company’s Class A common at the ESPP discount through payroll deductions, except for the initial offering period (July 28 to November 30, 2020) whereby the participants were permitted to make lump sum contributions to the ESPP for such period. Amounts withheld or received from participants are reflected in accrued salaries and benefits in the consolidated balance sheets until such shares are purchased. Amounts withheld from participants for the offering period ending May 31, 2021 aggregated $810 as of March 31, 2021.

Prior to the adoption of the 2020 Plan, the Company had a SAR plan for the purpose of providing incentives to key members of management and consultants to contribute to the growth and financial success of the Company. As a result of the Offering, SAR participants were offered the option to either redeem their SARs upon the occurrence of the Offering or amend their SARs pursuant to which, upon effectiveness of the 2020 Plan, such SARs would become options to purchase shares of Class A common stock under the 2020 Plan (the “SAR Exchange Offer”). All SAR participants eligible to receive the SAR Exchange Offer accepted and had their outstanding SARs converted to stock options with equivalent terms under the 2020 Plan at the Offering effective date (the “Converted SARs”) of July 28, 2020. This was considered a modification of these SAR awards which was recorded in the respective quarter this occured. The SAR plan was subsequently retired (“Retired SAR Plan”) and any SARs issued after such date will be granted under the 2020 Plan.

Prior to the adoption of the 2020 Plan, the Company had options outstanding to purchase shares of former Class B common stock. Upon the effectiveness of the Offering these options were amended and exchanged for options to purchase an equivalent number of Class A shares at the same exercise price and vesting, subject to many of the terms of the 2020 Plan. These options remain subject to expiration in connection with a Triggering Event under the terms of the original option agreements (the “Amended Options”). Any options issued subsequent to this exchange will be granted under the 2020 Plan.

2020 Plan

As of March 31, 2021, 1,857 shares of Class A common were available for issuance under the 2020 Plan.

Awards issued under the 2020 Plan vest based on service criteria established by the Board. The Company has elected to account for forfeitures as they occur rather than estimate forfeitures at date of grant.

Retired SAR Plan

At March 31, 2020, the fair value of the common stock underlying the SAR Awards was determined by the Board with assistance from management and an independent third-party valuation firm. The determination of value used the market and income approaches, with an adjustment for marketability discount pertinent to private company entities in arriving at the per share fair value (the “valuation methodology”). Under the market approach, the guideline public company method is used, which estimates the fair value of the Company based on market prices of stock of guideline public companies. The income approach involves projecting the future benefits of owning an asset and estimating the present value of those future benefits by discounting them based upon the time value of money and the investment risks associated with ownership. At the end of 2019, due to the consideration by the Board of pursuing the Offering, the valuation methodology began to consider the impact of such an event on the value of the Company’s common stock underlying the awards. As the Company approached the Offering effective date, this resulted in increases in the value of the SAR Awards which resulted in corresponding increases to compensation expense during 2020 which exceeded historical results.  

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Amended Options

Prior to the amendment of the options in connection with the Offering in July 2020, the options permitted holders to put their exercised shares back to the Company, thus the options were classified as temporary equity and included in “Options for Redeemable Shares” on the condensed consolidated balance sheet at March 31, 2020. The Company recorded an increase in the value of Options for Redeemable Shares of $15,242 during the three months ended March 31, 2020, pertaining to the 3,849 in options outstanding.  As all options outstanding were fully vested, no related compensation expense was recorded for the three months ended March 31, 2020.

In connection with the amendment, the option holders’ ability to put the exercised Amended Option shares to the Company in order to attain liquidity was exchanged for the right by the holders to exercise these options and sell the related shares on the NASDAQ exchange. As a result of the put right no longer being applicable, the options were no longer considered temporary equity and were reclassified to stockholders equity at the time of the exchange.

Options under 2020 Plan

The following table summarizes activity for options outstanding under the 2020 Plan:

				Weighted
			Weighted	Average
			Average	Remaining	Aggregate
			Exercise	Contractual	Intrinsic
2020 Plan Option Activity	Units		Price	Life (Years)	Value
Outstanding at January 1, 2021	11,876		—
Granted	251	$	32.16
Forfeited	(156)	$	3.30
Exercised	(996)	$	2.18		$	23,220
2020 Plan options outstanding at March 31, 2021	10,975	$	3.13	5.26	$	206,866
2020 Plan options exercisable at March 31, 2021	6,574	$	1.79	3.56	$	132,747

The detail of options outstanding, vested and exercisable under the 2020 Plan as of March 31, 2021 is as follows:

	Options Outstanding		Options Vested and Exercisable
		Weighted		Weighted
		Average		Average
Exercise Prices	Units	Life (Years)	Units	Life (Years)
$0.15 to $0.71	2,382	*	2,382	—
$2.15	863	3.9	863	3.9
$2.50	2,475	5.2	1,846	5.1
$2.67	660	5.9	283	5.9
$3.17	1,486	7.0	735	7.1
$3.73	2,175	8.5	465	8.2
$4.70	683	8.9	—	—
$32.16	251	9.9	—	—
	10,975		6,574

*Amended Options have indefinite contractual lives

The Board intends all options granted to be exercisable at a price per share not less than the per share fair market value of the Company’s Class A common stock underlying the options on the date of grant. Compensation expense for new option awards issued subsequent to the Offering to participants under the 2020 Plan are measured based on the grant date fair value of the awards and recognized in the condensed consolidated statements of comprehensive income (loss) over the period during which the participant is required to perform the requisite services. The vesting period is generally one to four years. The grant date fair value of options is estimated using the Black-Scholes model.

There were no options issued or outstanding under the 2020 Plan for the three months ended March 31, 2020. The Company issued 251 options under the 2020 Plan during the three months ended March 31, 2021. The assumptions used

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in the Black-Scholes model to determine the value of the options issued during the three months ended March 31, 2021 are as follows:

Fair market value of common stock	$	32.16
Volatility		36.8	%
Expected term (years)		6.0
Expected dividend yield		—	%
Risk-free interest rate		0.4	%

The fair market value of common stock reflects the market closing price on NASDAQ on the option grant date. As of the valuation date, the Company lacked sufficient historical data on the volatility of its stock price. Selected volatility is representative of expected future volatility and was based on the historical and implied volatility of comparable publicly traded companies over a similar expected term. The expected term represents the term the options are expected to be exercised over, which differs from the term of the option grants which is ten years. The Company does not expect to pay dividends. The risk-free interest rate was based on the rate for a U.S. Treasury zero-coupon issue with a term that closely approximates the expected term of the option grants.

During the three months ended March 31, 2021, the Company recognized aggregate stock-based compensation expense for options and Converted SARs that were exchanged for options under the 2020 Plan of $3,768.  At March 31, 2021, $30,605 of unrecognized compensation expense associated with options and Converted SARs is expected to be recognized over a weighted average period of approximately 3.6 years.

Restricted Stock Units

The following table summarizes RSU activity for the three months ended March 31, 2021:

		Weighted
		Average
		Grant Date Fair
	Units	Value Per Share
Outstanding at January 1, 2021	101	$	23.80
Granted	281		32.22
Vested	(6)		35.09
Forfeited	—		—
Outstanding at March 31, 2021	376	$	30.51

There were no RSUs issued or outstanding for the three months ended March 31, 2020. Stock-based compensation cost for RSUs is measured based on the fair value of the Company’s underlying common stock on the date of grant and is recognized on a straight-line basis in the condensed consolidated statements of comprehensive income (loss) over the period during which the participant is required to perform services in exchange for the award, which is generally one to four years.  Vested RSUs are settled by issuing Class A shares or the equivalent value in cash at the Board’s discretion. During the three months ended March 31, 2021, the Company recognized stock-based compensation expense for RSUs of $436. At March 31, 2021, $10,775 of unrecognized compensation cost for RSUs is expected to be recognized over a weighted average period of approximately 3.8 years.

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Restricted Stock Awards

The following table summarizes RSA activity for the three months ended March 31, 2021:

		Weighted
		Average
		Grant Date Fair
	Units	Value Per Share
Outstanding at January 1, 2021	670	$	19.00
Granted	—		—
Vested	—		—
Forfeited	(7)		19.00
Outstanding at March 31, 2021	663	$	19.00

There were no RSAs issued or outstanding for the three months ended March 31, 2020. Stock-based compensation cost for RSAs is measured based on the fair value of the Company’s underlying common stock on the date of grant and is recognized on a straight-line basis in the condensed consolidated statements of comprehensive income (loss) over the period during which the participants are required to perform services in exchange for the award, which is generally one to four years.  Vested RSAs are settled by issuing Class A shares upon vesting.  During the three months ended March 31, 2021, the Company recognized stock-based compensation expense for RSAs of $2,209, net of forfeitures related to these awards. At March 31, 2021, $6,588 of unrecognized compensation cost for RSAs is expected to be recognized over a weighted average period of approximately 2.4 years.

Employee Stock Purchase Plan

The ESPP permits participants to purchase Class A common stock through payroll deductions of up to a specified percentage of their eligible compensation. The maximum number of shares that may be purchased by a participant during any offering period is determined by the plan administrator in advance of each offering period.

On the first trading day of each offering period, each participant will automatically be granted an option to purchase shares of Class A common. The option will expire at the end of the applicable offering period and will be exercised at that time to the extent of the payroll deductions  accumulated or contributions made during such offering period. The purchase price of the shares, in the absence of a contrary designation, is 85% of the lower of the fair value of the Class A common on the first or last day of the ESPP offering period. Participants may voluntarily end their participation in the plan at any time during a specified period prior to the end of the applicable offering period and will be paid their accrued payroll deductions and related contributions, if applicable, that have not yet been used to purchase shares of Class A common. If a participant withdraws from the plan during an offering period, the participant cannot rejoin until the next offering period. Participation ends automatically upon a participant's termination of employment.

A total of 1,000 shares of Class A common were initially reserved for issuance under the ESPP. The number of shares available for issuance under the ESPP will be increased annually on January 1 of each calendar year beginning in 2021 and ending in and including 2030, by an amount equal to the lesser of (i) 1% of the shares of Class A and Class B common stock outstanding on the final day of the immediately preceding calendar year and (ii) such smaller number of shares as is determined by the Board, provided that no more than 16,000 shares of Class A common stock may be issued. The ESPP is administered by a committee of the Board.

During the three months ended March 31, 2021, the Company recorded stock-based compensation expense of $130 related to the ESPP. There were no shares of Class A common stock purchased under the ESPP during the three months ended March 31, 2021 as the current offering period does not end until May 31, 2021. As of March 31, 2021,  there was approximately $88 of unrecognized ESPP stock-based compensation cost that is expected to be recognized on a straight-line basis over the remaining term of the current offering period.

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The fair value of ESPP purchase rights is comprised of the value of the 15% ESPP discount and the value associated with the Call/Put over the ESPP offering period. The value of the Call/Put for the current offering period (December 1, 2020 – May 31, 2021) was estimated using the Black-Scholes model with the following assumptions:

	Current
	Offering Period
Fair market value of common stock	$	25.83
Volatility		35.00	%
Expected term (years)		0.50
Expected dividend yield		-	%
Risk-free interest rate		0.11	%

The Company lacks sufficient historical data on the volatility of its stock price. Selected volatility is representative of expected future volatility and was based on the historical and implied volatility of comparable publicly traded companies over a similar expected term. The expected term represents the term of the ESPP offering period, which is generally six months. The Company does not expect to pay dividends after the Offering. The risk-free interest rate was based on the rate for a U.S. Treasury zero-coupon issue with a term that closely approximates the expected term of the award at the date nearest the offering term.

Stock-Based Compensation

The Company recognized total stock-based compensation cost related to incentive awards as follows:

	March 31,
	2021		2020
Stock-based compensation expense:
SARs and Converted SARs	$	3,391	$	34,920
Stock options		377		-
RSUs		436		-
RSAs		2,209		-
ESPP		130		-
Total stock-based compensation expense	$	6,543	$	34,920

The Company recognized stock-based compensation cost in the condensed consolidated statements of comprehensive income (loss) as follows:

	March 31,
	2021		2020
Stock-based compensation expense:
Cost of revenues, software subscriptions	$	560	$	3,492
Cost of revenues, services		594		5,238
Research and development		561		3,492
Selling and marketing		1,287		6,984
General and administrative		3,541		15,714
Total stock-based compensation expense	$	6,543	$	34,920

13.   LEGAL PROCEEDINGS

The Company may become involved in various lawsuits and legal proceedings, which arise, in the ordinary course of business. However, litigation is subject to inherent uncertainties, and an adverse result in these or other matters may arise from time to time that may harm the Company’s business. The Company is not aware of any such legal proceedings or claims that management believes will have a material adverse effect on its business, financial condition, or operating results.

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14.   SUBSEQUENT EVENTS

On May 12, 2021, the Company acquired EVAT Solutions Limited and its subsidiaries, doing business as Taxamo (collectively “Taxamo”), a cloud-based pioneer in tax and payment automation for global e-commerce and marketplaces for approximately $200,000 in cash on hand. The acquisition supports and accelerates the Company’s growth strategies across ecommerce platforms and marketplaces in the enterprise and mid-market in Europe and North America, and among its existing global customers. The Company’s accounting for the Taxamo acquisition, including whether it constitutes an asset or business purchase, is preliminary.

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Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

You should read the following discussion and analysis of our financial condition and results of operations in conjunction with the condensed consolidated financial statements and the notes thereto included elsewhere in this Quarterly Report on Form 10-Q. In addition to historical financial information, the following discussion contains forward-looking statements that reflect our plans, estimates, beliefs and expectations that involve risks and uncertainties. Our actual results and the timing of events could differ materially from those discussed in the forward-looking statements. Factors that could cause or contribute to these differences include those discussed below and elsewhere in this Quarterly Report on Form 10-Q, particularly in the section titled “Special Note Regarding Forward-Looking Statements” above.

Overview

Vertex is a leading global provider of indirect tax software and solutions. Our mission is to deliver the most trusted tax technology enabling global businesses to transact, comply and grow with confidence. Vertex provides cloud-based and on-premise solutions that can be tailored to specific industries for every major line of indirect tax, including sales and consumer use, value added and payroll. Headquartered in North America, and with offices in South America and Europe, Vertex employs over 1,200 professionals and serves companies across the globe.

We have pioneered tax technology for over 40 years. We first began electronic delivery of tax rules in the early 1980s and we first sold transaction tax processing software in 1982. Today, our software enables tax determination, compliance and reporting, tax data management and document management with powerful pre-built integrations to core business applications used by most companies, particularly those applications that have a significant impact on global commerce. Our software is fueled by over 300 million data-driven effective tax rules and supports indirect tax compliance in more than 19,000 jurisdictions worldwide. In order to maintain the quality of our content, our team includes many global tax and regulatory experts from industry and the public sector, who deliver monthly updates to our tax content, which are then incorporated directly into our software. Our solutions can be deployed on-premise, in the cloud, or both, with implementation services available to enable optimal customer outcomes and satisfy their unique business requirements.

We have accumulated industry-specific tax knowledge for over four decades and our customers leverage our in-depth content through their use of our software. This allows our customers to comply with the dynamic regulatory landscape in real time and mitigates our customers’ risk exposure. As our customers expand their global footprint and business models, we are actively supporting their expansion by continuously strengthening our content offering and allowing for additional jurisdiction-specific tax compliance.

We derive the majority of our revenue from software subscriptions. These subscriptions include use of our software and ongoing monthly content updates. Our software is offered on a subscription basis to our customers, regardless of their deployment preferences. On-premise subscriptions are typically sold through one-year contracts and cloud-based subscriptions are typically sold through one- to three-year contracts. We bill almost all of our customers annually in advance of the subscription period.

Our customers include a majority of the Fortune 500, as well as a majority of the top 10 companies by revenue in multiple industries such as retail, technology and manufacturing, in addition to leading marketplaces. As our customers expand geographically and pursue omnichannel business models, their tax determination and compliance requirements increase and become more complex, providing sustainable organic growth opportunities for our business. Our flexible, tiered transaction-based pricing model also results in our customers growing their spend with us as they grow and continue to use our solutions. We principally price our solutions based on a customer’s revenue base, in addition to a number of other factors.

We employ a hybrid deployment model to align to our customers’ technology preferences for their core financial management software across on premise, cloud deployments or any combination of these models. Over time, we expect both existing and newly acquired customers to continue to shift towards cloud deployment models. Cloud-based subscription sales to new customers have grown at a significantly faster rate than on-premise software subscription sales, which is a trend that we expect to continue over time. We generated 32.3% and 25.1% of software subscription revenue

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from cloud-based subscriptions during the three months ended March 31, 2021 and 2020, respectively. While our on-premise software subscription revenue comprises 67.7% of our 2021 software subscription revenue, it continues to decrease as a percentage of total software subscription revenue as cloud-based subscriptions accelerate.

We license our solutions primarily through our direct sales force, which focuses on selling to qualified leads provided by our marketing efforts, and through our network of referral partners. We also utilize indirect sales to a lesser extent to efficiently grow and scale our enterprise and mid-market revenues.

Our partner ecosystem is a differentiating, competitive strength in both our software development and our sales and marketing activities. We integrate with key technology partners that span ERP, CRM, procurement, billing, POS and eCommerce. These partners include Adobe/Magento, Coupa, Microsoft Dynamics, NetSuite, Oracle, Salesforce, SAP, SAP Ariba, Workday and Zuora. We also collaborate with numerous accounting firms who have built implementation practices around our software to serve their customer base.

We believe that global commerce and the compliance environment provides durable and accelerating growth opportunities for our business. We generated revenue of $98.2 million and $89.2 million for the three months ended March 31, 2021 and 2020, respectively. We had net income of $2.3 million and a net loss of $29.1 million for the three months ended March 31, 2021 and 2020, respectively. Adjusted EBITDA was $18.2 million and $15.3 million for the three months ended March 31, 2021 and 2020, respectively. Adjusted EBITDA is a non-GAAP financial measure. Refer to “Use and Reconciliation of Non-GAAP Financial Measures” for further discussion of non-GAAP financial measures and their comparison to GAAP financial measures.

Recent Developments

Taxamo Acquisition

On May 12, 2021, we acquired EVAT Solutions Limited and its subsidiaries, doing business as Taxamo (collectively “Taxamo”), a cloud-based pioneer in tax and payment automation for global e-commerce and marketplaces for approximately $200.0 million in cash on hand. This acquisition supports and accelerates our growth strategies across ecommerce platforms and marketplaces in the enterprise and mid-market in Europe and North America, and among our existing global customers.

Impact of COVID-19

During 2020, the COVID-19 pandemic had minimal impact on our revenues and results of operations, as we continue to derive the significant majority of our revenues from our existing software subscriptions. As we principally price our solutions based on our customers’ revenues within certain revenue bands, elongated declines in our existing customers’ revenues may impact our ability to grow our existing customer revenues. We did not experience an abnormal number of non-renewals in 2020, nor any material declines in revenues associated with declines in our customers’ revenues, and we currently expect our existing customer base to remain largely stable, as it did through the recession in 2008 and 2009. However, significant increases in non-renewals or concessions to renewal customers would have a material impact on our revenues and cash flows. During 2020, we did see some delays in signing deals due to prospects shifting to working remotely, and some due to economic uncertainty. We expect that the uncertainty caused by the COVID-19 pandemic could impact our billings to new customers beyond 2020 as the pandemic continues to generate economic uncertainty, and it may also negatively impact our efforts to maintain or expand revenues from our existing customers as they continue to evaluate certain long-term projects and budget constraints. However, we do not anticipate that overall demand for our software and solutions, our ability to deliver such software and solutions, or our growth strategies will be materially impacted by the COVID-19 pandemic, as companies continue to rely on us for their indirect tax solutions.

Our cash collections for the year were consistent with our expectations as some of the procedural disruptions that customers experienced as they shifted to remote work early in the year stabilized by the end of 2020. We believe that we may see delays in collections in 2021 as the pandemic continues to generate economic uncertainty. However, we do not believe that these delays will materially impact our business; we continue to expect that we will be able to collect amounts due under subscription contracts from customers experiencing issues as a result of the COVID-19 pandemic, and we have

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not recorded additional credit losses associated with the allowance for doubtful accounts in connection with any delays. Given that customers cannot forgo our monthly content updates, which are necessary to remain compliant with the most current regulations, we believe customers will continue to pay our renewal invoices in a timely, even if slightly elongated, manner. We believe that we currently have ample liquidity and capital resources to continue to meet our operating needs, and our ability to continue to service our debt or other financial obligations is not currently impaired. For a further description of our liquidity, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources.”

The extent to which the COVID-19 pandemic impacts our business going forward will depend on numerous evolving factors that cannot reliably be predicted, including the duration and scope of the pandemic; governmental, business, and individuals’ actions in response to the pandemic; and the impact on economic activity, including the possibility of recession or financial market instability. These factors may adversely impact consumer, business and government spending on technology as well as customers’ ability to pay for our products and services on an ongoing basis. This uncertainty also affects management’s accounting estimates and assumptions, which could result in greater variability in a variety of areas that depend on these estimates and assumptions, including estimated allowance for subscription cancellations, product life cycles and estimated useful lives and potential impairment of long-lived assets, intangible assets and goodwill.

Key Business Metrics

We regularly review the metrics identified below to evaluate growth trends, measure our performance, formulate financial projections and make strategic decisions.

Annual Recurring Revenue.

We derive the vast majority of our revenue from recurring software subscriptions. We believe Annual Recurring Revenue (“ARR”) provides us with visibility to our projected software subscription revenue in order to evaluate the health of our business. Because we recognize subscription revenue ratably, we believe investors can use ARR to measure our expansion of existing customer revenues, new customer activity, and as an indicator of future software subscription revenues. ARR is based on monthly recurring revenue (“MRR”) from software subscriptions for the most recent month at period end, multiplied by twelve. MRR is calculated by dividing the software subscription price, inclusive of discounts, by the number of subscription covered months. MRR only includes customers with MRR at the end of the last month of the measurement period.

	Three months ended
	March 31,
(Dollars in millions)	2021		2020		Year-Over-Year Change
Annual Recurring Revenue	$	320.1	$	284.2	$	35.9	12.6	%

ARR increased by $35.9 million or 12.6% for the three months ended March 31, 2021, as compared to the same period in 2020. The increase was primarily driven by $14.7 million of growth in revenues from existing customers through their expanded use of our solutions as well as price increases and $21.2 million of on-premise and cloud-based subscriptions of our tax solutions to new customers.

Net Revenue Retention Rate.

We believe that our Net Revenue Retention Rate (“NRR”) provides insight into our ability to retain and grow revenue from our customers, as well as their potential long-term value to us. We also believe it demonstrates to investors our ability to expand existing customer revenues, which is one of our key growth strategies. Our NRR refers to the ARR expansion during the 12 months of a reporting period for all customers who were part of our customer base at the beginning of the reporting period. Our NRR calculation takes into account any revenue lost from departing customers or customers who have downgraded or reduced usage, as well as any revenue expansion from migrations, new licenses for additional products or contractual and usage-based price changes.

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	Three months ended
	March 31,
	2021		2020
Net Revenue Retention Rate	105	%	109	%

The 400 basis point decline in NRR from 109% for the three months ended March 31, 2020 to 105% for the same period in 2021 was primarily attributable to a reduction in sales growth to existing customers as compared to the prior year related to delays in signing deals due to their focus shifting to working remotely, and economic uncertainty in connection with the impact of the COVID-19 pandemic on their businesses.

Adjusted EBITDA and Adjusted EBITDA Margin.

We believe that Adjusted EBITDA is a measure widely used by securities analysts and investors to evaluate the financial performance of our company and other companies. We believe that Adjusted EBITDA and Adjusted EBITDA margin are useful as supplemental measures to evaluate our overall operating performance as they measure business performance focusing on cash related charges and because they are important metrics to lenders under our New Credit Agreement. We define Adjusted EBITDA as net income or loss before interest, taxes, depreciation, and amortization, as adjusted to exclude charges for asset impairments, stock-based compensation expense, severance expense and transaction costs. Adjusted EBITDA margin represents Adjusted EBITDA divided by total revenues for the same period. For purposes of comparison, our net income (loss) was $2.3 million and $(29.1) million for the three months ended March 31, 2021 and 2020, respectively, while our net income margin was 2.3% and (32.6%) over the same periods, respectively.

	Three months ended
	March 31
(Dollars in thousands)	2021			2020
Adjusted EBITDA:
Net income (loss)	$	2,288		$	(29,064)
Interest expense, net		535			569
Income tax (benefit) expense		(679)			250
Depreciation and amortization - property and equipment		2,827			2,869
Depreciation and amortization of capitalized software and acquired intangible assets - cost of subscription revenues		5,905			4,567
Amortization of acquired intangible assets - selling and marketing expense		84			—
Stock-based compensation expense		6,543			34,920
Severance expense		531			1,183
Transaction costs		150			—
Adjusted EBITDA	$	18,184		$	15,294
Adjusted EBITDA Margin:
Total revenues	$	98,236		$	89,245
Adjusted EBITDA margin		18.5	%		17.1	%

The increase in Adjusted EBITDA for the three months ended March 31, 2021 of $2.9 million over the comparable period in 2020 is primarily driven by an increase in net income of $31.4 million, offset by the decrease in stock-based compensation of $28.4 million. Adjusted EBITDA margin increased to 18.5% for the three months ended March 31, 2021 compared to 17.1% for the comparable period in 2020.

