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 September 30, 2019

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: 001-37874

Everbridge, Inc.

(Exact Name of Registrant as Specified in its Charter)

Delaware	26-2919312
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
25 Corporate Drive, Suite 400 Burlington, Massachusetts	01803
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (818) 230-9700

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

Title of each class	Trading symbol(s)	Name of each exchange on which registered
Common Stock, $0.001 par value per share	EVBG	The Nasdaq Capital Market

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	☐	Smaller 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  ☒

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practical date.

As of November 4, 2019, the registrant had 33,790,452 shares of common stock issued and outstanding.

EVERBRIDGE, INC. AND SUBSIDIARIES

		Page
PART I.	FINANCIAL INFORMATION	3
Item 1.	Condensed Consolidated Financial Statements (unaudited)	3
	Condensed Consolidated Balance Sheets	3
	Condensed Consolidated Statements of Operations	4
	Condensed Consolidated Statements of Comprehensive Loss	5
	Condensed Consolidated Statements of Stockholders’ Equity	6
	Condensed Consolidated Statements of Cash Flows	8
	Notes to the Condensed Consolidated Financial Statements	9
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	31
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	44
Item 4.	Controls and Procedures	45
PART II.	OTHER INFORMATION	47
Item 1.	Legal Proceedings	47
Item 1A.	Risk Factors	47
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	47
Item 3.	Defaults Upon Senior Securities	47
Item 4.	Mine Safety Disclosures	47
Item 5.	Other Information	47
Item 6.	Exhibits	48
Signatures		49

2

PART I—FINANCIAL INFORMATION

Item 1. Condensed Consolidated Financial Statements (Unaudited).

EVERBRIDGE, INC. AND SUBSIDIARIES

Condensed Consolidated Balance Sheets

(in thousands, except share data)

(unaudited)

	September 30, 2019			December 31, 2018
Assets
Current assets:
Cash and cash equivalents	$	194,742		$	59,978
Restricted cash		1,026			90
Short-term investments		—			45,541
Accounts receivable, net		51,824			41,107
Prepaid expenses		10,347			4,890
Deferred costs and other current assets		10,548			10,909
Total current assets		268,487			162,515
Property and equipment, net		6,029			4,650
Capitalized software development costs, net		14,092			12,893
Goodwill		90,706			48,382
Intangible assets, net		70,624			23,197
Restricted cash		3,347			—
Deferred costs and other assets		26,423			10,543
Total assets	$	479,708		$	262,180
Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable	$	8,832		$	2,719
Accrued payroll and employee related liabilities		19,674			17,108
Accrued expenses		5,481			5,565
Deferred revenue		112,058			92,738
Note payable		—			427
Other current liabilities		6,482			1,490
Total current liabilities		152,527			120,047
Long-term liabilities:
Deferred revenue, noncurrent		4,371			2,898
Convertible senior notes		97,764			94,097
Deferred tax liabilities		1,197			1,032
Other long term liabilities		12,751			1,948
Total liabilities		268,610			220,022
Commitments and contingencies
Stockholders' equity:
Preferred stock, par value $0.001, 10,000,000 shares authorized, no shares issued or outstanding as of   September 30, 2019 and December 31, 2018, respectively		—			—
Common stock, $0.001 par value, 100,000,000 shares authorized, 33,778,616 and 29,700,192    shares issued and outstanding as of September 30, 2019 and December 31, 2018, respectively		34			30
Additional paid-in capital		404,676			194,866
Accumulated deficit		(186,788	)		(147,670	)
Accumulated other comprehensive loss		(6,824	)		(5,068	)
Total stockholders’ equity		211,098			42,158
Total liabilities and stockholders’ equity	$	479,708		$	262,180

See accompanying notes to condensed consolidated financial statements.

3

EVERBRIDGE, INC. AND SUBSIDIARIES

Condensed Consolidated Statements of Operations

(in thousands, except share and per share data)

(unaudited)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Revenue	$	52,547		$	38,925		$	143,771		$	105,266
Cost of revenue		16,454			12,296			45,174			33,488
Gross profit		36,093			26,629			98,597			71,778
Operating expenses:
Sales and marketing		21,903			16,348			63,989			51,303
Research and development		12,877			10,350			37,164			30,548
General and administrative		13,435			7,130			34,457			23,609
Total operating expenses		48,215			33,828			135,610			105,460
Operating loss		(12,122	)		(7,199	)		(37,013	)		(33,682	)
Other income (expense), net:
Interest and investment income		1,032			460			3,541			1,316
Interest expense		(1,697	)		(1,592	)		(4,986	)		(4,736	)
Other expense, net		(35	)		(33	)		(129	)		(237	)
Total other income (expense), net		(700	)		(1,165	)		(1,574	)		(3,657	)
Loss before income taxes		(12,822	)		(8,364	)		(38,587	)		(37,339	)
Provision for income taxes		(99	)		(86	)		(531	)		(371	)
Net loss	$	(12,921	)	$	(8,450	)	$	(39,118	)	$	(37,710	)
Net loss per share attributable to common stockholders:
Basic	$	(0.39	)	$	(0.29	)	$	(1.19	)	$	(1.30	)
Diluted	$	(0.39	)	$	(0.29	)	$	(1.19	)	$	(1.30	)
Weighted-average common shares outstanding:
Basic		33,524,771			29,460,156			32,941,826			28,918,304
Diluted		33,524,771			29,460,156			32,941,826			28,918,304

See accompanying notes to condensed consolidated financial statements.

4

EVERBRIDGE, INC. AND SUBSIDIARIES

Condensed Consolidated Statements of Comprehensive Loss

(in thousands)

(unaudited)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Net loss	$	(12,921	)	$	(8,450	)	$	(39,118	)	$	(37,710	)
Other comprehensive income (loss):
Foreign currency translation adjustment, net of taxes		(2,049	)		81			(1,756	)		(2,570	)
Total comprehensive loss	$	(14,970	)	$	(8,369	)	$	(40,874	)	$	(40,280	)

See accompanying notes to condensed consolidated financial statements.

5

EVERBRIDGE, INC. AND SUBSIDIARIES

Condensed Consolidated Statements of Stockholders’ Equity

(in thousands, except share data)

(unaudited)

	Common stock					Additional paid-in			Accumulated			Accumulated- other comprehensive
	Shares			Par value		capital			deficit			income (loss)			Total
Balance at December 31, 2018		29,700,192		$	30	$	194,866		$	(147,670	)	$	(5,068	)	$	42,158
Issuance of common stock, net of cost		2,645,000			3		138,836			—			—			138,839
Stock-based compensation		—			—		7,849			—			—			7,849
Vesting of restricted stock units		16,849			—		—			—			—			—
Restricted stock units withheld to    settle employee tax withholding liability		(5,301	)		—		(333	)		—			—			(333	)
Exercise of stock options		501,083			—		8,746			—			—			8,746
Issuance of shares under employee    stock purchase plan		24,266			—		1,283			—			—			1,283
Other comprehensive income		—			—		—			—			22			22
Net loss		—			—		—			(14,134	)		—			(14,134	)
Balance at March 31, 2019		32,882,089			33		351,247			(161,804	)		(5,046	)		184,430
Issuance of common stock, net of cost		—			—		(5	)		—			—			(5	)
Stock-based compensation		—			—		8,282			—			—			8,282
Vesting of restricted stock units		25,720			—		—			—			—			—
Restricted stock units withheld to    settle employee tax withholding liability		(1,410	)		—		(116	)		—			—			(116	)
Exercise of stock options		243,920			—		4,741			—			—			4,741
Other comprehensive income		—			—		—			—			271			271
Net loss		—			—		—			(12,063	)		—			(12,063	)
Balance at June 30, 2019		33,150,319			33		364,149			(173,867	)		(4,775	)		185,540
Issuance of common stock in    connection with acquisition of NC4		320,998			—		32,838			—			—			32,838
Stock-based compensation		—			—		8,383			—			—			8,383
Vesting of restricted stock units		229,284			—		—			—			—			—
Restricted stock units withheld to    settle employee tax withholding liability		(46,664	)		—		(4,082	)		—			—			(4,082	)
Exercise of stock options		106,464			1		2,334			—			—			2,335
Issuance of shares under employee    stock purchase plan		18,215			—		1,054			—			—			1,054
Other comprehensive loss		—			—		—			—			(2,049	)		(2,049	)
Net loss		—			—		—			(12,921	)		—			(12,921	)
Balance at September 30, 2019		33,778,616		$	34	$	404,676		$	(186,788	)	$	(6,824	)	$	211,098

6

	Common stock					Additional paid-in			Accumulated			Accumulated- other comprehensive
	Shares			Par value		capital			deficit			income (loss)			Total
Balance at December 31, 2017		28,330,460		$	28	$	164,995		$	(109,252	)	$	220		$	55,991
Cumulative effect of adoption of    ASU 2014-09, net of taxes		—			—		—			9,097			—			9,097
Stock-based compensation		—			—		6,694			—			—			6,694
Vesting of restricted stock units		222,624			—		—			—			—			—
Restricted stock units withheld to    settle employee tax withholding liability		(27,771	)		—		(1,022	)		—			—			(1,022	)
Exercise of stock options		153,744			1		1,465			—			—			1,466
Issuance of shares under employee    stock purchase plan		44,193			—		881			—			—			881
Other comprehensive loss		—			—		—			—			(267	)		(267	)
Net loss		—			—		—			(12,342	)		—			(12,342	)
Balance at March 31, 2018		28,723,250			29		173,013			(112,497	)		(47	)		60,498
Stock-based compensation		—			—		10,022			—			—			10,022
Vesting of restricted stock units		221,624			—		—			—			—			—
Restricted stock units withheld to    settle employee tax withholding liability		(53,326	)		—		(2,750	)		—			—			(2,750	)
Exercise of stock options		367,819			—		4,369			—			—			4,369
Other comprehensive loss		—			—		—			—			(2,384	)		(2,384	)
Net loss		—			—		—			(16,918	)		—			(16,918	)
Balance at June 30, 2018		29,259,367			29		184,654			(129,415	)		(2,431	)		52,837
Stock-based compensation		—			—		3,541			—			—			3,541
Vesting of restricted stock units		226,883			—		—			—			—			—
Restricted stock units withheld to    settle employee tax withholding liability		(73,372	)		—		(4,149	)		—			—			(4,149	)
Exercise of stock options		182,263			—		2,986			—			—			2,986
Issuance of shares under employee    stock purchase plan		30,324			—		877			—			—			877
Other comprehensive income		—			—		—			—			81			81
Net loss		—			—		—			(8,450	)		—			(8,450	)
Balance at September 30, 2018		29,625,465		$	29	$	187,909		$	(137,865	)	$	(2,350	)	$	47,723

See accompanying notes to condensed consolidated financial statements.

7

EVERBRIDGE, INC. AND SUBSIDIARIES

Condensed Consolidated Statements of Cash Flows

(in thousands)

(unaudited)

	Nine Months Ended September 30,
	2019			2018
Cash flows from operating activities:
Net loss	$	(39,118	)	$	(37,710	)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization		13,192			10,172
Amortization of deferred costs		5,486			3,928
Accretion of interest on convertible senior notes		3,667			3,435
Provision for doubtful accounts and sales reserve		642			158
Stock-based compensation		24,094			20,007
Other non-cash adjustments		(47	)		(345	)
Changes in operating assets and liabilities:
Accounts receivable		(8,405	)		1,524
Prepaid expenses		(5,144	)		(2,439	)
Deferred costs		(8,438	)		(6,991	)
Other assets		924			(1,584	)
Accounts payable		7,318			(113	)
Accrued payroll and employee related liabilities		1,974			2,109
Accrued expenses		(296	)		(621	)
Deferred revenue		12,373			7,237
Other liabilities		632			457
Net cash provided by (used in) operating activities		8,854			(776	)
Cash flows from investing activities:
Capital expenditures		(4,417	)		(855	)
Proceeds from landlord reimbursement		1,143			—
Payments for acquisition of business, net of acquired cash		(58,419	)		(35,857	)
Purchase of short-term investments		(1,975	)		(57,709	)
Maturities of short-term investments		47,765			74,069
Additions to intangibles		—			(184	)
Additions to capitalized software development costs		(5,867	)		(6,722	)
Net cash used in investing activities		(21,770	)		(27,258	)
Cash flows from financing activities:
Restricted stock units withheld to settle employee tax withholding liability		(4,531	)		(7,921	)
Proceeds from public offering, net of costs		139,110			—
Proceeds from employee stock purchase plan		2,337			1,758
Proceeds from stock option exercises		15,822			8,821
Other		(548	)		(635	)
Net cash provided by financing activities		152,190			2,023
Effect of exchange rates on cash, cash equivalents and restricted cash		(227	)		(746	)
Net increase (decrease) in cash, cash equivalents and restricted cash		139,047			(26,757	)
Cash, cash equivalents and restricted cash—beginning of period		60,068			103,051
Cash, cash equivalents and restricted cash—end of period	$	199,115		$	76,294
Supplemental disclosures of cash flow information:
Cash paid during the year for:
Interest	$	863		$	771
Taxes, net of refunds received		—			43
Supplemental disclosure of non-cash activities:
Capitalized assets included in accounts payable and accrued expenses		122			278
Capitalized development costs included in accounts payable and accrued expenses		7			—
Common stock issued in connection with acquisition		32,838			—
Contingent consideration in connection with acquisition		550			—
Note payable issued for asset acquisition		—			52
Stock-based compensation capitalized for software development		420			250

See accompanying notes to condensed consolidated financial statements.

8

EVERBRIDGE, INC. AND SUBSIDIARIES

Notes to the Condensed Consolidated Financial Statements

(Unaudited)

(1) Business and Nature of Operations

Everbridge, Inc., a Delaware corporation (together with its wholly-owned subsidiaries, referred to as “Everbridge” or the “Company”), is a global software company that provides enterprise software applications that automate and accelerate organizations’ operational response to critical events in order to keep people safe and businesses running. The Company’s SaaS-based platform enables the Company’s customers to quickly and reliably deliver messaging to a large group of people during critical situations. The Company’s enterprise applications, such as Mass Notification, Incident Management, Safety Connection, IT Alerting, Visual Command Center, Public Warning, Crisis Management, Community Engagement and Secure Messaging, automate numerous critical event management processes. The Company generates revenue primarily from subscription fees to the Company’s enterprise applications. The Company has operations in the United States, Norway, India, the Netherlands, Sweden, England, Germany and China.

(2) Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018.

The condensed consolidated balance sheet as of December 31, 2018, included herein, was derived from the audited financial statements as of that date, but does not include all disclosures including certain notes required by GAAP on an annual reporting basis. In order to conform to the current year’s presentation, current Deferred costs of $6.5 million and noncurrent Deferred costs of $10.3 million as of December 31, 2018 are reported in Deferred costs and other current assets and Deferred costs and other assets, respectively, with no effect on Total current assets or Total assets, respectively.

In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss, statements of stockholders’ equity and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full year 2019 or any future period.

Effective January 1, 2019, the Company adopted the requirements of Accounting Standards Update (“ASU”) No. 2016-02, Leases, as discussed in this Note 2 and Note 16.

Principles of Consolidation

The condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated.

Use of Estimates

The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements, and the reported amount of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Assets and liabilities which are subject to judgment and use of estimates include the determination of the period of benefit for deferred commissions, allowances for doubtful accounts, the fair value of assets acquired and liabilities assumed in business combinations, the recoverability of goodwill and long-lived assets, valuation allowances with respect to deferred tax assets, useful lives associated with property and equipment and intangible assets, contingencies, and the valuation and assumptions underlying stock-based compensation. On an ongoing basis, the Company evaluates its estimates compared to historical experience and trends, which form the basis for making judgments about the carrying value of assets and liabilities. In addition, the Company engages valuation specialists to assist with management’s determination of the valuation of its fair values of assets acquired and liabilities assumed in business combinations and certain market-based performance equity awards.

9

Concentrations of Credit and Business Risk

Financial instruments that potentially subject the Company to a concentration of credit risk consist of cash and cash equivalents and accounts receivable.

The Company maintains cash balances at several banks. Accounts located in the United States are insured by the Federal Deposit Insurance Corporation (“FDIC”) up to $250,000. From time to time, balances may exceed amounts insured by the FDIC. The Company has not experienced any losses in such amounts.

The Company’s accounts receivable are generally unsecured and are derived from revenue earned from customers primarily located in the United States, Norway, Sweden and the United Kingdom and are generally denominated in U.S. dollars, Norwegian Krone, Swedish Kronor or British Pounds. Each reporting period, the Company reevaluates each customer’s ability to satisfy credit obligations and maintains an allowance for doubtful accounts based on the evaluations. No single customer comprised more than 10% of the Company’s total revenue for the three and nine months ended September 30, 2019 and 2018. No single customer comprised more than 10% of the Company’s total accounts receivable as of September 30, 2019 and 2018.   

Cash and Cash Equivalents

The Company considers all highly liquid instruments with original maturities of three months or less at the date of purchase to be cash equivalents. Cash and cash equivalents are recorded at cost, which approximates fair value. As of September 30, 2019, $174.8 million of the Company’s cash equivalents were invested in money market funds.

Restricted Cash

The Company’s restricted cash balance primarily consist of cash held at a financial institution for collateral against performance on the Company’s customer contracts and certain other cash deposits for specific purposes.

Short-Term Investments

Short-term investments consist of highly liquid investments, primarily commercial paper, U.S. Treasury and U.S. agency securities, with maturities over three months from the date of purchase and less than 12 months from the date of the balance sheet. Debt securities, money market funds and U.S. agency bonds that the Company has the ability and positive intent to hold to maturity are carried at amortized cost, which approximates fair value. There were no short-term investments at September 30, 2019. Short-term investments of $45.5 million at December 31, 2018 were classified as held-to-maturity and primarily comprised of U.S. treasury and U.S. government and agency securities. All held-to-maturity securities have maturity dates within one year.

Significant Accounting Policies

Except for the accounting policies for leases that were updated, as set forth below, as a result of adopting ASU No. 2016-02, there have been no changes to the Company’s significant accounting policies described in the Annual Report on Form 10-K for the year ended December 31, 2018 filed with the SEC on March 1, 2019, that have had a material impact on the Company’s condensed consolidated financial statements and related notes.

Revenue Recognition

The Company derives its revenues primarily from subscription services and professional services. Revenues are recognized when control of these services is transferred to the Company’s customers in an amount that reflects the consideration it expects to be entitled to in exchange for those services.

The Company determines revenue recognition through the following steps:

• Identification of the contract, or contracts, with a customer

• Identification of the performance obligations in the contract

• Determination of the transaction price

• Allocation of the transaction price to the performance obligations in the contract

• Recognition of revenue when, or as, the Company satisfies a performance obligation

Subscription Services Revenues

Subscription services revenues primarily consist of fees that provide customers access to one or more of the Company’s hosted applications for critical event management, with routine customer support. Revenue is generally recognized over time on a ratable

10

basis over the contract term beginning on the date that the Company’s service is made available to the customer. All services are recognized using an output measure of progress looking at time elapsed as the contract generally provides the customer equal benefit throughout the contract period. The Company’s subscription contracts are generally two years or longer in length, billed annually in advance, and non-cancelable.

Professional Services Revenues

Professional services revenues primarily consist of fees for deployment and optimization services, as well as training. The majority of the Company’s consulting contracts revenue is recognized over time as the services are performed. For contracts billed on a fixed price basis, revenue is recognized over time based on the proportion performed.

Software License Revenues

On occasion we may sell software and related post contract support for on premise usage which is outside of our core business. These sales have been to a limited number of customers and is not a significant revenue stream for the Company.

Contracts with Multiple Performance Obligations

Some of the Company’s contracts with customers contain multiple performance obligations. For these contracts, the Company accounts for individual performance obligations separately if they are distinct. The transaction price is allocated to the separate performance obligations on a relative standalone selling price basis for those performance obligations with stable observable prices and then the residual method applied for any performance obligation that has pricing, which is highly variable. The Company determines the standalone selling prices based on the Company’s overall pricing objectives, taking into consideration market conditions and other factors, including the value of the Company’s contracts, the applications sold, customer demographics, geographic locations, and the number and types of users within the Company’s contracts.

Returns

The Company does not offer rights of return for its products and services in the normal course of business. 

Customer Acceptance

The Company’s contracts with customers generally do not include customer acceptance clauses.

Trade and Other Receivables

Trade and other receivables are primarily comprised of trade receivables that are recorded at the invoice amount, net of an allowance for doubtful accounts, which is not material. Other receivables represent unbilled receivables related to subscription and professional services contracts.

Deferred Costs

Sales commissions earned by the Company’s sales force are considered incremental and recoverable costs of obtaining a contract with a customer. These costs are deferred and then amortized on a straight-line basis over a period of benefit that the Company has determined to be four years. The Company has determined the period of benefit by taking into consideration its customer contracts, its technology and other factors. Sales commissions attributed to renewals are not material and are not commensurate with initial and growth sales. Amortization of deferred commissions is included in sales and marketing expenses in the accompanying condensed consolidated statements of operations.

Deferred Revenue

Deferred revenue consists of amounts that have been invoiced and for which the Company has the right to bill, but that have not been recognized as revenue because the related goods or services have not been transferred. Deferred revenue that will be realized during the succeeding 12-month period is recorded as current, and the remaining deferred revenue is recorded as non-current.

In instances where the timing of revenue recognition differs from the timing of invoicing, the Company has determined its contracts generally do not include a significant financing component. The primary purpose of the Company’s invoicing terms is to provide customers with simplified and predictable ways of purchasing the Company’s products and services, not to receive financing from its customers or to provide customers with financing. Examples include invoicing at the beginning of a subscription term with revenue recognized ratably over the contract period.

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Recently Adopted Accounting Pronouncements

ASU No. 2016-02

In February 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-02, Leases (Topic 842), to require lessees to recognize most leases on the balance sheet, while recognition on the statement of operations will remain similar to current lease accounting. The ASU requires lessees to recognize a liability for lease obligations, which represents the discounted obligation to make future lease payments, and a corresponding right-of-use (“ROU”) asset on the balance sheet. The guidance requires disclosure of key information about leasing arrangements that is intended to give financial statement users the ability to assess the amount, timing and potential uncertainty of cash flows related to leases. The ASU also eliminates real estate-specific provisions and modifies certain aspects of lessor accounting.

The Company adopted the standard on January 1, 2019 using the modified retrospective approach. The Company elected to apply the transition method that allows companies to continue applying the guidance under the lease standard in effect at that time in the comparative periods presented in the consolidated financial statements and recognize a cumulative-effect adjustment to the opening balance of retained earnings on the date of adoption. The Company also elected the “package of practical expedients”, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs.

Results for reporting periods beginning after January 1, 2019 are presented under the new standard, while prior period amounts are not adjusted and continue to be reported under the accounting standards in effect for the prior period. Upon adoption of the new lease standard, on January 1, 2019, the Company capitalized ROU assets of $14.7 million and $16.9 million of lease liabilities, within the Company’s condensed consolidated balance sheets upon adoption. Additionally, the Company reversed its deferred rent liability of $2.2 million, which upon adoption became a component of the right-of-use asset. The adoption of this standard did not have an impact on the Company’s condensed consolidated statement of operations or cash flows and did not result in a cumulative catch-up adjustment to the opening balance of retained earnings.

ASU No. 2018-02

In February 2018, the FASB issued ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The amendments in this update allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the U.S. Tax Cuts and Jobs Act of 2017. The new standard is effective for the Company beginning on January 1, 2019, with early adoption permitted. The Company adopted ASU 2018-02 effective January 1, 2019. The adoption of this standard did not have an impact on the Company’s condensed consolidated financial statements.

ASU No. 2018-07

In June 2018, the FASB issued ASU 2018-07, Improvements to Nonemployee Share Based Payments. The improvement expands stock-based compensation guidance to include share-based payment transactions for acquiring goods and services from nonemployees. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2018. The new standard is effective for the Company beginning on January 1, 2019, with early adoption permitted. The Company adopted ASU 2018-07 effective January 1, 2019. The adoption of this standard did not have an impact on our condensed consolidated financial statements.

Recently Issued Accounting Guidance Not Yet Adopted

ASU 2016-13

In June 2016, the FASB issued ASU 2016-13 (as amended through May 2019), Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 introduces a new forward-looking approach, based on expected losses, to estimate credit losses on certain types of financial instruments, including trade receivables and held-to-maturity debt securities, which will require entities to incorporate considerations of historical information, current information and reasonable and supportable forecasts. This ASU also expands disclosure requirements. ASU 2016-13 is effective for the Company beginning in the first quarter of 2020 and early adoption is permitted. The guidance will be applied using the modified-retrospective approach. The Company is currently assessing the impact this standard will have on the Company’s consolidated financial statements.

ASU 2018-13

In August 2018, the FASB issued ASU 2018-13, Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurements, which eliminates, adds and modifies certain disclosure requirements for fair value measurements as part of the FASB’s disclosure framework project. Adoption of this guidance is required for fiscal years and interim periods within those fiscal years, beginning after December 15, 2019. The Company is currently assessing the impact this standard will have on the Company’s consolidated financial statements.

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ASU 2018-15

In August 2018, the FASB issued ASU 2018-15, Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, a new standard on a customer's accounting for implementation, set-up, and other upfront costs incurred in a cloud computing arrangement (“CCA”). Under the new guidance, customers will assess if a CCA includes a software license and if a CCA does include a software license, implementation and set-up costs will be accounted for consistent with existing internal-use software implementation guidance. Implementation costs associated with a CCA that do not include a software license would be expensed to operating expenses. The standard also provides classification guidance on these implementation costs as well as additional quantitative and qualitative disclosures. The standard is effective for public business entities for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption is permitted, including adoption in any interim period. Entities can choose to adopt the new guidance prospectively or retrospectively. The Company is currently assessing the impact this standard will have on the Company’s consolidated financial statements.

Other accounting standard updates effective for interim and annual periods beginning after December 31, 2018 are not expected to have a material impact on the Company’s financial position, results of operations or cash flows.

(3) Accounts Receivable, Net

Accounts receivable, net is as follows (in thousands):

	As of			As of
	September 30, 2019			December 31, 2018
Accounts receivable	$	52,980		$	41,818
Allowance for doubtful accounts		(1,156	)		(711	)
Net accounts receivable	$	51,824		$	41,107

Bad debt expense was $0.3 million and $0.1 million for the three months ended September 30, 2019 and 2018, respectively. Bad debt expense was $0.6 million and $0.1 million for the nine months ended September 30, 2019 and 2018, respectively.

The following table summarizes the changes in the allowance for doubtful accounts (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Balance, beginning of period	$	(1,051	)	$	(716	)	$	(711	)	$	(863	)
Additions		(253	)		(134	)		(642	)		(25	)
Write-offs		148			30			197			68
Balance, end of period	$	(1,156	)	$	(820	)	$	(1,156	)	$	(820	)

The following table summarizes the changes in the sales reserve (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Balance, beginning of period	$	(195	)	$	(209	)	$	(200	)	$	(100	)
Additions		—			—			—			(133	)
Write-offs		4			69			9			93
Balance, end of period	$	(191	)	$	(140	)	$	(191	)	$	(140	)

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(4) Property and Equipment, Net

Property and equipment consisted of the following (in thousands):

	Useful life in years		As of September 30, 2019			As of December 31, 2018
Furniture and equipment		5	$	1,734		$	1,189
Leasehold improvements (1)		5		4,025			2,776
System hardware		5		1,471			1,404
Office computers		3		4,667			3,745
Computer and system software		3		1,471			1,385
				13,368			10,499
Less accumulated depreciation and amortization				(7,339	)		(5,849	)
Property and equipment, net			$	6,029		$	4,650

⁽¹⁾ Lesser of the lease term or the estimated useful lives of the improvements, which may be up to 5 years.

Depreciation and amortization expense for property and equipment was $0.6 million and $0.5 million for the three months ended September 30, 2019 and 2018, respectively. Depreciation and amortization expense for property and equipment was $1.7 million and $1.4 million for the nine months ended September 30, 2019 and 2018, respectively.  

(5) Capitalized Software Development Costs, Net

Capitalized software development costs consisted of the following (in thousands):

				As of September 30, 2019
	Gross carrying amount		Amortization period	Accumulated amortization			Net carrying amount
Capitalized software development costs	$	47,820	3 years	$	(33,728	)	$	14,092
Total capitalized software development costs	$	47,820		$	(33,728	)	$	14,092

				As of December 31, 2018
	Gross carrying amount		Amortization period	Accumulated amortization			Net carrying amount
Capitalized software development costs	$	45,677	3 years	$	(32,784	)	$	12,893
Total capitalized software development costs	$	45,677		$	(32,784	)	$	12,893

The Company capitalized software development costs of $6.3 million and $7.0 million for the nine months ended September 30, 2019 and 2018, respectively.   

Amortization expense for capitalized software development costs was $1.8 million and $1.5 million for the three months ended September 30, 2019 and 2018, respectively. Amortization expense for capitalized software development was $5.1 million and $4.3 million for the nine months ended September 30, 2019 and 2018, respectively. Amortization of capitalized software development costs is classified within cost of revenue in the consolidated statements of operations.

The expected amortization of capitalized software development costs, as of September 30, 2019, for each of the following years is as follows (in thousands):

2019 (for the remaining three months)	$	2,144
2020		6,459
2021		3,963
2022		1,526
	$	14,092

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(6) Fair Value Measurements

The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities approximate fair value because of the short maturity of these items.

Certain assets, including long-lived assets, goodwill and intangible assets are also subject to measurement at fair value on a non-recurring basis if they are deemed to be impaired as a result of an impairment review. For the nine months ended September 30, 2019 and year ended December 31, 2018, no impairments were identified.

The following table summarizes the Company's financial assets and liabilities measured at fair value on a recurring basis at September 30, 2019 and December 31, 2018 by level within the fair value hierarchy. Financial assets and financial liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement (in thousands):

	As of September 30, 2019
	Quoted		Significant
	Prices in		Other		Significant
	Active		Observable		Unobservable
	Markets		Inputs		Inputs		Total Fair
	(Level 1)		(Level 2)		(Level 3)		Value
Assets:
Cash equivalents:
Money market funds	$	174,819	$	—	$	—	$	174,819
Total financial assets	$	174,819	$	—	$	—	$	174,819
Liabilities:
Contingent consideration	$	—	$	—	$	550	$	550
Total financial liabilities	$	—	$	—	$	550	$	550
	As of December 31, 2018
	Quoted		Significant
	Prices in		Other		Significant
	Active		Observable		Unobservable
	Markets		Inputs		Inputs		Total Fair
	(Level 1)		(Level 2)		(Level 3)		Value
Assets:
Cash equivalents:
Money market funds	$	47,258	$	—	$	—	$	47,258
U.S. government and agency securities		—		2,272		—		2,272
Short-term investments:
U.S. treasury securities		—		38,809		—		38,809
U.S. government and agency securities		—		6,732		—		6,732
Total financial assets	$	47,258	$	47,813	$	—	$	95,071

The Company classifies and discloses fair value measurements in one of the following three categories of fair value hierarchy:

Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets and liabilities.

Level 2 - Quoted prices in markets that are not active or financial instruments for which all significant inputs are observable, either directly or indirectly.

Level 3 - Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable.

A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.

The Company’s assets that are measured by management at fair value on a recurring basis are generally classified within Level 1 or Level 2 of the fair value hierarchy. The Company did not have any transfers into and out of Level 1 or Level 2 during the nine months ended September 30, 2019.  

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The Company considers all highly liquid investments purchased with a remaining maturity of three months or less to be cash equivalents. The fair value of the Company’s investments in certain money market funds is their face value and such instruments are classified as Level 1 and are included in cash and cash equivalents on the consolidated balance sheets. At December 31, 2018, the Company’s Level 2 securities were priced by pricing vendors. These pricing vendors utilize the most recent observable market information in pricing these securities or, if specific prices are not available for these securities, use other observable inputs like market transactions involving identical or comparable securities. There were no Level 2 securities at September 30, 2019.

The following table summarizes the changes in Level 3 financial instruments (in thousands):

Fair Value at December 31, 2018	$	—
Additions from acquisition		550
Balance at September 30, 2019	$	550

The Company estimates the fair value of the convertible senior notes based on their last actively traded prices (Level 1) or market-observable inputs (Level 2). As of September 30, 2019 and December 31, 2018, the fair value of the convertible senior notes was determined to be $217.9 million and $189.8 million, respectively, and the carrying value of the notes was $97.8 million and $94.1 million, respectively.

(7) Goodwill and Intangible Assets, Net

Goodwill was $90.7 million and $48.4 million as of September 30, 2019 and December 31, 2018, respectively. There were no impairments recorded against goodwill during the nine months ended September 30, 2019 and for the year ended December 31, 2018. The following table displays the changes in the gross carrying amount of goodwill (in thousands):

Balance at December 31, 2018	$	48,382
Foreign currency translation		(1,018	)
Increase due to acquisitions		43,342
Balance at September 30, 2019	$	90,706

Intangible assets consisted of the following (in thousands):

				As of September 30, 2019
	Gross carrying amount		Weighted average life (years)	Accumulated amortization			Net carrying amount
Amortizable intangible assets:
Developed technology	$	9,436	3.00	$	(3,412	)	$	6,024
Tradenames		11,452	3.48		(1,940	)		9,512
Non-compete		240	2.00		(240	)		—
Customer relationships		63,119	6.84		(8,031	)		55,088
Total intangible assets	$	84,247		$	(13,623	)	$	70,624

				As of December 31, 2018
	Gross carrying amount		Weighted average life (years)	Accumulated amortization			Net carrying amount
Amortizable intangible assets:
Developed technology	$	5,090	3.04	$	(3,225	)	$	1,865
Tradenames		3,193	4.51		(1,526	)		1,667
Non-compete		240	2.00		(230	)		10
Customer relationships		26,990	6.39		(7,335	)		19,655
Total intangible assets	$	35,513		$	(12,316	)	$	23,197

Amortization expense for intangible assets was $3.1 million and $1.9 million for the three months ended September 30, 2019 and 2018, respectively. Amortization expense for intangible assets was $6.4 million and $4.5 million for the nine months ended September 30, 2019 and 2018, respectively.    

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The expected amortization of the intangible assets, as of September 30, 2019, for each of the next five years and thereafter is as follows (in thousands):

2019 (for the remaining three months)	$	4,015
2020		14,786
2021		14,410
2022		11,200
2023		8,367
Thereafter		17,846
	$	70,624

(8) Acquisitions

The Company continually evaluates potential acquisitions that either strategically fit within the Company’s existing portfolio or expand the Company’s portfolio into new product lines or adjacent markets. The Company has completed a number of acquisitions that have been accounted for as business combinations and have resulted in the recognition of goodwill in the Company’s financial statements. This goodwill includes the know-how of the assembled workforce, the ability of the workforce to further improve technology and product offerings, customer relationships and the expected cash flows resulting from these efforts. Goodwill may also include expected synergies resulting from the complementary strategic fit these businesses bring to existing operations. The business acquisition discussed below is included in the Company’s results of operations from their respective dates of acquisition.

2019 Acquisitions

Mission Mode Solutions, Inc.

On April 1, 2019, the Company entered into a Stock Purchase Agreement with Mission Mode Solutions, Inc. (“Mission Mode”) pursuant to which the Company purchased all of the issued and outstanding shares of stock of Mission Mode for base consideration of $6.8 million. There is also a contingent payment of up to $1.0 million that can be earned in addition to the base consideration by the sellers based on successfully converting Mission Mode’s customers to the Company’s products. At the date of the acquisition, the Company preliminarily assessed the probabilities of Mission Mode meeting the future sales and billing thresholds and determined them to be probable. Therefore, contingent consideration was recorded as part of the purchase price allocation and the preliminary fair value of the contingent consideration was determined to be $0.6 million. The Company’s acquisition of Mission Mode was made primarily to expand the Company’s customer base and to a lesser extent to complement some of the existing facets of Mission Mode’s business with the Company’s existing products.   

The Company accounted for the acquisition of Mission Mode using the acquisition method of accounting for business combinations under FASB Accounting Standards Codification (“ASC”) 805, Business Combinations. The total purchase price is allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date.

Fair value estimates are based on a complex series of judgments about future events and uncertainties and rely heavily on estimates and assumptions. The judgments used to determine the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives and the expected future cash flows and related discount rates, can materially impact the Company’s results of operations. Significant inputs used for the model included the amount of cash flows, the expected period of the cash flows and the discount rates. 

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The following table summarizes the allocation of the purchase consideration and the estimated fair value of the assets acquired and the liabilities assumed as well as the aggregate consideration during the three months ended June 30, 2019 for the acquisition of Mission Mode made by the Company (in thousands):

	Mission Mode
Assets acquired
Accounts receivable	$	295
Other assets		7
Property and equipment		6
Trade names		220
Acquired technology		310
Customer relationships		4,600
Goodwill		2,918
Total assets acquired		8,356
Liabilities assumed
Accounts payable and accrued expenses		152
Deferred revenue		880
Other liabilities		10
Net assets acquired	$	7,314
Consideration paid
Cash paid, net of cash acquired	$	6,764
Contingent consideration		550
Total	$	7,314

The weighted average useful life of all identified acquired intangible assets is 6.90 years. The weighted average useful lives for acquired technologies, customer relationships and trade names are 3.0 years, 7.0 years and 1.0 year, respectively. Identifiable intangible assets with definite lives are amortized over the period of estimated benefit using the straight-line method and the estimated useful lives of one to seven years. The straight-line method of amortization represents the Company’s best estimate of the distribution of the economic value of the identifiable intangible assets.

As a result of the acquisition, the Company recorded $2.9 million of goodwill. The goodwill balance is primarily attributed to the anticipated synergies from the acquisition and expanded market opportunities with respect to the integration of Mission Mode’s products with the Company's other solutions. The Company believes that the factors listed above in relation to the purchase of Mission Mode support the amount of goodwill recorded as a result of the purchase price paid for the acquisition, in relation to other acquired tangible and intangible assets. The resulting goodwill from the Mission Mode acquisition is not deductible for income tax purposes.

For the nine months ended September 30, 2019, the Company incurred transaction costs of $0.1 million in connection with the Mission Mode acquisition, which were expensed as incurred and included in general and administrative expenses within the accompanying consolidated statements of operations.

Neither the investment in the assets nor the results of operations of the acquisition of Mission Mode was significant to the Company’s consolidated financial position or results of operations, and thus pro forma information is not presented.

NC4 Inc. and NC4 Public Sector

On July 29, 2019, the Company entered into a Membership Interest Purchase Agreement (the “Purchase Agreement”) with NC4 Inc., NC4 Public Sector LLC, and Celerium Group Inc., pursuant to which the Company purchased all of the outstanding membership interests of NC4 Inc. and NC4 Public Sector LLC (collectively, “NC4”) for total consideration of approximately $84.5  million. The Company paid approximately $51.7  million in cash at closing from the Company’s cash and cash equivalents, which is subject to certain post-closing net working capital adjustments provided for in the Purchase Agreement. The remaining purchase price was paid with 320,998  newly issued shares of the Company’s common stock. On the date of this acquisition the price of the Company’s common stock on the Nasdaq Global Market was $102.18  price per share. On August 1, 2019, the Acquisition was consummated pursuant to the Purchase Agreement, except the transfer of the NC4 Public Sector business which was consummated on September 30, 2019.  The Company determined that the two transactions should be accounted for as a single transaction in accordance with ASC 810-10-40-6, Consolidation, as the transactions were entered in contemplation of one another and were essentially a single transaction designed to achieve an overall commercial effect. The Company’s acquisition of NC4 was made primarily to expand the Company’s customer base and to a lesser extent to complement some of the existing facets of NC4’s business with the Company’s existing products.

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The Company accounted for the acquisition of NC4 using the acquisition method of accounting for business combinations under ASC 805. Acquired assets and liabilities were recorded at their estimated fair values as of the acquisition date.

As the Company finalizes their estimation of the fair value of the assets acquired and liabilities assumed, additional adjustments may be recorded during the measurement period (a period not to exceed 12 months). Fair value estimates are based on a complex series of judgments about future events and uncertainties and rely heavily on estimates and assumptions. The judgments used to determine the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives and the expected future cash flows and related discount rates, can materially impact the Company’s results of operations. Significant inputs used for the model included the amount of cash flows, the expected period of the cash flows and the discount rates. The finalization of the acquisition accounting valuation assessment may result in a change in the valuation of accounts receivable, deferred tax assets and liabilities, deferred revenue, and intangible assets, which could have a material impact on the Company’s results of operations and financial position. The initial accounting is incomplete as of September 30, 2019 for the acquired assets and liabilities noted above as the Company is currently in process of completing the assessment of valuation inputs and assumptions as well as completing the assessment of the tax attributes of the business combination.  

The following table summarizes the preliminary estimated fair value of the assets acquired and the liabilities assumed as well as the aggregate consideration during the three months ended September 30, 2019 for the acquisition of NC4 made by the Company (in thousands):

	NC4
Assets acquired
Accounts receivable	$	2,611
Other current assets		530
Property and equipment		75
Acquired technology		5,210
Trade names		8,610
Customer relationships		35,490
Goodwill		40,424
Total assets acquired		92,950
Liabilities assumed
Deferred revenue		7,540
Other current liabilities		917
Net assets acquired	$	84,493
Consideration paid
Cash paid	$	51,655
Fair value of common stock issued		32,838
Total	$	84,493

The weighted average useful life of all identified acquired intangible assets is 5.88 years. The average useful lives for acquired technologies, customer relationships and trade names are 3.0 years, 7.0 years and 3.0 years, respectively. Identifiable intangible assets with definite lives are amortized over the period of estimated benefit using the straight-line method and the estimated useful lives of three to seven years. The straight-line method of amortization represents the Company’s best estimate of the period of expected cash flows of the identifiable intangible assets.                              

As a result of the acquisition, the Company recorded $40.4 million of goodwill. The goodwill balance is primarily attributed to the anticipated synergies from the acquisition and expanded market opportunities with respect to the integration of NC4’s products with the Company's other solutions. The Company believes that the factors listed above in relation to the purchase of NC4 support the amount of goodwill recorded as a result of the purchase price paid for the acquisition, in relation to other acquired tangible and intangible assets. The resulting goodwill from the NC4 acquisition is deductible for income tax purposes.

For both the three and nine months ended September 30, 2019, the Company incurred transaction costs of $0.2 million in connection with the NC4 acquisition, which were expensed as incurred and included in general and administrative expenses within the accompanying consolidated statements of operations.

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Unaudited Pro Forma Financial Information

The following tables reflect the results of acquired business included in our unaudited financial information for the three months ended September 30, 2019 as well as the unaudited pro forma combined results of operations for the three and nine months ended September 30, 2019 and the three and nine months ended September 30, 2018 as if the acquisition of NC4 had taken place on January 1, 2018. The unaudited pro forma financial information includes the effects of certain adjustments, including the amortization of acquired intangible assets and the associated tax effect and the elimination of the Company’s and the acquiree’s non-recurring acquisition related expenses (in thousands, except per share amounts):

	Revenue		Net loss
From the acquisition date to September 30, 2019	$	2,040	$	(1,465	)
For the three months ended September 30, 2019 pro forma		54,352		(13,387	)
For the nine months ended September 30, 2019 pro forma		154,719		(45,875	)
For the three months ended September 30, 2018 pro forma		43,037		(11,543	)
For the nine months ended September 30, 2018 pro forma		116,838		(48,652	)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Basic and diluted loss per share pro forma	$	(0.40	)	$	(0.39	)	$	(1.38	)	$	(1.66	)

The unaudited pro forma information presented does not purport to be indicative of the results that would have been achieved had the acquisition been consummated at January 1, 2018 nor of the results which may occur in the future. The pro forma adjustments are based upon available information and certain assumptions that the Company believes are reasonable.

2018 Acquisitions

For the year ended December 31, 2018, the Company acquired Unified Messaging Systems ASA, PlanetRisk, Inc. and Respond B.V. and accounted for the acquisitions using the acquisition method of accounting for business combinations under ASC 805. The acquisitions were not material individually or on a consolidated basis.

Unified Messaging Systems ASA

On April 3, 2018, the Company acquired Unified Messaging Systems ASA (“UMS”) in exchange for cash consideration of $31.9 million, net of cash acquired. UMS is an industry leader in the area of critical communication and population alerting systems and is headquartered in Oslo, Norway. The Company acquired UMS for its customer base and to complement some of the existing facets of UMS’ business with the Company’s existing products.

PlanetRisk, Inc.

On May 1, 2018, the Company acquired certain assets from PlanetRisk, Inc. (“PlanetRisk”) in exchange for cash consideration of $2.0 million. PlanetRisk is a provider of data analytics and visualization solutions. The Company acquired these assets from PlanetRisk for its customer base and to complement some of the existing facets of PlanetRisk’s business with the Company’s existing products.

Respond B.V.

On May 18, 2018, the Company acquired Respond B.V. (“Respond”) in exchange for current cash consideration of $2.0 million, net of cash acquired and issued a note to be paid one year after the transaction date in the amount of $0.4 million, for a total purchase price of $2.3 million. Respond is a provider of critical communication solutions and is headquartered in the Netherlands. The Company acquired Respond for its customer base and to complement some of the existing facets of Respond’s business with the Company’s existing products.

For the three and nine months ended September 30, 2018, the Company incurred transaction costs of $0.3 million and $0.6 million, respectively, in connection with the UMS, PlanetRisk and Respond acquisitions, which were expensed as incurred and included in general and administrative expenses within the accompanying consolidated statements of operations.