Free Cash Flow and Free Cash Flow Margin.

We use free cash flow as a critical measure in the evaluation of liquidity in conjunction with related GAAP amounts. We also use this measure when considering available cash, including for decision making purposes related to dividends and discretionary investments. We consider free cash flow to be an important measure for investors because it measures the amount of cash we generate from our operations after our capital expenditures and capitalization of software

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development costs. In addition, we base certain of our forward-looking estimates and budgets on free cash flow and free cash flow margin. We define free cash flow as the total of net cash provided by operating activities, adjusted for the redemption of stock appreciation rights (“SARs”) in 2020 in connection with our initial public offering (the “Offering”) reflected as a reduction of cash provided by operating activities, less purchases of property and equipment and capitalized software. We define free cash flow margin as free cash flow divided by total revenues for the same period. Our net cash used in operating activities was $(3.0) million and $(6.4) million for the three months ended March 31, 2021 and 2020, respectively, while our operating cash flow margin was (3.0%) and (7.2%) over the same periods, respectively. Net cash used in investing activities was $(14.5) million and $(21.7) million for the three months ended March 31, 2021 and 2020, respectively. Net cash (used in) provided by financing activities was $(8.1) million and $103.7 million for the three months ended March 31, 2021 and March 31, 2020, respectively.

	Three months ended
	March 31,
(Dollars in thousands)	2021			2020
Free Cash Flow:
Cash used in operating activities	$	(2,965)		$	(6,417)
Property and equipment additions		(6,195)			(5,632)
Capitalized software additions		(2,221)			(3,706)
Free cash flow	$	(11,381)		$	(15,755)
Free Cash Flow Margin:
Total revenues	$	98,236		$	89,245
Free cash flow margin		(11.6)	%		(17.7)	%

Free cash flow increased by $4.4 million for the three months ended March 31, 2021 as compared to the same period in 2020.  This increase was primarily driven by an increase in net income of $31.4 million, offset by the decrease in stock-based compensation of $28.4 million. Historically, our cash flows in the first quarter are lower than the remaining calendar quarters as they are heavily influenced by annual employee bonus and other variable compensation payments.

Components of Our Results of Operations

Revenue

We generate revenue from software subscriptions and services.

Revenue is recognized upon transfer of control of promised products or services to customers in an amount that reflects the consideration expected to be received in exchange for those products or services. We enter into contracts that include various combinations of products and services, which are generally capable of being distinct and accounted for as separate performance obligations. Revenue is recognized net of allowance for subscription and non-renewal cancellations and any taxes collected from customers that are subsequently remitted to governmental authorities.

Software Subscriptions

Licenses for on-premise software subscriptions, which are generally one year, provide the customer with a right to use the software as it exists when made available to the customer. Customers purchase a subscription to these licenses, which includes the related software and tax content updates and product support. The updates and support, which are part of the subscription agreement, are essential to the continued utility of the software; therefore, we have determined the software and the related updates and support to be a single performance obligation. Accordingly, when on-premise software is licensed, the revenue associated with this combined performance obligation is recognized ratably over the license term as these subscriptions are provided for the duration of the license term. Revenue recognition begins on the later of the beginning of the subscription period or the date the software is made available to the customer to download. Our on-premise software subscription prices in the initial subscription year are higher than standard renewal prices. The excess initial year price over the renewal price is a material right that provides customers with the right to this reduced

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renewal price. We recognize revenue associated with this material right over the estimated period of benefit to the customer, which is generally three years.

Our cloud-based subscriptions allow customers to use Vertex-hosted software over the contract period without taking possession of the software. The contracts are generally for one to three years and are generally billed annually in advance of the subscription period. Our cloud-based offerings also include related updates and support. All services within the cloud-based contracts consistently provide a benefit to the customer during the subscription period, thus the associated revenue is recognized ratably over the subscription period. Revenue recognition begins on the later of the beginning of the subscription period or the date the customer is provided access to the cloud-based solutions.

Revenue is impacted by the timing of sales and our customers’ growth or contractions resulting in their need to expand or contract their subscription usage, the purchase of new solutions or the non-renewal of existing solutions. In addition, revenue will fluctuate with the cessation of extended product support fees charged for older versions of our software subscription solutions when they are retired and these fees are no longer charged. Contracts for on-premise licenses permit cancellations at the end of the license term, which is generally one year. Legacy cloud-based subscription contracts for multi-year periods previously provided customers the right to terminate their contract for services prior to the end of the subscription period at a significant penalty. This penalty requires the payment of a percentage of the remaining months of the then current contract term. Current cloud-based contracts do not contain such termination rights. Terminations of cloud-based subscriptions prior to the end of the subscription term have occurred infrequently and the impact has been immaterial. The allowance for subscription and non-renewal cancellations reflects an estimate of the amount of such cancellations and non-renewals based on past experience, current information and forward-looking economic considerations.

Services Revenue

We generate services revenue primarily in support of our customers’ needs associated with our software and to enable them to realize the full benefit of our solutions. These software subscription-related services include configuration, data migration and implementation, and premium support and training. In addition, we generate services revenue through our managed services offering which allows customers to outsource all or a portion of their indirect tax operations to us. These services include indirect tax return preparation, filing and tax payment and notice management. We generally bill for services on a per-transaction or time and materials basis, and we recognize revenue from deliverable-based professional services as services are performed.

Fluctuations in services revenue are directly correlated to fluctuations in our subscription revenues with respect to implementation and training services as we have historically experienced an attachment rate to subscription sales for these services in excess of 60%. However, demand for services in 2020 exceeded historical levels as certain customers migrated to a newer version of the software which is not expected to be a significant driver of our services revenues growth in 2021. In addition, our managed services offering has continued to experience increased revenues associated with returns processing volume increases attributable to regulatory changes, as customers expanded their tax filings into more jurisdictions.

Cost of Revenue

Software Subscriptions

Cost of software subscriptions revenue consists of costs related to providing and supporting our software subscriptions and includes personnel and related expenses, including salaries, benefits, bonuses and stock-based compensation. In addition, cost of revenue includes direct costs associated with information technology, such as data center and software hosting costs, and tax content maintenance. Cost of revenue also includes amortization associated with direct labor and related expenses for capitalized internal-use software for cloud-based subscription solutions and software developed for sale for new products and enhancements to existing products, and costs associated with the amortization of acquired intangible assets.  We plan to continue to significantly expand our infrastructure and personnel to support our future growth and increases in transaction volumes of our cloud-based solutions, including through acquisitions. We expect growth in our business will result in an increase in cost of revenue in absolute dollars.

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Services

Cost of services revenue consists of direct costs of software subscription-related services and our managed services offering. These costs include personnel and related expenses, including salaries, benefits, bonuses, stock-based compensation and the cost of third-party contractors and other direct expenses. We plan to continue to expand our infrastructure and personnel as necessary to support our future growth and related increases in our service revenue. We expect growth in our business will result in an increase in the cost of services revenue in absolute dollars, but may decrease as a percentage of revenues as we scale our operations.

Research and Development

Research and development expenses consist primarily of personnel and related expenses for our research and development activities, including salaries, benefits, bonuses and stock-based compensation, and the cost of third-party developers and other contractors. Research and development costs, other than software development expenses qualifying for capitalization, are expensed as incurred. For the three months ended March 31, 2021 and 2020, $2.2 million and $3.7 million of software development costs were capitalized, respectively. Capitalized software development costs consist primarily of employee-related and third-party labor costs.

We devote substantial resources to developing new products and enhancing existing products, conducting quality assurance testing and improving our core technology. We believe continued investments in research and development are critical to attain our strategic objectives and expect research and development costs to increase in absolute dollars. These investments include enhancing our solution offerings to address changing customer needs to support their growth, as well as implementing changes required to keep pace with our partners’ technology to ensure the continued ability of our solutions to work together and deliver value to our customers. The market for our solutions is characterized by rapid technological change, frequent new product and service introductions and enhancements, changing customer demands and evolving industry standards. As a result, although we are making significant research and development expenditures, which may be incurred and certain of which may be capitalized, there is no guarantee these solutions will be accepted by the market. This could result in increased costs or an impairment of capitalized development costs with no resulting future revenue benefit.

Selling and Marketing Expenses

Selling expenses consist primarily of personnel and related expenses in support of sales and marketing efforts. These costs include salaries, benefits, bonuses and stock-based compensation. In addition, selling expense includes costs related to advertising and promotion efforts, branding costs, partner-based commissions, costs associated with our annual customer conferences and amortization of certain acquired intangible assets. We intend to continue to invest in our sales and marketing capabilities in the future to continue to increase our brand awareness and expect these costs to increase on an absolute dollar basis as we grow our business and continue to expand our market and partner ecosystem penetration. Sales and marketing expense in absolute dollars and as a percentage of total revenue may fluctuate from period-to-period based on total revenue levels and the timing of our investments in our sales and marketing functions as these investments may vary in scope and scale over future periods. In addition, travel restrictions due to COVID-19 continue to result in reductions in travel and external marketing events. These costs are expected to increase once travel and conference restrictions are lifted, although it is uncertain whether they will return to their historical levels experienced pre-COVID-19.

General and Administrative

General and administrative expenses consist primarily of personnel and related expenses for administrative, finance, information technology, legal, risk management, facilities and human resources staffing, including salaries, benefits, bonuses, severance, stock-based compensation, professional fees, insurance premiums, facility costs and other internal support costs.

We expect our general and administrative expenses to increase in absolute dollars as we continue to expand our operations, hire additional personnel, integrate future acquisitions and incur additional costs associated with becoming a

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publicly listed company. As a public company, we expect to incur increased expenses related to accounting, tax and auditing activities, legal, insurance, SEC compliance and internal control compliance, including the design, implementation and testing of increasingly formalized systems of internal control over financial reporting.

Depreciation and Amortization

Depreciation and amortization expense consists of the allocation of purchased and developed asset costs over the future periods benefitted by the use of these assets. These assets include leasehold improvements for our facilities, computers and equipment needed to support our customers and our internal infrastructure and capitalized internal-use software associated with our internal infrastructure and tools. Depreciation and amortization will fluctuate in correlation with our ongoing investment in internal infrastructure costs to support our growth.

Interest Expense, net

Interest expense, net reflects the amount of our interest expense that exceeds interest income over the same period.

Interest expense consists primarily of interest payments and other financing costs on our bank credit facility. Interest expense includes amortization of deferred financing fees over the term of the credit facility or  write-downs of such costs upon redemption of debt. Interest expense will vary as a result of fluctuations in the level of debt outstanding as well as interest rates on such debt. In addition, interest expense will include adjustments to the fair value of contracts that may be entered into to hedge risks associated with currency fluctuations for cash receipts or cash payments denominated in currencies other than U.S. dollars and which do not qualify for hedge accounting. In addition, changes in the settlement value of the future payment obligation for the Systax Sistemas Fiscais Limited (“Systax”) acquisition will be recorded as interest expense.

Interest income reflects earnings on investments of our cash on hand and on funds held for customers related to our managed outsourcing services. Interest income will vary as a result of fluctuations in the future level of funds available for investment and the rate of return available in the market on such funds.

Provision for Income Taxes

Prior to July 27, 2020, Vertex was taxed as an S-corporation for U.S. federal and certain state income tax purposes. As a result, net income or loss prior to this date has been allocated to and included on the income tax returns of the S-Corporation stockholders. Vertex was taxed at the corporate level in certain states where the S-Corporation status was not recognized or where the state imposed a tax on S-Corporations. Accordingly, the income tax provision or benefit for such periods was based on taxable income allocated to those states. In certain foreign jurisdictions, our subsidiaries were taxed at the corporate level, and the income tax provision or benefit is based on taxable income sourced to these foreign jurisdictions.

Effective as of July 27, 2020, Vertex converted to a C-Corporation, which resulted in our net income being taxed at the corporate level. As such, our provision for income taxes has increased since we are now subject to U.S. federal and state corporate income taxes.

Results of Operations

You should read the following discussion and analysis of our financial condition and results of operations in conjunction with our condensed consolidated financial statements and the notes thereto included elsewhere in this Quarterly Report on Form 10-Q, our consolidated financial statements and the notes with our Annual Report on Form 10-K filed with the SEC on March 15, 2021, and our Prospectus filed with the SEC on July 30, 2020. The period-to-period comparison of financial results is not necessarily indicative of financial results to be achieved in future periods.

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The following table sets forth our consolidated statements of comprehensive income (loss) for the periods indicated.

	Three months ended
	March 31,
(Dollars in thousands)	2021		2020		Period-Over-Period Change
Revenues:
Software subscriptions	$	83,280	$	75,760	$	7,520	9.9	%
Services		14,956		13,485		1,471	10.9	%
Total revenues		98,236		89,245		8,991	10.1	%
Cost of revenues:
Software subscriptions(1)		25,590		24,684		906	3.7	%
Services(1)		11,343		14,778		(3,435)	(23.2)	%
Total cost of revenues		36,933		39,462		(2,529)	(6.4)	%
Gross profit		61,303		49,783		11,520	23.1	%
Operating expenses:
Research and development(1)		11,459		13,079		(1,620)	(12.4)	%
Selling and marketing(1)		20,150		24,333		(4,183)	(17.2)	%
General and administrative(1)		24,852		37,636		(12,784)	(34.0)	%
Depreciation and amortization		2,827		2,869		(42)	(1.5)	%
Other operating (income) expense, net		(129)		111		(240)	(216.2)	%
Total operating expenses		59,159		78,028		(18,869)	(24.2)	%
Income (loss) from operations		2,144		(28,245)		30,389	107.6	%
Interest expense, net		535		569		(34)	(6.0)	%
Income (loss) before income taxes		1,609		(28,814)		30,423	105.6	%
Income tax (benefit) expense		(679)		250		(929)	(371.6)	%
Net income (loss)		2,288		(29,064)		31,352	107.9	%
Other comprehensive loss from foreign currency translations and revaluations, net of tax		977		2,998		(2,021)	(67.4)	%
Total comprehensive income (loss)	$	1,311	$	(32,062)	$	33,373	104.1	%

(1) Includes stock-based compensation expenses as follows in the table below.

	Three months ended
	March 31
(In thousands)	2021		2020
Stock-based compensation expense:
Cost of revenues, software subscriptions	$	560	$	3,492
Cost of revenues, services		594		5,238
Research and development		561		3,492
Selling and marketing		1,287		6,984
General and administrative		3,541		15,714
Total stock-based compensation expense	$	6,543	$	34,920

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The following table sets forth our results of operations as a percentage of our total revenue for the periods presented.

	Three months ended
	March 31
	2021		2020
Revenues:
Software subscriptions	84.8	%	84.9	%
Services	15.2	%	15.1	%
Total revenues	100.0	%	100.0	%
Cost of Revenues:
Software subscriptions	26.0	%	27.7	%
Services	11.5	%	16.6	%
Total cost of revenues	37.5	%	44.3	%
Gross profit	62.5	%	55.7	%
Operating expenses:
Research and development	11.7	%	14.7	%
Selling and marketing	20.5	%	27.3	%
General and administrative	25.3	%	42.2	%
Depreciation and amortization	2.9	%	3.2	%
Other operating (income) expense, net	(0.1)	%	0.1	%
Total operating expenses	60.3	%	87.5	%
Income (loss) from operations	2.2	%	(31.8)	%
Interest expense, net	0.5	%	0.6	%
Income (loss) before income taxes	1.7	%	(32.4)	%
Income tax (benefit) expense	(0.7)	%	0.3	%
Net income (loss)	2.4	%	(32.7)	%
Other comprehensive loss from foreign currency translations, net of tax	1.0	%	3.4	%
Total comprehensive income (loss)	1.4	%	(36.1)	%

Three Months Ended March 31, 2021 Compared to Three Months Ended March 31, 2020

Revenue

	Three months ended
	March 31,
(Dollars in thousands)	2021		2020		Period-over-Period change
Revenues:
Software subscriptions	$	83,280	$	75,760	$	7,520	9.9	%
Services		14,956		13,485		1,471	10.9	%
Total revenues	$	98,236	$	89,245	$	8,991	10.1	%

Revenue increased $9.0 million, or 10.1%, to $98.2 million for the three months ended March 31, 2021 compared to $89.2 million for the three months ended March 31, 2020. The increase in software subscriptions revenue of $7.5 million, or 9.9%, was primarily driven by and increase of $7.3 million in revenues derived from our existing customers and a year over year increase of $0.2 million in revenues derived from new customers. Software subscriptions revenue derived from new customers averaged 7.5% of total software subscriptions revenue in both periods.

The $1.5 million increase in services revenue is primarily driven by an increase of $1.0 million in software subscription related services associated with the growth in subscription revenues, which includes new customers implementing our solutions and existing customers upgrading to newer versions of our solutions. In addition, our managed services offering experienced a $0.5 million increase in recurring services revenue over the prior year due to returns processing volume increases related to regulatory changes as customers expanded their tax filings into more jurisdictions.

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Cost of Software Subscriptions Revenue

	Three months ended
	March 31,
(Dollars in thousands)	2021		2020		Period-over-Period change
Cost of software subscription revenues	$	25,590	$	24,684	$	906	3.7	%

Cost of software subscriptions revenue increased $0.9 million, or 3.7%, to $25.6 million for the three months ended March 31, 2021 compared to $24.7 million for the three months ended March 31, 2020. This is primarily driven by a $3.8 million increase in costs of personnel supporting year-over-year growth of sales and customers and ongoing infrastructure investments to support expansion of customer transaction volumes for our cloud-based subscription customers. This increase is partially offset by a $2.9 million decrease in stock-based compensation for the three months ended March 31, 2021 over the same period in 2020. As a percentage of total revenue, the cost of software subscriptions revenue decreased to 26.0% for the three months ended March 31, 2021 compared to 27.7% for the same period in 2020. After excluding stock-based compensation expense, as a percentage of total revenue, cost of software subscriptions revenue increased to 25.5% in 2021 compared to 23.7% in 2020.

Cost of Services Revenue

	Three months ended
	March 31,
(Dollars in thousands)	2021		2020		Period-over-Period change
Cost of services revenuess	$	11,343	$	14,778	$	(3,435)	(23.2)	%

Cost of services revenue decreased $3.4 million, or 23.2%, to $11.3 million for the three months ended March 31, 2021 compared to $14.8 million for the three months ended March 31, 2020. This decline is primarily driven by a stock-based compensation decrease of $4.6 million for the three months ended March 31, 2021 over the same period in 2020. After adjusting for the decline in stock-based compensation expense, cost of services revenue is increasing $1.2 million primarily driven by an increase in costs of personnel supporting the service delivery areas to support revenue growth in software subscription related services and our managed services offering. As a percentage of total revenue, cost of services revenue decreased to 11.5% in 2021 compared to 16.6% for the same period in 2020. After excluding stock-based compensation expense, as a percentage of total revenue, cost of services revenue increased to 10.9% in 2021 compared to 10.7% in 2020.

Research and Development

	Three months ended
	March 31,
(Dollars in thousands)	2021		2020		Period-over-Period change
Research and development	$	11,459	$	13,079	$	(1,620)	(12.4)	%

Research and development expenses decreased $1.6 million, or 12.4%, to $11.5 million for the three months ended March 31, 2021 compared to $13.1 million for the three months ended March 31, 2020. However, this decline is primarily driven by a stock-based compensation decrease of $2.9 million for the three months ended March 31, 2021 over the same period in 2020. After adjusting for the decline in stock-based compensation expense, research and development expenses are increasing $1.3 million primarily driven by an increase in costs associated with increased development activity associated with nascent technologies and new solutions to address end-to-end data analysis and compliance needs of our customers. As a percentage of total revenue, research and development expenses decreased to 11.7% for the three months ended March 31, 2021 compared to 14.7% for the three months ended March 31, 2020. After excluding stock-based compensation expense, as a percentage of total revenue, research and development expenses increased to 11.1% in 2021 compared to 10.7% in 2020.

Research and development expense excludes those costs that have been capitalized for solutions that have met our capitalization policy.

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Selling and Marketing

	Three months ended
	March 31,
(Dollars in thousands)	2021		2020		Period-over-Period change
Selling and marketing	$	20,150	$	24,333	$	(4,183)	(17.2)	%

Selling and marketing expenses decreased $4.2 million, or 17.2%, to $20.2 million for the three months ended March 31, 2021 compared to $24.3 million for the same period in 2020. However, this decline is primarily driven by a stock-based compensation decrease of $5.7 million for the three months ended March 31, 2021 over the same period in 2020. After adjusting for the decline in stock-based compensation expense, selling and marketing expenses are increasing $1.5 million primarily driven by an increase in payroll and related expenses associated with the growth in year-over-year subscription sales and services revenue and expansion of our partner and channel management programs. As a percentage of total revenue, selling and marketing expenses decreased to 20.5% for the three months ended March 31, 2021 compared to 27.3% for the same period in 2020. After excluding stock-based compensation expense, as a percentage of total revenue, selling and marketing expenses decreased to 19.2% in 2021 compared to 19.4% in 2020.

General and Administrative

	Three months ended
	March 31,
(Dollars in thousands)	2021		2020		Period-over-Period change
General and administrative	$	24,852	$	37,636	$	(12,784)	(34.0)	%

General and administrative expenses decreased $12.8 million, or 34.0%, to $24.9 million for the three months ended March 31, 2021 compared to $37.6 million for the same period in 2020. However, this decline is primarily driven by a stock-based compensation decrease of $12.2 million for the three months ended March 31, 2021 over the same period in 2020. After adjusting for the decline in stock-based compensation expense, general and administrative expenses are decreasing an additional $0.6 million primarily driven by a decrease in travel costs due to COVID-19 travel restrictions and an increase in capitalized costs associated with internal optimization efforts, partially offset by increased costs associated with public company status. As a percentage of total revenue, general and administrative expenses decreased to 25.3% for the three months ended March 31, 2021 compared to 42.2% for the same period in 2020. After excluding stock-based compensation expense, as a percentage of total revenue, general and administrative expenses decreased to 21.7% in 2021 compared to 24.6% in 2020.

Provision for Taxes

	Three months ended
	March 31,
(Dollars in thousands)	2021		2020		Period-over-Period change
Income tax (benefit) expense	$	(679)	$	250	$	(929)	(371.6)	%

Income tax expense decreased $0.9 million, or 371.6%, to $(0.7) million of income tax benefit for the three months ended March 31, 2021 compared to $0.3 million of income tax expense for the same period in 2020. The decrease was primarily due to a pretax loss resulting from an increase in stock-based compensation in 2020 compared to the benefit for U.S. federal and state income taxes in 2021 now that we are taxed as a C-Corporation.  The income tax benefit in the three months ended March 31, 2021 is primarily driven by exercises of stock options partially offset by the unfavorable impact of limitations on deductions of certain employees’ compensation under Internal Revenue Code Section 162(m).

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Liquidity and Capital Resources

As of March 31, 2021, we had cash and cash equivalents of $277.7 million and retained earnings of $24.7 million. Our primary sources of capital to date have been from sales of our solutions, and proceeds from bank lending facilities. In addition, on July 31, 2020, we received $423.0 million in proceeds from the Offering, net of underwriting fees and commissions, from the sale of 23,812,216 shares of Class A common stock and used a portion of the proceeds to pay off the $175.0 million term loan under the bank credit agreement. As a result, we have no outstanding bank debt after such redemption and at March 31, 2021. The net proceeds remaining after payment of Offering costs will be used for working capital and other corporate purposes as described in the Prospectus.

On May 12, 2021, we used approximately $200.0 million of our cash and cash equivalents to acquire Taxamo, a cloud-based pioneer in tax and payment automation for global e-commerce and marketplaces.

We believe that our existing cash resources and our bank line of credit will be sufficient to meet our capital requirements and fund our operations for at least the next 12 months. However, if these sources are insufficient to satisfy our liquidity requirements, we may seek to sell additional equity or debt securities. If we raise additional funds by issuing equity securities, our stockholders would experience dilution. Debt financing, if available, may involve covenants restricting our operations or our ability to incur additional debt. Any debt financing or additional equity that we raise may contain terms that are not favorable to us or our stockholders. Additional financing may not be available at all, or in amounts or on terms unacceptable to us.