Neither the investment in the assets nor the results of operations of the acquisition of UMS, PlanetRisk and Respond was significant to the Company’s consolidated financial position or results of operations, and thus pro forma information is not presented.

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(9) Convertible Senior Notes

In November 2017, the Company issued $115.0 million aggregate principal amount of 1.50% convertible senior notes (the “Notes”) due November 1, 2022, unless earlier repurchased by the Company or converted by the holder pursuant to their terms. Interest is payable semiannually in arrears on May 1 and November 1 of each year, commencing on May 1, 2018.

The Notes are governed by an Indenture between the Company, as issuer, and U.S. Bank, National Association, as trustee. The Notes are unsecured and rank: senior in right of payment to the Company’s future indebtedness that is expressly subordinated in right of payment to the Notes; equal in right of payment to the Company’s existing and future indebtedness that is not so subordinated; effectively subordinated in right of payment to any of the Company’s secured indebtedness to the extent of the value of the assets securing such indebtedness; and structurally subordinated to all existing and future indebtedness and other liabilities incurred by the Company’s subsidiaries.

Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of the Company’s common stock or a combination of cash and shares of common stock, at the Company’s election. The Company’s current intention is to settle the conversion in shares of common stock if a conversion were to occur.

The Notes have an initial conversion rate of 29.6626 shares of common stock per $1,000 principal amount of Notes. This represents an initial effective conversion price of approximately $33.71 per share of common stock and approximately 3.4 million shares issuable upon conversion. Throughout the term of the Notes, the conversion rate may be adjusted upon the occurrence of certain events. Holders of the Notes will not receive any cash payment representing accrued and unpaid interest, if any, upon conversion of a Note, except in limited circumstances. Accrued but unpaid interest will be deemed to be paid by cash, shares of the Company’s common stock or a combination of cash and shares of the Company’s common stock paid or delivered, as the case may be, to the holder upon conversion of a Note.

Prior to the close of business on the business day immediately preceding May 1, 2022, the Notes will be convertible at the option of holders during certain periods, only upon satisfaction of certain conditions set forth below. On or after May 1, 2022, until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their Notes at the conversion rate at any time regardless of whether the conditions set forth below have been met.

Holders may convert all or a portion of their Notes prior to the close of business on the business day immediately preceding May 1, 2022, in multiples of $1,000 principal amount, only under the following circumstances:

• during any calendar quarter commencing after the calendar quarter ending on March 31, 2018 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day;

• during the five business day period after any five consecutive trading day period (the “Notes Measurement Period”) in which the “trading price” (as the term is defined in the Indenture) per $1,000 principal amount of notes for each trading day of such Notes Measurement Period was less than 98% of the product of the last reported sale price of the Company’s common stock on such trading day and the conversion rate on each such trading day;

• If the Company calls any or all of the notes for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the maturity date; or

• upon the occurrence of specified corporate events.

Based on the market price of the Company’s common stock during the 30 trading days preceding June 30, 2018, the Notes are convertible at the option of the debt holder as of September 30, 2018. No debt holders have exercised their right for conversion as of September 30, 2019. The Notes are classified as long-term on the consolidated balance sheet as of September 30, 2019 as it is the Company’s intent to settle all of the debt at maturity or to settle in shares if exercised by the debt holder prior to maturity.

Based on market data available for publicly traded, senior, unsecured corporate bonds issued by companies in the same industry and with similar maturity, the Company estimated the implied interest rate of its Notes to be approximately 6.93%, assuming no conversion option. Assumptions used in the estimate represent what market participants would use in pricing the equity component, including market interest rates, credit standing, and yield curves, all of which are defined as Level 2 observable inputs. The estimated implied interest rate was applied to the Notes, which resulted in a fair value of the liability component of $92.1 million upon issuance, calculated as the present value of implied future payments based on the $115.0 million aggregate principal amount. The excess of the principal amount of the liability component over its carrying amount, or the debt discount, is amortized to interest expense over the term of the Notes. The $22.9 million difference between the aggregate principal amount of $115.0 million and the estimated fair value of the liability component was recorded in additional paid-in capital as the Notes were not considered redeemable.

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The Notes consist of the following (in thousands):

	As of September 30, 2019			As of December 31, 2018
Liability component:
Principal	$	115,000		$	115,000
Less: debt discount, net of amortization		(17,236	)		(20,903	)
Net carrying amount	$	97,764		$	94,097
Equity component (1)		22,094			22,094

⁽¹⁾ Recorded in the consolidated balance sheet within additional paid-in capital, net of $0.8 million transaction costs in equity as of December 31, 2017.

The following table sets forth total interest expense recognized related to the Notes (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
1.50% coupon	$	429	$	432	$	1,294	$	1,301
Amortization of debt discount and transaction costs		1,243		1,160		3,667		3,435
	$	1,672	$	1,592	$	4,961	$	4,736

As of September 30, 2019 and December 31, 2018, the fair value of the Notes, which was determined based on inputs that are observable in the market or that could be derived from, or corroborated with, observable market data, quoted price of the Notes in an over-the-counter market (Level 2), and carrying value of debt instruments (carrying value excludes the equity component of the Company’s convertible notes classified in equity) were as follows (in thousands):

	As of September 30, 2019				As of December 31, 2018
	Fair Value		Carrying Value		Fair Value		Carrying Value
Convertible senior notes	$	217,947	$	97,764	$	189,802	$	94,097

In connection with the issuance of the Notes, the Company entered into capped call transactions with certain counterparties affiliated with the initial purchasers and others. The capped call transactions are expected to reduce potential dilution of earnings per share upon conversion of the Notes. Under the capped call transactions, the Company purchased capped call options that in the aggregate relate to the total number of shares of the Company’s common stock underlying the Notes, with an initial strike price of approximately $33.71 per share, which corresponds to the initial conversion price of the Notes and is subject to anti-dilution adjustments substantially similar to those applicable to the conversion rate of the Notes, and have a cap price of approximately $47.20. The cost of the purchased capped calls of $12.9 million was recorded to shareholders’ equity as of December 31, 2018 and will not be re-measured.

Based on the closing price of the Company’s common stock of $61.71 on September 30, 2019, the if-converted value of the Notes was more than their respective principal amounts.

(10) Stockholders’ Equity

Preferred Stock

As of September 30, 2019, the Company had authorized 10,000,000 shares of preferred stock, par value $0.001, of which no shares were outstanding.

Common Stock

As of September 30, 2019, the Company had authorized 100,000,000 shares of common stock, par value $0.001. Holders of common stock are entitled to one vote per share. At September 30, 2019 and December 31, 2018, there were 33,778,616 and 29,700,192 shares of common stock issued and outstanding, respectively.

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(11) Stock Plans and Stock-Based Compensation

The Company’s 2016 Equity Incentive Plan (the “2016 Plan”) became effective on September 15, 2016. The 2016 Plan provides for the grant of incentive stock options, non-qualified stock options, restricted stock awards, restricted stock unit awards, stock appreciation rights and performance share awards to employees, directors and consultants of the Company. A total of 3,893,118 shares of the Company’s common stock were initially reserved for issuance under the 2016 Plan, which is the sum of (1) 2,000,000 shares, (2) the number of shares reserved for issuance under the Company’s 2008 Equity Incentive Plan or the 2008 Plan, at the time the 2016 Plan became effective (up to a maximum of 42,934 shares) and (3) shares subject to stock options or other stock awards granted under the 2008 Plan that would have otherwise returned to the Company’s 2008 Plan (up to a maximum of 1,850,184 shares). The number of shares of common stock reserved for issuance under the 2016 Plan will automatically increase on January 1 of each year, beginning on January 1, 2017, by 3% of the number of shares of the Company’s capital stock outstanding on the immediately preceding December 31, or such lesser number of shares as determined by the Company’s board of directors.

As a result of the adoption of the 2016 Plan, no further grants may be made under the 2008 Plan. The 2008 Plan provided for the grant of stock options to the Company’s employees, directors and consultants. Stock option awards were granted with an exercise price equal to the fair market value of the Company’s common stock at the date of grant as determined by the Company’s board of directors. The option awards generally vested over four years and were exercisable any time after vesting. The stock options expire ten years after the date of grant.   

2016 Employee Stock Purchase Plan

The Company’s Employee Stock Purchase Plan (the “2016 ESPP”) became effective on September 15, 2016. A total of 500,000 shares of the Company’s common stock were initially reserved for issuance under the 2016 Plan. The number of shares reserved for issuance under the 2016 ESPP will automatically increase on January 1 of each year, beginning on January 1, 2017, by the lesser of 200,000 shares of the Company’s common stock, 1% of the number of shares of the Company’s common stock outstanding on the immediately preceding December 31, or such lesser number of shares as determined by the Company’s board of directors.

The 2016 ESPP allows eligible employees to purchase shares of the Company’s common stock at a discount of up to 15% through payroll deductions of their eligible compensation, subject to any plan limitations. The 2016 ESPP provides for separate six-month offering periods beginning each March and September of each fiscal year.

On each purchase date, eligible employees will purchase the Company’s stock at a price per share equal to 85% of the lesser of (i) the fair market value of the Company’s common stock on the offering date or (ii) the fair market value of the Company’s common stock on the purchase date.

For the nine months ended September 30, 2019 and 2018, 42,481 and 74,517 shares of common stock were purchased under the 2016 ESPP, respectively. The 2016 ESPP is considered compensatory for purposes of stock-based compensation expense. The Company recorded stock-based compensation expense of $0.2 million and $0.2 million for the three months ended September 30, 2019 and 2018, respectively. The Company recorded stock-based compensation expense of $0.7 million and $0.5 million for the nine months ended September 30, 2019 and 2018, respectively.  

Stock Options

The Company recorded stock-based compensation expense of $1.3 million and $0.7 million for the three months ended September 30, 2019 and 2018, respectively. The Company recorded stock-based compensation expense of $4.7 million and $4.7 million for the nine months ended September 30, 2019 and 2018, respectively.   

The total intrinsic value of options exercised for the nine months ended September 30, 2019 was $44.5 million. This intrinsic value represents the difference between the fair market value of the Company’s common stock on the date of exercise and the exercise price of each option. Based on the fair market value of the Company’s common stock at September 30, 2019, the total intrinsic value of all outstanding options was $28.2 million.

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The fair value of stock option grants and ESPP are determined using the Black-Scholes option pricing model with the following weighted average assumptions. In addition, the fair value per share on grant date is presented below: 

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Employee Stock Options:
Fair value per share on grant date		—	$58.75			—	$33.06 - $58.75
Expected term (in years) (1)		—		6.00		—		6.00
Expected volatility (2)		—	45%			—	45% - 50%
Risk-free interest rate (3)		—	2.72%			—	2.72% - 2.98%
Dividend rate (4)		—	0%			—	0%
Employee Stock Purchase Plan:
Expected term (in years) (1)		0.50		0.50		0.50		0.50
Expected volatility (2)	45%		45% - 50%		45%		45% - 60%
Risk-free interest rate (3)	1.93% - 2.52%		1.89% - 2.33%		1.93% - 2.52%		1.18% - 2.33%
Dividend rate (4)	0%		0%		0%		0%

⁽¹⁾ The expected term represents the period that the stock-based compensation awards are expected to be outstanding. Since the Company did not have sufficient historical information to develop reasonable expectations about future exercise behavior, the Company used the simplified method to compute expected term, which reflects the average of the time-to-vesting and the contractual life;

⁽²⁾ The expected volatility of the Company’s common stock on the date of grant is based on the weighted average of the Company’s historical volatility as a public company and the volatilities of publicly traded peer companies that are reasonably comparable to the Company’s own operations;

⁽³⁾ The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for zero coupon U.S. Treasury notes with maturities approximately equal to the expected term of the grant; and

⁽⁴⁾ The expected dividend yield is assumed to be zero as the Company has never paid dividends and has no current plans to pay any dividends on the Company’s common stock.

Total unrecognized compensation cost related to nonvested stock options was approximately $7.6 million as of September 30, 2019 and is expected to be recognized over a weighted average period of 2.1 years.

A summary of activities under the 2008 Plan and the 2016 Plan is shown as follows for the year ended December 31, 2018 and the nine months ended September 30, 2019:

	Stock options outstanding			Weighted average exercise price
Outstanding at December 31, 2017		2,440,290		$	16.55
Granted		557,896			35.01
Exercised		(778,370	)		13.04
Forfeited		(473,743	)		22.35
Outstanding at December 31, 2018		1,746,073			22.43
Granted		—			—
Exercised		(851,467	)		18.58
Forfeited		(96,758	)		23.95
Outstanding at September 30, 2019		797,848			26.36

Stock-based compensation expense is recognized over the award’s expected vesting schedule, which is reduced for forfeitures.

Stock options outstanding, and options exercisable and vested are as follows:

Outstanding as of September 30, 2019		Remaining contractual life (years)		Weighted average exercise price		Exercisable as of September 30, 2019		Remaining contractual life (years)		Weighted average exercise price
	797,848		7.65	$	26.36		222,219		6.53	$	18.21

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Outstanding as of December 31, 2018		Remaining contractual life (years)		Weighted average exercise price		Exercisable as of December 31, 2018		Remaining contractual life (years)		Weighted average exercise price
	1,746,073		7.89	$	22.43		579,319		6.73	$	8.13

Vested and nonvested stock option activity was as follows:

	Vested				Nonvested
	Options outstanding		Weighted average exercise price		Options outstanding		Weighted average exercise price
Outstanding at September 30, 2019		222,219	$	18.21		575,629	$	29.50
Outstanding at December 31, 2018		579,319	$	8.13		1,166,754	$	26.58

Restricted Stock Units

During the nine months ended September 30, 2019, the Company granted 359,474 restricted stock units (“RSUs”) to members of its senior management and certain other employees pursuant to the 2016 Plan. The Company accounts for RSUs issued to employees at fair value, based on the market price of the Company’s common stock on the date of grant. During the three months ended September 30, 2019 and 2018, the Company recorded $3.7 million and $2.3 million, respectively, of stock-based compensation related to the RSUs that had been issued to-date. During the nine months ended September 30, 2019 and 2018, the Company recorded $12.0 million and $4.4 million, respectively, of stock-based compensation related to the RSUs. There were 272,022 RSUs that vested during the nine months ended September 30, 2019. There were 138,155 RSUs that vested during the nine months ended September 30, 2018.

As of September 30, 2019, there was $36.3 million of unrecognized compensation expense related to unvested employee RSU awards which is expected to be recognized over a weighted-average period of approximately 2.55 years. For RSUs subject to graded vesting, the Company recognizes compensation cost on a straight-line basis over the service period for the entire award.

Performance-Based Restricted Stock Units

During the nine months ended September 30, 2019, the Company granted 328,343 performance-based restricted stock units (“PSUs”) to members of its management pursuant to the 2016 Plan. The PSUs generally vest based on the Company achieving certain revenue growth thresholds which range from 20% to 40% compounded annual growth over a measurement period of two years for the first 50% of PSUs and three years for the remaining PSUs. The vesting of the PSUs is subject to the employee’s continued employment with the Company through the date of achievement. The share price of the Company’s common stock on the date of issuance of the PSUs ranged from $54.83 to $98.92 per share. The fair value is based on value of the common stock at the date of issuance and the probability of achieving the performance metric. Compensation cost is adjusted in future periods for subsequent changes in the expected outcome of the performance related conditions. During the three months ended September 30, 2019 and 2018, the Company recognized $3.1 million and $0.2 million, respectively, of stock compensation expense in connection with the PSU awards. During the nine months ended September 30, 2019 and 2018, the Company recognized $6.7 million and $0.4 million, respectively, of stock compensation expense in connection with the PSU awards.  

As of September 30, 2019, there was $31.8 million of unrecognized compensation expense related to unvested PSUs which is expected to be recognized over a weighted-average period of approximately 2.14 years. Compensation cost is recognized under the accelerated method and is adjusted in future periods for subsequent changes in the expected outcome of the performance related conditions.

None of the PSUs had vested as of September 30, 2019.

Market-Based Restricted Stock Units

The Company granted no market-based restricted stock units (“market-based RSUs”) pursuant to the 2016 Plan during the nine months ended September 30, 2019. Market-based RSUs vested based on the Company achieving certain stock price thresholds, which range from $35 per share to $65 per share for 30 consecutive trading days as reported by The Nasdaq Stock Market, LLC, subject to the employee’s continued employment with the Company through the date of achievement. The share price of the Company’s common stock on the date of issuance of the market-based RSUs was $23.16 to $51.99 per share. The fair value was based on values calculated under the Monte Carlo simulation model on the grant date. The key estimates used in the Monte-Carlo simulation were a risk-free rate of 2.26% to 2.85%, dividend yield of zero, expected term of 10 years and volatility of 50% to 60%. Compensation cost is not adjusted in future periods for subsequent changes in the expected outcome of market related conditions. No stock-based compensation expense was recorded during the nine months ended September 30, 2019 as all issued market-based RSUs were fully vested previously. For the three and nine months ended September 30, 2018, the Company recognized $0.1 million and $10.3 million, respectively, of stock compensation expense in connection with these awards.  

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As of September 30, 2019, there was no unrecognized compensation expense related to unvested market-based awards.  The Company recognizes compensation cost on a straight-line basis over the service period for the entire award.

There were 657 and 543,825 market-based RSUs which had vested during the nine months ended September 30, 2019 and 2018, respectively.  

A summary of activity in connection with the Company’s RSUs, market-based RSUs and PSUs for the nine-month period ended September 30, 2019 is as follows:

	Number of Shares
Outstanding as of December 31, 2018		904,033
Granted		687,817
Vested		(271,853	)
Forfeited		(75,181	)
Outstanding as of September 30, 2019		1,244,816

Stock-Based Compensation Expense

The Company recorded the total stock-based compensation expense as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Cost of revenue	$	509	$	312	$	1,356	$	1,877
Sales and marketing		2,423		1,180		7,338		7,147
Research and development		1,732		1,091		5,560		5,606
General and administrative		3,637		958		9,840		5,627
Total	$	8,301	$	3,541	$	24,094	$	20,257

(12) Basic and Diluted Net Loss per Share

Basic net loss per common share is computed by dividing net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share is computed by giving effect to all potential dilutive shares of common stock. Basic and diluted net loss per share of common stock were the same for all periods presented as the impact of all potentially dilutive securities outstanding was anti-dilutive. The Company uses the if converted method for calculating any potential dilutive effect on diluted loss per share.

The following common equivalent shares were excluded from the diluted net loss per share calculation because their inclusion would have been anti-dilutive:

	As of September 30,
	2019		2018
Stock options		797,848		1,836,671
Convertible senior notes		3,411,199		3,411,199
Non-vested performance-based restricted stock units		594,723		93,362
Non-vested market-based restricted stock units		—		11,877
Non-vested restricted stock units		650,093		417,209
Total		5,453,863		5,770,318

The Company is required to reserve and keep available from the Company’s authorized but unissued shares of common stock a number of shares equal to the number of shares subject to outstanding awards under the 2008 Plan and the number of shares reserved for issuance under each of the 2016 Plan and 2016 ESPP.

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The amount of such shares of the Company’s common stock reserved for these purposes at September 30, 2019 is as follows:

	Number of Shares
Stock options issued and outstanding		797,848
Additional shares available for grant under equity plans		2,394,561
Total		3,192,409

In connection with the issuance of the Notes in November 2017, the Company paid $12.9 million to enter into capped call option agreements to reduce the potential dilution to holders of the Company’s common stock upon conversion of the Notes. The capped call option agreements are excluded from the calculation of diluted net loss per share attributable to common stockholders, as their effect is antidilutive.

(13) Income Taxes

The Company is subject to income tax in the United States as well as other tax jurisdictions in which it conducts business. Earnings from non-U.S. activities are subject to local country income tax. The Company does not provide for U.S. deferred income taxes on the undistributed earnings of its foreign subsidiaries as such earnings are reinvested indefinitely.

The Company’s tax provision for interim periods is determined using an estimate of its annual effective tax rate, adjusted for discrete items arising in that quarter. In each quarter, the Company updates its estimate of the annual effective tax rate, and if the estimated annual tax rate changes, the Company makes a cumulative adjustment in that quarter. The Company’s quarterly tax provision, and its quarterly estimate of its annual effective tax rate, are subject to significant volatility due to several factors, including the Company’s ability to accurately predict its pre-tax income and loss in multiple jurisdictions.

For the three months ended September 30, 2019 and 2018, the Company recorded a provision for income taxes of $0.1 million and $0.1 million, respectively, resulting in an effective tax rate of 0.77% and 1.03%, respectively. For the nine months ended September 30, 2019 and 2018, the Company recorded a provision for income taxes of $0.5 million and $0.4 million, respectively, resulting in an effective tax rate of 1.38% and 0.99%, respectively. During the current year periods, the effective tax rate is lower than the statutory federal tax rate as the Company was not able to benefit from its net operating losses due to its full valuation allowance.

As of September 30, 2019, the Company had gross tax-effected unrecognized tax provision of $0.6 million, of which $0.6 million, if recognized, would favorably impact the effective tax rate. The Company’s existing tax positions will continue to generate an increase in unrecognized tax benefits in subsequent periods. The Company’s policy is to record interest and penalties related to unrecognized tax benefits as income tax expense. During the three and nine months ended September 30, 2019 and 2018, the amounts recorded related to the accrual of interest and penalties were immaterial in each period.  

(14) Segment information

The Company operates as one operating segment. Operating segments are defined as components of an enterprise for which separate financial information is evaluated regularly by the chief operating decision maker (“CODM”), who is the Company’s chief executive officer, in deciding how to allocate resources and assess the Company’s financial and operational performance. While the Company has applications that address multiple use cases, all of the Company’s applications operate on and leverage a single technology platform and are deployed and sold in an identical way. In addition, the Company’s CODM evaluates the Company’s financial information and resources and assesses the performance of these resources on a consolidated basis. As a result, the Company has determined that the Company’s business operates in a single operating segment. Since the Company operates as one operating segment, all required financial segment information can be found in the consolidated financial statements.

(15) Revenue Recognition

The following table disaggregates the Company’s revenue by geography which provides information as to the major source of revenue (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
Primary Geographic Markets	2019		2018		2019		2018
United States	$	41,827	$	31,140	$	112,483	$	87,318
International		10,720		7,785		31,288		17,948
Total	$	52,547	$	38,925	$	143,771	$	105,266

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The following table presents the Company’s revenues disaggregated by revenue source (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Subscription services	$	46,385	$	35,998	$	132,043	$	98,327
Professional services		6,162		2,927		11,728		6,939
Total revenues	$	52,547	$	38,925	$	143,771	$	105,266

Contract Assets

The Company does not have material amounts of contract assets since revenue is recognized as control of goods is transferred or as services are performed. There are a small number of professional services that may occur over a period of time, but that period of time is generally very short in duration. Any contract assets that may arise are recorded in other assets in the Company’s consolidated balance sheet. As of September 30, 2019, the Company had $1.6 million in receivables related to services performed which were not billed.

Contract Liabilities

The Company’s contract liabilities consist of advance payments and deferred revenue. The Company’s contract liabilities are reported in a net position on a contract-by-contract basis at the end of each reporting period. The Company classifies advance payments and deferred revenue as current or noncurrent based on the timing of when it expects to recognize revenue. Generally, all contract liabilities are expected to be recognized within one year and are included in deferred revenue in the Company’s consolidated balance sheet. The noncurrent portion of deferred revenue is included and separately disclosed in the Company’s consolidated balance sheet.

Deferred Costs

Current deferred costs, which primarily consist of deferred sales commissions, were $7.7 million and $6.5 million as of September 30, 2019 and December 31, 2018, respectively. Noncurrent deferred costs, which primarily consist of deferred sales commissions, were $12.0 million and $10.3 million as of September 30, 2019 and December 31, 2018, respectively. During the three months ended September 30, 2019 and 2018, amortization expense for the deferred costs was $1.9 million and $1.4 million, respectively. During the nine months ended September 30, 2019 and 2018, amortization expense for the deferred costs was $5.5 million and $3.9 million, respectively. There was no impairment loss in relation to the costs capitalized for the three and nine months ended September 30, 2019 and the year ended December 31, 2018, respectively.

Deferred Revenue

$36.9 million and $77.0 million of subscription services revenue was recognized during the three and nine months ended September 30, 2019 and was included in the deferred revenue balances at the beginning of the respective period. $4.1 million and $5.2 million of professional services revenue was recognized during the three and nine months ended September 30, 2019 and was included in the deferred revenue balances at the beginning of the respective period.

As of September 30, 2019, approximately $250.9 million of revenue is expected to be recognized from remaining performance obligations for subscription contracts.        

The Company expects to recognize revenue on approximately $138.8 million of these remaining performance obligations over the next 12 months, with the balance recognized thereafter.

As of September 30, 2019, approximately $12.2 million of revenue is expected to be recognized from remaining performance obligations for professional services contracts. The Company expects to recognize revenue on approximately $8.7 million of these remaining performance obligations over the next 12 months, with the balance recognized thereafter.

(16) Leases

The Company’s leases relate primarily to office facilities that expire on various dates from 2019 through 2027. The terms of the Company's non-cancelable operating lease arrangements typically contain fixed lease payment which increases over the term of the lease at fixed rates, rent holidays and provide for additional renewal periods. Lease expense is recognized over the term of the lease on a straight-line basis. All of the Company’s leases are classified as operating leases. The Company has determined that periods covered by options to extend the Company’s leases are excluded from the lease term as the Company is not reasonably certain the Company will exercise such options. Operating lease expense, including expenses related to short-term leases, were $1.2 million and $0.9 million for the three months ended September 30, 2019 and 2018, respectively, and $3.5 million and $2.6 million for the nine months ended September 30, 2019 and 2018, respectively.

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The Company records its ROU Assets within other assets (long term) and its operating lease liabilities within other current and long-term liabilities.

Additional information related to the Company’s leases as of and for the nine months ended September 30, 2019, is as follows (in thousands, except lease term and discount rate):

	September 30, 2019
Balance sheet information
ROU assets	$	13,824
Lease liabilities, current	$	3,514
Lease liabilities, non-current		12,714
Total lease liabilities	$	16,228
Supplemental data
Weighted average remaining lease term	4.33 years
Weighted average discount rate		7.00	%
Cash paid for amounts included in lease liabilities	$	2,648
ROU assets obtained in exchange for lease obligations	$	17,726

Maturities of lease liabilities as of September 30, 2019 were as follows (in thousands):

Year ending December 31,
2019 (for the remaining three months)	$	1,160
2020		4,487
2021		4,341
2022		4,044
2023		3,929
Thereafter		2,023
Total undiscounted lease payments		19,984
Less: imputed interest		(3,756	)
Total lease liabilities	$	16,228

The following table presents components of lease expense for the three and nine months ended September 30, 2019 (in thousands):

	Three Months Ended			Nine Months Ended
	September 30, 2019			September 30, 2019
Operating lease expense	$	1,069		$	2,802
Short-term lease expense(1)		138			690
		1,207			3,492
Less: Sublease income		(33	)		(45	)
Total lease expense	$	1,174		$	3,447

⁽¹⁾ Short-term lease expense includes all leases with lease terms ranging from less than one month to one year.

As of September 30, 2019, we do not have any leases that have not yet commenced that create significant rights and obligations.

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Fiscal year 2018 lease commitments in accordance with prior guidance

Future minimum lease payments under non-cancelable operating leases, including short-term leases as of September 30, 2019 were as follows (in thousands):

2019 (for the remaining three months)	$	1,221
2020		4,612
2021		4,341
2022		4,044
2023		3,929
Thereafter		2,023
Total minimum lease payments	$	20,170

(17) Commitments and Contingencies

Litigation

From time to time the Company may become involved in legal proceedings or be subject to claims arising in the ordinary course of business. Although the results of litigation and claims cannot be predicted with certainty, the Company currently believes that the final outcome of these ordinary course matters will not have a material adverse effect on its business, operating results, financial condition or cash flows. Regardless of the outcome, litigation can have an adverse impact because of defense and settlement costs, diversion of management resources and other factors.

Employee Contracts

The Company has entered into employment contracts with certain of the Company’s executive officers which provide for at-will employment. However, under the provisions of the contracts, the Company would incur severance obligations of up to twelve months of the executive’s annual base salary for certain events, such as involuntary terminations.

(18) Subsequent Events

The Company evaluated subsequent events and concluded that no subsequent events have occurred that would require recognition in the unaudited Condensed Consolidated Financial Statements or disclosure in the notes thereto.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with (i) our condensed consolidated financial statements and related notes appearing elsewhere in this Quarterly Report on Form 10-Q and (ii) our audited consolidated financial statements and the related notes and management’s discussion and analysis of financial condition and results of operations for the fiscal year ended December 31, 2018 included in our Annual Report on Form 10-K filed with the SEC on March 1, 2019. This Quarterly Report on Form 10-Q contains “forward-looking statements” within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). These statements are often identified by the use of words such as “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “project,” “will,” “would” or the negative or plural of these words or similar expressions or variations. Such forward-looking statements include, but are not limited to, statements with respect to our outlook; the impact of new accounting standards; our ability to service our debt; our business strategy, including with respect to potential acquisitions; plans and objectives of future operations; and our future financial and business performance. The events described in these forward-looking statements are subject to a number of risks, uncertainties, assumptions and other factors that could cause actual results and the timing of certain events to differ materially from future results expressed or implied by the forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those identified herein, and those discussed in the section titled “Risk Factors”, set forth in Part II, Item 1A of this Quarterly Report on Form 10-Q and in our other SEC filings. You should not rely upon forward-looking statements as predictions of future events. Furthermore, such forward-looking statements speak only as of the date of this report. Except as required by law, we undertake no obligation to update any forward-looking statements to reflect events or circumstances after the date of such statements.

Overview

Everbridge is a global software company that provides enterprise software applications that automate and accelerate organizations’ operational response to critical events in order to keep people safe and businesses running. During public safety threats such as active shooter situations, terrorist attacks or severe weather conditions, as well as critical business events such as IT outages, cyber-attacks or other incidents such as product recalls or supply-chain interruptions, over 4,800 global customers rely on the company’s Critical Event Management Platform to quickly and reliably aggregate and assess threat data, locate people at risk and responders able to assist, automate the execution of pre-defined communications processes through the secure delivery to over 100 different communication devices, and track progress on executing response plans. Our customers use our platform to identify and assess hundreds of different types of threats to their organizations, people, assets or brand. Our solutions enable organizations to deliver intelligent, contextual messages to, and receive verification of delivery from, hundreds of millions of recipients, across multiple communications modalities such as voice, SMS and e-mail, in over 200 countries and territories, in 22 languages and dialects – all simultaneously. Our Critical Event Management platform is comprised of a comprehensive set of software applications that address the full spectrum of tasks an organization has to perform to manage a critical event, including Mass Notification, Incident Management, Safety Connection, IT Alerting, Visual Command Center, Public Warning, Crisis Management, Community Engagement and Secure Messaging. We believe that our broad suite of integrated, enterprise applications delivered via a single global platform is a significant competitive advantage in the market for Critical Event Management solutions, which we refer to generally as CEM.

Our customer base has grown from 867 customers at the end of 2011 to more than 4,800 customers as of September 30, 2019. As of September 30, 2019, our customers were based in 50 countries and included  9 of the 10 largest U.S. cities, 8 of the 10 largest U.S.-based investment banks, 46 of the 50 busiest North American airports, 6 of the 10 largest global consulting firms, 6 of the 10 largest global automakers, all 4 of the largest global accounting firms, 9 of the 10 largest U.S.-based health care providers and 5 of the 10 largest U.S.-based health insurers. We provide our applications to customers of varying sizes, including enterprises, small businesses, non-profit organizations, educational institutions and governmental agencies. Our customers span a wide variety of industries including technology, energy, financial services, healthcare and life sciences, manufacturing, media and entertainment, retail, higher education and professional services.

We sell all of our critical event management applications on a subscription basis. We generally enter into contracts that range from one to three years in length, with an average contract duration of 2.3 years as of September 30, 2019, and generally bill and collect payment annually in advance. We derive most of our revenue from subscriptions to applications. Over 90% of the revenue that we recognized in each of the eight most recently completed quarters was generated from contracts entered into in prior quarters or renewals of those contracts; the balance of the revenue that we recognized in each such quarter was generated from contracts entered into with new customers or new contracts, other than renewals, entered into with existing customers in such quarter. Historically, we derived more than 60% of our revenue in each of the last three fiscal years from sales of our Mass Notification application. Our pricing model is based on the number of applications subscribed to and, per application, the number of people, locations and things connected to our platform as well as the volume of communications. We also offer premium services including data feeds for social media, threat intelligence and weather. We generate additional revenue by expanding the number of applications that our customers subscribe to and the number of contacts and devices connected to our platform.

We generated revenue of $52.5 million and $38.9 million for the three months ended September 30, 2019 and 2018, respectively, representing a period-over-period increase of 35%. We generated revenue of $143.8 million and $105.3 million for the nine months ended September 30, 2019 and 2018, respectively, representing a period-over-period increase of 37%. We had net losses of $12.9

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million and $8.5 million for the three months ended September 30, 2019 and 2018, respectively. We had net losses of $39.1 million and $37.7 million for the nine months ended September 30, 2019 and 2018, respectively. Our adjusted earnings before interest taxes depreciation and amortization (“EBITDA”) which is a measure that is not calculated and presented in accordance with generally accepted accounting principles in the United States (“GAAP”) was $1.6 million and $0.2 million for the three months ended September 30, 2019 and 2018, respectively, and $0.1 million and $(3.5) million for the nine months ended September 30, 2019 and 2018, respectively. See “Other Metrics” below for a discussion of the limitations of adjusted EBITDA and a reconciliation of adjusted EBITDA to net loss, the most directly comparable financial measure calculated and presented in accordance with GAAP.

As of September 30, 2019 and 2018, 28% and 29% of our customers, respectively, were located outside of the United States and these customers generated 20% and 20% of our total revenue for the three months ended September 30, 2019 and 2018, respectively and 22% and 17% of our total revenue for the nine months ended September 30, 2019 and 2018, respectively.

We have focused on rapidly growing our business and believe that the future growth of our business is dependent on many factors, including our ability to increase the functionality of our platform and applications, expand our customer base, accelerate adoption of our applications beyond Mass Notification within our existing customer base and expand our international presence. Our future growth will also depend on the growth in the market for critical event management solutions and our ability to effectively compete. In order to further penetrate the market for critical event management solutions and capitalize on what we believe to be a significant opportunity, we intend to continue to invest in research and development, build-out our data center infrastructure and services capabilities and hire additional sales representatives, both domestically and internationally, to drive sales to new customers and incremental sales of new applications to existing customers. Nevertheless, we expect to continue to incur losses in the near term and, if we are unable to achieve our growth objectives, we may not be able to achieve profitability.

Recent Developments

In July 2019, we entered into a Membership Interest Purchase Agreement with NC4 Inc., NC4 Public Sector LLC, and Celerium Group Inc., pursuant to which we purchased all of the issued and outstanding membership interest of NC4 Inc. and NC4 Public Sector LLC (collectively, “NC4”) for total consideration of approximately $84.5 million. We paid approximately $51.7 million in cash at closing and paid the remaining purchase price with 320,998 newly issued shares of our common stock. On the date of this acquisition, the price of our common stock on the Nasdaq Global Market was $102.18 per share. Our acquisition of NC4 was made primarily to expand the Company’s customer base and to a lesser extent to complement some of the existing facets of NC4’s business with the Company’s existing products.  

Presentation of Financial Statements

Our consolidated financial statements include the accounts of our wholly-owned subsidiaries. Business acquisitions are included in our consolidated financial statements from the date of the acquisition. Our purchase accounting resulted in all assets and liabilities of acquired businesses being recorded at their estimated fair values on the acquisition dates. All intercompany balances and transactions have been eliminated in consolidation.

We report our financial results as one operating segment. Our operating results are regularly reviewed on a consolidated basis by our chief executive officer, who is our chief operating decision maker, principally to make strategic decisions regarding how we allocate our resources and to assess our consolidated operating performance.

Components of Results of Operations

Revenue

We derive substantially all of our revenue from the sale of subscriptions to our critical event management and enterprise safety applications.

We generally bill and collect payment for our subscriptions annually in advance. All revenue billed in advance of services being delivered is recorded in deferred revenue. The initial subscription period typically ranges from one to three years. We offer varying levels of customer support based on customer needs and the complexity of their businesses, including the level of usage by a customer in terms of minutes or the amount of data used to transmit the notifications. Our pricing model is based on the number of applications subscribed to and, per application, the number of people, locations and things connected to our platform as well as the volume of communications. We also offer premium services including data feeds for social media, threat intelligence and weather. We generate additional revenue by expanding the number of premium features and applications that our customers subscribe to and the number of contacts connected to our platform.

We also sell professional services, which primarily consist of fees for deployment and optimization services, as well as training. In addition, on occasion we may sell our software and related post contract support for on premise usage which is outside of our core business. These sales have been to a limited number of customers and is not a significant revenue stream for the Company.

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Cost of Revenue

Cost of revenue includes expenses related to the fulfillment of our subscription services, consisting primarily of employee-related expenses for data center operations and customer support, including salaries, bonuses, benefits and stock-based compensation expense. Cost of revenue also includes hosting costs, messaging costs and depreciation and amortization. As we add data center capacity and support personnel in advance of anticipated growth, our cost of revenue will increase and, if anticipated revenue growth does not occur, our gross profit will be adversely affected.

Operating Expenses

Operating expenses consist of sales and marketing, research and development and general and administrative expenses. Salaries, bonuses, stock-based compensation expense and other personnel costs are the most significant components of each of these expense categories. We include stock-based compensation expense incurred in connection with the grant of stock options within the applicable operating expense category based on the equity award recipient’s functional area.

Sales and Marketing

Sales and marketing expense primarily consists of employee-related expenses for sales, marketing and public relations employees, including salaries, bonuses, commissions, benefits and stock-based compensation expense. Sales and marketing expense also includes trade show, market research, advertising and other related external marketing expense as well as office and software related costs to support sales. We defer certain sales commissions related to acquiring new customers and amortize these expenses ratably over the period of benefit that we have determined to be four years. We plan to continue to expand our sales and marketing functions to grow our customer base and increase sales to existing customers. This growth will include adding sales personnel and expanding our marketing activities to continue to generate additional leads and build brand awareness. In the near term, we expect our sales and marketing expense to increase on an absolute dollar basis as we hire new sales representatives in the United States and worldwide and grow our marketing staff.

Research and Development

Research and development expense primarily consists of employee-related expenses for research and development staff, including salaries, bonuses, benefits and stock-based compensation expense. Research and development expense also includes the cost of certain third-party services, office related costs to support research and development activities, software subscriptions and hosting costs. We capitalize certain software development costs that are attributable to developing new applications and adding incremental functionality to our platform and amortize these costs over the estimated life of the new application or incremental functionality, which is generally three years. We focus our research and development efforts on improving our applications, developing new applications and delivering new functionality. In the near term, we expect our research and development expense to increase on an absolute dollar basis as we continue to increase the functionality of our platform and applications.

General and Administrative

General and administrative expense primarily consists of employee-related expenses for administrative, legal, finance and human resource personnel, including salaries, bonuses, benefits and stock-based compensation expense. General and administrative expense also includes professional fees, insurance premiums, corporate expenses, transaction-related costs, office-related expenses, facility costs, depreciation and amortization and software license costs. In the near term, we expect our general and administrative expense to increase on an absolute dollar basis as we incur the costs associated with being a publicly traded company.

Interest and Investment Income

Interest income consists of interest earned on our cash balances held at financial institutions. Investment income consist of interest earned on our short-term investments which consist of U.S. treasuries, U.S. government agency obligations and money market funds.

Interest Expense

Interest expense consists of interest on our outstanding debt obligations.

Other Income and Expense, Net

Other expense, net consists primarily of realized foreign currency gains and losses.

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Results of Operations

The following tables set forth our results of operations for the periods presented and as a percentage of our total revenue for those periods. The period-to-period comparison of our historical results is not necessarily indicative of the results that may be expected in the future.

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
	(in thousands)
Revenue	$	52,547		$	38,925		$	143,771		$	105,266
Cost of revenue(1) (2)		16,454			12,296			45,174			33,488
Gross profit		36,093			26,629			98,597			71,778
Operating expenses:
Sales and marketing(1)(2)		21,903			16,348			63,989			51,303
Research and development(1) (2)		12,877			10,350			37,164			30,548
General and administrative(1) (2)		13,435			7,130			34,457			23,609
Total operating expenses		48,215			33,828			135,610			105,460
Operating loss		(12,122	)		(7,199	)		(37,013	)		(33,682	)
Other income (expense), net		(700	)		(1,165	)		(1,574	)		(3,657	)
Loss before income taxes		(12,822	)		(8,364	)		(38,587	)		(37,339	)
Provision for income taxes		(99	)		(86	)		(531	)		(371	)
Net loss	$	(12,921	)	$	(8,450	)	$	(39,118	)	$	(37,710	)

⁽¹⁾ Includes stock-based compensation expense as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Cost of revenue	$	509	$	312	$	1,356	$	1,877
Sales and marketing		2,423		1,180		7,338		7,147
Research and development		1,732		1,091		5,560		5,606
General and administrative		3,637		958		9,840		5,627
Total	$	8,301	$	3,541	$	24,094	$	20,257

⁽²⁾ Includes depreciation and amortization of acquired intangible assets as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Cost of revenue	$	2,451	$	2,087	$	6,712	$	5,909
Sales and marketing		203		80		544		239
Research and development		130		68		371		204
General and administrative		2,708		1,609		5,565		3,820
Total	$	5,492	$	3,844	$	13,192	$	10,172

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The following table sets forth our consolidated statements of operations as a percentage of revenue ⁽¹⁾:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Revenue		100	%		100	%		100	%		100	%
Cost of revenue		31	%		32	%		31	%		32	%
Gross profit		69	%		68	%		69	%		68	%
Operating expenses:
Sales and marketing		42	%		42	%		45	%		49	%
Research and development		25	%		27	%		26	%		29	%
General and administrative		26	%		18	%		24	%		22	%
Total operating expenses		92	%		87	%		94	%		100	%
Operating loss		(23	)%		(18	)%		(26	)%		(32	)%
Other income (expense), net		(1	)%		(3	)%		(1	)%		(3	)%
Loss before income taxes		(24	)%		(21	)%		(27	)%		(35	)%
Provision for income taxes	*			*			*			*
Net loss		(24	)%		(21	)%		(27	)%		(35	)%

⁽¹⁾ Columns may not add up to 100% due to rounding.

^* Represents less than 0.5% of revenue.

Comparison of the Three Months Ended September 30, 2019 and 2018

Revenue

	Three Months Ended September 30,				Change
	2019		2018		$		%
	(dollars in thousands)
Revenue	$	52,547	$	38,925	$	13,622		35.0	%

Revenue increased by $13.6 million for the three months ended September 30, 2019 compared to the same period in 2018. The increase was due to a $13.6 million increase in sales of our products driven by expansion of our customer base from 4,267 customers as of September 30, 2018 to 4,851 customers as of September 30, 2019, including increased sales to larger organizations with greater numbers of contacts and locations.

Cost of Revenue

	Three Months Ended September 30,						Change
	2019			2018			$		%
	(dollars in thousands)
Cost of revenue	$	16,454		$	12,296		$	4,158		33.8	%
Gross margin %		69	%		68	%

Cost of revenue increased by $4.2 million for the three months ended September 30, 2019 compared to the same period in 2018. The increase was due to a $2.3 million increase in employee-related costs associated with our increased headcount from 163 employees as of September 30, 2018 to 228 employees as of September 30, 2019. In addition, $1.8 million of the increase was attributed to an increase in hosting, software and messaging costs and $0.4 million increase in depreciation and amortization expense attributed to our fixed assets, acquired intangibles and capitalized software. These increases were offset by $0.4 million of capitalized internally developed software costs.

Gross margin percentage increased due to revenue growth outpacing the increase in cost.

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Operating Expenses

Sales and Marketing Expense

	Three Months Ended September 30,						Change
	2019			2018			$		%
	(dollars in thousands)
Sales and marketing	$	21,903		$	16,348		$	5,555		34.0	%
% of revenue		42	%		42	%

Sales and marketing expense increased by $5.6 million for the three months ended September 30, 2019 compared to the same period in 2018. The increase was primarily due to a $5.1 million increase in stock compensation and employee-related costs associated with our increased headcount from 292 employees as of September 30, 2018 to 338 employees as of September 30, 2019. The remaining increase was principally the result of a $0.3 million increase in office related expenses to support the sales team and a $0.2 million increase in advertising related cost and trade show expense.

Research and Development Expense

	Three Months Ended September 30,						Change
	2019			2018			$		%
	(dollars in thousands)
Research and development	$	12,877		$	10,350		$	2,527		24.4	%
% of revenue		25	%		27	%

Research and development expense increased by $2.5 million for the three months ended September 30, 2019 compared to the same period in 2018. The increase was primarily due to a $2.2 million increase in employee-related costs associated with our increased headcount from 236 employees as of September 30, 2018 to 251 employees as of September 30, 2019. A total of $2.2 million of internally developed software costs during the three months ended September 30, 2018 and $1.6 million of internally developed software costs during the three months ended September 30, 2019 were capitalized, resulting in an increase of the expense by $0.6 million in the third quarter of 2019.