The following table presents a summary of our cash flows for the periods indicated:

	Three months ended
	March 31,
(Dollars in thousands)	2021		2020		Period-Over-Period Change
Net cash used in operating activities	$	(2,965)	$	(6,417)	$	3,452	(53.8)	%
Net cash used in investing activities		(14,516)		(21,656)		7,140	(33.0)	%
Net cash (used in) provided by financing activities		(8,140)		103,654		(111,794)	(107.9)	%
Effect of foreign exchange rate changes		(226)		(249)		23	(9.2)	%
Net (decrease) increase in cash, cash equivalents and restricted cash	$	(25,847)	$	75,332	$	(101,179)	(134.3)	%

Operating Activities. Net cash used in operating activities was $3.0 million for the three months ended March 31, 2021 compared to $6.4 million for the same period in 2020, a decrease of $3.5 million. The decrease in the use of cash from operating activities was driven primarily by an increase in net income of $31.4 million offset by a decrease in stock-based compensation of $28.4 million. Historically, our cash flows from operating activities are lower in the first quarter than the remaining calendar quarters as they are heavily influenced by annual employee bonus and other variable compensation payments made in the first quarter of each year.  

Investing Activities. Cash used in investing activities was $14.5 million for the three months ended March 31, 2021 compared to $21.7 million for the same period in 2020, an decrease of $7.1 million. This decrease was primarily due to a decrease in cash paid for acquisitions of $6.2 million period over period. We acquired a controlling interest in Systax, a Brazilian transaction tax software and content subscription provider, for cash of $12.3 million during the three months ended March 31, 2020, partially offset by the acquisition of Tellutax, an Oregon-based computing edge technology company, for cash paid of $6.1 million during the three months ended March 31, 2021. For additional information on the Tellutax acquisition, see “Note 3 to the Interim Condensed Consolidated Financial Statements (unaudited) —Acquisition.”

Financing Activities. Cash (used in) provided by financing activities was $(8.1) million for the three months ended March 31, 2021 compared to $103.7 million for the same period in 2020, a decrease of $111.8 million. The three months ended March 31, 2020 included net borrowings under the bank credit agreement of $121.1 million, offset by distributions to stockholders of $17.2 million. None of this activity recurred in the comparable period in 2021. The three months ended

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March 31, 2021 included $7.2 million in payments for taxes in connection with the exercise of stock options whereby the award holders returned shares to us to satisfy their tax obligations.    

Debt. As of March 31, 2021, we had a $100 million line of credit with no outstanding borrowings. Interest on outstanding borrowings accrue at a Base Rate plus an applicable margin (3.25% as of March 31, 2021) or the London Interbank Offered Rate (“LIBOR”) plus an applicable margin (2.00% as of March 31, 2021). We have no outstanding bank debt at March 31, 2021.

Funds Held for Customers and Customer Funds Obligations

We maintain trust accounts with financial institutions, which allows our customers to outsource their tax remittance functions to us. We have legal ownership over the accounts utilized for this purpose. Funds held for customers represents cash and cash equivalents that, based upon our intent, are restricted solely for satisfying the obligations to remit funds relating to our tax remittance services. Funds held for customers are not commingled with our operating funds.

Customer funds obligations represent our contractual obligations to remit collected funds to satisfy customer tax payments. Customer funds obligations are reported as a current liability on our consolidated balance sheets as the obligations are expected to be settled within one year. Cash flows related to changes in customer funds obligations liability are presented as cash flows from financing activities.

Off-Balance Sheet Arrangements

We do not have any off-balance sheet arrangements, as defined by applicable regulations of the SEC, that are reasonably likely to have a current or future material effect on our financial condition, results of operations, liquidity, capital expenditures or capital resources.

Contractual Obligations and Commitments

Other than the redemption of our outstanding debt through use of a portion of the Offering proceeds, there have been no material updates or changes to our contractual obligations and commitments compared to contractual obligations and commitments described in our Annual Report on Form 10-K for the year ended December 31, 2020.

Use and Reconciliation of Non-GAAP Financial Measures

In addition to our results determined in accordance with GAAP, we have calculated non-GAAP cost of revenues, non-GAAP gross profit, non-GAAP gross margin, non-GAAP research and development expense, non-GAAP selling and marketing expense, non-GAAP general and administrative expense, non-GAAP operating income, non-GAAP net income, Adjusted EBITDA, Adjusted EBITDA margin, free cash flow and free cash flow margin, which are each non-GAAP financial measures. We have provided tabular reconciliations of each of these non-GAAP financial measures to its most directly comparable GAAP financial measure.

We use these non-GAAP financial measures to understand and compare operating results across accounting periods, for internal budgeting and forecasting purposes, and to evaluate financial performance and liquidity. Our non-GAAP financial measures are presented as supplemental disclosure as we believe they provide useful information to investors and others in understanding and evaluating our results, prospects, and liquidity period-over-period without the impact of certain items that do not directly correlate to our operating performance and that may vary significantly from period to period for reasons unrelated to our operating performance, as well as comparing our financial results to those of other companies. Our definitions of these non-GAAP financial measures may differ from similarly titled measures presented by other companies and therefore comparability may be limited. In addition, other companies may not publish these or similar metrics. Thus, our non-GAAP financial measures should be considered in addition to, not as a substitute for, or in isolation from, the financial information prepared in accordance with GAAP financial measures, and should be read in conjunction with the consolidated financial statements included in this Quarterly Report on Form 10-Q.

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We calculate these non-GAAP financial measures as follows:

● Non-GAAP cost of revenues, software subscriptions is determined by adding back to GAAP cost of revenues, software subscriptions, the stock-based compensation expense, and depreciation and amortization of capitalized software costs and acquired intangible assets included in cost of revenues for the respective periods.

● Non-GAAP cost of revenues, services is determined by adding back to GAAP cost of revenues, services, the stock-based compensation expense included in cost of revenues for the respective periods.

● Non-GAAP gross profit is determined by adding back to GAAP gross profit the stock-based compensation expense, and depreciation and amortization of capitalized software costs and acquired intangible assets included in cost of revenues for the respective periods.

● Non-GAAP gross margin is determined by adding back to GAAP gross margin the impact of stock-based compensation expense, and depreciation and amortization of capitalized software costs and acquired intangible assets included in cost of revenues as a percentage of revenues for the respective periods.

● Non-GAAP research and development expense and non-GAAP general and administrative expenses are determined by adding back to GAAP research and development expense and GAAP general and administrative expense the stock-based compensation expense and severance expense included in the applicable expense categories for the respective periods.

● Non-GAAP selling and marketing expense is determined by adding back to GAAP selling and marketing expense the stock-based compensation expense and the amortization of acquired intangible assets included in selling and marketing expense for the respective periods.

● Non-GAAP operating income is determined by adding back to GAAP operating income or loss the stock-based compensation expense, depreciation and amortization of capitalized software costs and acquired intangible assets, and severance expense included in GAAP operating income or loss for the respective periods.

● Non-GAAP net income is determined by adding back to GAAP income or loss before income taxes the stock-based compensation expense, depreciation and amortization of capitalized software costs and acquired intangible assets – cost of subscription revenues, amortization of acquired intangible assets – selling and marketing expense, and severance expense included in GAAP income or loss before income taxes for the respective periods to determine non-GAAP income or loss before income taxes. Non-GAAP income or loss before income taxes is then adjusted for income taxes calculated using the respective statutory tax rates for applicable jurisdictions, which for purposes of this determination were assumed to be 25.5%  and 2.0% for the 2021 and 2020 periods, respectively.

● Adjusted EBITDA is determined by adding back to GAAP net income or loss the net interest income or expense, income taxes, depreciation and amortization of property and equipment, depreciation and amortization of capitalized software costs and acquired intangible assets – cost of subscription revenues, amortization of acquired intangible assets – selling and marketing expense, asset impairments, stock-based compensation expense, severance expense and transaction costs included in GAAP net income or loss for the respective periods.

● Adjusted EBITDA margin is determined by dividing Adjusted EBITDA by total revenues for the respective periods.

● Free cash flow is determined by net cash provided by (used in) operating activities and reducing it for purchases of property and equipment and capitalized software additions for the respective periods.

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● Free cash flow margin is determined by dividing free cash flow by total revenues for the respective periods.

We encourage investors and others to review our financial information in its entirety, not to rely on any single financial measure and to view these non-GAAP financial measures in conjunction with the related GAAP financial measures.

The following schedules reflect our non-GAAP financial measures and reconcile our non-GAAP financial measures to the related GAAP financial measures. Refer to “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations - Key Business Metrics” for further discussion and reconciliation of Adjusted EBITDA, Adjusted EBITDA margin, free cash flow and free cash flow margin to the related GAAP financial measures.

	Three months ended
	March 31
(Dollars in thousands)	2021			2020
Non-GAAP cost of revenues, software subscriptions	$	19,125		$	16,625
Non-GAAP cost of revenues, services	$	10,749		$	9,540
Non-GAAP gross profit	$	68,362		$	63,080
Non-GAAP gross margin		69.7	%		70.6	%
Non-GAAP research and development expense	$	10,898		$	9,587
Non-GAAP selling and marketing expense	$	18,779		$	17,349
Non-GAAP general and administrative expense	$	20,630		$	20,739
Non-GAAP operating income	$	15,357		$	12,425
Non-GAAP net income	$	11,042		$	11,619

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	Three months ended
	March 31
(Dollars in thousands)	2021			2020
Non-GAAP Cost of Revenues, Software Subscriptions:
Cost of revenues, software subscriptions	$	25,590		$	24,684
Stock-based compensation expense		(560)			(3,492)
Depreciation and amortization of capitalized software and acquired intangible assets – cost of subscription revenues		(5,905)			(4,567)
Non-GAAP cost of revenues, software subscriptions	$	19,125		$	16,625
Non-GAAP Cost of Revenues, Services:
Cost of revenues, services	$	11,343		$	14,778
Stock-based compensation expense		(594)			(5,238)
Non-GAAP cost of revenues, services	$	10,749		$	9,540
Non-GAAP Gross Profit:
Gross profit	$	61,303		$	49,783
Stock-based compensation expense		1,154			8,730
Depreciation and amortization of capitalized software and acquired intangible assets - cost of subscription revenues		5,905			4,567
Non-GAAP gross profit	$	68,362		$	63,080
Non-GAAP Gross Margin:
Gross margin		62.5	%		55.7	%
Stock-based compensation expense as a percentage of revenues		1.2	%		9.8	%
Depreciation and amortization of capitalized software and acquired intangible assets – cost of subscription revenues as a percentage of revenues		6.0	%		5.1	%
Non-GAAP gross margin		69.7	%		70.6	%
Non-GAAP Research and Development Expense:
Research and development expense	$	11,459		$	13,079
Stock-based compensation expense		(561)			(3,492)
Non-GAAP research and development expense	$	10,898		$	9,587
Non-GAAP Selling and Marketing Expense:
Selling and marketing expense	$	20,150		$	24,333
Stock-based compensation expense		(1,287)			(6,984)
Amortization of acquired intangible assets – selling and marketing expense		(84)			—
Non-GAAP selling and marketing expense	$	18,779		$	17,349
Non-GAAP General and Administrative Expense:
General and administrative expense	$	24,852		$	37,636
Stock-based compensation expense		(3,541)			(15,714)
Severance expense		(531)			(1,183)
Transaction costs		(150)			—
Non-GAAP general and administrative expense	$	20,630		$	20,739
Non-GAAP Operating Income:
Income (loss) from operations	$	2,144		$	(28,245)
Stock-based compensation expense		6,543			34,920
Depreciation and amortization of capitalized software and acquired intangible assets - cost of subscription revenues		5,905			4,567
Amortization of acquired intangible assets – selling and marketing expense		84			—
Severance expense		531			1,183
Transaction costs		150			—
Non-GAAP operating income	$	15,357		$	12,425

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Non-GAAP Net Income:
Income (loss) before income taxes	$	1,609	$	(28,814)
Stock-based compensation expense		6,543		34,920
Depreciation and amortization of capitalized software and acquired intangible assets - cost of subscription revenues		5,905		4,567
Amortization of acquired intangible assets – selling and marketing expense		84		—
Severance expense		531		1,183
Transaction costs		150		—
Non-GAAP income before income taxes		14,822		11,856
Income tax adjustment at statutory rate		(3,780)		(237)
Non-GAAP net income	$	11,042	$	11,619

Critical Accounting Policies and Estimates

The critical accounting policies that reflect our more significant judgments and estimates used in the preparation of our condensed consolidated financial statements include software development costs, goodwill, accounting for stock-based compensation, revenue recognition, and income taxes, which are described in “Note 1—Summary of Significant Accounting Policies” in Part I, Item 1 of this Quarterly Report on Form 10-Q.

There have been no material updates or changes to our critical accounting policies and estimates compared to the critical accounting policies and estimates described in our Annual Report on Form 10-K for the period ended December 31, 2020.

Recent Accounting Pronouncements

For further information on recent accounting pronouncements, refer to Note 1 in the condensed consolidated financial statements contained within this Quarterly Report on Form 10-Q

Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Interest Rate Risk

We had cash and cash equivalents of $277.7 million as of March 31, 2021. In addition, the Company received proceeds, net of underwriter fees, from its Offering of $423.0 million on July 31, 2020, which it used to pay off outstanding debt of $175.0 million resulting in the Company having no outstanding bank debt after such redemption.

We maintain our cash and cash equivalents in deposit accounts and money market funds with various financial institutions. Due to the short-term nature of these instruments, we believe that we do not have any material exposure to changes in the fair value of our investment portfolio as a result of changes in interest rates. Declines in interest rates, however, would reduce future interest income.

We are exposed to risk related to changes in interest rates. Borrowings under the bank credit agreement bear interest at rates that are variable. Increases in the bank prime or LIBOR rates would increase the interest rate on any outstanding borrowings. Any debt we incur in the future may also bear interest at variable rates.

Foreign Currency Exchange Risk

Our revenue and expenses are primarily denominated in U.S. dollars. For our foreign operations, the majority of our revenues and expenses are denominated in other currencies, such as the Canadian Dollar, Euro, British Pound, Swedish Krona and Brazilian Real. Decreases in the relative value of the U.S. dollar as compared to these currencies may negatively affect our revenue and other operating results as expressed in U.S. dollars. For the three months ended March 31, 2021 and 2020, approximately 1% of our revenues were generated in currencies other than U.S. dollars in each respective period.

We have experienced and will continue to experience fluctuations in our net (loss) income as a result of transaction gains or losses related to revaluing certain current asset and current liability balances that are denominated in currencies

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other than the functional currency of the entities in which they are recorded. We have historically recognized immaterial amounts of foreign currency gains and losses in each of the periods presented. We may in the future hedge selected significant transactions denominated in currencies other than the U.S. dollar as we expand our international operations and our risk grows. The acquisition of the controlling interest in Systax in January 2020 and the future purchase commitments associated with this acquisition are expected to increase our exposure to fluctuations of the Brazilian Real over time. In May 2020, we entered into a series of foreign currency forward contracts to hedge approximately 40% of our exposure to adverse fluctuations in the Brazilian Real associated with these future purchase commitments.

Inflation

Historically, we do not believe that inflation had a material effect on our business, financial condition or results of operations. If our costs were to become subject to significant inflationary pressures, we may not be able to fully offset such higher costs through price increases. Our inability or failure to do so could harm our business, financial condition and results of operations.

Item 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our principal executive officer and principal financial officer, evaluated the effectiveness of our disclosure controls and procedures. Solely as a result of the material weakness described below, our principal executive officer and principal financial officer concluded that, as of March 31, 2021, our disclosure controls and procedures were not effective.

We have performed additional analyses, reconciliations, and other post-closing procedures and have concluded that, notwithstanding the material weakness in our internal control over financial reporting, the unaudited interim condensed consolidated financial statements for the periods covered by and included in this Quarterly Report on Form 10-Q fairly state, in all material respects, our financial position, results of operations and cash flows for the periods presented in conformity with GAAP.

Previously Identified Material Weaknesses

As previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2020, we identified a material weakness in our internal control over financial reporting due to an insufficient process for the provision and governance of user access to financially significant systems that resulted in a lack of segregation of duties related to journal entries.

A material weakness is a control deficiency, or combination of control deficiencies, that results in a reasonable possibility that a material misstatement of the annual or interim financial statements will not be prevented or detected on a timely basis.

Our management, with oversight from our Audit Committee, is in the process of remediating this material weakness. During 2020, we implemented changes to our user access governance practices to prevent individuals from having the ability to create and post journal entries and have implemented a periodic review cycle for user access. However, this material weakness will not be considered remediated until the applicable controls operate for a sufficient period of time and management has concluded, through testing, that these controls are operating effectively.

Changes in Internal Control over Financial Reporting

Other than the changes described above regarding enhancements associated with ongoing remediation efforts, there were no changes in our internal control over financial reporting during the period covered by this Quarterly Report on Form 10-Q that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II---OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

From time to time, we may become involved in various lawsuits and legal proceedings, which arise, in the ordinary course of business. However, litigation is subject to inherent uncertainties, and an adverse result in these or other matters may arise from time to time that may harm our business. We are currently not aware of any such legal proceedings or claims that we believe will have a material adverse effect on our business, financial condition, or operating results.

ITEM 1A. RISK FACTORS

There are no material changes to the risk factors discussed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020 under the heading “Risk Factors.” You should carefully consider these risks, together with management’s discussion and analysis of our financial condition and results of operations in conjunction with the condensed consolidated financial statements and the notes thereto included elsewhere in this Quarterly Report on Form 10-Q. If any of the events contemplated should occur, our business, results of operations, financial condition and cash flows could suffer significantly.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

None.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 4. MINE SAFETY DISCLOSURES

Not Applicable.

ITEM 5. OTHER INFORMATION

None.

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ITEM 6. EXHIBITS

Exhibit Number	Exhibit Description	Form	File No.	Exhibit	Filing Date	Filed Herewith	Furnished Herewith
31.1	Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002						X
31.2	Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002						X
32.1	Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002						X
32.2	Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002						X
101.INS	Inline XBRL Instance Document						X
101.SCH	Inline XBRL Taxonomy Extension Schema Document						X
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document						X
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document						X
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document						X
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document						X
104	Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Vertex, Inc.
Date: May 13, 2021	By:	/s/ David DeStefano
		David DeStefano
		President, Chief Executive Officer and Chairperson (principal executive officer)
Date: May 13, 2021	By:	/s/ John Schwab
		John Schwab
		Chief Financial Officer (principal financial officer)

-54-

EX-31.1

Exhibit 31.1

CERTIFICATION

I, David DeStefano, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Vertex, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(c) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 13, 2021	By:	/s/ David DeStefano
	David DeStefano
	Chief Executive Officer (principal executive officer)

EX-31.2

Exhibit 31.2

CERTIFICATION

I, John Schwab, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Vertex, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(c) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 13, 2021	By:	/s/ John Schwab
	John Schwab
	Chief Financial Officer (principal financial officer)

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Vertex, Inc. (the “Company”) for the period ended March 31, 2021 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: May 13, 2021	By:	/s/ David DeStefano
	David DeStefano
	Chief Executive Officer (principal executive officer)

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Vertex, Inc. (the “Company”) for the period ended March 31, 2021 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

ov
Date: March 31, 2021	By:	/s/ John Schwab
	John Schwab
	Chief Financial Officer (principal financial officer)

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2021	May 11, 2021
Document Information:
Document Type	10-Q
Document Period End Date	Mar. 31, 2021
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	333-239644
Entity Registrant Name	Vertex, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	23-2081753
Entity Address, Address Line One	2301 Renaissance Blvd
Entity Address, City or Town	King of Prussia
Entity Address State Or Province	PA
Entity Address, Postal Zip Code	19406
City Area Code	800
Local Phone Number	355-3500
Title of 12(b) Security	Class A Common Stock, Par Value $0.001 Per Share
Trading Symbol	VERX
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Central Index Key	0001806837
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Amendment Flag	false
Class A
Document Information:
Entity Common Stock, Shares Outstanding		27,458,773
Class B
Document Information:
Entity Common Stock, Shares Outstanding		120,117,000

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 277,681	$ 303,051
Funds held for customers	8,745	9,222
Accounts receivable, net of allowance of $8,059, and $8,592	63,798	77,159
Prepaid expenses and other current assets	26,696	13,259
Total current assets	376,920	402,691
Property and equipment, net of accumulated depreciation	57,408	56,557
Capitalized software, net of accumulated amortization	34,642	31,989
Goodwill and other intangible assets	21,553	18,711
Deferred commissions	11,693	11,743
Deferred income tax asset	30,373	29,974
Operating lease right-of-use assets	22,981
Other assets	2,767	3,263
Total assets	558,337	554,928
Current liabilities:
Accounts payable	11,115	8,876
Accrued expenses	15,936	19,176
Distributions payable	2,700	2,700
Customer funds obligations	8,798	9,235
Accrued salaries and benefits	18,065	17,326
Accrued variable compensation	5,854	22,372
Deferred compensation, current	2,057	2,057
Deferred revenue	204,971	207,560
Current portion of long-term debt		882
Current portion of operating lease liabilities	4,665
Current portion of finance lease liabilities	267
Deferred rent and other		939
Purchase commitment and contingent consideration liabilities, current	767	845
Total current liabilities	275,195	291,968
Deferred compensation, net of current portion	6,048	5,010
Deferred revenue, net of current portion	13,162	14,702
Debt, net of current portion		225
Operating lease liabilities, net of current portion	26,671
Finance lease liabilities, net of current portion	334
Purchase commitment and contingent consideration liabilities, net of current portion	10,287	8,905
Deferred other liabilities	64	8,632
Total liabilities	331,761	329,442
Commitments and contingencies (Note 13)
Stockholders' equity:
Additional paid in capital	205,811	206,541
Retained earnings	24,722	21,926
Accumulated other comprehensive loss	(4,104)	(3,127)
Total stockholders' equity	226,576	225,486
Total liabilities and equity	558,337	554,928
Class A
Stockholders' equity:
Common stock, value issued	27	26
Class B
Stockholders' equity:
Common stock, value issued	$ 120	$ 120

XML

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Allowance for accounts receivable	$ 8,059	$ 8,592
Preferred stock par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	30,000	30,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Class A
Common stock par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	300,000	300,000
Common stock, shares issued (in shares)	26,972	26,327
Common stock, shares outstanding (in shares)	26,972	26,327
Class B
Common stock par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	150,000	150,000
Common stock, shares issued (in shares)	120,117	120,117
Common stock, shares outstanding (in shares)	120,117	120,117

XML

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues:
Revenues	$ 98,236	$ 89,245
Cost of revenues:
Cost of revenues	36,933	39,462
Gross profit	61,303	49,783
Operating expenses:
Research and development	11,459	13,079
Selling and marketing	20,150	24,333
General and administrative	24,852	37,636
Depreciation and amortization	2,827	2,869
Other operating (income) expense, net	(129)	111
Total operating expenses	59,159	78,028
Income (loss) from operations	2,144	(28,245)
Interest expense, net	535	569
Income (loss) before income taxes	1,609	(28,814)
Income tax (benefit) expense	(679)	250
Net income (loss)	2,288	(29,064)
Other comprehensive loss from foreign currency translation adjustments and revaluations, net of tax	977	2,998
Total comprehensive income (loss)	1,311	(32,062)
Software subscriptions
Revenues:
Revenues	83,280	75,760
Cost of revenues:
Cost of revenues	25,590	24,684
Services
Revenues:
Revenues	14,956	13,485
Cost of revenues:
Cost of revenues	11,343	14,778
Class A
Operating expenses:
Net income (loss) attributable to stockholders, basic	$ 413
Net income (loss) per share, basic	$ 0.02
Weighted average common stock, basic	26,458
Net income (loss) attributable to stockholders, diluted	$ 550
Net income (loss) per share, diluted	$ 0.01
Weighted average common stock, diluted	38,003
Class B
Operating expenses:
Net income (loss) attributable to stockholders, basic	$ 1,875	$ (29,064)
Net income (loss) per share, basic	$ 0.02	$ (0.24)
Weighted average common stock, basic	120,117	120,417
Net income (loss) attributable to stockholders, diluted	$ 1,738	$ (29,064)
Net income (loss) per share, diluted	$ 0.01	$ (0.24)
Weighted average common stock, diluted	120,117	120,417