General and Administrative Expense

	Three Months Ended September 30,						Change
	2019			2018			$		%
	(dollars in thousands)
General and administrative	$	13,435		$	7,130		$	6,305		88.4	%
% of revenue		26	%		18	%

General and administrative expense increased by $6.3 million for the three months ended September 30, 2019 compared to the same period in 2018. The increase was primarily due to a $4.1 million increase in stock compensation and employee-related costs associated with our increased headcount from 92 employees as of September 30, 2018 to 111 employees as of September 30, 2019. The remaining increase was due to a $1.1 million increase in depreciation and amortization, a $0.5 million increase in office related expenses to support the administrative team, a $0.3 million increase in public company cost and $0.1 million in software costs to support the administrative team.

Other Income (Expense), Net

	Three Months Ended September 30,						Change
	2019			2018			$		%
	(dollars in thousands)
Other income (expense), net	$	(700	)	$	(1,165	)	$	465		39.9	%
% of revenue		(1	)%		(3	)%

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Other expense decreased by $0.5 million for the three months ended September 30, 2019 compared to the same period in 2018 as we raised $139.1 million, net of cost in January 2019 from our follow-on offering, resulting in a $0.6 million increase in interest income.

Comparison of the Nine Months Ended September 30, 2019 and 2018

Revenue

	Nine Months Ended September 30,				Change
	2019		2018		$		%
	(dollars in thousands)
Revenue	$	143,771	$	105,266	$	38,505		36.6	%

Revenue increased by $38.5 million for the nine months ended September 30, 2019 compared to the same period in 2018. The increase was due to a $38.5 million increase in sales of our products driven by expansion of our customer base from 4,267 customers as of September 30, 2018 to 4,851 customers as of September 30, 2019, including increased sales to larger organizations with greater numbers of contacts and locations.

Cost of Revenue

	Nine Months Ended September 30,						Change
	2019			2018			$		%
	(dollars in thousands)
Cost of revenue	$	45,174		$	33,488		$	11,686		34.9	%
Gross margin %		69	%		68	%

Cost of revenue increased by $11.7 million for the nine months ended September 30, 2019 compared to the same period in 2018. The increase was primarily due to a $7.6 million increase in hosting, software and messaging costs and a $3.8 million increase in employee-related costs associated with our increased headcount from 163 employees as of September 30, 2018 to 228 employees as of September 30, 2019. The remaining increase was principally the result of a $0.8 million increase in depreciation and amortization expense attributed to our fixed assets, acquired intangibles and capitalized software and a $0.4 million increase in office related expenses to support revenue generating activities. These increases were partially offset by $1.2 million of capitalized internally developed software costs.

Gross margin percentage increased due to revenue growth outpacing the increase in cost along with a reduction of stock compensation expense.

Operating Expenses

Sales and Marketing Expense

	Nine Months Ended September 30,						Change
	2019			2018			$		%
	(dollars in thousands)
Sales and marketing	$	63,989		$	51,303		$	12,686		24.7	%
% of revenue		45	%		49	%

Sales and marketing expense increased by $12.7 million for the nine months ended September 30, 2019 compared to the same period in 2018. The increase was primarily due to a $10.7 million increase in employee-related costs associated with our increased headcount from 292 employees as of September 30, 2018 to 338 employees as of September 30, 2019. The remaining increase was principally the result of a $0.9 million increase in office related expenses to support revenue generating activities, a $0.8 million increase in advertising related costs and trade show expenses and a $0.2 million increase in software cost to support the sales team.

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Research and Development Expense

	Nine Months Ended September 30,						Change
	2019			2018			$		%
	(dollars in thousands)
Research and development	$	37,164		$	30,548		$	6,616		21.7	%
% of revenue		26	%		29	%

Research and development expense increased by $6.6 million for the nine months ended September 30, 2019 compared to the same period in 2018. The increase was primarily due to a $4.1 million increase in employee-related costs associated with our increased headcount from 236 employees as of September 30, 2018 to 251 employees as of September 30, 2019. The remaining increase was principally the result of a $0.8 million increase in hosting and software cost and a $0.2 million increase in office related expenses to support research and development activities. A total of $6.5 million of internally developed software costs during the nine months ended September 30, 2018 and $5.0 million of internally developed software costs during the nine months ended September 30, 2019 were capitalized, resulting in an increase of the expense by $1.5 million in the 2019 period.

General and Administrative Expense

	Nine Months Ended September 30,						Change
	2019			2018			$		%
	(dollars in thousands)
General and administrative	$	34,457		$	23,609		$	10,848		45.9	%
% of revenue		24	%		22	%

General and administrative expense increased by $10.8 million for the nine months ended September 30, 2019 compared to the same period in 2018. The increase was primarily due to a $6.6 million increase in employee-related costs associated with our increased headcount from 92 employees as of September 30, 2018 to 111 employees as of September 30, 2019. The remaining increase was due to a $1.7 million increase in depreciation and amortization expense attributable to our acquired intangible assets, a $1.0 million increase in office related expenses to support the administrative team, a $0.9 million increase in cost to operate as a public company and $0.3 million increase in software costs to support the administrative team.

Other Income (Expense), Net

	Nine Months Ended September 30,						Change
	2019			2018			$		%
	(dollars in thousands)
Other income (expense), net	$	(1,574	)	$	(3,657	)	$	2,083		57.0	%
% of revenue		(1	)%		(3	)%

Other expense decreased by $2.1 million for the nine months ended September 30, 2019 compared to the same period in 2018 as we raised $139.1 million as a result of proceeds invested from our public offerings increasing interest and investment income by $2.2 million.

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Other Metrics

We regularly monitor a number of financial and operating metrics in order to measure our current performance and estimate our future performance. Our other business metrics may be calculated in a manner different than similar other business metrics used by other companies (in thousands):

	Three Months Ended September 30,					Nine Months Ended September 30,
	2019		2018			2019			2018
Adjusted EBITDA	$	1,636	$	153		$	144		$	(3,490	)
Adjusted gross margin		37,242		27,330			101,283			74,677
Free cash flow		9,883		(2,449	)		(1,430	)		(8,353	)

• Adjusted EBITDA. Adjusted EBITDA represents our net loss before interest and investment income and interest expense, income tax expense and benefit, depreciation and amortization expense and stock-based compensation expense. We do not consider these items to be indicative of our core operating performance. The items that are non-cash include depreciation and amortization expense and stock-based compensation expense. Adjusted EBITDA is a measure used by management to understand and evaluate our core operating performance and trends and to generate future operating plans, make strategic decisions regarding the allocation of capital and invest in initiatives that are focused on cultivating new markets for our solutions. In particular, the exclusion of certain expenses in calculating adjusted EBITDA facilitates comparisons of our operating performance on a period-to-period basis. Adjusted EBITDA is not a measure calculated in accordance with GAAP. We believe that adjusted EBITDA provides useful information to investors and others in understanding and evaluating our operating results in the same manner as our management and board of directors. Nevertheless, use of adjusted EBITDA has limitations as an analytical tool, and you should not consider it in isolation or as a substitute for analysis of our financial results as reported under GAAP. Some of these limitations are: (1) although depreciation and amortization are non-cash charges, the capitalized software that is amortized will need to be replaced in the future, and adjusted EBITDA does not reflect cash capital expenditure requirements for such replacements or for new capital expenditure requirements; (2) adjusted EBITDA does not reflect changes in, or cash requirements for, our working capital needs; (3) adjusted EBITDA does not reflect the potentially dilutive impact of equity-based compensation; (4) adjusted EBITDA does not reflect tax payments or receipts that may represent a reduction or increase in cash available to us; and (5) other companies, including companies in our industry, may calculate adjusted EBITDA or similarly titled measures differently, which reduces the usefulness of the metric as a comparative measure. Because of these and other limitations, you should consider adjusted EBITDA alongside our other GAAP-based financial performance measures, net loss and our other GAAP financial results. The following table presents a reconciliation of adjusted EBITDA to net loss, the most directly comparable GAAP measure, for each of the periods indicated (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Net loss	$	(12,921	)	$	(8,450	)	$	(39,118	)	$	(37,710	)
Interest and investment (income) expense, net		665			1,132			1,445			3,420
Provision for income taxes		99			86			531			371
Depreciation and amortization expense		5,492			3,844			13,192			10,172
Stock-based compensation expense		8,301			3,541			24,094			20,257
Adjusted EBITDA	$	1,636		$	153		$	144		$	(3,490	)

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• Adjusted Gross Margin. Adjusted gross margin represents gross profit plus stock-based compensation and amortization of acquired intangibles. Adjusted gross margin is a measure used by management to understand and evaluate our core operating performance and trends and to generate future operating plans. The exclusion of stock-based compensation expense and amortization of acquired intangibles facilitates comparisons of our operating performance on a period-to-period basis. In the near term, we expect these expenses to continue to negatively impact our gross profit. Adjusted gross margin is not a measure calculated in accordance with GAAP. We believe that adjusted gross margin provides useful information to investors and others in understanding and evaluating our operating results in the same manner as our management and board of directors. Nevertheless, our use of adjusted gross margin has limitations as an analytical tool, and you should not consider it in isolation or as a substitute for analysis of our financial results as reported under GAAP. You should consider adjusted gross margin alongside our other GAAP-based financial performance measures, gross profit and our other GAAP financial results. The following table presents a reconciliation of adjusted gross margin to gross profit, the most directly comparable GAAP measure, for each of the periods indicated (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Gross profit	$	36,093	$	26,629	$	98,597	$	71,778
Amortization of acquired intangibles		640		389		1,330		1,022
Stock-based compensation expense		509		312		1,356		1,877
Adjusted gross margin	$	37,242	$	27,330	$	101,283	$	74,677

• Free Cash Flow. Free cash flow represents net cash provided by operating activities minus capital expenditures and capitalized software development costs. Free cash flow is a measure used by management to understand and evaluate our core operating performance and trends and to generate future operating plans. The exclusion of capital expenditures and amounts capitalized for internally-developed software facilitates comparisons of our operating performance on a period-to-period basis and excludes items that we do not consider to be indicative of our core operating performance. Free cash flow is not a measure calculated in accordance with GAAP. We believe that free cash flow provides useful information to investors and others in understanding and evaluating our operating results in the same manner as our management and board of directors. Nevertheless, our use of free cash flow has limitations as an analytical tool, and you should not consider it in isolation or as a substitute for analysis of our financial results as reported under GAAP. You should consider free cash flow alongside our other GAAP-based financial performance measures, net cash provided by operating activities, and our other GAAP financial results. The following table presents a reconciliation of free cash flow to net cash for operating activities, the most directly comparable GAAP measure, for each of the periods indicated (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Net cash provided by (used in) operating activities	$	12,343		$	676		$	8,854		$	(776	)
Capital expenditures		(542	)		(441	)		(4,417	)		(855	)
Capitalized software development costs		(1,918	)		(2,684	)		(5,867	)		(6,722	)
Free cash flow	$	9,883		$	(2,449	)	$	(1,430	)	$	(8,353	)

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Additional Supplemental Non-GAAP Financial Measures

To supplement our consolidated financial statements, which are prepared and presented in accordance with GAAP, we provide investors with certain additional supplemental non-GAAP financial measures, including non-GAAP cost of revenue, non-GAAP gross profit, non-GAAP sales and marketing expense, non-GAAP research and development expense, non-GAAP general and administrative expense, non-GAAP total operating expenses, non-GAAP operating loss and non-GAAP net loss, which we collectively refer to as non-GAAP financial measures. These non-GAAP financial measures exclude all or a combination of the following (as reflected in the following reconciliation tables): stock-based compensation expense and amortization of acquired intangibles. The presentation of the non-GAAP financial measures is not intended to be considered in isolation or as a substitute for, or superior to, the financial information prepared and presented in accordance with GAAP. We use these non-GAAP financial measures for financial and operational decision-making purposes and as a means to evaluate period-to-period comparisons. We believe that these non-GAAP financial measures provide useful information about our operating results, enhance the overall understanding of past financial performance and future prospects and allow for greater transparency with respect to metrics used by our management in its financial and operational decision making. While our non-GAAP financial measures are an important tool for financial and operational decision making and for evaluating our own operating results over different periods of time, you should consider our non-GAAP financial measures alongside our GAAP financial results.

We exclude stock-based compensation expense because of varying available valuation methodologies, subjective assumptions and the variety of equity instruments that can impact our non-cash expense. We believe that providing non-GAAP financial measures that exclude stock-based compensation expense allow for more meaningful comparisons between our operating results from period to period. We believe that excluding the impact of amortization of acquired intangibles allows for more meaningful comparisons between operating results from period to period as the intangibles are valued at the time of acquisition and are amortized over a period of several years after the acquisition. Accordingly, we believe that excluding these expenses provides investors and management with greater visibility of the underlying performance of our business operations, facilitates comparison of our results with other periods and may also facilitate comparison with the results of other companies in our industry.

There are limitations in using non-GAAP financial measures because the non-GAAP financial measures are not prepared in accordance with GAAP, may be different from non-GAAP financial measures used by other companies and exclude expenses that may have a material impact upon our reported financial results. Further, stock-based compensation expense has been and will continue to be for the foreseeable future a significant recurring expense in our business and an important part of the compensation provided to our employees.

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The following table reconciles our GAAP to non-GAAP numbers for the three and nine months ended September 30, 2019 and 2018 (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Cost of revenue	$	16,454		$	12,296		$	45,174		$	33,488
Amortization of acquired intangibles		(640	)		(389	)		(1,330	)		(1,022	)
Stock-based compensation expense		(509	)		(312	)		(1,356	)		(1,877	)
Non-GAAP cost of revenue	$	15,305		$	11,595		$	42,488		$	30,589
Gross profit	$	36,093		$	26,629		$	98,597		$	71,778
Amortization of acquired intangibles		640			389			1,330			1,022
Stock-based compensation expense		509			312			1,356			1,877
Non-GAAP gross profit	$	37,242		$	27,330		$	101,283		$	74,677
Non-GAAP gross margin		70.9	%		70.2	%		70.4	%		70.9	%
Sales and marketing expense	$	21,903		$	16,348		$	63,989		$	51,303
Stock-based compensation expense		(2,423	)		(1,180	)		(7,338	)		(7,147	)
Non-GAAP sales and marketing	$	19,480		$	15,168		$	56,651		$	44,156
Research and development expense	$	12,877		$	10,350		$	37,164		$	30,548
Stock-based compensation expense		(1,732	)		(1,091	)		(5,560	)		(5,606	)
Non-GAAP research and development	$	11,145		$	9,259		$	31,604		$	24,942
General and administrative expense	$	13,435		$	7,130		$	34,457		$	23,609
Amortization of acquired intangibles		(2,530	)		(1,464	)		(5,082	)		(3,461	)
Stock-based compensation expense		(3,637	)		(958	)		(9,840	)		(5,627	)
Non-GAAP general and administrative	$	7,268		$	4,708		$	19,535		$	14,521
Total operating expenses	$	48,215		$	33,828		$	135,610		$	105,460
Amortization of acquired intangibles		(2,530	)		(1,464	)		(5,082	)		(3,461	)
Stock-based compensation expense		(7,792	)		(3,229	)		(22,738	)		(18,380	)
Non-GAAP total operating expenses	$	37,893		$	29,135		$	107,790		$	83,619
Operating loss	$	(12,122	)	$	(7,199	)	$	(37,013	)	$	(33,682	)
Amortization of acquired intangibles		3,170			1,853			6,412			4,483
Stock-based compensation expense		8,301			3,541			24,094			20,257
Non-GAAP operating loss	$	(651	)	$	(1,805	)	$	(6,507	)	$	(8,942	)
Net loss	$	(12,921	)	$	(8,450	)	$	(39,118	)	$	(37,710	)
Amortization of acquired intangibles		3,170			1,853			6,412			4,483
Stock-based compensation expense		8,301			3,541			24,094			20,257
Non-GAAP net loss	$	(1,450	)	$	(3,056	)	$	(8,612	)	$	(12,970	)

Liquidity and Capital Resources

To date, we have financed our operations primarily through cash from sales to our customers, along with equity issuances and debt financing arrangements. Our principal source of liquidity is cash and cash equivalents totaling $194.7 million as of September 30, 2019, which includes $139.1 million received in January 2019 as a result of our public offering of common stock. We have generated significant losses since inception and expect to continue to generate losses for the foreseeable future.

We believe that our cash and cash equivalent balances and the cash flows generated by our operations will be sufficient to satisfy our anticipated cash needs for working capital and capital expenditures for at least the next 12 months. However, our belief may prove to be incorrect, and we could utilize our available financial resources sooner than we currently expect. Our future capital requirements and the adequacy of available funds will depend on many factors, including those set forth in the section of this Quarterly Report on Form 10-Q titled “Risk Factors.” We cannot assure you that we will be able to raise additional capital on acceptable terms or at all. In addition, if we fail to meet our operating plan during the next 12 months, our liquidity could be adversely affected.

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Cash Flows

The following table summarizes our cash flows for the periods indicated (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Cash, cash equivalents and restricted cash at beginning of period	$	238,255		$	102,599		$	60,068		$	103,051
Cash provided by (used in) operating activities		12,343			676			8,854			(776	)
Cash used in investing activities		(50,615	)		(26,494	)		(21,770	)		(27,258	)
Cash provided by (used in) financing activities		(693	)		(406	)		152,190			2,023
Effects of exchange rates on cash		(175	)		(81	)		(227	)		(746	)
Cash, cash equivalents and restricted cash at end of period	$	199,115		$	76,294		$	199,115		$	76,294

Uses of Funds

Our historical uses of cash have primarily consisted of cash used for operating activities, such as expansion of our sales and marketing operations, research and development activities and other working capital needs.

Operating Activities

Our net loss and cash flows provided or used in by operating activities are significantly influenced by our investments in headcount and infrastructure to support our growth, marketing and sponsorship expenses, and our ability to bill and collect in a timely manner. Our net loss has been significantly greater than our use of cash for operating activities due to the inclusion of non-cash expenses and charges.

Operating activities generated $8.9 million in cash in the nine months ended September 30, 2019, which includes an increase in non-cash operating expenses of $47.0 million partially offset by our net loss of $39.1 million. Specifically, we recognized non-cash charges aggregating to $13.2 million for depreciation and amortization of intangible assets, capitalized software development costs and property and equipment, $24.1 million for stock-based compensation, $5.5 million for amortization of deferred commissions, $3.7 million related to the accretion of interest on our convertible senior notes and $0.6 million for provision for doubtful accounts. The net change in operating assets and liabilities of $0.9 million reflected a $12.4 million increase in deferred revenue, a $7.0 million net increase in accounts payable and accrued expenses as a result of timing of payments made to vendors, a $2.0 million increase in accrued employee related expenses due to timing of payments to employees, a $0.9 million decrease in other assets and a $0.6 million increase in other liabilities. These amounts were offset by an $8.4 million increase in accounts receivable, an $8.4 million increase in deferred cost and a $5.1 million increase in prepaid expenses for upfront payments made for prepaid software and insurance.

Operating activities used $0.8 million in cash in the nine months ended September 30, 2018, primarily from $0.4 million in cash used in operations as a result of changes in operating assets and liabilities, which was decreased by $37.3 million of non-cash operating expenses and offset by our net loss of $37.7 million. Specifically, we recognized non-cash charges aggregating to $10.2 million for depreciation and amortization of intangible assets, capitalized software development costs and property and equipment, $20.0 million for stock-based compensation, $3.9 million for amortization of deferred commissions and $3.4 million related to the accretion of interest on our convertible senior notes which was offset by a decrease of $0.3 million for our change in fair value of contingent consideration and $0.3 million of investment income. The change in operating assets and liabilities reflected a $7.2 million increase in deferred revenue, a $1.5 million decrease in accounts receivable, a $2.1 million increase in accrued employee related expenses due to timing of payments to employees, and a $0.5 million increase in other liabilities. These increases were partially offset by a $7.0 million increase in deferred cost, a $0.6 million increase in accrued expenses as a result of timing of payments made to vendors, a $2.4 million increase in prepaid expenses for upfront payments made for prepaid software and insurance, and a $1.6 million increase in other assets.

Investing Activities

Our investing activities consist primarily of capital expenditures for capitalized software development costs, business acquisitions, property and equipment expenses and purchase and sales of short-term investments.

We used $21.8 million in cash for investing activities in the nine months ended September 30, 2019, due to $58.4 million cash paid for the acquisitions of NC4 and Mission Mode, $5.9 million investment in software development, $4.4 million purchase of property and equipment and $2.0 million in purchases of short-term investments. These were offset by maturities of short-term investments of $47.8 million and $1.1 million attributed to a landlord reimbursement.

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Investing activities used $27.3 million in cash in the nine months ended September 30, 2018, primarily from our purchase of UMS, PlanetRisk and Respond for an aggregate of $35.9 million, purchase of short-term investments of $57.7 million, investment in software development of $6.7 million, our purchase of property and equipment of $0.9 million and a $0.2 million in purchases of intangible assets. This was offset by cash provided of $74.1 million in maturities of our short-term investments.

Financing Activities

Cash generated by financing activities includes proceeds from the issuance of common stock from our follow-on public offering, exercise of employee stock options and contributions to our employee stock purchase plan. Cash used in financing activities includes payments for debt and offering issuance costs, payment of contingent consideration and employee withholding liabilities from the exercise of market based restricted stock units.

Financing activities provided $152.2 million of cash in the nine months ended September 30, 2019, which reflects proceeds of $139.1 million from our common stock offering, proceeds of $15.8 million from the exercise of stock options and $2.3 million from the issuance of stock under our employee stock purchase plan. These were offset by a $4.5 million payment for restricted stock unit employee withholding taxes.

Financing activities provided $2.0 million of cash in the nine months ended September 30, 2018, which reflects proceeds of $1.8 million from the issuance of stock under our employee stock purchase plan and proceeds of $8.8 million from the exercise of stock options. This amount was offset by a $7.9 million payment for employee withholding taxes and $0.4 million of contingent consideration related to our acquisition of IDV.

Critical Accounting Policies

Our condensed consolidated financial statements are prepared in accordance with GAAP. The preparation of these condensed consolidated financial statements requires us to make certain estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, costs and expenses, and related disclosures. On an ongoing basis, we evaluate our estimates and assumptions. Our actual results may differ from these estimates under different assumptions or conditions.

Except for the accounting policies for leases that were updated, as set forth in footnote 2 and 16, as a result of adopting ASU No. 2016-02, there have been no changes to our critical accounting policies and estimates described in the Annual Report on Form 10-K for the year ended December 31, 2018, filed with the SEC on March 1, 2019, that have had a material impact on our condensed consolidated financial statements and related notes.

Recently Issued Accounting Pronouncements

See Note 2 of the notes to our unaudited condensed consolidated financial statements included elsewhere in this Quarterly Report on Form 10-Q for a summary of recently issued and adopted accounting pronouncements.

Contractual Obligations and Commitments

As of September 30, 2019, there were no material changes in our commitments under contractual obligations except for scheduled payments from the ongoing business, as disclosed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2018.

Off-Balance Sheet Arrangements

We do not have any relationships with unconsolidated entities or financial partnerships, including entities sometimes referred to as structured finance or special purpose entities that were established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes. We do not engage in off-balance sheet financing arrangements. In addition, we do not engage in trading activities involving non-exchange traded contracts.

Item 3. Quantitative and Qualitative Disclosures About Market Risk.

Market risk represents the risk of loss that may impact our financial position due to adverse changes in financial market prices and rates. Our market risk exposure is primarily the result of fluctuations in interest rates and foreign exchange rates as well as, to a lesser extent, inflation.

Interest Rate Risk

Our investment portfolio is exposed to market risk from changes in interest rates. The fair market value of fixed rate securities may be adversely impacted by fluctuations in interest rates while income earned on floating rate securities may decline as a result of decreases in interest rates. Under our current policies, we do not use interest rate derivative instruments to manage exposure to interest rate changes. We attempt to ensure the safety and preservation of our invested principal funds by limiting default risk, market risk and reinvestment risk. We mitigate default risk by investing in investment grade securities. We have historically maintained a relatively short average maturity for our investment portfolio, and we believe a hypothetical 100 basis point adverse move in interest rates along the entire interest rate yield curve would not change the fair value of our interest sensitive financial instruments by a material amount. In addition, if a 100 basis point change in overall interest rates were to occur in 2019, our interest income would not change significantly in relation to amounts we would expect to earn, based on our cash, cash equivalents, and investments as of September 30, 2019.

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Changes in interest rates may also impact gains or losses from the conversion of our outstanding convertible senior notes. In November 2017, we issued $115 million in aggregate principal amount of our 1.50% convertible senior notes due 2022 (the “Notes”). At our election, the Notes are convertible into cash, shares of our common stock, or a combination of cash and shares of our common stock in each case under certain circumstances, including trading price conditions related to our common stock. In the second quarter of 2018, the trading price of our common stock reached a price for a sustained period at 130% above the conversion price of $33.71, resulting in the Notes becoming convertible at the option of the holder during the third quarter of 2018. No Note holders have exercised their right for conversion as of September 30, 2019. Upon conversion, we are required to record a gain or loss for the difference between the fair value of the debt to be extinguished and its corresponding net carrying value. The fair value of the debt to be extinguished depends on our then-current incremental borrowing rate. If our incremental borrowing rate at the time of conversion is higher or lower than the implied interest rate of the Notes, we will record a gain or loss in our consolidated statement of operations during the period in which the Notes are converted. An incremental borrowing rate that is a hypothetical 100 basis points lower than the implicit interest rate upon conversion of $115 million aggregate principal amount of the Notes would result in a loss of approximately $1.2 million.

We are exposed to interest rate risk in the ordinary course of our business. Our cash, cash equivalents and investments include cash in readily available checking and money market accounts and marketable securities. These securities are not dependent on interest rate fluctuations that may cause the principal amount of these assets to fluctuate.

We had cash and cash equivalents of $194.7 million as of September 30, 2019, which consisted of bank deposits and money market funds. To date, fluctuations in interest income have not been significant.

We do not enter into investments for trading or speculative purposes and have not used any derivative financial instruments to manage our interest rate risk exposure. A hypothetical 10% change in interest rates during any of the periods presented would not have had a material impact on our financial statements.

Foreign Currency Exchange Risk

We have foreign currency risks related to our revenue and operating expenses denominated in currencies other than our functional currency, the U.S. dollar, principally British Pounds, Norwegian Krone and Swedish Kronor. Movements in foreign currencies in which we transact business could significantly affect future net earnings. We do not currently engage in any hedging activity to reduce our potential exposure to currency fluctuations, although we may choose to do so in the future. A hypothetical 10% change in foreign exchange rates during any of the periods presented would not have had a material impact on our consolidated financial statements. As our international operations grow, we will continue to reassess our approach to manage our risk relating to fluctuations in foreign currency rate.

Inflation Risk

We do not believe that inflation has 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

We maintain “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure.

Our management, with the participation of our principal executive officer and principal financial officer, has evaluated the effectiveness of our disclosure controls and procedures as of the end of the period covered by this Quarterly Report on Form 10-Q. Based on such evaluation, our principal executive officer and principal financial officer have concluded that as of such date, our disclosure controls and procedures were effective at a reasonable assurance level.

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Changes in Internal Control

There were no changes in our internal control over financial reporting identified in management's evaluation pursuant to Rules 13a-15(d) or 15d-15(d) of the Exchange Act 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.

Inherent Limitations on Effectiveness of Controls

Our management, including our principal executive officer and principal financial officer, does not expect that our disclosure controls and procedures or our internal control over financial reporting will prevent or detect all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company have been detected. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Over time, controls may become inadequate because of changes in conditions, or the degree of compliance with the policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

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PART II—OTHER INFORMATION

Item 1. Legal Proceedings.

From time to time we may become involved in legal proceedings or be subject to claims arising in the ordinary course of our business. We are not presently a party to any legal proceedings that, if determined adversely to us, would individually or taken together have a material adverse effect on our business, operating results, financial condition or cash flows. Regardless of the outcome, litigation can have an adverse impact on us because of defense and settlement costs, diversion of management resources and other factors.

Item 1A. Risk Factors.

We operate in a rapidly changing environment that involves a number of risks which could materially affect our business, financial condition or future results, some of which are beyond our control. In addition to the other information set forth in this Quarterly Report on Form 10-Q, the risks and uncertainties that we believe are most important for you to consider are discussed in Part I-Item 1A under the heading “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2018, as filed with the SEC on March 1, 2019. During the nine months ended September 30, 2019, there were no material changes to the risk factors that were disclosed in our Annual Report on Form 10-K for the year ended December 31, 2018.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

(a) Recent Sales of Unregistered Equity Securities

The information set forth in Item 3.02 of our Current Report on Form 8-K filed with the SEC on August 2, 2019, is incorporated by reference into this Item 2.

(b) Use of Proceeds

None

(c) Issuer Purchase of Equity Securities

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.

			Incorporated by Reference
Exhibit No.	Exhibit Description	Filed Herewith	Form	File No.	Exhibit	Filing Date
2.1	Membership Interest Purchase Agreement dated July 29, 2019, by and among Everbridge, Inc., NC4 Inc., NC4 Public Sector LLC, and Celerium Group Inc.		8-K	001-37874	2.1	8/2/19
3.1	Amended and Restated Certificate of Incorporation of Everbridge, Inc.		8-K	001-37874	3.1	9/21/16
3.2	Amended and Restated Bylaws of Everbridge, Inc.		8-K	001-37874	3.2	9/21/16
10.2+	Employment Agreement, dated as of August 19, 2019, by and between Everbridge, Inc. and Vernon Irvin.	X
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 – the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL 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 - the cover page interactive data is embedded within the Inline XBRL document or included within the Exhibit 101 attachments.	X

* This certification is deemed not filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.

+ Indicates management contract or compensatory plan.

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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.

	Everbridge, Inc.
Date: November 8, 2019	By:	/s/ David Meredith
		David Meredith
		Chief Executive Officer
Date: November 8, 2019	By:	/s/ Patrick Brickley
		Patrick Brickley
		Senior Vice President and Chief Financial Officer

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EX-10.2

Exhibit 10.2

August 19, 2019

Vernon Irvin

Address

Address

Re:Terms ofEmployment

Dear Vernon:

This letter agreement (this “Agreement”) will set forth the terms of your “at-will” term employment relationship with Everbridge, Inc., and/or any present or future parent, subsidiary or affiliate thereof (collectively, the “Company”). This Agreement hereby supersedes any and all previous agreements relating to your employment relationship with the Company. The terms of yourpositionwiththeCompanyareassetforthbelowandwillbeeffectiveonlyupon,andsubject to, the signing of this Agreement and any other agreements or documentation requiredhereunder, by you and the Company as of the Commencement Date referenced below. Your new role shall commence on September 4, 2019 (the “Commencement Date”), unless you and the Company mutually agree on an alternativedate.

1.Employment.

(a)Title and Duties. Subject to the terms and conditions of this Agreement, the Company will employ you, and you will be employed by the Company, on an “at-will” basis, as Executive Vice President and Chief Revenue Officer and such additional or different position or positions as the Board of Directors of the Company (the “Board”) may determine in its sole discretion, reporting to David Meredith, Chief Executive Officer or his direct designate. You shall do and perform all services, acts or things necessary or advisable to manage and conduct the business of the Company and which are normally associated with your position, including but not limited to those described in Schedule 1attached hereto.

(b)Full Time Best Efforts. For so long as you are employed hereunder, you will devote substantially all of your business time and energies to the business and affairs of the Company, and shall at all times faithfully, industriously and to the best of your ability, experience and talent, perform all of your duties and responsibilities hereunder. In furtherance of, and not in limitation of the foregoing, during the term of this Agreement, you further agree that you shall not render commercial or professional services of any nature, including as a founder, advisor, or a member of a board of directors, to any person or organization, whether or not for compensation, if such services would materially interfere with your duties under this Agreement, without the prior approval of the Chief Executive Officer in his sole discretion; provided, however, that nothing contained in this Section 1(c) will be deemed to prevent or limit your right to (i) manage your personal investments on your own personal time or (ii) participate in religious, charitable or civic organizations in any capacity on your own personal time. As set forth above, your employment with the Company is “at-will,” and, accordingly, either you or the Company may terminate your employment at any time, with or without cause, for any reason or no reason.

(c)Location. Unless the parties hereto otherwise agree in writing, during the term of this Agreement, you shall perform the services required to be performed pursuant to this Agreement from your home office, provided that the Company will provide you with office space at the Company’s Burlington, Massachusetts office and you will be expected to spend significant time at that or other Company offices when not traveling on Company business. In addition, the Company expects that you will travel extensively to other locations to meet with customers, prospects, and partners in connection with the Company’s business.

2.Compensation. During the term of your employment with the Company, the Company will pay you the following compensation:

(a)Salary. As of the Commencement Date, you will be paid an annual salary of Three Hundred and Twenty-Five Thousand ($325,000.00), as may be increased from time to time as part of the Company’s normal salary review process (the “Salary”). The Salary shall be prorated for any partial year of employment on the basis of a 365-day year. Your Salary will be subject to standard payroll deductions and withholdings, and payable in accordance with the Company’s standard payroll practice as it exists from time to time.

(b)Expenses. During the term of your employment, the Company shall reimburse you for all reasonable and documented expenses incurred by you in the performance of your duties, under this Agreement in accordance with Company policy.

(c)Annual Performance Bonus.  You will be eligible to earn an annual performance bonus at the conclusion of each year of employment with the Company (the “Annual Bonus”).  The amount, award and timing of the payment of the Annual Bonus shall be set forth in a Company Management Incentive Plan, established each year by the Board, in its discretion.  The Company’s Management Incentive Plan for fiscal year 2019 is set forth on Schedule A attached hereto and for 2019, your target is two-hundred and thirty-five thousand dollars ($235,000).  The Annual Bonus payable for calendar year 2019 shall not be prorated based on your Commencement Date. Company Management Incentive Plans, if any, for subsequent years, shall be provided to you by the Chief Executive Officer.  For fiscal year 2020, your target will three-hundred and twenty-five thousand dollars ($325,000).

(d)Signing Bonus. You will be paid a signing bonus (the “Signing Bonus”) of Ninety Thousand Dollars ($90,000) within thirty (30) days of the execution of this Agreement. If you do not commence employment with the Company for any reason or you voluntarily terminate, which shall not include termination for Good Reason, your employment with the Company on or before twelve (12) months from the payment date, you will be responsible for promptly reimbursing the Company for the full amount of the Signing Bonus.  

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(e)Restricted Stock Units and Performance Stock Units.Upon approval by the Board of Directors of the Company, you will be granted 50,000 Restricted Stock Units (RSUs) and 50,000 Performance Stock Units (PSUs). The RSUs will vest over four years at 25% per year, starting on the first anniversary of the last day of the month in which the grant date occurs, provided that, there has not been a termination of Continuous Service (as defined in the Company’s 2016 Equity Incentive Plan) as of each such date. The PSUs will vest according to the PSU vesting schedule included as Exhibit A to this Offer Letter. In the event of a Change in Control (as defined in the 2016 Equity Incentive Plan), then the vesting of your RSUs and PSUs shall accelerate as follows: i) for the percentage of shares equal to the number of months of full-time employment as of the date of a change of control divided by forty eight (i.e., number of months of employment divided by 48), as well as, ii) the additional amount of 50% of all of your unvested (as of the date of a Change of Control after the acceleration granted in (i) above) RSUs and PSUs shall vest in full. In the event the acquirer or successor party does not assume or convert 100% of your remaining unvested shares after accelerated vesting in (i) and (ii) above as part of the Change of Control or does not offer equivalently valued new equity incentives to you, then 100% of your remaining unvested RSUs and PSUs will vest in full immediately prior to consummation of the Change of Control.

(f)Employee Benefits. As an employee of the Company, you will be eligible to participate in such Company-sponsored benefits and programs as are made generally available to other employees of the Company. This includes paying for your portion of healthcare coverage and same 401(k) match as other Company employees. You will receive the same cell phone stipend as other Everbridge executives. In addition, you will be entitled to (i) annually accrue vacation and/or sick time in accordance with the Company’s vacation policy as established by the Board and as in effect from time to time. The Company reserves the right to change or eliminate any benefit plans at any time, upon notice to you.

3.Separation Benefits. You shall be entitled to receive separation benefits upon termination of employment only as set forth in this Section 3; provided, however, that in the event you are entitled to any severance pay under a Company-sponsored severance pay plan, any such severance pay to which you are entitled under such severance pay plan shall reduce the amount of severance pay to which you are entitled pursuant to this Section 3. In all cases, upon termination of employment you will receive payment for all salary and unused vacation accrued as of the date of your termination of employment, and your benefits will be continued under the Company’s then existing benefit plans and policies in accordance with such plans and policies in effect on the date of termination and in accordance with applicable law. In furtherance of, and not in limitation of the foregoing, but without duplication, during the period wherein which you shall be receiving Separation Payments in accordance with the provisions of Section 3(d) hereof (the “Severance Period”), then the Company shall, at its election, either (i) continue to pay for your health benefits under the Company’s sponsored health care program in which you were enrolled and eligible to receive benefits prior to your termination of employment, or (ii) pay for your health coverage under the Consolidated Omnibus Budget Reconciliation Act (“COBRA”), in each case, for the Severance Period, when such premiums are due and owing.

(a)Voluntary Resignation. If you voluntarily elect to terminate your employment with the Company (other than under the circumstances described in Section 3(c) below), you shall not be entitled to any separation benefits.

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(b)Termination for Cause. If the Company or its successor terminates your employment for Cause (as defined below) then you shall not be entitled to receive any separation benefits.

(c)Termination for Death or Disability. If your employment with the Company is terminated by reason of death or disability, then, as a severance benefit, the Company shall continue to pay one-twelfth (1/12th) of your Salary for a period of three (3) months, in accordance with the Company’s normal payroll schedule and policy in effect from time to time. For purposes of this section, “Disability” shall mean your inability to perform your duties under this Agreement because you have become permanently disabled within the meaning of any policy of disability income insurance covering employees of the Company then in force. In the event the Company has no policy of disability income insurance covering employees of the Company in force when you become disabled, the term “Disability” shall mean your inability to perform your duties under this Agreement by reason of any incapacity, physical or mental, which the Board, based upon medical advice or an opinion provided by a licensed physician acceptable to the Board, determines to have incapacitated you from satisfactorily performing all of your usual services for the Company for a period of at least ninety (90) days during any twelve (12) month period (whether or not consecutive) and is expected to continue to incapacitate you thereafter, not including any time during which you were on medical leave required by federal or state law. Based upon such medical advice or opinion, the determination of the Board shall be final and binding and the date such determination is made shall be the date of such Disability for purposes of this Agreement.

(d)Involuntary Termination. Subject to the provisions of Section 5 hereof, if your employment is terminated by the Company other than for Cause then, as a severance benefit, the Company shall continue to pay you an amount equal to one-twelfth (1/12th) of your Salary for (A) six (6) months, if and to the extent that your employment is terminated within twelve (12) months following the Commencement Date; or (B) twelve (12) months, if and to the extent that your employment is terminated more than twelve (12) months following the Commencement Date.  In addition, if either your employment is terminated by the Company other than for Cause, or you voluntarily terminate your employment with the Company for Good Reason within twelve (12) months following the Commencement Date, one-third (1/3) of your total RSU and PSU grant will vest fully.

(e)Definition of “Cause”. For purposes of this Agreement, “Cause” shall mean any of the following: (i) acts of moral turpitude, fraud or dishonesty that involve the assets of the Company, its customers, suppliers or affiliates; (ii) the conviction of, or a pleading of guilty or nolo contendere to, a felony other than involving a traffic related infraction; (iii) use of narcotics, liquor or illicit drugs in a manner that has had a detrimental effect on the performance of your duties; (iv) willfully and repeatedly neglecting your duties to the Company; (v) engaging in any conduct which, after an investigation by a neutral third party, is determined to be discriminatory or harassing toward other Company employees; or (vi) engaging in any conduct which breaches a material provision of this Agreement or the Inventions Agreement (as defined below).

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(A)Cause shall only exist where the Company has provided you with written notice of the alleged problem or violation of this Agreement or the Inventions Agreement, and you shall have failed to cure such condition to the reasonable satisfaction of the Company within ten (10) business days. In making any determination that Cause exists, the Board shall act fairly and in good faith and shall give you an opportunity to appear and be heard at a meeting of the Board or any committee thereof and present evidence on your behalf. For any termination pursuant to (e)(i) or (e)(vi) of Section 3, the Company must have reasonable, specific evidence to establish that such conduct has occurred or “Cause” shall not exist. For the avoidance of doubt, and notwithstanding anything herein contained to the contrary, in the event that (x) any of the conditions specified in Section (e)(i) through (e)(vi) of Section 3 shall have occurred, and (y) the Company has reasonable evidence to establish that such conduct has occurred, and (z) the occurrence of any such event shall not be capable of cure, then the Company shall not be required to provide you any notice and a cure period in respect thereof.

4.Mitigation. You shall not be required to mitigate the amount of any payment or benefits provided for in this Agreement by seeking other employment or otherwise. Further, the amount of any payment or benefits provided for in this Agreement shall not be reduced by any compensation earned by you as a result of employment by another employer, by retirement benefits, by offset against any amount claimed to be owed by you to the Company or otherwise.

5.Conditions to Receipt of Severance or other Benefits Pursuant to this Agreement.

(a)Release of Claims Agreement. Notwithstanding anything herein contained to the contrary, the receipt of any severance or other benefits pursuant to Section 3(d) of this Agreement (the “Separation Payments”) is subject to your signing and not revoking a separation agreement and release of claims, based on the Company’s standard form release, of any and all claims you may have against the Company and its officers, employees, directors, parents and affiliates, in substantially the form attached hereto on Exhibit A (the “Release”), which must become effective and irrevocable no later than the sixtieth (60th) day following the termination of employment (the “Release Deadline”). If the Release does not become effective and irrevocable by the Release Deadline, you will forfeit any rights to Separation Payments or benefits under this Agreement. No Separation Payments and benefits under this Agreement will be paid or provided until the Release becomes effective and irrevocable, and any such Separation Payments and benefits otherwise payable between the date of your termination of employment and the date the Release becomes effective and irrevocable will be paid on the date the Release becomes effective and irrevocable.

(b)Continued Compliance with Agreements. Your receipt of any Separation Payments or other benefits pursuant to this Agreement will be subject to, and contingent upon, your not being in breach of this Agreement and / or the Inventions Agreement as of the date of your termination, and your continued compliance following the date of your termination with the terms of this Agreement, the Inventions Agreement and the Release, notwithstanding anything herein contained to the contrary.

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6.Confidential and Proprietary Information.

(a)Confidential Information and Inventions Agreement. As a condition to the execution and effectiveness of this Agreement, you agree to abide by, the Company’s Confidential Information and Inventions Agreement which you previously executed (the “Inventions Agreement”). In furtherance, and not in limitation of the provisions thereof, you agree, during the term hereof and thereafter, that you shall take all steps reasonably necessary to hold the Company’s proprietary information in trust and confidence, will not use proprietary information in any manner or for any purpose except in connection with the performance of your services to the Company, and will not (other than in the performance of the services to the Company as herein contemplated) disclose any such proprietary information to any third party without first obtaining the Company’s express written consent on a case-by-case basis.

(b)Third Party Information. You understand that the Company has received, and will in the future receive, from third parties confidential or proprietary information (“Third Party Information”) subject to a duty on the Company’s part to maintain the confidentiality of such information and use it only for certain limited purposes. You agree to hold Third Party Information in confidence and not to disclose to anyone (other than the Company’s personnel who need to know such information in connection with their work for the Company) or to use, except in connection with the performance of your services to the Company, Third Party Information unless expressly authorized in writing by an officer of the Company.

(c)Whistleblower Exception. Notwithstanding any provision of this Agreement to the contrary, including but not limited to this Section 6, you may report possible violations of federal law or regulation to any governmental agency or entity, including but not limited to the Department of Justice, the Securities and Exchange Commission, and any agency Inspector General, or make other disclosures that are protected under the whistleblower provisions of federal law or regulation. You do not need the prior authorization from the Company to make any such reports or disclosures and you are not required to notify the Company that you have made such reports or disclosures.

7.Covenant Not to Compete. During the longer of (a) a period of two years beginning on the Commencement Date, or (b) the duration of your employment with the Company plus two years following the termination thereof, you shall not, directly or indirectly (whether as an employer, operator, agent, independent contractor, consultant, owner, director, officer, shareholder, investor, partner (general or limited), joint venturer or any other relationship or relationships similar to any of the foregoing), anywhere in the world, except as specifically provided in this Section 7 below:

(a)Restriction on Competitive Activities.  Engage in any activities, perform any services or conduct, have an interest in or participate in any businesses that are competitive with any part of the business of the Company as currently conducted or as currently contemplated to be conducted (the “Business”), including without limitation, develop, create, license, sell, distribute or otherwise commercially exploit any product, service or methodology that has the same principal function or features as the Company’s proprietary software products and related services that constitute the Business.

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(b)No Solicitation of Customers.  Solicit or divert away or attempt to solicit or divert away any customer of the Company in an effort to provide products or services to such customer which are competitive with the Business.

(c)Restrictions on Relationships Involving Competitive Activities.  Be engaged by, employed by, consult with, own any capital stock of, or have any financial interest of any kind in, any individual, person or entity, which conducts a business that is competitive with any part of the Business. Notwithstanding the preceding sentence, you may own, for investment purposes only, up to 1% in the aggregate of the outstanding stock or other equity interest of any entity that is competitive with the Business.