XML

Condensed Consolidated Statements of Changes in Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands	Common Stock Former Class A	Common Stock Former Class B	Common Stock Class A	Common Stock Class B	Additional paid in capital.	Retained Earnings (Accumulated Deficit). ASC 842	Retained Earnings (Accumulated Deficit).	Accumulated Other Comprehensive Loss	Treasury stock	Former Class A	Former Class B	Class A	Class B	Options for redeemable shares	ASC 842	Total
Balance at Dec. 31, 2019		$ 54					$ (90,701)	$ (491)	$ (38,638)							$ (129,776)
Balance (in shares) at Dec. 31, 2019	147	120,270							41,910
Options for redeemable shares, bgn at Dec. 31, 2019														$ 17,344
Remeasurement of options for redeemable shares							(15,242)									(15,242)
Remeasurement of options for redeemable shares														15,242
Distributions declared							(4,010)									(4,010)
Foreign currency translation adjustments and revaluations, net of tax								(2,998)								(2,998)
Net income (loss)							(29,064)									(29,064)
Balance at Mar. 31, 2020		$ 54					(139,017)	(3,489)	$ (38,638)							(181,090)
Balance (in shares) at Mar. 31, 2020	147	120,270							41,910	147	120,270
Options for redeemable shares, ending at Mar. 31, 2020														$ 32,586
Balance at Dec. 31, 2020			$ 26	$ 120	$ 206,541		21,926	(3,127)								225,486
Balance (in shares) at Dec. 31, 2020			26,327	120,117								26,327	120,117
Exercise of stock options, net			$ 1		(6,998)											(6,997)
Exercise of stock options, net (in shares)			640
Shares issued upon vesting of Restricted Stock Units					(34)											(34)
Shares issued upon vesting of Restricted Stock Units (shares)			5
Stock-based compensation expense					6,302											6,302
Foreign currency translation adjustments and revaluations, net of tax								(977)								(977)
Net income (loss)							2,288									2,288
Balance at Mar. 31, 2021			$ 27	$ 120	$ 205,811	$ 508	$ 24,722	$ (4,104)							$ 508	$ 226,576
Balance (in shares) at Mar. 31, 2021			26,972	120,117								26,972	120,117

XML

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income (loss)	$ 2,288	$ (29,064)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	8,816	7,436
Provision for subscription cancellations and non-renewals, net of deferred allowance	379	(39)
Amortization of deferred financing costs	53	221
Stock-based compensation expense	6,543	34,920
Deferred income tax (benefit) provision	(615)
Non-cash operating lease costs	998
Other	(14)	72
Changes in operating assets and liabilities:
Accounts receivable	13,810	9,453
Prepaid expenses and other current assets	(13,437)	(2,167)
Deferred commissions	50	634
Accounts payable	2,258	(2,697)
Accrued expenses	(3,048)	(1,042)
Accrued and deferred compensation	(14,966)	(19,706)
Deferred revenue	(5,046)	(4,307)
Operating lease liabilities	(1,519)
Other	485	(131)
Net cash used in operating activities	(2,965)	(6,417)
Cash flows from investing activities:
Acquisition of business, net of cash acquired	(6,100)	(12,318)
Property and equipment additions	(6,195)	(5,632)
Capitalized software additions	(2,221)	(3,706)
Net cash used in investing activities	(14,516)	(21,656)
Cash flows from financing activities:
Net increase in customer funds obligations	(438)	(208)
Proceeds from line of credit		12,500
Principal payments on line of credit		(12,500)
Proceeds from long-term debt		175,000
Principal payments on long-term debt		(51,041)
Payments for deferred financing costs, net		(2,904)
Payments for taxes related to net share settlement of stock-based awards	(7,178)
Proceeds from exercise of stock options	147
Distributions to stockholders		(17,193)
Payments on financing lease liabilities	(671)
Net cash (used in) provided by financing activities	(8,140)	103,654
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(226)	(249)
Net (decrease) increase in cash, cash equivalents and restricted cash	(25,847)	75,332
Cash, cash equivalents and restricted cash, beginning of period	312,273	83,495
Cash, cash equivalents and restricted cash, end of period	$ 286,426	$ 158,827

XML

Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Reconciliation of cash, cash equivalents and restricted cash to the Consolidated Balance Sheets, end of period:
Cash and cash equivalents	$ 277,681	$ 40,416
Restricted cash-funds held for stockholder distributions		110,000
Restricted cash-funds held for customers	8,745	8,411
Total cash, cash equivalents and restricted cash, end of period	$ 286,426	$ 158,827

XML

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

3 Months Ended

Mar. 31, 2021

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

1.    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Nature of Business

Vertex, Inc. (“Vertex”) and its direct and indirect wholly owned subsidiaries (collectively, the “Company”) operate as solutions providers of state, local and value added tax calculation, compliance and analytics, offering software products which are sold through software license and software as a service (“cloud”) subscriptions. The Company also provides implementation and training services in connection with its software license and cloud subscriptions, transaction tax returns outsourcing, and other tax-related services. The Company sells to customers located throughout the United States of America (“U.S.”) and internationally.

Basis of Consolidation

The condensed consolidated financial statements are prepared in accordance with accounting principles generally accepted in the U.S. (“U.S. GAAP”) and include the accounts of the Company. All intercompany transactions have been eliminated in consolidation.

On January 7, 2020, the Company acquired a 60% controlling interest in Systax Sistemas Fiscais LTDA (“Systax”), a provider of Brazilian transaction tax content and software. Systax is considered a Variable Interest Entity (“VIE”) and its accounts have been included in the condensed consolidated financial statements from the acquisition date. Systax was determined to be a VIE as Vertex is the primary beneficiary of the equity interests in Systax and participates significantly in the variability in the fair value of Systax’s net assets.

Unaudited Interim Financial Information

The accompanying unaudited interim condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) for interim financial information and include the accounts of the Company. Certain information and disclosures normally included in consolidated financial statements prepared in accordance with accounting principles generally accepted in the U.S. (“GAAP”) have been condensed or omitted. Accordingly, these interim condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the related notes for the year ended December 31, 2020, included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020 (the “2020 Annual Report”) filed with the SEC on March 15, 2021. The interim condensed consolidated balance sheet as of December 31, 2020 has been derived from audited financial statements included in the 2020 Annual Report on Form 10-K for the year ended December 31, 2020. The accompanying interim condensed consolidated balance sheet as of March 31, 2021, and the interim condensed consolidated statements of comprehensive income (loss), changes in equity (deficit) and cash flows for the three months ended March 31, 2021 and 2020 are unaudited. The unaudited interim condensed consolidated financial statements have been prepared on a basis consistent with that used to prepare the annual audited consolidated financial statements and include, in the opinion of management, all adjustments, consisting of normal and recurring items, necessary for the fair presentation of the condensed consolidated financial statements. The operating results for the three months ended March 31, 2021 are not necessarily indicative of the results expected for the full year ending December 31, 2021.

Segments

The Company operates its business as one operating segment. For the three months ended March 31, 2021 and 2020, approximately 5% and 3%, respectively, of the Company’s revenues were generated outside the U.S..

Fair Value Measurement

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at a measurement date. A three-level fair value hierarchy (the “Fair Value

Hierarchy”) prioritizes the inputs used to measure fair value. The Fair Value Hierarchy requires the Company to maximize the use of observable inputs and minimize the use of unobservable inputs. Classification in the Fair Value Hierarchy is based on the lowest of the following levels that is significant to the measurement:

Level 1: Inputs are unadjusted quoted prices in active markets for identical assets or liabilities.

Level 2: Inputs are quoted prices for similar assets and liabilities in active markets or quoted prices for identical or similar instruments in markets that are not active and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets.

Level 3: Inputs are unobservable inputs based on the Company’s assumptions and valuation techniques used to measure assets and liabilities at fair value. The inputs require significant management judgment or estimation.

The Company’s assessment of the significance of an input to a fair value measurement requires judgment, which may affect the determination of fair value and the measurement’s classification within the Fair Value Hierarchy.

Use of Estimates

The preparation of condensed consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, equity, revenues and expenses during the reporting period. Significant estimates used in preparing these condensed consolidated financial statements include: (i) the estimated allowance for subscription cancellations, (ii) expected credit losses associated with the allowance for doubtful accounts; (iii) the reserve for self-insurance, (iv) assumptions related to achievement of technological feasibility for software developed for sale, (v) product life cycles, (vi) estimated useful lives and potential impairment of long-lived assets, intangible assets and goodwill, (vii) determination of the fair value of tangible and intangible assets acquired, liabilities assumed and consideration transferred in an acquisition, (viii) amortization period of material rights and deferred commissions (ix) valuation of the Company’s stock used to measure stock-based compensation awards, (x) Black-Scholes-Merton option pricing model (“Black-Scholes model”) input assumptions used to determine the fair value of stock-based compensation awards, and (x) the potential outcome of future tax consequences of events that have been recognized in the condensed consolidated financial statements or tax returns. Actual results may differ from these estimates.

Software Development Costs

Internal-Use Software

The Company follows Accounting Standard Codification (“ASC”) 350-40, Goodwill and Other, Internal-Use Software, to account for development costs incurred for the costs of computer software developed or obtained for internal use. ASC 350-40 requires such costs to be capitalized once certain criteria are met. Internal-use software is included in internal-use software developed in property and equipment in the condensed consolidated balance sheets once available for its intended use and is depreciated over periods between 3 to 5 years. Depreciation expense for internal-use software utilized for cloud-based solutions and for software for internal systems and tools is included in cost of revenues, software subscriptions and depreciation and amortization expense, respectively, in the condensed consolidated statements of comprehensive income (loss).

Software Developed for Sale

The costs incurred for the development of computer software to be sold, leased, or otherwise marketed are capitalized in accordance with ASC 985-20, Costs of Software to be Sold, Leased or Marketed, when technological feasibility has been established. Amortization of capitalized software development costs begins when the product is available for general release. Amortization is provided on a product-by-product basis using the straight-line method over periods between 3 to 5 years and is included in cost of revenues, software subscriptions in the condensed consolidated statements of comprehensive income (loss). Capitalized software costs are subject to an ongoing assessment of recoverability based on anticipated future revenues and changes in software technologies at least annually at December 31, and whenever events or circumstances make it more likely than not that impairment may have occurred.

Business Combinations

Upon acquisition of a company, the Company determines if the transaction is a business combination, which is accounted for using the acquisition method of accounting. Under the acquisition method, once control is obtained of a business, the assets acquired, liabilities assumed, consideration transferred and amounts attributed to noncontrolling interests, are recorded at fair value. The Company uses its best estimates and assumptions to assign fair value to the tangible and intangible assets acquired, liabilities assumed, consideration transferred, and amounts attributed to noncontrolling interests at the acquisition date. One of the most significant estimates relates to the determination of the fair value of these amounts. The determination of the fair values is based on estimates and judgments made by management. The Company’s estimates of fair value are based upon assumptions it believes to be reasonable, but which are inherently uncertain and unpredictable. Measurement period adjustments to these values as of the acquisition date are reflected at the time identified, up through the conclusion of the measurement period, which is the time at which all information for determination of the values of assets acquired, liabilities assumed, consideration transferred and noncontrolling interests is received, and is not to exceed one year from the acquisition date (the “Measurement Period”). Thus the Company may record adjustments to the fair value of these tangible and intangible assets acquired, liabilities assumed, consideration transferred and noncontrolling interests, with the corresponding offset to goodwill during this Measurement Period. Additionally, uncertain tax positions and tax-related valuation allowances are initially recorded in connection with a business combination as of the acquisition date. The Company continues to collect information and reevaluate these estimates and assumptions periodically and record any adjustments to preliminary estimates to goodwill, provided the Company is within the Measurement Period, with any adjustments to amortization of new or previously recorded identifiable intangibles being recorded to the consolidated statements of comprehensive income (loss) in the period in which they arise. In addition, if outside of the Measurement Period, any subsequent adjustments to the acquisition date fair values are reflected in the consolidated statements of comprehensive income (loss) in the period in which they arise.

Goodwill

Goodwill represents the excess of the purchase price over the fair value of net tangible and intangible assets acquired in a business combination. The Company evaluates goodwill for impairment annually at October 1 and whenever events or circumstances make it more likely than not that impairment may have occurred.

Stock-Based Compensation

The Company’s Registration Statement on Form S-1 with the SEC was declared effective on July 28, 2020, resulting in the Class A shares being registered and available for trading on the NASDAQ exchange (the “Offering”). On the effective date of the Offering, the Company adopted the 2020 Incentive Award Plan (the “2020 Plan”) and the 2020 Employee Stock Purchase Plan (the “ESPP”), which provides for the award of stock appreciation rights (“SARs”), stock options (“options”), restricted stock awards (“RSAs”), restricted stock units (“RSUs”), and participation in the ESPP (collectively, the "awards"), which are subject to guidance set forth in ASC 718, Compensation—Stock Compensation, ("ASC 718") for the award of equity-based instruments.

The Company applies the provisions of ASC 718, Compensation—Stock Compensation, for the award of equity-based instruments. The provisions of ASC 718 require a company to measure the fair value of stock-based compensation as of the grant date of the award. Stock-based compensation expense reflects the cost of employee services received in exchange for the awards.

SARs are accounted for as liabilities under ASC 718 and, as such, the Company recognizes stock-based compensation expense by remeasuring the value of the SARs at the end of each reporting period and accruing the portion of the requisite service rendered at that date. Prior to July 2, 2020, the date management determined the Company was considered to have become a public entity, the Company measured SARs at their intrinsic value. After such date, management remeasured outstanding SARs using the fair value-based method under ASC 718.

Stock-based compensation expense for stock options issued under the 2020 Plan after the Offering is measured based on the grant date fair value of the award and is estimated using the Black-Scholes model. Compensation cost is recognized on a straight-line basis over the requisite service or performance period associated with the award.

Stock-based compensation expense for RSAs and RSUs is based on the fair value of the Company’s underlying common stock on the date of grant. Compensation cost is recognized on a straight-line basis over the requisite service or performance period associated with the award.

The ESPP permits participants to purchase Class A common stock through payroll deductions, up to a specified percentage of their eligible compensation or a lump sum contribution amount for the initial offering period. The plan is a compensatory plan as it allows participants to purchase stock at a 15% discount from the lower of the fair value of the Class A common on the first or last day of the ESPP offering period (the “ESPP discount”).The ESPP is accounted for as an equity classified award. Stock-based compensation expense for the ESPP is measured based on the fair value of the ESPP award at the start of the offering period. The fair value is comprised of the value of the ESPP discount and the value associated with the variability in the Class A common stock price during the offering period (the “Call/Put”), which is estimated using the Black-Scholes model. Compensation cost is recognized on a straight-line basis over the respective offering period.

The Company has elected to recognize award forfeitures as they occur.

Revenue Recognition

Revenue from contracts with customers

The Company recognizes revenue in accordance with ASC 606, Revenue from Contracts with Customers. Revenue is recognized upon transfer of control of promised products or services to customers in an amount that reflects the consideration expected to be received in exchange for those products or services. The Company enters into contracts that can include various combinations of products and services, which are generally capable of being distinct, and accounted for as separate performance obligations. Revenue is recognized net of allowance for subscription and non-renewal cancellations and any taxes collected from customers, which are subsequently remitted to governmental authorities.

Nature of goods and services

Licenses for on-premise software subscriptions provide the customer with a right to use the software as it exists when made available to the customer. Customers purchase a subscription to these licenses, which includes the related software and tax content updates (collectively “updates”) and product support. The updates and support, which are part of the subscription agreement, are essential to the continued utility of the software; therefore, the Company has determined the software and the related updates and support to be a single performance obligation. Accordingly, when on-premise software is licensed, the revenue associated with this combined performance obligation is recognized ratably over the license term as these subscriptions are provided for the duration of the license term. Revenue recognition begins on the later of the beginning of the subscription period or the date the software is made available to the customer to download. The Company’s on-premise software subscription prices in the initial subscription year are higher than standard renewal prices. The excess initial year price over the renewal price (“new sale premium”) is a material right that provides customers with the right to this reduced renewal price. The Company recognizes revenue associated with this material right over the estimated period of benefit to the customer, which is generally three years.

Cloud-based subscriptions allow customers to use Company-hosted software over the contract period without taking possession of the software. The cloud-based offerings also include related updates and support. Cloud-based contracts consistently provide a benefit to the customer during the subscription period; thus, the associated revenue is recognized ratably over the related subscription period. Revenue recognition begins on the later of the beginning of the subscription period or the date the customer is provided access to the cloud-based solutions.

Revenue from deliverable-based services is recognized as services are delivered. Revenue from fixed fee services is recognized as services are performed using the percentage of completion input method.

The Company has elected the "right to invoice" practical expedient for revenue related to services that are billed on an hourly basis, which enables revenue to be recognized as the services are performed.

The Company has determined that the methods applied to measuring its progress toward complete satisfaction of performance obligations recognized over time are a faithful depiction of the transfer of control of software subscriptions and services to customers.

Significant Judgments

Contracts with customers often include promises to transfer multiple products and services to a customer. Determining whether products and services are considered distinct performance obligations that should be accounted for separately versus together may require significant judgment. Identification of the amortization periods of material rights and contract costs requires significant judgement by management.

Payment terms

Payment terms and conditions vary by contract, although the Company’s terms generally include a requirement of payment within 30-days. In instances where the timing of revenue recognition differs from the timing of payment, the Company has determined that its contracts do not include a significant financing component. The primary purpose of invoicing terms is to provide customers with simplified and predictable ways of purchasing products and services, not to receive financing from customers or to provide customers with financing.

Cost of Revenues

Cost of revenues, software subscriptions includes the direct cost to develop, host and distribute software products, the direct cost to provide customer support, and amortization of costs capitalized for software developed for sale and for internal-use software utilized for cloud-based subscriptions. Cost of revenues, services includes the direct costs of implementation, training, transaction tax returns outsourcing and other tax-related services.

Reimbursable Costs

Reimbursable costs passed through and invoiced to customers of the Company are recorded as services revenues with the associated expenses recorded as cost of revenues, services in the condensed consolidated statements of comprehensive income (loss).

Income Taxes

On July 27, 2020, the Company’s S-Corporation election (the “S Election”) was terminated by the Company’s stockholders in connection with the Offering. As a result, Vertex became taxable at the corporate level as a C-Corporation for U.S federal and state income tax purposes. In connection with the S Election termination, the Company entered into an agreement with the S-Corporation stockholders pursuant to which the Company has indemnified them for unpaid income tax liabilities and may be required to make future payments in material amounts to them attributable to incremental income taxes resulting from an adjustment to S-Corporation related taxable income (the “Tax Sharing Agreement”). In addition, the Tax Sharing Agreement indemnifies the S-Corporation stockholders for any interest, penalties, losses, costs or expenses arising out of any claim under the agreement. Correspondingly, the S-Corporation stockholders have indemnified the Company with respect to unpaid tax liabilities (including interest and penalties) attributable to a decrease in S-Corporation stockholders’ taxable income and a corresponding increase in our taxable income as a C-Corporation for any period.

Prior to July 27, 2020, as Vertex was taxed as an S-Corporation for U.S. federal and certain states income tax purposes, net income or loss was allocated to and included on the income tax returns of the S-Corporation stockholders. Historically, the Company distributed amounts to the S-Corporation stockholders to satisfy their tax liabilities resulting from allocated net income or loss. Vertex was taxed at the corporate level in those states where the S-Corporation status was not recognized or where the state imposed a tax on an S-Corporation. Accordingly, the income tax provision or benefit was based on taxable income allocated to these states. In certain foreign jurisdictions, Vertex subsidiaries were taxed at the corporate level, and the income tax provision or benefit was based on taxable income sourced to these foreign jurisdictions.

Supplemental Cash Flow Disclosures

Supplemental cash flow disclosures are as follows for the respective periods:

	For the three months ended
	March 31,
	2021		2020
	(unaudited)
Cash paid for interest	$	69	$	559
Cash paid for income taxes	$	132	$	104
Operating cash flows from operating leases	$	1,320	$	—
Operating cash flows from finance leases	$	28	$	—
Non-cash investing and financing activities:
Purchase commitment and contingent consideration liabilities	$	2,200	$	14,344
Remeasurement of options for redeemable shares	$	—	$	15,242
Leased assets obtained in exchange for new finance lease liabilities	$	173	$	—

Recently Issued Accounting Pronouncements

As an "emerging growth company," the Jumpstart Our Business Startups Act (the “JOBS Act”) allows the Company to delay adoption of new or revised accounting pronouncements applicable to public companies until such pronouncements are made applicable to private companies. The Company has elected to delay adoption of certain new or revised accounting standards. As a result, the Company’s financial statements may not be comparable to the financial statements of issuers who are required to comply with the effective date for new or revised accounting standards that are applicable to public companies.

Recently Adopted Accounting Pronouncements

Leases

In February 2016, the FASB issued ASU No. 2016-02, Leases. This standard amends several of aspects of lease accounting, including requiring lessees to recognize operating leases with a initial term greater than one year on their balance sheet as a right-of-use asset, and a corresponding lease liability, measured at the present value of the future minimum lease payments. The standard is effective for public entities for fiscal years and interim periods beginning after December 15, 2018. The standard is effective for all other entities for fiscal years beginning after December 15, 2021, and interim periods within fiscal years beginning after December 15, 2022, with early adoption permitted.

The Company adopted ASU No. 2016-02 on January 1, 2021 using the modified retrospective transition method, which did not require the Company to adjust comparative periods. The Company’s lease assets and lease liabilities are recognized on the lease commencement date in an amount that represents the present value of future lease payments. The Company’s incremental borrowing rate, which is based on information available at the adoption date for existing leases and the commencement date for leases commencing after the adoption date, is used to determine the present value of lease payments.

The Company elected the "package of three" practical expedients permitted under the transition guidance, which allows (i) a carry forward of the historical lease classification conclusions, (ii) management’s assessment on whether a contract is or contains a lease, and (iii) the initial direct costs for any leases that exist prior to adoption of the new standard.

As a result of the adoption of ASC 842 on January 1, 2021, the Company recorded both operating lease right-of-use assets of $24,004 and operating lease liabilities of $32,562. An adjustment to retained earnings of $508, net of the deferred tax impact, was also recorded. The adoption of ASC 842 had an immaterial impact on the condensed consolidated statements of comprehensive income and cash flows for the three months ended March 31, 2021. The adoption of this standard also resulted in a change in the naming convention for leases classified historically as capital leases. These leases are now referred to as finance leases within property and equipment, with corresponding short-term and long-term debt

liabilities being presented as “Current portion of finance lease liabilities” and “Finance lease liabilities, net of current portion”, respectively. See Note 7 for further information.

The Company does not recognize leases with an initial term less than one year (“short-term leases”) on its condensed consolidated balance sheets, and recognizes such lease payments in the condensed consolidated statements of comprehensive income (loss) on a straight-line basis over the lease term. Leases with an option to extend the related lease term or terminate early are reflected in the lease term when it is reasonably certain that the Company will exercise such options.

Credit Losses

In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, (“ASU 2016-13”) which replaces the existing incurred loss impairment model with an expected credit loss model and requires financial assets, including trade receivables, to be measured at amortized cost to be presented at the net amount expected to be collected. ASU 2016-13 is effective for annual periods, and interim periods within those years, beginning after December 15, 2019, for business entities that are public and meet the definition of an SEC filer (excluding smaller reporting companies), and after December 15, 2022 for all other entities. The Company adopted this standard effective January 1, 2021 and this guidance did not have a material impact on the Company’s condensed consolidated financial statements.

Income Taxes

In December 2019, the FASB issued ASU Update No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, (“ASU 2019-12”) which simplifies the accounting for income taxes. The guidance in ASU 2019-12 is required for annual reporting periods, including interim periods within those annual periods, beginning after December 15, 2020, for business entities that are public, and after December 15, 2021, including interim periods within those annual periods, for all other entities, with early adoption permitted.

The Company adopted this standard on January 1, 2021. There was no impact to the condensed consolidated financial statements from the implementation of this standard on the determination of income taxes for the quarter ended March 31, 2021.

Risks and Uncertainties

In December 2019, a novel strain of coronavirus (“COVID-19”) appeared. In March 2020, the World Health Organization declared the outbreak of COVID-19 to be a pandemic. The COVID-19 pandemic is continuing to have widespread, rapidly evolving and unpredictable impacts on global society, economies, financial markets and business practices. To protect the health and well-being of Company employees and customers, substantial modifications were made to employee travel policies, our offices were closed, and remained closed through March 31, 2021, with employees directed to work from home. In addition, conferences and other marketing events were cancelled or shifted to virtual-only, and the Company continued to participate virtually through March 31, 2021. The COVID-19 pandemic has impacted and may continue to impact Company operations, including employees, customers and partners, and there is substantial uncertainty in the nature and degree of its continued effects over time.

The Company did not experience any significant reductions in sales, revenues or collections through March 31, 2021 as a result of COVID-19. The uncertainty caused by the COVID-19 pandemic could, however, impact Company billings to new customers for the remainder of 2021, and may also negatively impact Company efforts to expand revenues from existing customers as they continue to evaluate certain long-term projects and budget constraints. In addition to the potential impact on sales, the Company may see delays in collections during 2021 as customers adjust their operating protocols to accommodate implementation of new criteria to protect the health and well-being of their employees and customers. However, these delays are not expected to materially impact the business, and thus the Company has not recorded additional credit losses associated with the allowance for doubtful accounts in connection with any delays. The Company believes it has ample liquidity and capital resources to continue to meet its operating needs, and to service debt and other financial obligations.

The extent to which the COVID-19 pandemic impacts the business going forward will depend on numerous evolving factors that cannot reliably be predicted, including the duration and scope of the pandemic; governmental, business, and individuals’ actions in response to the pandemic; and the impact on economic activity, including the possibility of recession or financial market instability. These factors may adversely impact consumer, business and government spending on technology as well as customers’ ability to pay for Company products and services on an ongoing basis. This uncertainty also affects management’s accounting estimates and assumptions, which could result in greater variability in a variety of areas that depend on these estimates and assumptions, including estimated allowance for subscription cancellations, product life cycles and estimated lives of long-lived assets.

Reclassifications

Certain amounts in the  prior period financial statements have been reclassified to conform to the presentation of the current period financial statements. These reclassifications had no effect on previously reported comprehensive income or loss.

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REVENUE RECOGNITION

3 Months Ended

Mar. 31, 2021

REVENUE RECOGNITION

REVENUE RECOGNITION

2. REVENUE RECOGNITION    

See Note 1 for a description of the Company’s revenue recognition accounting policy.

Disaggregation of revenue

The table reflects revenue by major source for the following periods:

	Three months ended
	March 31,
		2021	2020
	(unaudited)
Sources of revenues:
Software subscriptions	$	83,280	$	75,760
Services		14,956		13,485
Total revenues	$	98,236	$	89,245

Contract balances

Timing of revenue recognition may differ from the timing of invoicing customers. A receivable is recorded in the consolidated balance sheets when customers are billed related to revenue to be collected and recognized for subscription agreements as there is an unconditional right to invoice and receive payment in the future related to these subscriptions. A receivable and related revenue may also be recorded in advance of billings to the extent services have been performed and the Company has a right under the contract to bill and collect for such performance. Subscription-based customers are generally invoiced annually at the beginning of each annual subscription period. Accounts receivable is presented net of an allowance for potentially uncollectible accounts and estimated cancellations of software license and cloud-based subscriptions (the “allowance”) of $8,059 and $8,592 at March 31, 2021 and December 31, 2020, respectively. The allowance represents future expected credit losses over the life of the receivables based on past experience, current information and forward-looking economic considerations.

The beginning and ending balances of accounts receivable, net of allowance, are as follows:

	For the three months ended		For the year ended
	March 31, 2021		December 31, 2020
	(unaudited)
Balance, beginning of period	$	77,159	$	70,367
Balance, end of period		63,798		77,159
(Decrease) increase, net	$	(13,361)	$	6,792

A contract liability is recorded as deferred revenue on the consolidated balance sheets when customers are billed in advance of performance obligations being satisfied, and revenue is recognized after invoicing ratably over the subscription period or over the amortization period of material rights. Deferred revenue is reflected net of a related deferred allowance

for subscription cancellations (the “deferred allowance”) of $5,515 and $6,432 at March 31, 2021 and December 31, 2020, respectively. The deferred allowance represents the portion of the allowance for subscription cancellations associated with deferred revenue.

The beginning and ending balances of and changes to the allowance and the deferred allowance are as follows:

	For the three months ended March 31,
	2021				2020
	Balance			Net Change	Balance			Net Change
Allowance balance, January 1	$	(8,592)			$	(7,515)
Allowance balance, March 31		(8,059)				(7,476)
Change in allowance			$	(533)			$	(39)
Deferred allowance balance, January 1		6,432				5,614
Deferred allowance balance, March 31		5,515				5,118
Change in deferred allowance				917				496
Net amount charged to revenues			$	384			$	(457)

The portion of deferred revenue expected to be recognized in revenue beyond one year is included in deferred revenue, net of current portion in the condensed consolidated balance sheets.

The tables provide information about the balances of and changes to deferred revenue for the following periods:

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Balances:
Deferred revenue, current	$	204,971	$	207,560
Deferred revenue, non-current		13,162		14,702
Total deferred revenue	$	218,133	$	222,262

	For the three months ended
	March 31,
	2021		2020
	(unaudited)
Changes to deferred revenue:
Beginning balance	$	222,262	$	205,791
Additional amounts deferred		94,107		84,938
Revenues recognized		(98,236)		(89,245)
Ending balance	$	218,133	$	201,484

Contract costs

Deferred sales commissions earned by the Company’s sales force and certain sales incentive programs and vendor referral agreements are considered incremental and recoverable costs of obtaining a contract with a customer. An asset is recognized for these incremental contract costs and reflected as deferred commissions in the consolidated balance sheets. These contract costs are amortized on a straight-line basis over a period consistent with the transfer of the associated product and services to the customer, which is generally three years. Amortization of these costs are included in selling and marketing expense in the consolidated statements of comprehensive income (loss). The Company periodically reviews

these contract assets to determine whether events or changes in circumstances have occurred that could impact the period of benefit of these assets. There were no impairment losses recorded for the periods presented.

The table provides information about the changes to contract cost balances as of and for the following periods:

	For the three months ended
	March 31,
	2021		2020
Deferred commissions:	(unaudited)
Beginning balance	$	11,743	$	11,196
Additions		2,058		1,972
Amortization		(2,108)		(2,605)
Ending balance	$	11,693	$	10,563

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BUSINESS COMBINATION

3 Months Ended

Mar. 31, 2021

BUSINESS COMBINATION

BUSINESS COMBINATION

3.    BUSINESS COMBINATION

On January 25, 2021, the Company executed an Asset Purchase Agreement with Tellutax LLC, a Portland, Oregon-based edge computing technology startup (“Tellutax”), to acquire substantially all of Tellutax’s assets (the “Tellutax Acquisition”). Cash consideration paid for the acquisition was $6,100, funded through cash on hand, and serves to strengthen the Company’s technology roadmap and hybrid cloud strategy enabling it to better serve customers in an increasingly hyper-connected environment. The Tellutax Acquisition entitles the sellers to contingent consideration if sales targets are met during a period of time following the acquisition. 

The Tellutax Acquisition was accounted for as a business combination. The total preliminary purchase price was allocated to the net assets acquired based on Management’s determination of their estimated fair values using available information as of the acquisition date. The excess of purchase consideration over the net assets acquired is recorded as goodwill, which primarily reflects the value of expected future synergies, the existence of intangible assets not recognized under U.S. GAAP such as the value of the assembled workforce and other market factors. The Company expects that goodwill associated with the Tellutax Acquisition will be deductible for tax purposes. The preliminary values recorded, which are reflected in the table below, will be adjusted during the measurement period as more detailed analyses are performed and further information becomes available regarding the fair values of these amounts on the acquisition date. Any subsequent adjustments to these values not associated with determination of their fair values on the acquisition date will be recorded in the consolidated statements of comprehensive income (loss) in the period the change is identified.

The preliminary purchase price for the Tellutax Acquisition includes cash paid at closing plus an estimated fair value of contingent consideration of $2,200 (the “Tellutax Contingent Consideration”) as of January 25, 2021. The following table presents the allocation of the preliminary purchase price recorded in the condensed consolidated balance sheet as of the acquisition date:

	January 25, 2021
	(unaudited)
Capitalized Software - Developed technology	$	3,600
Goodwill		4,700
Total	$	8,300

The Company has included the financial results of Tellutax in the condensed consolidated statement of comprehensive income (loss) from the date of acquisition. As the Tellutax Acquisition did not have a material impact on the Company’s reported revenue or net income for the three months ended March 31, 2021, pro forma financial information has not been presented.

The fair value of developed technology was valued using the multi-period excess earnings method, which is a variation of the income approach. This method estimates an intangible asset’s value based on the present value of the incremental after-tax cash flows attributable to the intangible asset. The significant assumptions used in the developed technology valuation included forecasted results and discount rate.

The fair value of Tellutax Contingent Consideration is estimated using a Monte-Carlo simulation to compute the expected cash flows from earn-out payments specified in the purchase agreement. Such estimate represents a recurring fair value measurement with significant unobservable inputs, which management considers to be Level 3 measurements under the Fair Value Hierarchy. The significant assumptions used in these calculations included forecasted results and the estimated likelihood for each performance scenario. The Tellutax Contingent Consideration is based on three potential earn-out payments determined by periodic revenue achievements over a thirty-month period.  Earn-out payments had no maximum limit, but if certain targets are not met, there would be no earn-out payment for the applicable measurement period. The estimated fair value of the Tellutax Contingent Consideration recorded as of the acquisition date was $2,200.

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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS

3 Months Ended

Mar. 31, 2021

FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS

FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS

4.      FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS

The Company has investments in money market accounts, which are included in cash and cash equivalents on the consolidated balance sheets. Fair value inputs for these investments are considered Level 1 measurements within the Fair Value Hierarchy since money market account fair values are known and observable through daily published floating net asset values.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The Company has investments in money market accounts, which are included in cash and cash equivalents on the consolidated balance sheets. Fair value inputs for these investments are considered Level 1 measurements within the Fair Value Hierarchy since money market account fair values are known and observable through daily published floating net asset values.

The following table summarizes the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis:

	Fair Value Measurements Using
As of March 31, 2021	Fair Value		Prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Money market funds	$	225,215	$	225,215	$	-	$	-
Tellutax Contingent Consideration*	$	2,200	$	-	$	-	$	2,200
	Fair Value Measurements Using
As of December 31, 2020	Fair Value		Prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Money market funds	$	265,270	$	265,270	$	-	$	-

* As discussed in Note 3, this amount reflects the Tellutax Contingent Consideration for potential payments based on achievement of future revenue targets.

Assets and Liabilities for Which Fair Value is Only Disclosed

The residual carrying amount of cash and cash equivalents and the carrying amount of funds held for customers were the same as their respective fair values and are considered Level 1 measurements.

The carrying amounts for accounts receivable, accounts payable, and accrued expenses approximate their relative fair values due to their short-term nature and are considered Level 2 measurements.

Non-recurring Fair Value Measurements

The Tellutax Acquisition on January 25, 2021, was accounted for as a business combination and the total purchase price was allocated to the net assets acquired and liabilities assumed based on their estimated fair values. See Note 3.

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PROPERTY AND EQUIPMENT

3 Months Ended

Mar. 31, 2021

PROPERTY AND EQUIPMENT

PROPERTY AND EQUIPMENT

5.      PROPERTY AND EQUIPMENT

The major components of property and equipment are as follows:

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Leasehold improvements	$	20,901	$	20,907
Equipment		40,219		41,410
Computer software purchased		11,679		11,620
Internal-use software developed:
Cloud-based customer solutions		65,423		65,423
Internal systems and tools		28,886		25,349
Furniture and fixtures		7,676		7,674
In-process internal-use software		5,836		3,304
		180,620		175,687
Less accumulated depreciation		(123,212)		(119,130)
Property and equipment, net	$	57,408	$	56,557

Depreciation expense for property and equipment, excluding all internal-use software developed and finance leases, was $1,906 and $2,175 for the three months ended March 31, 2021 and 2020 (unaudited), respectively. Depreciation for property and equipment, excluding internal-use software developed for cloud-based customer solutions, is reflected in depreciation and amortization in the condensed consolidated statements of comprehensive income (loss).

Finance lease amortization was $224 for the three months ended March 31, 2021 and depreciation expense for assets held under capital leases was $168 for the three months ended March 31, 2020, and are included in depreciation and amortization expense in the condensed consolidated statements of comprehensive income (loss). Assets under finance leases was $1,533, net of accumulated depreciation of $224, at March 31, 2021 are included in property and equipment in the condensed consolidated balance sheets.  Assets under capital leases of $1,360, net of accumulated depreciation of $1,369, at March 31, 2020 (unaudited) are included in property and equipment in the condensed consolidated balance sheets.

The major components of internal-use software are as follows:

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Internal-use software developed	$	94,309	$	90,772
Less accumulated depreciation		(68,463)		(65,090)
		25,846		25,682
In-process internal-use software		5,836		3,304
Internal-use software developed, net	$	31,682	$	28,986

Amounts capitalized for internal-use software and included in property and equipment additions on the condensed consolidated statements of cash flows are as follows:

	As of March 31,		As of March 31,
	2021		2020
	(unaudited)		(unaudited)
Cloud-based customer solutions	$	3,518	$	3,834
Internal systems and tools		2,551		382
Total	$	6,069	$	4,216

In-process internal-use software developed is not depreciated until it is available for its intended use. Depreciation expense for internal-use software developed for cloud-based customer solutions for the three months ended March 31, 2021 and 2020 (unaudited) was $2,676 and $2,011, respectively, and is included in cost of revenues, software subscriptions in the condensed consolidated statements of comprehensive income (loss).

Depreciation expense for internal-use software developed for internal systems and tools for the three months ended March 31, 2021 and 2020 (unaudited) was $697 and $526, respectively, and is included in depreciation and amortization in the condensed consolidated statements of comprehensive income (loss).

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CAPITALIZED SOFTWARE

3 Months Ended

Mar. 31, 2021

CAPITALIZED SOFTWARE

CAPITALIZED SOFTWARE

6.    CAPITALIZED SOFTWARE

Capitalized software includes acquired software and direct labor and related expenses for software developed for sale for new products and enhancements to existing products.

The major components of capitalized software are as follows:

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Capitalized software	$	64,515	$	63,071
Less accumulated amortization		(35,385)		(32,217)
		29,130		30,854
In-process capitalized software		5,512		1,135
Capitalized software, net	$	34,642	$	31,989

Software development costs capitalized for the three months ended March 31, 2021 and 2020 (unaudited) were $2,221 and $3,706, respectively. During the three months ended March 31, 2021, a preliminary value of $3,600 for developed technology the Company acquired in the Tellutax business combination was recorded and is reflected in in-process capitalized software as the Company undertakes necessary enhancements to integrate it with the Company’s existing software architecture.

Capitalized software amortization expense for the three months ended March 31, 2021 and 2020 was $3,168 and $2,556, respectively, and is included in cost of revenues, software subscriptions in the condensed consolidated statements of comprehensive income (loss).

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LEASES

3 Months Ended

Mar. 31, 2021

LEASES

LEASES

7.   LEASES

The Company leases office space, IT equipment and office equipment. Leases with an initial term of 12 months or less are not recorded on the condensed consolidated balance sheets and lease expense is recognized over the term of these leases on a straight-line basis. The Company’s leases have remaining terms of up to 9 years.

The following table sets forth the Company’s lease assets and liabilities and their balance sheet location as follows:

		As of March 31,
	Balance Sheet Location	2021
Lease assets:		(unaudited)
Operating lease right-of-use assets	Operating lease right-of-use assets	$	22,981
Finance lease assets	Property and equipment, net (Note 5)		1,309
Total lease assets		$	24,290
Lease liabilities:
Current:
Operating lease liabilities	Current portion of operating lease liabilities	$	4,665
Finance lease liabilities	Current portion of finance lease liabilities		267
Total current lease liabilities			4,932
Non-current:
Operating lease liabilities	Operating lease liabilities, net of current portion		26,671
Finance lease liabilities	Finance lease liabilities, net of current portion		334
Total non-current lease liabilities			27,005
Total lease liabilities		$	31,937

The major components of lease cost is as follows:

	For the three months ended
	March 31, 2021
	(unaudited)
Operating lease cost	$	1,169
Finance lease cost:
Amortization of lease assets		224
Interest on lease liabilities		7
Total lease cost	$	1,400

The weighted-average term and discount rate for leases is as follows:

	As of March 31,
	2021
	(unaudited)
Weighted-average remaining lease term (years):
Operating leases		7.2
Finance leases		1.8
Weighted-average discount rate:
Operating leases		2.2	%
Finance leases		2.4	%

Lease liability maturities for the next five years and thereafter are as follows as of March 31, 2021:

	Operating Leases		Finance Leases
	(unaudited)
Remainder of 2021 (nine months remaining)	$	4,177	$	293
2022		4,529		289
2023		4,460		60
2024		4,464		10
2025		4,382		-
Thereafter		12,531		-
Total lease payments		34,543		652
Less: Imputed interest		(3,207)		(51)
Present value of lease liabilities	$	31,336	$	601

Lease liability maturities for the next five years and thereafter under the previous lease accounting standard are as follows:

	As of December 31, 2020
	Operating Leases		Capital Leases
2021	$	5,442	$	915
2022		4,518		230
2023		4,459		—
2024		4,464		—
2025		4,382		—
Thereafter		12,531		—
Total Lease Payments	$	35,796		1,145
Less amount representing interest				(38)
Present value of minimum lease payments				1,107
Less current portion				(882)
Capital lease obligations, net of current portion			$	225

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GOODWILL AND OTHER INTANGIBLE ASSETS

3 Months Ended

Mar. 31, 2021

GOODWILL AND OTHER INTANGIBLE ASSETS

GOODWILL AND OTHER INTANGIBLE ASSETS

8.    GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill and other intangible assets were as follows:

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Goodwill	$	19,529	$	16,329
Other intangible assets, net		2,024		2,382
	$	21,553	$	18,711

The changes in the carrying amount of goodwill for the three months ended March 31, 2021 are as follows:

Balance, January 1, 2021	$	16,329
Acquisition of Tellutax (Note 3)		4,700
Foreign currency translation adjustments		(1,500)
Balance, March 31, 2021, gross		19,529
Accumulated impairment losses		—
Balance, March 31, 2021, net	$	19,529

The Company has recognized various amortizable other intangible assets in connection with acquisitions, including related to customer relationships, technology, and tradenames. The following tables provide additional information for other intangible assets, which are individually not material to the condensed consolidated financial statements:

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Other intangible assets
Weighted average amortization period (years)		5.5		5.5
Gross value	$	2,566	$	2,825
Accumulated amortization		(542)		(443)
Carrying value	$	2,024	$	2,382

	For the three months ended March 31, 2021
	Cost of Revenues, Software Subscriptions		Selling and Marketing Expense		Total Expense
Amortization of acquired intangible assets	$	61	$	84	$	145

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DEBT

3 Months Ended

Mar. 31, 2021

DEBT

DEBT

9.DEBT

Credit Agreement

On March 31, 2020, the Company entered into a credit agreement with a bank, which was subsequently amended on April 3, 2020 to permit another bank to be a party to the agreement, consisting of a $175,000 term loan (the “Term Loan”) and a $100,000 committed line of credit (the “Line of Credit”) (collectively, the “Credit Agreement”).

A portion of the Offering proceeds was used to repay the $175,000 Term Loan in full on July 31, 2020.

The Line of Credit matures in March 2025 and had no outstanding borrowings at March 31, 2021 or December 31, 2020. The Company has the option to select an applicable interest rate at either the bank base rate plus an applicable margin (the “Base Rate Option”) or the LIBOR plus an applicable margin (the “LIBOR Option”). The applicable margins are determined by certain financial covenant performance as defined in the Credit Agreement. At March 31, 2021, the Base Rate Option and LIBOR Option applicable to Line of Credit borrowings were 3.25% and 2.00%, respectively.

The Credit Agreement is collateralized by certain assets of the Company and contains financial and operating covenants. The Company was in compliance with these covenants at March 31, 2021.

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STOCKHOLDERS' EQUITY

3 Months Ended

Mar. 31, 2021

STOCKHOLDERS' EQUITY

STOCKHOLDERS' EQUITY

10.STOCKHOLDERS’ EQUITY

Recapitalization and Initial Public Offering

On July 28, 2020, the Company filed its amended and restated certificate of incorporation with the Delaware Secretary of State to: (i) effect a three-for-one forward stock split (the “Stock Split”); (ii) establish a new capital structure for the

Company (the “New Capital Structure”); and (iii) effect a share exchange (the “Share Exchange”) (collectively, the “Recapitalization”). The Stock Split resulted in each one share owned by a stockholder being exchanged for three shares of common stock, and the number of shares of the Company’s common stock issued and outstanding was increased proportionately based on the Stock Split. After the Stock Split, the Share Exchange occurred, resulting in stockholders of record exchanging their existing Class A and Class B common stock (“former Class A” and “former Class B”, respectively) for newly created shares of Class A and Class B common stock (“Class A” and “Class B”, respectively) issued in connection with the New Capital Structure. The effect of the Stock Split is recognized retrospectively in the condensed consolidated financial statements.

In connection with the New Capital Structure, Treasury Stock was retired and amounts associated with the Treasury Stock were reclassified to additional paid in capital. Thus, at March 31, 2021 and December 31, 2020, there was no Treasury Stock.

Common Stock

During March 31, 2021, the Company issued an aggregate 640 shares of Class A related to the exercise of stock options, net of 356 shares returned to the Company in lieu of payment of the exercise price and taxes due on these exercises. During March 31, 2021, the Company also issued 5 shares Class A in connection with the vesting of RSUs, net of 1 share returned to the Company in lieu of payment of taxes due on the vesting of these RSUs.

At March 31, 2020, the Company had 147 shares of former Class A common stock and 120,270 shares of former Class B common stock outstanding. At March 31, 2020, members of a family (the “Family”) owned all outstanding shares of both former classes of common stock. There were no dividend or liquidation preference differences between the former Class A and former Class B shares. There were common stock equivalents outstanding at March 31, 2020 held by non-Family members that entitled such holders to receive an equivalent number of former Class B shares upon exercise.

In connection with establishing the New Capital Structure in July 2020, the shareholders authorized 450,000 shares of common stock, par value $0.001 per share, and 30,000 shares of preferred stock, par value $0.001 per share. In connection with the New Capital Structure, common stock is divided into two classes, Class A with one vote per share, and Class B with ten votes per share. The rights of the holders of Class A and Class B are identical, except with respect to voting and conversion rights. Upon transfer of Class B shares to a non-Family member, such shares will automatically convert to an equivalent number of Class A shares with the respective voting rights attributable to such new shares. Authorized Class A and Class B shares are 300,000 and 150,000 shares, respectively. There are no dividend or liquidation preference differences between Class A and Class B.

Distributions

The Board declared and paid aggregate distributions pro rata to stockholders of the former Class A and Class B common stock of $4,010 ($0.03 per share) during the three months ended March 31, 2020.

Tax Sharing Agreement Payments

In connection with termination of the Company’s S-Corporation status effective July 27, 2020, the Company entered into a Tax Sharing Agreement with the former S-Corporation shareholders. See Note 1. During the three months ended March 31, 2021, the Company did not distribute to or receive any amounts from the former S-Corporation shareholders under the Tax Sharing Agreement. The Company has an estimated liability of $2,700 at March 31, 2021 and December 31, 2020 in connection with obligations under the Tax Sharing Agreement for estimated amounts to be distributed to the former S-Corporation shareholders for income taxes related to the allocation of taxable income to the S-Corporation short tax period ended July 26, 2020. This number is subject to change based upon the finalization of the associated tax returns for the 2020 S-Corporation short tax period. The Company is required to settle this liability on or before July 30, 2021 under the Tax Sharing Agreement. All obligations of the Company under the Tax Sharing Agreement are satisfied by adjustments of additional paid in capital.

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EARNINGS PER SHARE

3 Months Ended

Mar. 31, 2021

EARNINGS PER SHARE

EARNINGS PER SHARE

11.    EARNINGS PER SHARE

The table below illustrates the calculation of basic and diluted net income (loss) per common share for the Class A common and Class B common for the periods reflected below. The weighted average shares outstanding have been retrospectively restated to reflect the Share Exchange for all periods prior to the Offering, resulting in the Class A shares representing non-Family-owned shares and Class B representing Family-owned shares for all periods presented. See Note 10 for further information on the Share Exchange.

	For the Three Months Ended March 31,
Class A common stock:	2021			2020
	(unaudited)
Numerator, basic:
Net income (loss) attributable to all stockholders	$	2,288		$	(29,064)
Class A common stock as a percentage of total shares outstanding, basic		18.05	%		—	%
Net income attributable to Class A stockholders, basic	$	413		$	—
Numerator, diluted:
Net income (loss) attributable to all stockholders	$	2,288		$	(29,064)
Class A common stock as a percentage of total shares outstanding, diluted		24.06	%		—	%
Net income attributable to Class A stockholders, diluted	$	550		$	—
Denominator, basic and diluted:
Weighted average Class A common stock, basic		26,458			—
Dilutive effect of common stock equivalents*		11,545			—
Weighted average Class A common stock, diluted		38,003			—
Net income per Class A share, basic	$	0.02		$	—
Net income per Class A share, diluted	$	0.01		$	—

*     The following weighted-average outstanding shares of common stock equivalents were excluded from the computation of diluted net income (loss) per share attributable to Class A stockholders because the impact of including them would have been anti-dilutive: 84 and 3,734 for the three months ended March 31, 2021 and 2020, respectively.