8.Covenant Not to Solicit. During the longer of (a) a period of one year beginning on the Commencement Date, or (b) the duration of your employment with the Company plus one year following the termination thereof, you shall not, directly or indirectly (whether as an employer, operator, agent, independent contractor, consultant, owner, director, officer, shareholder, investor, partner (general or limited), joint venturer or any other relationship or relationships similar to any of the foregoing), anywhere in the world, except as specifically provided in this Section 8 below:

(a)Restrictions on Relationships Involving Solicitation.  Cause, induce, solicit, recruit, hire or encourage or attempt to cause, induce, solicit, recruit, hire or encourage any person or entity that prior to the date hereof was an employee, subcontractor, contractor, agent, distributor, licensee, licensor or supplier of the Company to terminate, or otherwise change in any manner adverse to the Company or any of its affiliates, its relationship with the Company, or, hire or attempt to hire any person employed by the Company or any of its affiliates, provided that you may hire such employee if such employee’s employment with the Company or any of its affiliates has been terminated involuntarily prior to date of hire by you.

9.Arbitration.

(a)Agreement to Arbitrate. Except as provided for any action arising out of any violation of the Inventions Agreement or as set forth in clause (b) below addressing excluded claims and remedies, you and the Company both agree that any disputes of any kind whatsoever arising out of or relating to the termination of your employment with the Company, including any breach of this Agreement, shall be subject to final and binding arbitration.

(b)Excluded Claims, Relief and Enforcement. You understand that this Agreement does not prohibit you from pursuing an administrative claim with a local, state, or federal administrative body such as the Department of Fair Employment and Housing, the Equal Employment Opportunity Commission, the National Labor Relations Board, or the Workers’ Compensation Board, or the Department of Unemployment Assistance for unemployment benefits. This Agreement does not preclude the Company from pursuing court action regarding any claims arising out of any breach of the Inventions Agreement or other claims not otherwise resulting from, or arising out of, the termination of your employment with the Company. Nothing in this Agreement prohibits either party from seeking injunctive or declaratory relief from a court of competent jurisdiction. Either the Company or you may bring an action in court to compel arbitration under this Agreement and to enforce an arbitration award. Otherwise, with the exception of claims set forth in

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this clause or arising out of the Inventions Agreement, neither party shall initiate or prosecute any lawsuit or claim in anyway related to any arbitrable claim, including without limitation any claims as to the making, existence, validity, or enforceability of the agreement to arbitrate.

(c)Procedure. You agree that any arbitration will be administered by Judicial Arbitration & Mediation Services, Inc. (“JAMS”), pursuant to its employment arbitration rules and procedures (the “JAMS Rules”), which are available at www.jamsadr.com/rules-employment-arbitration. A neutral and impartial arbitrator shall have the power to decide any motions brought by any party to the arbitration, including motions for summary judgment and/or adjudication, motions to dismiss and demurrers, and motions related to discovery, prior to any arbitration hearing. You also agree that the arbitrator shall have the power to award any remedies available under applicable law. In the event that either party to this Agreement rejects a written offer to compromise from the other party, and fails to obtain a more favorable judgment or award, the arbitrator may award attorneys’ fees and costs to the party that made the offer to compromise in an amount that the arbitrator deems appropriate, taking into consideration the attorneys’ fees and costs (including expert fees) actually incurred and reasonably necessary to defend or prosecute the action. The arbitrator will not have the authority to disregard or refuse to enforce any lawful Company policy, and the arbitrator shall not order or require the Company to adopt a policy not otherwise required by law. You understand that the Company will pay the costs and fees of the arbitration that you initiate, but only those fees over and above the costs you would have incurred had you filed a complaint in a court of law. You agree that the arbitrator shall prepare a written decision containing the essential findings and conclusions on which the award is based. You agree that any arbitration under this Agreement shall be conducted in Denver, Colorado.

(d)Exclusive and Final Remedy. Except as provided by the JAMS Rules and this Agreement, arbitration shall be the sole, exclusive and final remedy for any dispute between you and the Company. Accordingly, except as provided for by the JAMS Rules and this Agreement, neither you nor the Company will be permitted to pursue court action regarding claims that are subject to arbitration. Nothing in this Agreement or in this provision is intended to waive the provisional relief remedies available under the JAMS Rules.

(e)Prohibition of Group Actions. Claims must be brought in your individual capacity, not as a representative or class member in any purported class or representative proceeding. The arbitrator shall not consolidate claims of different employees into one proceeding, nor shall the arbitrator have the power to hear arbitration as a class action.

(f)Voluntary Nature of Agreement. You acknowledge and agree that you are executing this Agreement voluntarily and without any duress or undue influence by the Company or anyone else. You further acknowledge and agree that you have carefully read this Agreement and have asked any questions needed for you to understand the terms, consequences, and binding effect of this Agreement and fully understand it, including that you are waiving your right to a jury trial. Finally, you acknowledge that you have been advised by the Company to seek the advice of an attorney of your choice before signing this Agreement and you agree that you have been provided such an opportunity.

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10.General.

(a)Entire Agreement, Amendment and Waiver. This Agreement, together with the other agreements specifically referred to herein, embodies the entire agreement and understanding between the parties hereto with respect to the subject matter hereof and supersedes all prior oral or written agreements and understandings relating to the subject matter hereof, including but not limited to the offer letter between you and the Company dated May 30, 2012. The terms and provisions of this Agreement may be modified or amended only y written agreement executed by the parties hereto. The terms and provisions of this Agreement may be waived, or consent for the departure therefrom granted, only by written document executed by the party entitled to the benefits of such terms or provisions. Each such waiver or consent will be effective only in the specific instance and for the purpose for which it was given, and will not constitute a continuing waiver or consent.

(b)Notices. Any notice, request, instruction or other document required or permitted hereunder shall be in writing and shall be deemed effectively given: (a) upon personal delivery to the party to be notified; (b) three (3) days after having been sent by registered or certified mail, return receipt requested, postage prepaid; or (c) one (1) business day after deposit with a nationally recognized overnight courier, specifying next day delivery, with written verification of receipt. All communications shall be sent to the party to be notified at the following address of such party or at such other address as such party may designate by ten (10) days advance written notice to the other parties hereto in accordance with the provisions hereof:

If totheCompany:	Everbridge,Inc.
	25 CorporateDrive
	Burlington, MA  01803
	Attention: Chief Executive Officer
with acopyto:	Everbridge, Inc.
	25 Corporate Drive
	Burlington, MA 01803 Attention:  General Counsel
Iftoyou:	Vernon Irvin
	Address
	Address

(c)Availability of Injunctive Relief. The parties hereto agree that, notwithstanding anything to the contrary herein contained, any party may petition a court for injunctive relief where either party alleges or claims a violation of this Agreement or the Inventions Agreement or any other agreement regarding trade secrets, confidential information, noncompetition, non-solicitation or assignment of inventions. In the event either party seeks injunctive relief, the prevailing party shall be entitled to recover reasonable costs and attorney’s fees.

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(d)Assignment. The Company may assign its rights and obligations hereunder to any person or entity that succeeds to all or substantially all of the Company’s business or that aspect of the Company’s business in which you are principally involved. You may not assign your rights and obligations under this Agreement without the prior written consent of the Company.

(e)Governing Law. This Agreement, and the rights and obligations of the parties hereunder, will be construed in accordance with and governed by the law of the State of Colorado, without giving effect to the conflict of law principles thereof.

(f)Taxes. All payments to you under this Agreement shall be subject to all applicable federal, state and local withholding, payroll and other taxes.

(g)Severability. The finding by an arbitrator or a court of competent jurisdiction of the unenforceability, invalidity or illegality of any provision of this Agreement shall not render any other provision of this Agreement unenforceable, invalid or illegal. Such arbitrator or court shall have the authority to modify or replace the invalid or unenforceable term or provision with a valid and enforceable term or provision which most accurately represents the parties’ intention with respect to the invalid or unenforceable term or provision. If moreover, any one or more of the provisions contained in this Agreement will for any reason be held to be excessively broad as to duration, geographic scope, activity or subject, it will be construed by limiting and reducing it, so as to be enforceable to the extent compatible with the applicable law as it will then appear.

(h)Interpretation; Construction. The headings set forth in this Agreement are for convenience of reference only and shall not be used in interpreting this Agreement. This Agreement has been drafted by legal counsel to the Company, but you have been encouraged to consult with, and have consulted with, your own independent counsel and tax advisors with respect to the terms of this Agreement. The parties acknowledge that each party and its counsel has reviewed and revised, or had an opportunity to review and revise, this Agreement, and the normal rule of construction to the effect that any ambiguities are to be resolved against the drafting party shall not be employed in the interpretation of this Agreement.

(i)Return of Company Property. Upon termination of this Agreement or earlier as requested by the Company, you shall deliver to the Company any and all equipment, and, at the election of the Company, either deliver or destroy, and certify thereto, any and all drawings, notes, memoranda, specifications, devices, formulas and documents, together with all copies, extracts and summaries thereof, and any other material containing or disclosing any Third Party Information or Proprietary Information (as defined in the Inventions Agreement) of the Company.

(j)Survival. The provisions of Sections 3, 5, 6, 7, 8 and 9, and the provisions of the Inventions Agreement, shall survive termination of this Agreement.

(k)Representations and Warranties. By signing this Agreement, you represent and warrant that (i) you are not restricted or prohibited, contractually or otherwise, from entering into and performing each of the terms and covenants contained in this Agreement, and (ii) your execution and performance of this Agreement shall not violate or breach any other agreements between you and any other person or entity, and (iii) you have provided the Company with copies of any written agreements presently in effect between you and any current or former employer. You

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further represent and warrant that you will not, during the term hereof, enter into any oral or written agreement in conflict with any of the provisions of this Agreement, the agreements referenced herein and the Company’s policies.

(l)Confirmation of Employment Status. Prior to your first day of employment with the Company, and as a condition to such employment, you shall provide the Company with documentation of your eligibility to work in the United States, as required by the Immigration and Reform and Control Act of 1986.

(m)Trade Secrets of Others. It is the understanding of both the Company and you that you shall not divulge to the Company and/or its subsidiaries any confidential information or trade secrets belonging to others, including your former employers, nor shall the Company seek to elicit from you any such information. Consistent with the foregoing, you shall not provide to the Company and/or its affiliates, and the Company and/or its affiliates shall not request, any documents or copies of documents containing such information.

(n)Telecopy Execution and Delivery. A facsimile, telecopy or other reproduction of this Agreement may be executed by one or more parties hereto and delivered by such party by facsimile or any similar electronic transmission device pursuant to which the signature of or on behalf of such party can be seen. Such execution and delivery shall be considered valid, binding and effective for all purposes. At the request of any party hereto, all parties hereto agree to execute and deliver an original of this Agreement as well as any facsimile, telecopy or other reproduction hereof.

(o)Counterparts. This Agreement may be executed in two counterparts, each of which shall be deemed an original, all of which together shall constitute one and the same instrument.

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EVERBRIDGE, INC.

Executive Employment Agreement -- Counterpart Signature Page

If the foregoing accurately sets forth our agreement, please so indicate by signing and returning to us the enclosed copy of this letter.

Very trulyyours,
EVERBRIDGE,INC.
By:	/s/ David Meredith
Name:	David Meredith
Title:	CEO
Date:	August 30, 2019

ACCEPTED AND AGREED TOBY:

/s/ Vernon Irvin

Vernon Irvin

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Schedule 1

Duties and Responsibilities

The CRO will work closely with our CEO to provide the leadership, management, and vision necessary to ensure that the organization has the procedures and people systems in place to effectively grow the organization. The CRO will lead our global sales efforts including planning and execution to ensure the successful performance of the business.

The specific duties and responsibilities shall include:

• partner with the CEO to develop an execution plan to deliver the Corporate Growth Strategy,

• promote a culture of high performance and continuous improvement that values meeting aggressive goals with a commitment to quality,

• motivate and lead a high-performance team; attract, recruit and retain top talent and provide mentoring,

• continuously refine the comprehensive go to market plan across multiple channels and market segments,

• develop and deploy strategic sales plans,

• promote sales growth and customer satisfaction for the organization,

• grow the business by partnering and mentoring with the Senior Management Team to grow the business profitably,  

• represent Everbridge with clients and business partners as appropriate,

• demonstrate exceptional leadership qualities, strategic thinking and decision making, while possessing strong business acumen and staying results focused,

• influence a wide range of audiences; present and defend complicated or sensitive issues that have an important impact on the business, and

• actively shape the culture and lead the team to rally around our vision & mission; consistently promoting and exhibiting behavior within our core values.

Exhibit A

Vesting Schedule

At the end of the fiscal quarter ended immediately after the second anniversary of the Grant Date (the “First Measurement Date”), up to sixty-two and one-half percent (62.5%) of the Shares subject to this Award will become eligible to vest based on the compound annual growth rate (the “CAGR”) achieved during the eight fiscal quarters preceding the most recent fiscal quarter. At the end of the fiscal quarter ended immediately after the third anniversary of the Grant Date (the “Second Measurement Date”), up to an additional sixty-two and one-half percent (62.5%) of the Shares subject to this Award will become eligible to vest based on the CAGR achieved during the twelve fiscal quarters preceding the most recent fiscal quarter. In each case, the CAGR shall be determined based on the Company’s consolidated revenue during each such quarter, as reported in the Company’s consolidated financial statements. Any such vesting will take place on the date that the Company files its Form 10-Q or Form 10-K for the applicable Measurement Date. The number of shares vested as of either measurement date shall be determined with reference to the following table:

REVENUE GROWTH	PSU VESTING		LINEAR INTERPOLATION VESTING
<20%		0%	No linear interpolation vesting
20% to 25%		5% to 12.5%	1.5% increased vesting for every 1% above 20%
25% to 30%		12.5% to 25%	2.5% increased vesting for every 1% above 25%
30% to 35%		25% to 50%	5% increased vesting for every 1% above 30%
40%		62.5%	Cliff vesting of added 12.5% of PSUs (no linear vesting)

For the avoidance of doubt, only up to 62.5% of the Shares may vest on either the First Measurement Date or the Second Measurement Date. The PSUs shall expire with respect to any Shares not vested as of the Second Measurement Date.

Exhibit B

Form of Release Agreement

This Release Agreement (“Release” or “Agreement”) is made by and between _______________________

(“you”)and Everbridge, Inc.  (the “Company”).  A copy of this Release is an attachment to the Employment Agreement between the Company and you dated __________ _____, 20__ (the “Employment Agreement”). Capitalized terms not defined in this Agreement carry the definition found in the Employment Agreement.

1.Separation Payments. In consideration for your execution, return and non-revocation of this Release on or after the date your employment is terminated (the “Separation Date”), the Company will provide you with the Separation Payments described in Section 3(d) of the Employment Agreement:

2.Compliance with Section 409A. The Separation Payments offered to you by the Company are payable in reliance on Treasury Regulation Section 1.409A-1(b)(9) and the short term deferral exemption in Treasury Regulation Section 1.409A-1(b)(4).  For purposes of Code Section 409A, your right to receive any installment payments (whether pay in lieu of notice, Separation Payments, reimbursements or otherwise) shall be treated as a right to receive a series of separate payments and, accordingly, each installment payment shall at all times be considered a separate and distinct payment.  All payments and benefits are subject to applicable withholdings and deductions.

3.Release.  In exchange for the Separation Payments and other consideration, to which you would not otherwise be entitled, and except as otherwise set forth in this Agreement, you, on behalf of yourself and, to the extent permitted by law, on behalf of your spouse, heirs, executors, administrators, assigns, insurers, attorneys and other persons or entities, acting or purporting to act on your behalf (collectively, the “Employee Parties”), hereby generally and completely release, acquit and forever discharge the Company, its parents and subsidiaries, and its and their officers, directors, managers, partners, agents, representatives, employees, attorneys, shareholders, predecessors, successors, assigns, insurers and affiliates (the “Company Parties”) of and from any and all claims, liabilities, demands, contentions, actions, causes of action, suits, costs, expenses, attorneys’ fees, damages, indemnities, debts, judgments, levies, executions and obligations of every kind and nature, in law, equity, or otherwise, both known and unknown, suspected and unsuspected, disclosed and undisclosed, arising out of or in any way related to agreements, events, acts or conduct at any time prior to and including the execution date of this Agreement, including but not limited to:  all such claims and demands directly or indirectly arising out of or in any way connected with your employment with the Company or the termination of that employment; claims or demands related to salary, bonuses, commissions, stock, stock options, or any other ownership interests in the Company, vacation pay, fringe benefits, expense reimbursements, severance pay, or any other form of compensation; claims pursuant to any federal, state or local law, statute, or cause of action; tort law; or contract law (individually a “Claim” and collectively “Claims”).  The Claims you are releasing and waiving in this Agreement include, but are not limited to, any and all Claims that any of the Company Parties:

• has violated its personnel policies, handbooks, contracts of employment, or covenants of good faith and fair dealing;

• has discriminated against you on the basis of age, race, color, sex (including sexual harassment), national origin, ancestry, disability, religion, sexual orientation, marital status, parental status, source of income, entitlement to benefits, any union activities or other protected category in violation of any local, state or federal law, constitution, ordinance, or regulation, including but not limited to: the Age Discrimination in Employment Act, as amended (“ADEA”); Title VII of the Civil Rights Act of 1964, as amended; the Civil Rights Act of 1991; 42 U.S.C. § 1981, as amended; the Equal Pay Act; the Americans With Disabilities Act; the Genetic Information Nondiscrimination Act; the Family and Medical Leave Act; the Elliott-Larsen Civil Rights Act, the Colorado Anti-Discrimination Act; the Colorado Labor Relations Act; the Employee Retirement Income Security Act; the Employee Polygraph Protection Act; the Worker Adjustment and Retraining Notification Act; the Older Workers Benefit Protection Act; the anti-retaliation provisions of the Sarbanes-Oxley Act, or any other federal or state law regarding whistleblower retaliation; the Lilly Ledbetter Fair Pay Act; the Uniformed Services Employment and Reemployment Rights Act; the Fair Credit Reporting Act; and the National Labor Relations Act; and

• has violated any statute, public policy or common law (including, but not limited to, Claims for retaliatory discharge; negligent hiring, retention or supervision; defamation; intentional or negligent infliction of emotional distress and/or mental anguish; intentional interference with contract; negligence; detrimental reliance; loss of consortium to you or any member of your family and/or promissory estoppel).

Notwithstanding the foregoing, other than events expressly contemplated by this Agreement you do not waive or release rights or Claims that may arise from events that occur after the date this Release is executed. Also excluded from this Agreement are any Claims which cannot be waived by law, including, without limitation, any rights you may have under applicable workers’ compensation laws.  Nothing in this Agreement shall prevent you from filing, cooperating with, or participating in any proceeding or investigation before the Equal Employment Opportunity Commission, United States Department of Labor, the National Labor Relations Board, the Occupational Safety and Health Administration, the Securities and Exchange Commission or any other federal government agency, or similar state or local agency (“Government Agencies”), or exercising any rights pursuant to Section 7 of the National Labor Relations Act.  You further understand this Agreement does not limit your ability to voluntarily communicate with any Government Agencies or otherwise participate in any investigation or proceeding that may be conducted by any Government Agency, including providing documents or other information, without notice to the Company.  While this Agreement does not limit your right to receive an award for information provided to the Securities and Exchange Commission, you understand and agree that, you are otherwise waiving, to the fullest extent permitted by law, any and all rights you may have to individual relief based on any Claims that you have released and any rights you have waived by signing this Agreement.  If any Claim is not subject to release, to the extent permitted by law, you waive any right or ability to be a class or collective action representative or to otherwise participate in any putative or certified class, collective or multi-party action or proceeding based on such a Claim in which any of the Company Parties is a party.  This Agreement does not abrogate your existing rights under any Company benefit plan or any plan or agreement related to equity ownership in the Company; however, it does waive, release and forever discharge Claims existing as of the date you execute this Agreement pursuant to any such plan or agreement.

4.Your Acknowledgments and Affirmations. You also acknowledge and agree that (i) the consideration given to you in exchange for the waiver and release in this Agreement is in addition to anything of value to which you were already entitled, and (ii) that you have been paid for all time worked, have received all the leave, leaves of absence and leave benefits and protections for which you are eligible, and have not suffered any on-the-job injury for which you have not already filed a Claim. You affirm that all of the decisions of the Company Parties regarding your pay and benefits through the date of your execution of this Agreement were not discriminatory based on age, disability, race, color, sex, religion, national origin or any other classification protected by law.  You affirm that you have not filed or caused to be filed, and are not presently a party to, a Claim against any of the Company Parties.  You further affirm that you have no known workplace injuries or occupational diseases.  You acknowledge and affirm that you have not been retaliated against for reporting any allegation of corporate fraud or other wrongdoing by any of the Company Parties, or for exercising any rights protected by law, including any rights protected by the Fair Labor Standards Act, the Family Medical Leave Act or any related statute or local leave or disability accommodation laws, or any applicable state workers’ compensation law.

In addition, you acknowledge that you are knowingly and voluntarily waiving and releasing any rights you may have under the ADEA (“ADEA Waiver”).  You also acknowledge that the consideration given for the ADEA Waiver is in addition to anything of value to which you were already entitled.  You further acknowledge that you have been advised by this writing, as required by the ADEA, that:  (a) your release and waiver herein does not apply to any rights or claims that arise after the date you sign this Agreement; (b) you should consult with an attorney prior to signing this Agreement; (c) you have twenty-one (21) days to consider this Agreement (although you may choose to voluntarily sign it sooner); (d) you have seven (7) days following the date you sign this Agreement to revoke it (by sending written revocation directly to the Company’s [title]); and (e) the Agreement will not be effective until the date upon which the revocation period has expired unexercised, which will be the eighth day after you sign this Agreement.

5.Return of Company Property.  By the Separation Date, you agree to return to the Company all Company documents (and all copies thereof) and other Company property that you have had in your possession at any time, including, but not limited to, Company files, notes, drawings, records, business plans and forecasts, financial information, specifications, computer-recorded information, tangible property (including, but not limited to, computers), credit cards, entry cards, identification badges and keys; and, any materials of any kind that contain or embody any proprietary or confidential information of the Company (and all reproductions thereof).  Please coordinate return of Company property with [name/title].  Receipt of the Separation Payments described in Section  1 of this Agreement is expressly conditioned upon return of all Company property.

6.Confidential Information, Non-Competition and Non-Solicitation Obligations.  Both during and after your employment you acknowledge your continuing obligations under your Confidential Information and Inventions Agreement not to use or disclose any confidential or proprietary information of the Company and comply with your post-employment non-competition and non-solicitation restrictions.    The Company acknowledges that you will not be held criminally or civilly liable under any federal or state trade secret law for the disclosure of a trade secret that: (A) is made (i) in confidence to a federal, state, or local government official, either directly or indirectly, or to an attorney and (ii) solely for the purpose of reporting or investigating a suspected violation of law; or (B) is made in a complaint or other document filed in a lawsuit or other proceeding, if such filing is made under seal.  In addition, in the event that you file a lawsuit for retaliation by the Company for reporting a suspected violation of law, you may disclose the trade secret to your attorney and use the trade secret information in the court proceeding, if you: (A) file any document containing the trade secret under seal; and (B) do not disclose the trade secret, except pursuant to court order.  