	For the Three Months Ended March 31,
Class B common stock:	2021			2020
	(unaudited)
Numerator, basic:
Net income (loss) attributable to all stockholders	$	2,288		$	(29,064)
Class B common stock as a percentage of total shares outstanding, basic		81.95	%		100.00	%
Net income (loss) attributable to Class B stockholders, basic	$	1,875		$	(29,064)
Numerator, diluted:
Net income (loss) attributable to all stockholders	$	2,288		$	(29,064)
Class B common stock as a percentage of total shares outstanding, diluted		75.94	%		100.00	%
Net income (loss) attributable to Class B stockholders, diluted	$	1,738		$	(29,064)
Denominator, basic and diluted:
Weighted average Class B common stock, basic		120,117			120,417
Dilutive effect of common stock equivalents		—			—
Weighted average Class B common stock, diluted		120,117			120,417
Net income (loss) per Class B share, basic	$	0.02		$	(0.24)
Net income (loss) per Class B share, diluted	$	0.01		$	(0.24)

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STOCK-BASED AWARD PLANS

3 Months Ended

Mar. 31, 2021

STOCK-BASED AWARD PLANS

STOCK-BASED AWARD PLANS

12.    STOCK-BASED AWARD PLANS

On the effective date of the Offering, the Company adopted the 2020 Plan and the ESPP.

The 2020 Plan provides the ability to grant cash and equity-based incentive awards to eligible employees, directors and service providers in order to attract, retain and motivate those that make important contributions to the Company. The 2020 Plan provides for the award of stock options, RSAs, RSUs, SARs and other cash compensation.

The ESPP provides eligible employees with rights during each six-month ESPP offering period to purchase shares of the Company’s Class A common at the ESPP discount through payroll deductions, except for the initial offering period (July 28 to November 30, 2020) whereby the participants were permitted to make lump sum contributions to the ESPP for such period. Amounts withheld or received from participants are reflected in accrued salaries and benefits in the consolidated balance sheets until such shares are purchased. Amounts withheld from participants for the offering period ending May 31, 2021 aggregated $810 as of March 31, 2021.

Prior to the adoption of the 2020 Plan, the Company had a SAR plan for the purpose of providing incentives to key members of management and consultants to contribute to the growth and financial success of the Company. As a result of the Offering, SAR participants were offered the option to either redeem their SARs upon the occurrence of the Offering or amend their SARs pursuant to which, upon effectiveness of the 2020 Plan, such SARs would become options to purchase shares of Class A common stock under the 2020 Plan (the “SAR Exchange Offer”). All SAR participants eligible to receive the SAR Exchange Offer accepted and had their outstanding SARs converted to stock options with equivalent terms under the 2020 Plan at the Offering effective date (the “Converted SARs”) of July 28, 2020. This was considered a modification of these SAR awards which was recorded in the respective quarter this occured. The SAR plan was subsequently retired (“Retired SAR Plan”) and any SARs issued after such date will be granted under the 2020 Plan.

Prior to the adoption of the 2020 Plan, the Company had options outstanding to purchase shares of former Class B common stock. Upon the effectiveness of the Offering these options were amended and exchanged for options to purchase an equivalent number of Class A shares at the same exercise price and vesting, subject to many of the terms of the 2020 Plan. These options remain subject to expiration in connection with a Triggering Event under the terms of the original option agreements (the “Amended Options”). Any options issued subsequent to this exchange will be granted under the 2020 Plan.

2020 Plan

As of March 31, 2021, 1,857 shares of Class A common were available for issuance under the 2020 Plan.

Awards issued under the 2020 Plan vest based on service criteria established by the Board. The Company has elected to account for forfeitures as they occur rather than estimate forfeitures at date of grant.

Retired SAR Plan

At March 31, 2020, the fair value of the common stock underlying the SAR Awards was determined by the Board with assistance from management and an independent third-party valuation firm. The determination of value used the market and income approaches, with an adjustment for marketability discount pertinent to private company entities in arriving at the per share fair value (the “valuation methodology”). Under the market approach, the guideline public company method is used, which estimates the fair value of the Company based on market prices of stock of guideline public companies. The income approach involves projecting the future benefits of owning an asset and estimating the present value of those future benefits by discounting them based upon the time value of money and the investment risks associated with ownership. At the end of 2019, due to the consideration by the Board of pursuing the Offering, the valuation methodology began to consider the impact of such an event on the value of the Company’s common stock underlying the awards. As the Company approached the Offering effective date, this resulted in increases in the value of the SAR Awards which resulted in corresponding increases to compensation expense during 2020 which exceeded historical results.  

Amended Options

Prior to the amendment of the options in connection with the Offering in July 2020, the options permitted holders to put their exercised shares back to the Company, thus the options were classified as temporary equity and included in “Options for Redeemable Shares” on the condensed consolidated balance sheet at March 31, 2020. The Company recorded an increase in the value of Options for Redeemable Shares of $15,242 during the three months ended March 31, 2020, pertaining to the 3,849 in options outstanding.  As all options outstanding were fully vested, no related compensation expense was recorded for the three months ended March 31, 2020.

In connection with the amendment, the option holders’ ability to put the exercised Amended Option shares to the Company in order to attain liquidity was exchanged for the right by the holders to exercise these options and sell the related shares on the NASDAQ exchange. As a result of the put right no longer being applicable, the options were no longer considered temporary equity and were reclassified to stockholders equity at the time of the exchange.

Options under 2020 Plan

The following table summarizes activity for options outstanding under the 2020 Plan:

				Weighted
			Weighted	Average
			Average	Remaining	Aggregate
			Exercise	Contractual	Intrinsic
2020 Plan Option Activity	Units		Price	Life (Years)	Value
Outstanding at January 1, 2021	11,876		—
Granted	251	$	32.16
Forfeited	(156)	$	3.30
Exercised	(996)	$	2.18		$	23,220
2020 Plan options outstanding at March 31, 2021	10,975	$	3.13	5.26	$	206,866
2020 Plan options exercisable at March 31, 2021	6,574	$	1.79	3.56	$	132,747

The detail of options outstanding, vested and exercisable under the 2020 Plan as of March 31, 2021 is as follows:

	Options Outstanding		Options Vested and Exercisable
		Weighted		Weighted
		Average		Average
Exercise Prices	Units	Life (Years)	Units	Life (Years)
$0.15 to $0.71	2,382	*	2,382	—
$2.15	863	3.9	863	3.9
$2.50	2,475	5.2	1,846	5.1
$2.67	660	5.9	283	5.9
$3.17	1,486	7.0	735	7.1
$3.73	2,175	8.5	465	8.2
$4.70	683	8.9	—	—
$32.16	251	9.9	—	—
	10,975		6,574

*Amended Options have indefinite contractual lives

The Board intends all options granted to be exercisable at a price per share not less than the per share fair market value of the Company’s Class A common stock underlying the options on the date of grant. Compensation expense for new option awards issued subsequent to the Offering to participants under the 2020 Plan are measured based on the grant date fair value of the awards and recognized in the condensed consolidated statements of comprehensive income (loss) over the period during which the participant is required to perform the requisite services. The vesting period is generally one to four years. The grant date fair value of options is estimated using the Black-Scholes model.

There were no options issued or outstanding under the 2020 Plan for the three months ended March 31, 2020. The Company issued 251 options under the 2020 Plan during the three months ended March 31, 2021. The assumptions used

in the Black-Scholes model to determine the value of the options issued during the three months ended March 31, 2021 are as follows:

Fair market value of common stock	$	32.16
Volatility		36.8	%
Expected term (years)		6.0
Expected dividend yield		—	%
Risk-free interest rate		0.4	%

The fair market value of common stock reflects the market closing price on NASDAQ on the option grant date. As of the valuation date, the Company lacked sufficient historical data on the volatility of its stock price. Selected volatility is representative of expected future volatility and was based on the historical and implied volatility of comparable publicly traded companies over a similar expected term. The expected term represents the term the options are expected to be exercised over, which differs from the term of the option grants which is ten years. The Company does not expect to pay dividends. The risk-free interest rate was based on the rate for a U.S. Treasury zero-coupon issue with a term that closely approximates the expected term of the option grants.

During the three months ended March 31, 2021, the Company recognized aggregate stock-based compensation expense for options and Converted SARs that were exchanged for options under the 2020 Plan of $3,768.  At March 31, 2021, $30,605 of unrecognized compensation expense associated with options and Converted SARs is expected to be recognized over a weighted average period of approximately 3.6 years.

Restricted Stock Units

The following table summarizes RSU activity for the three months ended March 31, 2021:

		Weighted
		Average
		Grant Date Fair
	Units	Value Per Share
Outstanding at January 1, 2021	101	$	23.80
Granted	281		32.22
Vested	(6)		35.09
Forfeited	—		—
Outstanding at March 31, 2021	376	$	30.51

There were no RSUs issued or outstanding for the three months ended March 31, 2020. Stock-based compensation cost for RSUs is measured based on the fair value of the Company’s underlying common stock on the date of grant and is recognized on a straight-line basis in the condensed consolidated statements of comprehensive income (loss) over the period during which the participant is required to perform services in exchange for the award, which is generally one to four years.  Vested RSUs are settled by issuing Class A shares or the equivalent value in cash at the Board’s discretion. During the three months ended March 31, 2021, the Company recognized stock-based compensation expense for RSUs of $436. At March 31, 2021, $10,775 of unrecognized compensation cost for RSUs is expected to be recognized over a weighted average period of approximately 3.8 years.

Restricted Stock Awards

The following table summarizes RSA activity for the three months ended March 31, 2021:

		Weighted
		Average
		Grant Date Fair
	Units	Value Per Share
Outstanding at January 1, 2021	670	$	19.00
Granted	—		—
Vested	—		—
Forfeited	(7)		19.00
Outstanding at March 31, 2021	663	$	19.00

There were no RSAs issued or outstanding for the three months ended March 31, 2020. Stock-based compensation cost for RSAs is measured based on the fair value of the Company’s underlying common stock on the date of grant and is recognized on a straight-line basis in the condensed consolidated statements of comprehensive income (loss) over the period during which the participants are required to perform services in exchange for the award, which is generally one to four years.  Vested RSAs are settled by issuing Class A shares upon vesting.  During the three months ended March 31, 2021, the Company recognized stock-based compensation expense for RSAs of $2,209, net of forfeitures related to these awards. At March 31, 2021, $6,588 of unrecognized compensation cost for RSAs is expected to be recognized over a weighted average period of approximately 2.4 years.

Employee Stock Purchase Plan

The ESPP permits participants to purchase Class A common stock through payroll deductions of up to a specified percentage of their eligible compensation. The maximum number of shares that may be purchased by a participant during any offering period is determined by the plan administrator in advance of each offering period.

On the first trading day of each offering period, each participant will automatically be granted an option to purchase shares of Class A common. The option will expire at the end of the applicable offering period and will be exercised at that time to the extent of the payroll deductions  accumulated or contributions made during such offering period. The purchase price of the shares, in the absence of a contrary designation, is 85% of the lower of the fair value of the Class A common on the first or last day of the ESPP offering period. Participants may voluntarily end their participation in the plan at any time during a specified period prior to the end of the applicable offering period and will be paid their accrued payroll deductions and related contributions, if applicable, that have not yet been used to purchase shares of Class A common. If a participant withdraws from the plan during an offering period, the participant cannot rejoin until the next offering period. Participation ends automatically upon a participant's termination of employment.

A total of 1,000 shares of Class A common were initially reserved for issuance under the ESPP. The number of shares available for issuance under the ESPP will be increased annually on January 1 of each calendar year beginning in 2021 and ending in and including 2030, by an amount equal to the lesser of (i) 1% of the shares of Class A and Class B common stock outstanding on the final day of the immediately preceding calendar year and (ii) such smaller number of shares as is determined by the Board, provided that no more than 16,000 shares of Class A common stock may be issued. The ESPP is administered by a committee of the Board.

During the three months ended March 31, 2021, the Company recorded stock-based compensation expense of $130 related to the ESPP. There were no shares of Class A common stock purchased under the ESPP during the three months ended March 31, 2021 as the current offering period does not end until May 31, 2021. As of March 31, 2021,  there was approximately $88 of unrecognized ESPP stock-based compensation cost that is expected to be recognized on a straight-line basis over the remaining term of the current offering period.

The fair value of ESPP purchase rights is comprised of the value of the 15% ESPP discount and the value associated with the Call/Put over the ESPP offering period. The value of the Call/Put for the current offering period (December 1, 2020 – May 31, 2021) was estimated using the Black-Scholes model with the following assumptions:

	Current
	Offering Period
Fair market value of common stock	$	25.83
Volatility		35.00	%
Expected term (years)		0.50
Expected dividend yield		-	%
Risk-free interest rate		0.11	%

The Company lacks sufficient historical data on the volatility of its stock price. Selected volatility is representative of expected future volatility and was based on the historical and implied volatility of comparable publicly traded companies over a similar expected term. The expected term represents the term of the ESPP offering period, which is generally six months. The Company does not expect to pay dividends after the Offering. The risk-free interest rate was based on the rate for a U.S. Treasury zero-coupon issue with a term that closely approximates the expected term of the award at the date nearest the offering term.

Stock-Based Compensation

The Company recognized total stock-based compensation cost related to incentive awards as follows:

	March 31,
	2021		2020
Stock-based compensation expense:
SARs and Converted SARs	$	3,391	$	34,920
Stock options		377		-
RSUs		436		-
RSAs		2,209		-
ESPP		130		-
Total stock-based compensation expense	$	6,543	$	34,920

The Company recognized stock-based compensation cost in the condensed consolidated statements of comprehensive income (loss) as follows:

	March 31,
	2021		2020
Stock-based compensation expense:
Cost of revenues, software subscriptions	$	560	$	3,492
Cost of revenues, services		594		5,238
Research and development		561		3,492
Selling and marketing		1,287		6,984
General and administrative		3,541		15,714
Total stock-based compensation expense	$	6,543	$	34,920

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LEGAL PROCEEDINGS

3 Months Ended

Mar. 31, 2021

LEGAL PROCEEDINGS

LEGAL PROCEEDINGS

13.   LEGAL PROCEEDINGS

The Company may become involved in various lawsuits and legal proceedings, which arise, in the ordinary course of business. However, litigation is subject to inherent uncertainties, and an adverse result in these or other matters may arise from time to time that may harm the Company’s business. The Company is not aware of any such legal proceedings or claims that management believes will have a material adverse effect on its business, financial condition, or operating results.

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SUBSEQUENT EVENTS

3 Months Ended

Mar. 31, 2021

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS

14.   SUBSEQUENT EVENTS

On May 12, 2021, the Company acquired EVAT Solutions Limited and its subsidiaries, doing business as Taxamo (collectively “Taxamo”), a cloud-based pioneer in tax and payment automation for global e-commerce and marketplaces for approximately $200,000 in cash on hand. The acquisition supports and accelerates the Company’s growth strategies across ecommerce platforms and marketplaces in the enterprise and mid-market in Europe and North America, and among its existing global customers. The Company’s accounting for the Taxamo acquisition, including whether it constitutes an asset or business purchase, is preliminary.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

3 Months Ended

Mar. 31, 2021

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Nature of Business

Nature of Business

Vertex, Inc. (“Vertex”) and its direct and indirect wholly owned subsidiaries (collectively, the “Company”) operate as solutions providers of state, local and value added tax calculation, compliance and analytics, offering software products which are sold through software license and software as a service (“cloud”) subscriptions. The Company also provides implementation and training services in connection with its software license and cloud subscriptions, transaction tax returns outsourcing, and other tax-related services. The Company sells to customers located throughout the United States of America (“U.S.”) and internationally.

Basis of Consolidation

Basis of Consolidation

The condensed consolidated financial statements are prepared in accordance with accounting principles generally accepted in the U.S. (“U.S. GAAP”) and include the accounts of the Company. All intercompany transactions have been eliminated in consolidation.

On January 7, 2020, the Company acquired a 60% controlling interest in Systax Sistemas Fiscais LTDA (“Systax”), a provider of Brazilian transaction tax content and software. Systax is considered a Variable Interest Entity (“VIE”) and its accounts have been included in the condensed consolidated financial statements from the acquisition date. Systax was determined to be a VIE as Vertex is the primary beneficiary of the equity interests in Systax and participates significantly in the variability in the fair value of Systax’s net assets.

Unaudited Interim Financial Information

Unaudited Interim Financial Information

The accompanying unaudited interim condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) for interim financial information and include the accounts of the Company. Certain information and disclosures normally included in consolidated financial statements prepared in accordance with accounting principles generally accepted in the U.S. (“GAAP”) have been condensed or omitted. Accordingly, these interim condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the related notes for the year ended December 31, 2020, included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020 (the “2020 Annual Report”) filed with the SEC on March 15, 2021. The interim condensed consolidated balance sheet as of December 31, 2020 has been derived from audited financial statements included in the 2020 Annual Report on Form 10-K for the year ended December 31, 2020. The accompanying interim condensed consolidated balance sheet as of March 31, 2021, and the interim condensed consolidated statements of comprehensive income (loss), changes in equity (deficit) and cash flows for the three months ended March 31, 2021 and 2020 are unaudited. The unaudited interim condensed consolidated financial statements have been prepared on a basis consistent with that used to prepare the annual audited consolidated financial statements and include, in the opinion of management, all adjustments, consisting of normal and recurring items, necessary for the fair presentation of the condensed consolidated financial statements. The operating results for the three months ended March 31, 2021 are not necessarily indicative of the results expected for the full year ending December 31, 2021.

Segments

Segments

The Company operates its business as one operating segment. For the three months ended March 31, 2021 and 2020, approximately 5% and 3%, respectively, of the Company’s revenues were generated outside the U.S..

Fair Value Measurement

Fair Value Measurement

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at a measurement date. A three-level fair value hierarchy (the “Fair Value

Hierarchy”) prioritizes the inputs used to measure fair value. The Fair Value Hierarchy requires the Company to maximize the use of observable inputs and minimize the use of unobservable inputs. Classification in the Fair Value Hierarchy is based on the lowest of the following levels that is significant to the measurement:

Level 1: Inputs are unadjusted quoted prices in active markets for identical assets or liabilities.

Level 2: Inputs are quoted prices for similar assets and liabilities in active markets or quoted prices for identical or similar instruments in markets that are not active and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets.

Level 3: Inputs are unobservable inputs based on the Company’s assumptions and valuation techniques used to measure assets and liabilities at fair value. The inputs require significant management judgment or estimation.

The Company’s assessment of the significance of an input to a fair value measurement requires judgment, which may affect the determination of fair value and the measurement’s classification within the Fair Value Hierarchy.

Use of Estimates

Use of Estimates

The preparation of condensed consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, equity, revenues and expenses during the reporting period. Significant estimates used in preparing these condensed consolidated financial statements include: (i) the estimated allowance for subscription cancellations, (ii) expected credit losses associated with the allowance for doubtful accounts; (iii) the reserve for self-insurance, (iv) assumptions related to achievement of technological feasibility for software developed for sale, (v) product life cycles, (vi) estimated useful lives and potential impairment of long-lived assets, intangible assets and goodwill, (vii) determination of the fair value of tangible and intangible assets acquired, liabilities assumed and consideration transferred in an acquisition, (viii) amortization period of material rights and deferred commissions (ix) valuation of the Company’s stock used to measure stock-based compensation awards, (x) Black-Scholes-Merton option pricing model (“Black-Scholes model”) input assumptions used to determine the fair value of stock-based compensation awards, and (x) the potential outcome of future tax consequences of events that have been recognized in the condensed consolidated financial statements or tax returns. Actual results may differ from these estimates.

Internal-Use Software

Internal-Use Software

The Company follows Accounting Standard Codification (“ASC”) 350-40, Goodwill and Other, Internal-Use Software, to account for development costs incurred for the costs of computer software developed or obtained for internal use. ASC 350-40 requires such costs to be capitalized once certain criteria are met. Internal-use software is included in internal-use software developed in property and equipment in the condensed consolidated balance sheets once available for its intended use and is depreciated over periods between 3 to 5 years. Depreciation expense for internal-use software utilized for cloud-based solutions and for software for internal systems and tools is included in cost of revenues, software subscriptions and depreciation and amortization expense, respectively, in the condensed consolidated statements of comprehensive income (loss).

Software Developed for Sale

Software Developed for Sale

The costs incurred for the development of computer software to be sold, leased, or otherwise marketed are capitalized in accordance with ASC 985-20, Costs of Software to be Sold, Leased or Marketed, when technological feasibility has been established. Amortization of capitalized software development costs begins when the product is available for general release. Amortization is provided on a product-by-product basis using the straight-line method over periods between 3 to 5 years and is included in cost of revenues, software subscriptions in the condensed consolidated statements of comprehensive income (loss). Capitalized software costs are subject to an ongoing assessment of recoverability based on anticipated future revenues and changes in software technologies at least annually at December 31, and whenever events or circumstances make it more likely than not that impairment may have occurred.

Business Combinations

Business Combinations

Upon acquisition of a company, the Company determines if the transaction is a business combination, which is accounted for using the acquisition method of accounting. Under the acquisition method, once control is obtained of a business, the assets acquired, liabilities assumed, consideration transferred and amounts attributed to noncontrolling interests, are recorded at fair value. The Company uses its best estimates and assumptions to assign fair value to the tangible and intangible assets acquired, liabilities assumed, consideration transferred, and amounts attributed to noncontrolling interests at the acquisition date. One of the most significant estimates relates to the determination of the fair value of these amounts. The determination of the fair values is based on estimates and judgments made by management. The Company’s estimates of fair value are based upon assumptions it believes to be reasonable, but which are inherently uncertain and unpredictable. Measurement period adjustments to these values as of the acquisition date are reflected at the time identified, up through the conclusion of the measurement period, which is the time at which all information for determination of the values of assets acquired, liabilities assumed, consideration transferred and noncontrolling interests is received, and is not to exceed one year from the acquisition date (the “Measurement Period”). Thus the Company may record adjustments to the fair value of these tangible and intangible assets acquired, liabilities assumed, consideration transferred and noncontrolling interests, with the corresponding offset to goodwill during this Measurement Period. Additionally, uncertain tax positions and tax-related valuation allowances are initially recorded in connection with a business combination as of the acquisition date. The Company continues to collect information and reevaluate these estimates and assumptions periodically and record any adjustments to preliminary estimates to goodwill, provided the Company is within the Measurement Period, with any adjustments to amortization of new or previously recorded identifiable intangibles being recorded to the consolidated statements of comprehensive income (loss) in the period in which they arise. In addition, if outside of the Measurement Period, any subsequent adjustments to the acquisition date fair values are reflected in the consolidated statements of comprehensive income (loss) in the period in which they arise.

Goodwill

Goodwill

Goodwill represents the excess of the purchase price over the fair value of net tangible and intangible assets acquired in a business combination. The Company evaluates goodwill for impairment annually at October 1 and whenever events or circumstances make it more likely than not that impairment may have occurred.

Stock-Based Compensation

Stock-Based Compensation

The Company’s Registration Statement on Form S-1 with the SEC was declared effective on July 28, 2020, resulting in the Class A shares being registered and available for trading on the NASDAQ exchange (the “Offering”). On the effective date of the Offering, the Company adopted the 2020 Incentive Award Plan (the “2020 Plan”) and the 2020 Employee Stock Purchase Plan (the “ESPP”), which provides for the award of stock appreciation rights (“SARs”), stock options (“options”), restricted stock awards (“RSAs”), restricted stock units (“RSUs”), and participation in the ESPP (collectively, the "awards"), which are subject to guidance set forth in ASC 718, Compensation—Stock Compensation, ("ASC 718") for the award of equity-based instruments.

The Company applies the provisions of ASC 718, Compensation—Stock Compensation, for the award of equity-based instruments. The provisions of ASC 718 require a company to measure the fair value of stock-based compensation as of the grant date of the award. Stock-based compensation expense reflects the cost of employee services received in exchange for the awards.

SARs are accounted for as liabilities under ASC 718 and, as such, the Company recognizes stock-based compensation expense by remeasuring the value of the SARs at the end of each reporting period and accruing the portion of the requisite service rendered at that date. Prior to July 2, 2020, the date management determined the Company was considered to have become a public entity, the Company measured SARs at their intrinsic value. After such date, management remeasured outstanding SARs using the fair value-based method under ASC 718.

Stock-based compensation expense for stock options issued under the 2020 Plan after the Offering is measured based on the grant date fair value of the award and is estimated using the Black-Scholes model. Compensation cost is recognized on a straight-line basis over the requisite service or performance period associated with the award.

Stock-based compensation expense for RSAs and RSUs is based on the fair value of the Company’s underlying common stock on the date of grant. Compensation cost is recognized on a straight-line basis over the requisite service or performance period associated with the award.

The ESPP permits participants to purchase Class A common stock through payroll deductions, up to a specified percentage of their eligible compensation or a lump sum contribution amount for the initial offering period. The plan is a compensatory plan as it allows participants to purchase stock at a 15% discount from the lower of the fair value of the Class A common on the first or last day of the ESPP offering period (the “ESPP discount”).The ESPP is accounted for as an equity classified award. Stock-based compensation expense for the ESPP is measured based on the fair value of the ESPP award at the start of the offering period. The fair value is comprised of the value of the ESPP discount and the value associated with the variability in the Class A common stock price during the offering period (the “Call/Put”), which is estimated using the Black-Scholes model. Compensation cost is recognized on a straight-line basis over the respective offering period.

The Company has elected to recognize award forfeitures as they occur.

Revenue Recognition

Revenue Recognition

Revenue from contracts with customers

The Company recognizes revenue in accordance with ASC 606, Revenue from Contracts with Customers. Revenue is recognized upon transfer of control of promised products or services to customers in an amount that reflects the consideration expected to be received in exchange for those products or services. The Company enters into contracts that can include various combinations of products and services, which are generally capable of being distinct, and accounted for as separate performance obligations. Revenue is recognized net of allowance for subscription and non-renewal cancellations and any taxes collected from customers, which are subsequently remitted to governmental authorities.

Nature of goods and services

Licenses for on-premise software subscriptions provide the customer with a right to use the software as it exists when made available to the customer. Customers purchase a subscription to these licenses, which includes the related software and tax content updates (collectively “updates”) and product support. The updates and support, which are part of the subscription agreement, are essential to the continued utility of the software; therefore, the Company has determined the software and the related updates and support to be a single performance obligation. Accordingly, when on-premise software is licensed, the revenue associated with this combined performance obligation is recognized ratably over the license term as these subscriptions are provided for the duration of the license term. Revenue recognition begins on the later of the beginning of the subscription period or the date the software is made available to the customer to download. The Company’s on-premise software subscription prices in the initial subscription year are higher than standard renewal prices. The excess initial year price over the renewal price (“new sale premium”) is a material right that provides customers with the right to this reduced renewal price. The Company recognizes revenue associated with this material right over the estimated period of benefit to the customer, which is generally three years.

Cloud-based subscriptions allow customers to use Company-hosted software over the contract period without taking possession of the software. The cloud-based offerings also include related updates and support. Cloud-based contracts consistently provide a benefit to the customer during the subscription period; thus, the associated revenue is recognized ratably over the related subscription period. Revenue recognition begins on the later of the beginning of the subscription period or the date the customer is provided access to the cloud-based solutions.

Revenue from deliverable-based services is recognized as services are delivered. Revenue from fixed fee services is recognized as services are performed using the percentage of completion input method.

The Company has elected the "right to invoice" practical expedient for revenue related to services that are billed on an hourly basis, which enables revenue to be recognized as the services are performed.

The Company has determined that the methods applied to measuring its progress toward complete satisfaction of performance obligations recognized over time are a faithful depiction of the transfer of control of software subscriptions and services to customers.

Significant Judgments

Contracts with customers often include promises to transfer multiple products and services to a customer. Determining whether products and services are considered distinct performance obligations that should be accounted for separately versus together may require significant judgment. Identification of the amortization periods of material rights and contract costs requires significant judgement by management.

Payment terms

Payment terms and conditions vary by contract, although the Company’s terms generally include a requirement of payment within 30-days. In instances where the timing of revenue recognition differs from the timing of payment, the Company has determined that its contracts do not include a significant financing component. The primary purpose of invoicing terms is to provide customers with simplified and predictable ways of purchasing products and services, not to receive financing from customers or to provide customers with financing.

Cost of Revenues

Cost of revenues, software subscriptions includes the direct cost to develop, host and distribute software products, the direct cost to provide customer support, and amortization of costs capitalized for software developed for sale and for internal-use software utilized for cloud-based subscriptions. Cost of revenues, services includes the direct costs of implementation, training, transaction tax returns outsourcing and other tax-related services.

Reimbursable Costs

Reimbursable costs passed through and invoiced to customers of the Company are recorded as services revenues with the associated expenses recorded as cost of revenues, services in the condensed consolidated statements of comprehensive income (loss).

Income Taxes

Income Taxes

On July 27, 2020, the Company’s S-Corporation election (the “S Election”) was terminated by the Company’s stockholders in connection with the Offering. As a result, Vertex became taxable at the corporate level as a C-Corporation for U.S federal and state income tax purposes. In connection with the S Election termination, the Company entered into an agreement with the S-Corporation stockholders pursuant to which the Company has indemnified them for unpaid income tax liabilities and may be required to make future payments in material amounts to them attributable to incremental income taxes resulting from an adjustment to S-Corporation related taxable income (the “Tax Sharing Agreement”). In addition, the Tax Sharing Agreement indemnifies the S-Corporation stockholders for any interest, penalties, losses, costs or expenses arising out of any claim under the agreement. Correspondingly, the S-Corporation stockholders have indemnified the Company with respect to unpaid tax liabilities (including interest and penalties) attributable to a decrease in S-Corporation stockholders’ taxable income and a corresponding increase in our taxable income as a C-Corporation for any period.

Prior to July 27, 2020, as Vertex was taxed as an S-Corporation for U.S. federal and certain states income tax purposes, net income or loss was allocated to and included on the income tax returns of the S-Corporation stockholders. Historically, the Company distributed amounts to the S-Corporation stockholders to satisfy their tax liabilities resulting from allocated net income or loss. Vertex was taxed at the corporate level in those states where the S-Corporation status was not recognized or where the state imposed a tax on an S-Corporation. Accordingly, the income tax provision or benefit was based on taxable income allocated to these states. In certain foreign jurisdictions, Vertex subsidiaries were taxed at the corporate level, and the income tax provision or benefit was based on taxable income sourced to these foreign jurisdictions.

Supplemental Cash Flow Disclosures

Supplemental Cash Flow Disclosures

Supplemental cash flow disclosures are as follows for the respective periods:

	For the three months ended
	March 31,
	2021		2020
	(unaudited)
Cash paid for interest	$	69	$	559
Cash paid for income taxes	$	132	$	104
Operating cash flows from operating leases	$	1,320	$	—
Operating cash flows from finance leases	$	28	$	—
Non-cash investing and financing activities:
Purchase commitment and contingent consideration liabilities	$	2,200	$	14,344
Remeasurement of options for redeemable shares	$	—	$	15,242
Leased assets obtained in exchange for new finance lease liabilities	$	173	$	—

Recently Issued and Recently Adopted Accounting Pronouncements

Recently Issued Accounting Pronouncements

As an "emerging growth company," the Jumpstart Our Business Startups Act (the “JOBS Act”) allows the Company to delay adoption of new or revised accounting pronouncements applicable to public companies until such pronouncements are made applicable to private companies. The Company has elected to delay adoption of certain new or revised accounting standards. As a result, the Company’s financial statements may not be comparable to the financial statements of issuers who are required to comply with the effective date for new or revised accounting standards that are applicable to public companies.

Recently Adopted Accounting Pronouncements

Leases

In February 2016, the FASB issued ASU No. 2016-02, Leases. This standard amends several of aspects of lease accounting, including requiring lessees to recognize operating leases with a initial term greater than one year on their balance sheet as a right-of-use asset, and a corresponding lease liability, measured at the present value of the future minimum lease payments. The standard is effective for public entities for fiscal years and interim periods beginning after December 15, 2018. The standard is effective for all other entities for fiscal years beginning after December 15, 2021, and interim periods within fiscal years beginning after December 15, 2022, with early adoption permitted.

The Company adopted ASU No. 2016-02 on January 1, 2021 using the modified retrospective transition method, which did not require the Company to adjust comparative periods. The Company’s lease assets and lease liabilities are recognized on the lease commencement date in an amount that represents the present value of future lease payments. The Company’s incremental borrowing rate, which is based on information available at the adoption date for existing leases and the commencement date for leases commencing after the adoption date, is used to determine the present value of lease payments.

The Company elected the "package of three" practical expedients permitted under the transition guidance, which allows (i) a carry forward of the historical lease classification conclusions, (ii) management’s assessment on whether a contract is or contains a lease, and (iii) the initial direct costs for any leases that exist prior to adoption of the new standard.

As a result of the adoption of ASC 842 on January 1, 2021, the Company recorded both operating lease right-of-use assets of $24,004 and operating lease liabilities of $32,562. An adjustment to retained earnings of $508, net of the deferred tax impact, was also recorded. The adoption of ASC 842 had an immaterial impact on the condensed consolidated statements of comprehensive income and cash flows for the three months ended March 31, 2021. The adoption of this standard also resulted in a change in the naming convention for leases classified historically as capital leases. These leases are now referred to as finance leases within property and equipment, with corresponding short-term and long-term debt

liabilities being presented as “Current portion of finance lease liabilities” and “Finance lease liabilities, net of current portion”, respectively. See Note 7 for further information.

The Company does not recognize leases with an initial term less than one year (“short-term leases”) on its condensed consolidated balance sheets, and recognizes such lease payments in the condensed consolidated statements of comprehensive income (loss) on a straight-line basis over the lease term. Leases with an option to extend the related lease term or terminate early are reflected in the lease term when it is reasonably certain that the Company will exercise such options.

Credit Losses

In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, (“ASU 2016-13”) which replaces the existing incurred loss impairment model with an expected credit loss model and requires financial assets, including trade receivables, to be measured at amortized cost to be presented at the net amount expected to be collected. ASU 2016-13 is effective for annual periods, and interim periods within those years, beginning after December 15, 2019, for business entities that are public and meet the definition of an SEC filer (excluding smaller reporting companies), and after December 15, 2022 for all other entities. The Company adopted this standard effective January 1, 2021 and this guidance did not have a material impact on the Company’s condensed consolidated financial statements.

Income Taxes

In December 2019, the FASB issued ASU Update No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, (“ASU 2019-12”) which simplifies the accounting for income taxes. The guidance in ASU 2019-12 is required for annual reporting periods, including interim periods within those annual periods, beginning after December 15, 2020, for business entities that are public, and after December 15, 2021, including interim periods within those annual periods, for all other entities, with early adoption permitted.

The Company adopted this standard on January 1, 2021. There was no impact to the condensed consolidated financial statements from the implementation of this standard on the determination of income taxes for the quarter ended March 31, 2021.

Risks and Uncertainties

Risks and Uncertainties

In December 2019, a novel strain of coronavirus (“COVID-19”) appeared. In March 2020, the World Health Organization declared the outbreak of COVID-19 to be a pandemic. The COVID-19 pandemic is continuing to have widespread, rapidly evolving and unpredictable impacts on global society, economies, financial markets and business practices. To protect the health and well-being of Company employees and customers, substantial modifications were made to employee travel policies, our offices were closed, and remained closed through March 31, 2021, with employees directed to work from home. In addition, conferences and other marketing events were cancelled or shifted to virtual-only, and the Company continued to participate virtually through March 31, 2021. The COVID-19 pandemic has impacted and may continue to impact Company operations, including employees, customers and partners, and there is substantial uncertainty in the nature and degree of its continued effects over time.

The Company did not experience any significant reductions in sales, revenues or collections through March 31, 2021 as a result of COVID-19. The uncertainty caused by the COVID-19 pandemic could, however, impact Company billings to new customers for the remainder of 2021, and may also negatively impact Company efforts to expand revenues from existing customers as they continue to evaluate certain long-term projects and budget constraints. In addition to the potential impact on sales, the Company may see delays in collections during 2021 as customers adjust their operating protocols to accommodate implementation of new criteria to protect the health and well-being of their employees and customers. However, these delays are not expected to materially impact the business, and thus the Company has not recorded additional credit losses associated with the allowance for doubtful accounts in connection with any delays. The Company believes it has ample liquidity and capital resources to continue to meet its operating needs, and to service debt and other financial obligations.

The extent to which the COVID-19 pandemic impacts the business going forward will depend on numerous evolving factors that cannot reliably be predicted, including the duration and scope of the pandemic; governmental, business, and individuals’ actions in response to the pandemic; and the impact on economic activity, including the possibility of recession or financial market instability. These factors may adversely impact consumer, business and government spending on technology as well as customers’ ability to pay for Company products and services on an ongoing basis. This uncertainty also affects management’s accounting estimates and assumptions, which could result in greater variability in a variety of areas that depend on these estimates and assumptions, including estimated allowance for subscription cancellations, product life cycles and estimated lives of long-lived assets.

Reclassifications

Certain amounts in the  prior period financial statements have been reclassified to conform to the presentation of the current period financial statements. These reclassifications had no effect on previously reported comprehensive income or loss.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

3 Months Ended

Mar. 31, 2021

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Schedule of supplemental cash flow disclosures

	For the three months ended
	March 31,
	2021		2020
	(unaudited)
Cash paid for interest	$	69	$	559
Cash paid for income taxes	$	132	$	104
Operating cash flows from operating leases	$	1,320	$	—
Operating cash flows from finance leases	$	28	$	—
Non-cash investing and financing activities:
Purchase commitment and contingent consideration liabilities	$	2,200	$	14,344
Remeasurement of options for redeemable shares	$	—	$	15,242
Leased assets obtained in exchange for new finance lease liabilities	$	173	$	—

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REVENUE RECOGNITION (Tables)

3 Months Ended

Mar. 31, 2021

REVENUE RECOGNITION

Schedule of disaggregation of revenue

	Three months ended
	March 31,
		2021	2020
	(unaudited)
Sources of revenues:
Software subscriptions	$	83,280	$	75,760
Services		14,956		13,485
Total revenues	$	98,236	$	89,245

Schedule of beginning and ending balances of accounts receivable, net of allowance

	For the three months ended		For the year ended
	March 31, 2021		December 31, 2020
	(unaudited)
Balance, beginning of period	$	77,159	$	70,367
Balance, end of period		63,798		77,159
(Decrease) increase, net	$	(13,361)	$	6,792

Schedule of beginning and ending balances of and changes to the allowance and the deferred allowance

	For the three months ended March 31,
	2021				2020
	Balance			Net Change	Balance			Net Change
Allowance balance, January 1	$	(8,592)			$	(7,515)
Allowance balance, March 31		(8,059)				(7,476)
Change in allowance			$	(533)			$	(39)
Deferred allowance balance, January 1		6,432				5,614
Deferred allowance balance, March 31		5,515				5,118
Change in deferred allowance				917				496
Net amount charged to revenues			$	384			$	(457)

Schedule of information about the balances of and changes to deferred revenue

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Balances:
Deferred revenue, current	$	204,971	$	207,560
Deferred revenue, non-current		13,162		14,702
Total deferred revenue	$	218,133	$	222,262

	For the three months ended
	March 31,
	2021		2020
	(unaudited)
Changes to deferred revenue:
Beginning balance	$	222,262	$	205,791
Additional amounts deferred		94,107		84,938
Revenues recognized		(98,236)		(89,245)
Ending balance	$	218,133	$	201,484

Schedule of information about the changes to contract cost balances

	For the three months ended
	March 31,
	2021		2020
Deferred commissions:	(unaudited)
Beginning balance	$	11,743	$	11,196
Additions		2,058		1,972
Amortization		(2,108)		(2,605)
Ending balance	$	11,693	$	10,563

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BUSINESS COMBINATION (Tables)

3 Months Ended

Mar. 31, 2021

BUSINESS COMBINATION

Schedule of preliminary purchase price recorded in the Company's consolidated balance sheet as of the acquisition date

	January 25, 2021
	(unaudited)
Capitalized Software - Developed technology	$	3,600
Goodwill		4,700
Total	$	8,300

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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2021

FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS

Schedule of assets and liabilities measured at fair value on a recurring basis

	Fair Value Measurements Using
As of March 31, 2021	Fair Value		Prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Money market funds	$	225,215	$	225,215	$	-	$	-
Tellutax Contingent Consideration*	$	2,200	$	-	$	-	$	2,200
	Fair Value Measurements Using
As of December 31, 2020	Fair Value		Prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Money market funds	$	265,270	$	265,270	$	-	$	-

* As discussed in Note 3, this amount reflects the Tellutax Contingent Consideration for potential payments based on achievement of future revenue targets.

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PROPERTY AND EQUIPMENT (Tables)

3 Months Ended

Mar. 31, 2021

PROPERTY AND EQUIPMENT

Schedule of major components of property and equipment

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Leasehold improvements	$	20,901	$	20,907
Equipment		40,219		41,410
Computer software purchased		11,679		11,620
Internal-use software developed:
Cloud-based customer solutions		65,423		65,423
Internal systems and tools		28,886		25,349
Furniture and fixtures		7,676		7,674
In-process internal-use software		5,836		3,304
		180,620		175,687
Less accumulated depreciation		(123,212)		(119,130)
Property and equipment, net	$	57,408	$	56,557

Schedule of major components of internal-use software

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Internal-use software developed	$	94,309	$	90,772
Less accumulated depreciation		(68,463)		(65,090)
		25,846		25,682
In-process internal-use software		5,836		3,304
Internal-use software developed, net	$	31,682	$	28,986

Schedule of amounts capitalized for internal-use software and included in property and equipment additions on the consolidated statements of cash flows

	As of March 31,		As of March 31,
	2021		2020
	(unaudited)		(unaudited)
Cloud-based customer solutions	$	3,518	$	3,834
Internal systems and tools		2,551		382
Total	$	6,069	$	4,216

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CAPITALIZED SOFTWARE (Tables)

3 Months Ended

Mar. 31, 2021

CAPITALIZED SOFTWARE

Schedule of major components of capitalized software

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Capitalized software	$	64,515	$	63,071
Less accumulated amortization		(35,385)		(32,217)
		29,130		30,854
In-process capitalized software		5,512		1,135
Capitalized software, net	$	34,642	$	31,989

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LEASES (Tables)

3 Months Ended

Mar. 31, 2021

LEASES

Schedule of company's lease assets and lease liabilities and their balance sheet location

The following table sets forth the Company’s lease assets and liabilities and their balance sheet location as follows:

		As of March 31,
	Balance Sheet Location	2021
Lease assets:		(unaudited)
Operating lease right-of-use assets	Operating lease right-of-use assets	$	22,981
Finance lease assets	Property and equipment, net (Note 5)		1,309
Total lease assets		$	24,290
Lease liabilities:
Current:
Operating lease liabilities	Current portion of operating lease liabilities	$	4,665
Finance lease liabilities	Current portion of finance lease liabilities		267
Total current lease liabilities			4,932
Non-current:
Operating lease liabilities	Operating lease liabilities, net of current portion		26,671
Finance lease liabilities	Finance lease liabilities, net of current portion		334
Total non-current lease liabilities			27,005
Total lease liabilities		$	31,937

Schedule of company's lease costs, weighted-average term and rate

	For the three months ended
	March 31, 2021
	(unaudited)
Operating lease cost	$	1,169
Finance lease cost:
Amortization of lease assets		224
Interest on lease liabilities		7
Total lease cost	$	1,400

Schedule of maturity of operating lease liabilities

	As of March 31,
	2021
	(unaudited)
Weighted-average remaining lease term (years):
Operating leases		7.2
Finance leases		1.8
Weighted-average discount rate:
Operating leases		2.2	%
Finance leases		2.4	%

Lease liability maturities for the next five years and thereafter are as follows as of March 31, 2021:

	Operating Leases		Finance Leases
	(unaudited)
Remainder of 2021 (nine months remaining)	$	4,177	$	293
2022		4,529		289
2023		4,460		60
2024		4,464		10
2025		4,382		-
Thereafter		12,531		-
Total lease payments		34,543		652
Less: Imputed interest		(3,207)		(51)
Present value of lease liabilities	$	31,336	$	601

Schedule of maturity of finance lease liabilities

	Operating Leases		Finance Leases
	(unaudited)
Remainder of 2021 (nine months remaining)	$	4,177	$	293
2022		4,529		289
2023		4,460		60
2024		4,464		10
2025		4,382		-
Thereafter		12,531		-
Total lease payments		34,543		652
Less: Imputed interest		(3,207)		(51)
Present value of lease liabilities	$	31,336	$	601

Schedule of maturity of operating leases under ASU 840

Lease liability maturities for the next five years and thereafter under the previous lease accounting standard are as follows:

	As of December 31, 2020
	Operating Leases		Capital Leases
2021	$	5,442	$	915
2022		4,518		230
2023		4,459		—
2024		4,464		—
2025		4,382		—
Thereafter		12,531		—
Total Lease Payments	$	35,796		1,145
Less amount representing interest				(38)
Present value of minimum lease payments				1,107
Less current portion				(882)
Capital lease obligations, net of current portion			$	225

Schedule of maturity of capital leases under ASU 840

	As of December 31, 2020
	Operating Leases		Capital Leases
2021	$	5,442	$	915
2022		4,518		230
2023		4,459		—
2024		4,464		—
2025		4,382		—
Thereafter		12,531		—
Total Lease Payments	$	35,796		1,145
Less amount representing interest				(38)
Present value of minimum lease payments				1,107
Less current portion				(882)
Capital lease obligations, net of current portion			$	225

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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 2021

GOODWILL AND OTHER INTANGIBLE ASSETS

Changes in the carrying amount of goodwill

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Goodwill	$	19,529	$	16,329
Other intangible assets, net		2,024		2,382
	$	21,553	$	18,711

Balance, January 1, 2021	$	16,329
Acquisition of Tellutax (Note 3)		4,700
Foreign currency translation adjustments		(1,500)
Balance, March 31, 2021, gross		19,529
Accumulated impairment losses		—
Balance, March 31, 2021, net	$	19,529

Schedule of acquired intangible assets

	As of March 31,		As of December 31,
	2021		2020
	(unaudited)
Other intangible assets
Weighted average amortization period (years)		5.5		5.5
Gross value	$	2,566	$	2,825
Accumulated amortization		(542)		(443)
Carrying value	$	2,024	$	2,382

Schedule of future amortization expense

	For the three months ended March 31, 2021
	Cost of Revenues, Software Subscriptions		Selling and Marketing Expense		Total Expense
Amortization of acquired intangible assets	$	61	$	84	$	145

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EARNINGS PER SHARE (Tables)

3 Months Ended

Mar. 31, 2021

EARNINGS PER SHARE

Schedule of earnings per share basic and diluted

	For the Three Months Ended March 31,
Class A common stock:	2021			2020
	(unaudited)
Numerator, basic:
Net income (loss) attributable to all stockholders	$	2,288		$	(29,064)
Class A common stock as a percentage of total shares outstanding, basic		18.05	%		—	%
Net income attributable to Class A stockholders, basic	$	413		$	—
Numerator, diluted:
Net income (loss) attributable to all stockholders	$	2,288		$	(29,064)
Class A common stock as a percentage of total shares outstanding, diluted		24.06	%		—	%
Net income attributable to Class A stockholders, diluted	$	550		$	—
Denominator, basic and diluted:
Weighted average Class A common stock, basic		26,458			—
Dilutive effect of common stock equivalents*		11,545			—
Weighted average Class A common stock, diluted		38,003			—
Net income per Class A share, basic	$	0.02		$	—
Net income per Class A share, diluted	$	0.01		$	—

	For the Three Months Ended March 31,
Class B common stock:	2021			2020
	(unaudited)
Numerator, basic:
Net income (loss) attributable to all stockholders	$	2,288		$	(29,064)
Class B common stock as a percentage of total shares outstanding, basic		81.95	%		100.00	%
Net income (loss) attributable to Class B stockholders, basic	$	1,875		$	(29,064)
Numerator, diluted:
Net income (loss) attributable to all stockholders	$	2,288		$	(29,064)
Class B common stock as a percentage of total shares outstanding, diluted		75.94	%		100.00	%
Net income (loss) attributable to Class B stockholders, diluted	$	1,738		$	(29,064)
Denominator, basic and diluted:
Weighted average Class B common stock, basic		120,117			120,417
Dilutive effect of common stock equivalents		—			—
Weighted average Class B common stock, diluted		120,117			120,417
Net income (loss) per Class B share, basic	$	0.02		$	(0.24)
Net income (loss) per Class B share, diluted	$	0.01		$	(0.24)

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STOCK-BASED AWARD PLANS (Tables)

3 Months Ended

Mar. 31, 2021

Compensation plans:

Schedule of ESPP valuation assumptions

	Current
	Offering Period
Fair market value of common stock	$	25.83
Volatility		35.00	%
Expected term (years)		0.50
Expected dividend yield		-	%
Risk-free interest rate		0.11	%

Schedule of stock-based compensation cost related to incentive awards

	March 31,
	2021		2020
Stock-based compensation expense:
SARs and Converted SARs	$	3,391	$	34,920
Stock options		377		-
RSUs		436		-
RSAs		2,209		-
ESPP		130		-
Total stock-based compensation expense	$	6,543	$	34,920

Schedule of stock based compensation cost in consolidated statement of operations

	March 31,
	2021		2020
Stock-based compensation expense:
Cost of revenues, software subscriptions	$	560	$	3,492
Cost of revenues, services		594		5,238
Research and development		561		3,492
Selling and marketing		1,287		6,984
General and administrative		3,541		15,714
Total stock-based compensation expense	$	6,543	$	34,920

2020 Plan

Compensation plans:

Schedule of Option activity

				Weighted
			Weighted	Average
			Average	Remaining	Aggregate
			Exercise	Contractual	Intrinsic
2020 Plan Option Activity	Units		Price	Life (Years)	Value
Outstanding at January 1, 2021	11,876		—
Granted	251	$	32.16
Forfeited	(156)	$	3.30
Exercised	(996)	$	2.18		$	23,220
2020 Plan options outstanding at March 31, 2021	10,975	$	3.13	5.26	$	206,866
2020 Plan options exercisable at March 31, 2021	6,574	$	1.79	3.56	$	132,747

Schedule of outstanding, vested and exercisable

	Options Outstanding		Options Vested and Exercisable
		Weighted		Weighted
		Average		Average
Exercise Prices	Units	Life (Years)	Units	Life (Years)
$0.15 to $0.71	2,382	*	2,382	—
$2.15	863	3.9	863	3.9
$2.50	2,475	5.2	1,846	5.1
$2.67	660	5.9	283	5.9
$3.17	1,486	7.0	735	7.1
$3.73	2,175	8.5	465	8.2
$4.70	683	8.9	—	—
$32.16	251	9.9	—	—
	10,975		6,574

Schedule of valuation assumptions

Fair market value of common stock	$	32.16
Volatility		36.8	%
Expected term (years)		6.0
Expected dividend yield		—	%
Risk-free interest rate		0.4	%

Restricted Stock Units

Compensation plans:

Schedule of restricted activity

		Weighted
		Average
		Grant Date Fair
	Units	Value Per Share
Outstanding at January 1, 2021	101	$	23.80
Granted	281		32.22
Vested	(6)		35.09
Forfeited	—		—
Outstanding at March 31, 2021	376	$	30.51

Restricted Stock Awards

Compensation plans:

Schedule of restricted activity

		Weighted
		Average
		Grant Date Fair
	Units	Value Per Share
Outstanding at January 1, 2021	670	$	19.00
Granted	—		—
Vested	—		—
Forfeited	(7)		19.00
Outstanding at March 31, 2021	663	$	19.00

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Basis of Consolidation (Details)	Jan. 07, 2020
Systax
Summary of significant accounting policies
Interest acquired (as a percent)	60.00%

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Segments (Details) - segment	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment information:
Operating segments	1
Revenue | Geographic Concentration Risk | Outside United States
Segment information:
Risk percentage	5.00%	3.00%

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Useful life (Details)	3 Months Ended
	Mar. 31, 2021
Internal-Use Software | Minimum
Property and equipment
Estimated useful lives (in years)	3 years
Internal-Use Software | Maximum
Property and equipment
Estimated useful lives (in years)	5 years
Software developed for sale | Minimum
Property and equipment
Estimated useful lives (in years)	3 years
Software developed for sale | Maximum
Property and equipment
Estimated useful lives (in years)	5 years

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Stock-Based Compensation (Details)	3 Months Ended
	Mar. 31, 2021
ESPP
Compensation plans:
Discount	15.00%

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition (Details)	3 Months Ended
	Mar. 31, 2021
Deferred revenue recognition:
Payment terms (in days)	30-days
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-03-31
Deferred revenue recognition:
Revenue recognition period	3 years

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Supplemental Cash Flow Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Cash paid for Interest	$ 69	$ 559
Cash paid for income taxes	132	104
Operating cash flows from operating leases	1,320
Operating cash flows from finance leases	28
Non-cash investing and financing activities:
Purchase commitment and contingent consideration liabilities	2,200	14,344
Remeasurement of options for redeemable shares		$ 15,242
Leased assets obtained in exchange for new finance lease liabilities	$ 173

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recently Issued Accounting Pronouncements (Details) - USD ($) $ in Thousands	Jan. 01, 2021	Mar. 31, 2021	Dec. 31, 2020
Recently issued accounting prnouncements
Lease, Practical Expedients, Package [true false]	true
Operating lease right-of-use assets		$ 22,981
Operating lease liabilities		31,336
Retained earnings		$ 24,722	$ 21,926
ASC 842
Recently issued accounting prnouncements
Operating lease right-of-use assets	$ 24,004
Operating lease liabilities	32,562
Retained earnings	$ 508

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REVENUE RECOGNITION - Disaggregation of revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of revenue:
Revenues	$ 98,236	$ 89,245
Software subscriptions
Disaggregation of revenue:
Revenues	83,280	75,760
Services
Disaggregation of revenue:
Revenues	$ 14,956	$ 13,485

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REVENUE RECOGNITION - Accounts receivable, net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
REVENUE RECOGNITION
Allowance for accounts receivable	$ 8,059	$ 7,476	$ 8,592	$ 7,515
Allowance for credit loss
Balance, beginning of period	77,159	70,367
Balance, end of period	63,798	77,159
(Decrease) increase, net	$ (13,361)	$ 6,792

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REVENUE RECOGNITION - Allowance and deferred allowance (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Allowance for credit loss
Allowance balance, January 1	$ (8,592)	$ (7,515)
Allowance balance, March 31	(8,059)	(7,476)
Change in allowance	(533)	(39)
Deferred allowance balance, January 1	6,432	5,614
Deferred allowance balance, March 31	5,515	5,118
Change in deferred allowance	917	496
Net amount charged to revenues	$ 384	$ (457)

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REVENUE RECOGNITION - Deferred revenue (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
REVENUE RECOGNITION
Deferred revenue, current	$ 204,971	$ 207,560
Deferred revenue, non-current	13,162	14,702
Total deferred revenue	$ 218,133	$ 222,262	$ 201,484	$ 205,791

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REVENUE RECOGNITION - Changes to deferred revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
REVENUE RECOGNITION
Beginning balance	$ 222,262	$ 205,791
Additional amounts deferred	94,107	84,938
Revenues recognized	(98,236)	(89,245)
Ending balance	$ 218,133	$ 201,484

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REVENUE RECOGNITION - Contract cost balances (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Changes to deferred commissions:
Beginning balance	$ 11,743	$ 11,196
Additions	2,058	1,972
Amortization	(2,108)	(2,605)
Ending balance	11,693	10,563
Impairment loss	$ 0	$ 0
Contract costs, amortization period	3 years

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BUSINESS COMBINATION (Details) $ in Thousands	Jan. 25, 2021 USD ($) payment	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Preliminary purchase price allocation
Goodwill.		$ 19,529	$ 16,329
Tellutax
Acquisition
Payments to acquire business	$ 6,100
Contingent consideration	$ 2,200
Number of potential earnout payments | payment	3
Revenue achievement period	30 months
Maximum limit on earnout payments	$ 0
Preliminary purchase price allocation
Capitalized Software - Developed technology	3,600
Goodwill.	4,700
Total	$ 8,300

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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands	Jan. 25, 2021	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Recurring
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Money market funds		$ 225,215	$ 265,270
Tellutax purchase commitment liability		2,200
Prices in active markets for identical assets (Level 1) | Fair Value, Recurring
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Money market funds		225,215	$ 265,270
Significant unobservable inputs (Level 3) | Fair Value, Recurring
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Tellutax purchase commitment liability		$ 2,200
Tellutax
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Payments to acquire business	$ 6,100
Contingent consideration	$ 2,200

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PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Property and equipment
Property and equipment, gross	$ 180,620	$ 175,687
Less accumulated depreciation	(123,212)	(119,130)
Property and equipment, net	57,408	56,557
Leasehold improvements
Property and equipment
Property and equipment, gross	20,901	20,907
Equipment
Property and equipment
Property and equipment, gross	40,219	41,410
Computer software purchased
Property and equipment
Property and equipment, gross	11,679	11,620
Internal-Use Software
Property and equipment
Property and equipment, gross	94,309	90,772
Less accumulated depreciation	(68,463)	(65,090)
Property and equipment, net	31,682	28,986
Cloud-based customer solutions
Property and equipment
Property and equipment, gross	65,423	65,423
Internal systems and tools
Property and equipment
Property and equipment, gross	28,886	25,349
Furniture and fixtures
Property and equipment
Property and equipment, gross	7,676	7,674
In-process internal-use software
Property and equipment
Property and equipment, gross	$ 5,836	$ 3,304

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PROPERTY AND EQUIPMENT - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Property and equipment
Finance lease amortization	$ 224
Property and equipment	57,408		$ 56,557
Accumulated depreciation	123,212		119,130
Research and development costs	11,459	$ 13,079
Excluding internal-use software and capital leases
Property and equipment
Depreciation expense	1,906	2,175
Assets under finance leases
Property and equipment
Property and equipment	1,533
Accumulated depreciation	224
Assets under capital leases
Property and equipment
Finance lease amortization	224
Property and equipment		1,360
Accumulated depreciation		1,369
Depreciation expense		168
Internal systems and tools
Property and equipment
Depreciation expense	697	526
Internal-Use Software
Property and equipment
Property and equipment	31,682		28,986
Accumulated depreciation	68,463		$ 65,090
Depreciation expense	$ 2,676	$ 2,011

XML

PROPERTY AND EQUIPMENT - Major components of internal-use software (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Property and equipment
Property and equipment, gross	$ 180,620	$ 175,687
Less accumulated depreciation	(123,212)	(119,130)
Property and equipment	57,408	56,557
Internal-Use Software
Property and equipment
Property and equipment, gross	94,309	90,772
Less accumulated depreciation	(68,463)	(65,090)
Property and equipment, net excluding in-process internal-use software	25,846	25,682
Property and equipment	31,682	28,986
In-process internal-use software
Property and equipment
Property and equipment, gross	$ 5,836	$ 3,304

XML

PROPERTY AND EQUIPMENT - Amounts capitalized for internal-use software and included in property and equipment additions on the consolidated statements of cash flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Property and equipment
Capitalized internal-use software	$ 6,195	$ 5,632
Internal-Use Software
Property and equipment
Capitalized internal-use software	6,069	4,216
Cloud-based customer solutions
Property and equipment
Capitalized internal-use software	3,518	3,834
Internal systems and tools
Property and equipment
Capitalized internal-use software	$ 2,551	$ 382

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CAPITALIZED SOFTWARE (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Software
Capitalized software additions	$ 3,600
Capitalized software, net	34,642		$ 31,989
Capitalized software amortization expense	3,168	$ 2,556
Software
Software
Capitalized development costs	2,221	$ 3,706
Capitalized software, gross	64,515		63,071
Less accumulated amortization	(35,385)		(32,217)
Capitalized software, net	29,130		30,854
In-process internal-use software
Software
Capitalized software, gross	$ 5,512		$ 1,135

XML

LEASES (Details)	3 Months Ended
	Mar. 31, 2021
Maximum
Remaining lease term (in years)	9 years

XML

LEASES - Lease Assets and Liabilities (Details) $ in Thousands	Mar. 31, 2021 USD ($)
Lease assets:
Operating lease right-of-use assets	$ 22,981
Finance lease assets	$ 1,309
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, Plant and Equipment, Net
Total lease assets	$ 24,290
Current:
Operating lease liabilities	4,665
Finance lease liabilities	267
Total current lease liabilities	4,932
Non-current:
Operating lease liabilities, non-current	26,671
Finance lease liabilities, non-current	334
Total non-current lease liabilities	27,005
Total lease liabilities	$ 31,937

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LEASES - Lease Costs, Weighted Average Term and Rates (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)
Lease Cost, Weighted average term and discount rate:
Operating lease cost	$ 1,169
Amortization of lease assets	224
Interest on lease liabilities	7
Total lease cost	$ 1,400
Operating leases, weighted-average remaining lease term (in years)	7 years 2 months 12 days
Finance leases, weighted-average remaining lease term (in years)	1 year 9 months 18 days
Operating leases, weighted-average discount rate	2.20%
Finance leases, weighted-average discount rate	2.40%

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LEASES - Future Maturity of Lease Liabilities (Details) $ in Thousands	Mar. 31, 2021 USD ($)
Operating Leases
Remainder of 2021 (nine months remaining)	$ 4,177
2022	4,529
2023	4,460
2024	4,464
2025	4,382
Thereafter	12,531
Total lease payments	34,543
Less: Imputed Interest	(3,207)
Present value of lease liabilities	31,336
Finance Leases
Remainder of 2021 (nine months remaining)	293
2022	289
2023	60
2024	10
Total lease payments	652
Less: Imputed Interest	(51)
Present value of lease liabilities	$ 601

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LEASES - Future Maturity of Lease Liabilities under ASU 840 (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Operating Leases
2021	$ 5,442
2022	4,518
2023	4,459
2024	4,464
2025	4,382
Thereafter	12,531
Total Lease Payments	35,796
Capital Leases
2021	915
2022	230
Total Lease Payments	1,145
Less amount representing interest	(38)
Present value of minimum lease payments	1,107
Less current portion	(882)
Capital lease obligations, net of current portion	$ 225

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GOODWILL AND OTHER INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
GOODWILL AND OTHER INTANGIBLE ASSETS
Goodwill.	$ 19,529	$ 16,329
Other intangible assets, net	2,024	2,382
Goodwill and other intangible assets	$ 21,553	$ 18,711

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GOODWILL AND OTHER INTANGIBLE ASSETS - Changes (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)
GOODWILL AND OTHER INTANGIBLE ASSETS
Balance, January 1, 2021	$ 16,329
Acquisition of Tellutax (Note 3)	4,700
Foreign currency translation adjustments	(1,500)
Balance, March 31, 2021, net	19,529
Balance, March 31, 2021, gross	$ 19,529

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GOODWILL AND OTHER INTANGIBLE ASSETS - Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Other intangible assets
Carrying Value	$ 2,024	$ 2,382
Amortization of acquired intangible assets
Amortization	145
Cost of Revenues
Amortization of acquired intangible assets
Amortization	61
Selling and marketing
Amortization of acquired intangible assets
Amortization	$ 84
Other intangible assets
Other intangible assets
Weighted Average Amortization Period (Years)	5 years 6 months	5 years 6 months
Gross Value	$ 2,566	$ 2,825
Accumulated Amortization	(542)	(443)
Carrying Value	$ 2,024	$ 2,382

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DEBT - Credit Agreement (Details) - USD ($) $ in Thousands		3 Months Ended
	Jul. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Apr. 03, 2020
Debt
Principal payments on long-term debt			$ 51,041
Base rate
Debt
Interest rate		3.25%
LIBOR
Debt
Interest rate		2.00%
Term Loan
Debt
Face amount					$ 175,000
Principal payments on long-term debt	$ 175,000
Line of Credit
Debt
Line of credit, capacity					$ 100,000
Line of credit, outstanding borrowings		$ 0		$ 0
In covenant compliance		True

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STOCKHOLDERS EQUITY (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
	Jul. 28, 2020	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Common Stock
Forward Stock Split	three-for-one
Stock split		0.33
Treasury stock		0		0
Liquidation preferences	$ 0		$ 0
Common Stock, Shares Authorized	450,000
Common stock par value (in dollars per share)	$ 0.001
Preferred Stock, Shares Authorized	30,000	30,000		30,000
Preferred Stock, Par or Stated Value Per Share	$ 0.001	$ 0.001		$ 0.001
Distributions			$ 4,010
Distributions per share			$ 0.03
Former Class A
Common Stock
Common Stock, Shares, Outstanding			147
Former Class B
Common Stock
Common Stock, Shares, Outstanding			120,270
Class A
Common Stock
Common Stock, Shares, Outstanding		26,972		26,327
Common Stock, Shares Authorized	300,000	300,000		300,000
Common stock par value (in dollars per share)		$ 0.001		$ 0.001
Common Stock, Voting Rights	one
Class A | Selling stockholders
Common Stock
Auto exercised options in connection with offering shares issued		640
Shares exchanged in lieu		356
Class B
Common Stock
Common Stock, Shares, Outstanding		120,117		120,117
Common Stock, Shares Authorized	150,000	150,000		150,000
Common stock par value (in dollars per share)		$ 0.001		$ 0.001
Common Stock, Voting Rights	ten
S Corporation
Common Stock
Amount of estimated dividends liability		$ 2,700		$ 2,700

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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator:
Net income (loss) attributable to all stockholders	$ 2,288	$ (29,064)
Denominator:
Anti-dilutive shares	84	3,734
Class A
Numerator:
Common stock as a percentage of total shares outstanding, basic	18.05%
Net income (loss) attributable to stockholders, basic	$ 413
Common stock as a percentage of total shares outstanding, diluted	24.06%
Net (loss) income attributable to stockholders, diluted	$ 550
Denominator:
Weighted average common stock, basic	26,458
Dilutive effect of common stock equivalents	11,545
Weighted average common stock, diluted	38,003
Net income (loss) per share, basic	$ 0.02
Net (loss) income per share, diluted	$ 0.01
Class B
Numerator:
Common stock as a percentage of total shares outstanding, basic	81.95%	100.00%
Net income (loss) attributable to stockholders, basic	$ 1,875	$ (29,064)
Common stock as a percentage of total shares outstanding, diluted	75.94%	100.00%
Net (loss) income attributable to stockholders, diluted	$ 1,738	$ (29,064)
Denominator:
Weighted average common stock, basic	120,117	120,417
Weighted average common stock, diluted	120,117	120,417
Net income (loss) per share, basic	$ 0.02	$ (0.24)
Net (loss) income per share, diluted	$ 0.01	$ (0.24)

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STOCK-BASED AWARD PLANS - Stock-Based Award Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Compensation plans:
Accrued salaries and benefits	$ 18,065	$ 17,326
ESPP
Compensation plans:
Offering Period	6 months
Accrued salaries and benefits	$ 810

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STOCK-BASED AWARD PLANS - 2020 Plan (Details) shares in Thousands	Mar. 31, 2021 shares
2020 Plan
Compensation plans:
Shares authorized	1,857

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STOCK-BASED AWARD PLANS - Amended Options (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Compensation plans:
Remeasurement of options for redeemable shares		$ 15,242
Compensation expense	$ 6,543	34,920
Amended Options
Compensation plans:
Remeasurement of options for redeemable shares		$ 15,242
Option Outstanding		3,849
Compensation expense	$ 377	$ 0

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STOCK-BASED AWARD PLANS - Options under 2020 Plan (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Weighted Average Per Share
Compensation expense	$ 6,543	$ 34,920
2020 Plan
Units
Balance, Bgn	11,876
Granted	251
Forfeited	(156)
Exercised	(996)
Balance, End	10,975	0
Exercisable	6,574
Weighted Average Per Share
Granted	$ 32.16
Forfeited	3.30
Exercised	2.18
Balance, End	3.13
Exercisable	$ 1.79
Remaining contractual life, outstanding	5 years 3 months 3 days
Remaining contractual life, exercisable	3 years 6 months 21 days
Intrinsic value, exercised	$ 23,220
Intrinsic value, outstanding	206,866
Intrinsic value, exercisable	$ 132,747
Vesting period	10 years
Compensation expense	$ 3,768
Unrecognized compensation expense	$ 30,605
Unrecognized compensation expense period	3 years 7 months 6 days
2020 Plan | Minimum
Weighted Average Per Share
Vesting period	1 year
2020 Plan | Maximum
Weighted Average Per Share
Vesting period	4 years

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STOCK-BASED AWARD PLANS - Options under 2020 Plan Price Range (Details) - 2020 Plan shares in Thousands	3 Months Ended
	Mar. 31, 2021 $ / shares shares
Options outstanding, vested and exercisable:
Options outstanding	10,975
Options vested and exercisable	6,574
$0.15 to $0.71
Options outstanding, vested and exercisable:
Exercise prices, lower range | $ / shares	$ 0.15
Exercise prices, upper range | $ / shares	$ 0.71
Options outstanding	2,382
Options outstanding, life	0 years
Options vested and exercisable	2,382
$2.15
Options outstanding, vested and exercisable:
Exercise prices | $ / shares	$ 2.15
Options outstanding	863
Options outstanding, life	3 years 10 months 24 days
Options vested and exercisable	863
Options vested and exercisable, life	3 years 10 months 24 days
$2.50
Options outstanding, vested and exercisable:
Exercise prices | $ / shares	$ 2.50
Options outstanding	2,475
Options outstanding, life	5 years 2 months 12 days
Options vested and exercisable	1,846
Options vested and exercisable, life	5 years 1 month 6 days
$2.67
Options outstanding, vested and exercisable:
Exercise prices | $ / shares	$ 2.67
Options outstanding	660
Options outstanding, life	5 years 10 months 24 days
Options vested and exercisable	283
Options vested and exercisable, life	5 years 10 months 24 days
$3.17
Options outstanding, vested and exercisable:
Exercise prices | $ / shares	$ 3.17
Options outstanding	1,486
Options outstanding, life	7 years
Options vested and exercisable	735
Options vested and exercisable, life	7 years 1 month 6 days
$3.73
Options outstanding, vested and exercisable:
Exercise prices | $ / shares	$ 3.73
Options outstanding	2,175
Options outstanding, life	8 years 6 months
Options vested and exercisable	465
Options vested and exercisable, life	8 years 2 months 12 days
$4.70
Options outstanding, vested and exercisable:
Exercise prices | $ / shares	$ 4.70
Options outstanding	683
Options outstanding, life	8 years 10 months 24 days
$32.16
Options outstanding, vested and exercisable:
Exercise prices | $ / shares	$ 32.16
Options outstanding	251
Options outstanding, life	9 years 10 months 24 days

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STOCK-BASED AWARD PLANS - Options under 2020 Plan Options issued (Details) - 2020 Plan	3 Months Ended
	Mar. 31, 2021 $ / shares
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Fair market value of common stock	$ 32.16
Volatility	36.80%
Expected term (in years)	6 years
Risk-free interest rate	0.40%

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STOCK-BASED AWARD PLANS - Restricted Stock Units (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Compensation plans:
Compensation expense	$ 6,543	$ 34,920
Restricted Stock Units
Compensation plans:
Compensation expense	$ 436
Service requirement (in years)	4 years
Unrecognized compensation cost	$ 10,775
Unrecognized compensation expense period	3 years 9 months 18 days
Units
Balance, Bgn	101
Granted	281
Vested	(6)
Balance, End	376	0
Weighted Average Per Share
Balance, Bgn	$ 23.80
Granted	32.22
Vested	35.09
Balance, End	$ 30.51
Restricted Stock Units | Minimum
Compensation plans:
Service requirement (in years)	1 year

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STOCK-BASED AWARD PLANS - Restricted Stock Awards (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Weighted Average Per Share
Stock-based compensation expense	$ 6,543	$ 34,920
Restricted Stock Awards
Units
Balance, Bgn	670
Forfeited	(7)
Balance, End	663	0
Weighted Average Per Share
Balance, Bgn	$ 19.00
Forfeited	19.00
Balance, End	$ 19.00
Stock-based compensation expense	$ 2,209
Unrecognized compensation cost	$ 6,588
Unrecognized compensation expense period	2 years 4 months 24 days
Restricted Stock Awards | Minimum
Compensation plans:
Service requirement (in years)	1 year
Restricted Stock Awards | Maximum
Compensation plans:
Service requirement (in years)	4 years

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STOCK-BASED AWARD PLANS - Employee Stock Purchase Plan (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Compensation plans:
Compensation expense	$ 6,543	$ 34,920
ESPP
Compensation plans:
Purchase price as a percent of fair value	85.00%
Reserved for issuance	1,000
Maximum issuance (as a percentage of outstanding)	1.00%
Maximum issuance (in shares)	16,000
Compensation expense	$ 130
Unrecognized compensation cost	$ 88
ESPP | Class A
Compensation plans:
Shares purchased	0

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STOCK-BASED AWARD PLANS - ESPP - Option-pricing model key input assumptions (Details) - ESPP	3 Months Ended
	Mar. 31, 2021 $ / shares
Compensation plans:
Discount	15.00%
Offering Period	6 months
Fair Value Assumptions and Methodology
Fair market value of common stock	$ 25.83
Volatility	35.00%
Expected term (in years)	6 months
Risk-free interest rate	0.11%

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STOCK-BASED AWARD PLANS - Stock based compensation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Allocation of costs
Compensation expense	$ 6,543	$ 34,920
SAR
Allocation of costs
Compensation expense	3,391	34,920
Amended Options
Allocation of costs
Compensation expense	377	$ 0
Restricted Stock Units
Allocation of costs
Compensation expense	436
Restricted Stock Awards
Allocation of costs
Compensation expense	2,209
ESPP
Allocation of costs
Compensation expense	$ 130

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STOCK-BASED AWARD PLANS - Stock based compensation, comprehensive income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Allocation of costs
Compensation expense	$ 6,543	$ 34,920
Research and development
Allocation of costs
Compensation expense	561	3,492
Selling and marketing
Allocation of costs
Compensation expense	1,287	6,984
General and administrative
Allocation of costs
Compensation expense	3,541	15,714
Software subscriptions
Allocation of costs
Compensation expense	560	3,492
Services
Allocation of costs
Compensation expense	$ 594	$ 5,238

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SUBSEQUENT EVENTS (Details) $ in Thousands	May 12, 2021 USD ($)
EVAT Solutions Limited | Subsequent event
Business Acquisition [Line Items]
Cash consideration	$ 200,000