7.Confidentiality.  The provisions of this Agreement will be held in strictest confidence by you and will not be publicized or disclosed in any manner whatsoever; provided, however, that:  (a) you may disclose this Agreement to your immediate family; (b) you may disclose this Agreement in confidence to your attorney, accountant, auditor, tax preparer, and financial advisor; and (c) you may disclose this Agreement insofar as such disclosure may be required by law.  Notwithstanding the foregoing, nothing in this Agreement shall limit your right to discuss your employment with the Equal Employment Opportunity Commission, United States Department of Labor, the National Labor Relations Board, other federal government agency or similar state or local agency or to discuss the terms and conditions of your employment with others to the extent expressly permitted by Section 7 of the National Labor Relations Act.

8.Non-Disparagement.  You agree not to disparage the Company, and the Company’s attorneys, directors, managers, partners, employees, agents and affiliates, in any manner likely to be harmful to them or their business, business reputation or personal reputation; provided that you will respond accurately and fully to any question, inquiry or request for information when required by legal process.  Notwithstanding the foregoing, nothing in this Agreement shall limit your right to voluntarily communicate with the Equal Employment Opportunity Commission, United States Department of Labor, the National Labor Relations Board, other federal government agency or similar state or local agency or to discuss the terms and conditions of your employment with others to the extent expressly permitted by Section 7 of the National Labor Relations Act.

9.No Admission.  This Agreement does not constitute an admission by the Company of any wrongful action or violation of any federal, state, or local statute, or common law rights, including those relating to the provisions of any law or statute concerning employment actions, or of any other possible or claimed violation of law or rights.

10.Breach. You agree that upon any breach of this Agreement you will forfeit all amounts paid or owing to you under this Agreement.  Further, you acknowledge that it may be impossible to assess the damages caused by your violation of the terms of Sections 5, 6, 7 and 8 of this Agreement and further agree that any threatened or actual violation or breach of those Sections of this Agreement will constitute immediate and irreparable injury to the Company.  You therefore agree that any such breach of this Agreement is a material breach of this Agreement, and, in addition to any and all other damages and remedies available to the Company upon your breach of this Agreement, the Company shall be entitled to an injunction to prevent you from violating or breaching this Agreement.  You agree that if the Company is successful in whole or part in any legal or equitable action against you under this Agreement, you agree to pay all of the costs, including reasonable attorneys’ fees, incurred by the Company in enforcing the terms of this Agreement.

11.Miscellaneous.  This Agreement constitutes the complete, final and exclusive embodiment of the entire agreement between you and the Company with regard to this subject matter.  It is entered into without reliance on any promise or representation, written or oral, other than those expressly contained herein, and it supersedes any other such promises, warranties or representations.  This Agreement may not be modified or amended except in a writing signed by both you and a duly authorized officer of the Company.  This Agreement will bind the heirs, personal representatives, successors and assigns of both you and the Company, and inure to the benefit of both you and the Company, their heirs, successors and assigns.  If any provision of this Agreement is determined to be invalid or unenforceable, in whole or in part, this determination will not affect any other provision of this Agreement and the provision in question will be modified by the court so as to be rendered enforceable.  This Agreement will be deemed to have been entered into and will be construed and enforced in accordance with the laws of the State of Colorado as applied to contracts made and to be performed entirely within Colorado.

Everbridge, Inc.
By:
	[insert]
	[insert]

EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, David Meredith, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Everbridge, 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(s) 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)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) 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) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) 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

(d) 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(s) 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: November 8, 2019	By:	/s/ David Meredith
		Name: David Meredith
		Title: Chief Executive Officer (Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, Patrick Brickley, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Everbridge, 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(s) 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)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) 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) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) 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

(d) 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(s) 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: November 8, 2019	By:	/s/ Patrick Brickley
		Name: Patrick Brickley
		Title: Senior Vice President and Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION

Pursuant to the requirement set forth in Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended, (the “Exchange Act”) and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. §1350), I, David Meredith, Chief Executive Officer of Everbridge, Inc., do hereby certify that, to the best of my knowledge, the Quarterly Report on Form 10-Q of Everbridge, Inc. for the quarter ended September 30, 2019 (the “Report”):

(1) fully complies with the requirements of Section 13(a) or Section 15(d) of the Exchange Act; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of Everbridge, Inc. for the period presented herein.

Date: November 8, 2019	By:	/s/ David Meredith
		Name: David Meredith
		Title: Chief Executive Officer

This certification accompanies the Form 10-Q to which it relates, is not deemed filed with the Securities and Exchange Commission and is not to be incorporated by reference into any filing of Everbridge, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended (whether made before or after the date of the Form 10-Q), irrespective of any general incorporation language contained in such filing.

EX-32.2

Exhibit 32.2

CERTIFICATION

Pursuant to the requirement set forth in Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended, (the “Exchange Act”) and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. §1350), I, Patrick Brickley, Senior Vice President and Chief Financial Officer of Everbridge, Inc., do hereby certify that, to the best of my knowledge, the Quarterly Report on Form 10-Q of Everbridge, Inc. for the quarter ended September 30, 2019 (the “Report”):

(1) fully complies with the requirements of Section 13(a) or Section 15(d) of the Exchange Act; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of Everbridge, Inc. for the period presented herein.

Date: November 8, 2019	By:	/s/ Patrick Brickley
		Name: Patrick Brickley
		Title: Senior Vice President and Chief Financial Officer

This certification accompanies the Form 10-Q to which it relates, is not deemed filed with the Securities and Exchange Commission and is not to be incorporated by reference into any filing of Everbridge, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended (whether made before or after the date of the Form 10-Q), irrespective of any general incorporation language contained in such filing.

XML

Capitalized Software Development Costs, Net - Summary of Capitalized Software Development Costs, Net (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Capitalized Computer Software Net [Line Items]
Gross carrying amount	$ 47,820	$ 45,677
Accumulated amortization	(33,728)	(32,784)
Net carrying amount	14,092	12,893
Capitalized Software Development Costs
Capitalized Computer Software Net [Line Items]
Gross carrying amount	$ 47,820	$ 45,677
Amortization period	3 years	3 years
Accumulated amortization	$ (33,728)	$ (32,784)
Net carrying amount	$ 14,092	$ 12,893

XML

Accounts Receivable, Net - Schedule of Changes in Sales Reserve (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accounts Receivable Net [Abstract]
Balance, beginning of period	$ (195)	$ (209)	$ (200)	$ (100)
Additions				(133)
Write-offs	4	69	9	93
Balance, end of period	$ (191)	$ (140)	$ (191)	$ (140)

XML

Leases - Schedule of Components of Lease Expense (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Lease Cost [Abstract]
Operating lease expense		$ 1,069		$ 2,802
Short-term lease expense	[1]	138		690
Total		1,207	$ 900	3,492	$ 2,600
Less: Sublease income		(33)		(45)
Total lease expense		$ 1,174		$ 3,447

[1] Short-term lease expense includes all leases with lease terms ranging from less than one month to one year.

XML

Convertible Senior Notes - Schedule of Components of Convertible Senior Notes (Parenthetical) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)
Debt Disclosure [Abstract]
Transaction costs in equity	$ 0.8

XML

Stockholders' Equity - Additional Information (Details) - $ / shares	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Equity [Abstract]
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares outstanding	0	0
Common stock, shares authorized	100,000,000	100,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, voting rights	Holders of common stock are entitled to one vote per share
Common stock, shares issued	33,778,616	29,700,192
Common stock, shares outstanding	33,778,616	29,700,192

XML

Stock Plans and Stock-Based Compensation - Schedule of Assumptions Used in Determining Fair Value of Stock Option Grants (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend rate			0.00%
2016 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	6 months	6 months	6 months	6 months
Expected volatility	45.00%		45.00%
Expected volatility, maximum		50.00%		60.00%
Expected volatility, minimum		45.00%		45.00%
Risk-free interest rate, maximum	2.52%	2.33%	2.52%	2.33%
Risk-free interest rate, minimum	1.93%	1.89%	1.93%	1.18%
Dividend rate	0.00%	0.00%	0.00%	0.00%
Employee Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value per share on grant date		$ 58.75
Expected term (in years)		6 years		6 years
Expected volatility		45.00%
Expected volatility, maximum				50.00%
Expected volatility, minimum				45.00%
Risk-free interest rate		2.72%
Risk-free interest rate, maximum				2.98%
Risk-free interest rate, minimum				2.72%
Dividend rate		0.00%		0.00%
Employee Stock Options | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value per share on grant date				$ 33.06
Employee Stock Options | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value per share on grant date				$ 58.75

XML

Leases

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

Leases

(16) Leases

The Company’s leases relate primarily to office facilities that expire on various dates from 2019 through 2027. The terms of the Company's non-cancelable operating lease arrangements typically contain fixed lease payment which increases over the term of the lease at fixed rates, rent holidays and provide for additional renewal periods. Lease expense is recognized over the term of the lease on a straight-line basis. All of the Company’s leases are classified as operating leases. The Company has determined that periods covered by options to extend the Company’s leases are excluded from the lease term as the Company is not reasonably certain the Company will exercise such options. Operating lease expense, including expenses related to short-term leases, were $1.2 million and $0.9 million for the three months ended September 30, 2019 and 2018, respectively, and $3.5 million and $2.6 million for the nine months ended September 30, 2019 and 2018, respectively.

The Company records its ROU Assets within other assets (long term) and its operating lease liabilities within other current and long-term liabilities.

Additional information related to the Company’s leases as of and for the nine months ended September 30, 2019, is as follows (in thousands, except lease term and discount rate):

	September 30, 2019
Balance sheet information
ROU assets	$	13,824
Lease liabilities, current	$	3,514
Lease liabilities, non-current		12,714
Total lease liabilities	$	16,228
Supplemental data
Weighted average remaining lease term	4.33 years
Weighted average discount rate		7.00	%
Cash paid for amounts included in lease liabilities	$	2,648
ROU assets obtained in exchange for lease obligations	$	17,726

Maturities of lease liabilities as of September 30, 2019 were as follows (in thousands):

Year ending December 31,
2019 (for the remaining three months)	$	1,160
2020		4,487
2021		4,341
2022		4,044
2023		3,929
Thereafter		2,023
Total undiscounted lease payments		19,984
Less: imputed interest		(3,756	)
Total lease liabilities	$	16,228

The following table presents components of lease expense for the three and nine months ended September 30, 2019 (in thousands):

	Three Months Ended			Nine Months Ended
	September 30, 2019			September 30, 2019
Operating lease expense	$	1,069		$	2,802
Short-term lease expense(1)		138			690
		1,207			3,492
Less: Sublease income		(33	)		(45	)
Total lease expense	$	1,174		$	3,447

⁽¹⁾ Short-term lease expense includes all leases with lease terms ranging from less than one month to one year.

As of September 30, 2019, we do not have any leases that have not yet commenced that create significant rights and obligations.

Fiscal year 2018 lease commitments in accordance with prior guidance

Future minimum lease payments under non-cancelable operating leases, including short-term leases as of September 30, 2019 were as follows (in thousands):

2019 (for the remaining three months)	$	1,221
2020		4,612
2021		4,341
2022		4,044
2023		3,929
Thereafter		2,023
Total minimum lease payments	$	20,170

XML

Accounts Receivable, Net (Tables)

9 Months Ended

Sep. 30, 2019

Accounts Receivable Net [Abstract]

Schedule of Accounts Receivable Net

Accounts receivable, net is as follows (in thousands):

	As of			As of
	September 30, 2019			December 31, 2018
Accounts receivable	$	52,980		$	41,818
Allowance for doubtful accounts		(1,156	)		(711	)
Net accounts receivable	$	51,824		$	41,107

Schedule of Changes in Allowance for Doubtful Accounts

The following table summarizes the changes in the allowance for doubtful accounts (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Balance, beginning of period	$	(1,051	)	$	(716	)	$	(711	)	$	(863	)
Additions		(253	)		(134	)		(642	)		(25	)
Write-offs		148			30			197			68
Balance, end of period	$	(1,156	)	$	(820	)	$	(1,156	)	$	(820	)

Schedule of Changes in Sales Reserve

The following table summarizes the changes in the sales reserve (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Balance, beginning of period	$	(195	)	$	(209	)	$	(200	)	$	(100	)
Additions		—			—			—			(133	)
Write-offs		4			69			9			93
Balance, end of period	$	(191	)	$	(140	)	$	(191	)	$	(140	)

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Property and Equipment, Net

9 Months Ended

Sep. 30, 2019

Property Plant And Equipment [Abstract]

Property and Equipment, Net

(4) Property and Equipment, Net

Property and equipment consisted of the following (in thousands):

	Useful life in years		As of September 30, 2019			As of December 31, 2018
Furniture and equipment		5	$	1,734		$	1,189
Leasehold improvements (1)		5		4,025			2,776
System hardware		5		1,471			1,404
Office computers		3		4,667			3,745
Computer and system software		3		1,471			1,385
				13,368			10,499
Less accumulated depreciation and amortization				(7,339	)		(5,849	)
Property and equipment, net			$	6,029		$	4,650

⁽¹⁾ Lesser of the lease term or the estimated useful lives of the improvements, which may be up to 5 years.

Depreciation and amortization expense for property and equipment was $0.6 million and $0.5 million for the three months ended September 30, 2019 and 2018, respectively. Depreciation and amortization expense for property and equipment was $1.7 million and $1.4 million for the nine months ended September 30, 2019 and 2018, respectively.  

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Acquisitions

9 Months Ended

Sep. 30, 2019

Business Combinations [Abstract]

Acquisitions

(8) Acquisitions

The Company continually evaluates potential acquisitions that either strategically fit within the Company’s existing portfolio or expand the Company’s portfolio into new product lines or adjacent markets. The Company has completed a number of acquisitions that have been accounted for as business combinations and have resulted in the recognition of goodwill in the Company’s financial statements. This goodwill includes the know-how of the assembled workforce, the ability of the workforce to further improve technology and product offerings, customer relationships and the expected cash flows resulting from these efforts. Goodwill may also include expected synergies resulting from the complementary strategic fit these businesses bring to existing operations. The business acquisition discussed below is included in the Company’s results of operations from their respective dates of acquisition.

2019 Acquisitions

Mission Mode Solutions, Inc.

On April 1, 2019, the Company entered into a Stock Purchase Agreement with Mission Mode Solutions, Inc. (“Mission Mode”) pursuant to which the Company purchased all of the issued and outstanding shares of stock of Mission Mode for base consideration of $6.8 million. There is also a contingent payment of up to $1.0 million that can be earned in addition to the base consideration by the sellers based on successfully converting Mission Mode’s customers to the Company’s products. At the date of the acquisition, the Company preliminarily assessed the probabilities of Mission Mode meeting the future sales and billing thresholds and determined them to be probable. Therefore, contingent consideration was recorded as part of the purchase price allocation and the preliminary fair value of the contingent consideration was determined to be $0.6 million. The Company’s acquisition of Mission Mode was made primarily to expand the Company’s customer base and to a lesser extent to complement some of the existing facets of Mission Mode’s business with the Company’s existing products.   

The Company accounted for the acquisition of Mission Mode using the acquisition method of accounting for business combinations under FASB Accounting Standards Codification (“ASC”) 805, Business Combinations. The total purchase price is allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date.

Fair value estimates are based on a complex series of judgments about future events and uncertainties and rely heavily on estimates and assumptions. The judgments used to determine the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives and the expected future cash flows and related discount rates, can materially impact the Company’s results of operations. Significant inputs used for the model included the amount of cash flows, the expected period of the cash flows and the discount rates. 

The following table summarizes the allocation of the purchase consideration and the estimated fair value of the assets acquired and the liabilities assumed as well as the aggregate consideration during the three months ended June 30, 2019 for the acquisition of Mission Mode made by the Company (in thousands):

	Mission Mode
Assets acquired
Accounts receivable	$	295
Other assets		7
Property and equipment		6
Trade names		220
Acquired technology		310
Customer relationships		4,600
Goodwill		2,918
Total assets acquired		8,356
Liabilities assumed
Accounts payable and accrued expenses		152
Deferred revenue		880
Other liabilities		10
Net assets acquired	$	7,314
Consideration paid
Cash paid, net of cash acquired	$	6,764
Contingent consideration		550
Total	$	7,314

The weighted average useful life of all identified acquired intangible assets is 6.90 years. The weighted average useful lives for acquired technologies, customer relationships and trade names are 3.0 years, 7.0 years and 1.0 year, respectively. Identifiable intangible assets with definite lives are amortized over the period of estimated benefit using the straight-line method and the estimated useful lives of one to seven years. The straight-line method of amortization represents the Company’s best estimate of the distribution of the economic value of the identifiable intangible assets.

As a result of the acquisition, the Company recorded $2.9 million of goodwill. The goodwill balance is primarily attributed to the anticipated synergies from the acquisition and expanded market opportunities with respect to the integration of Mission Mode’s products with the Company's other solutions. The Company believes that the factors listed above in relation to the purchase of Mission Mode support the amount of goodwill recorded as a result of the purchase price paid for the acquisition, in relation to other acquired tangible and intangible assets. The resulting goodwill from the Mission Mode acquisition is not deductible for income tax purposes.

For the nine months ended September 30, 2019, the Company incurred transaction costs of $0.1 million in connection with the Mission Mode acquisition, which were expensed as incurred and included in general and administrative expenses within the accompanying consolidated statements of operations.

Neither the investment in the assets nor the results of operations of the acquisition of Mission Mode was significant to the Company’s consolidated financial position or results of operations, and thus pro forma information is not presented.

NC4 Inc. and NC4 Public Sector

On July 29, 2019, the Company entered into a Membership Interest Purchase Agreement (the “Purchase Agreement”) with NC4 Inc., NC4 Public Sector LLC, and Celerium Group Inc., pursuant to which the Company purchased all of the outstanding membership interests of NC4 Inc. and NC4 Public Sector LLC (collectively, “NC4”) for total consideration of approximately $84.5  million. The Company paid approximately $51.7  million in cash at closing from the Company’s cash and cash equivalents, which is subject to certain post-closing net working capital adjustments provided for in the Purchase Agreement. The remaining purchase price was paid with 320,998  newly issued shares of the Company’s common stock. On the date of this acquisition the price of the Company’s common stock on the Nasdaq Global Market was $102.18  price per share. On August 1, 2019, the Acquisition was consummated pursuant to the Purchase Agreement, except the transfer of the NC4 Public Sector business which was consummated on September 30, 2019.  The Company determined that the two transactions should be accounted for as a single transaction in accordance with ASC 810-10-40-6, Consolidation, as the transactions were entered in contemplation of one another and were essentially a single transaction designed to achieve an overall commercial effect. The Company’s acquisition of NC4 was made primarily to expand the Company’s customer base and to a lesser extent to complement some of the existing facets of NC4’s business with the Company’s existing products.

The Company accounted for the acquisition of NC4 using the acquisition method of accounting for business combinations under ASC 805. Acquired assets and liabilities were recorded at their estimated fair values as of the acquisition date.

As the Company finalizes their estimation of the fair value of the assets acquired and liabilities assumed, additional adjustments may be recorded during the measurement period (a period not to exceed 12 months). Fair value estimates are based on a complex series of judgments about future events and uncertainties and rely heavily on estimates and assumptions. The judgments used to determine the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives and the expected future cash flows and related discount rates, can materially impact the Company’s results of operations. Significant inputs used for the model included the amount of cash flows, the expected period of the cash flows and the discount rates. The finalization of the acquisition accounting valuation assessment may result in a change in the valuation of accounts receivable, deferred tax assets and liabilities, deferred revenue, and intangible assets, which could have a material impact on the Company’s results of operations and financial position. The initial accounting is incomplete as of September 30, 2019 for the acquired assets and liabilities noted above as the Company is currently in process of completing the assessment of valuation inputs and assumptions as well as completing the assessment of the tax attributes of the business combination.  

The following table summarizes the preliminary estimated fair value of the assets acquired and the liabilities assumed as well as the aggregate consideration during the three months ended September 30, 2019 for the acquisition of NC4 made by the Company (in thousands):

	NC4
Assets acquired
Accounts receivable	$	2,611
Other current assets		530
Property and equipment		75
Acquired technology		5,210
Trade names		8,610
Customer relationships		35,490
Goodwill		40,424
Total assets acquired		92,950
Liabilities assumed
Deferred revenue		7,540
Other current liabilities		917
Net assets acquired	$	84,493
Consideration paid
Cash paid	$	51,655
Fair value of common stock issued		32,838
Total	$	84,493

The weighted average useful life of all identified acquired intangible assets is 5.88 years. The average useful lives for acquired technologies, customer relationships and trade names are 3.0 years, 7.0 years and 3.0 years, respectively. Identifiable intangible assets with definite lives are amortized over the period of estimated benefit using the straight-line method and the estimated useful lives of three to seven years. The straight-line method of amortization represents the Company’s best estimate of the period of expected cash flows of the identifiable intangible assets.                              

As a result of the acquisition, the Company recorded $40.4 million of goodwill. The goodwill balance is primarily attributed to the anticipated synergies from the acquisition and expanded market opportunities with respect to the integration of NC4’s products with the Company's other solutions. The Company believes that the factors listed above in relation to the purchase of NC4 support the amount of goodwill recorded as a result of the purchase price paid for the acquisition, in relation to other acquired tangible and intangible assets. The resulting goodwill from the NC4 acquisition is deductible for income tax purposes.

For both the three and nine months ended September 30, 2019, the Company incurred transaction costs of $0.2 million in connection with the NC4 acquisition, which were expensed as incurred and included in general and administrative expenses within the accompanying consolidated statements of operations.

Unaudited Pro Forma Financial Information

The following tables reflect the results of acquired business included in our unaudited financial information for the three months ended September 30, 2019 as well as the unaudited pro forma combined results of operations for the three and nine months ended September 30, 2019 and the three and nine months ended September 30, 2018 as if the acquisition of NC4 had taken place on January 1, 2018. The unaudited pro forma financial information includes the effects of certain adjustments, including the amortization of acquired intangible assets and the associated tax effect and the elimination of the Company’s and the acquiree’s non-recurring acquisition related expenses (in thousands, except per share amounts):

	Revenue		Net loss
From the acquisition date to September 30, 2019	$	2,040	$	(1,465	)
For the three months ended September 30, 2019 pro forma		54,352		(13,387	)
For the nine months ended September 30, 2019 pro forma		154,719		(45,875	)
For the three months ended September 30, 2018 pro forma		43,037		(11,543	)
For the nine months ended September 30, 2018 pro forma		116,838		(48,652	)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Basic and diluted loss per share pro forma	$	(0.40	)	$	(0.39	)	$	(1.38	)	$	(1.66	)

The unaudited pro forma information presented does not purport to be indicative of the results that would have been achieved had the acquisition been consummated at January 1, 2018 nor of the results which may occur in the future. The pro forma adjustments are based upon available information and certain assumptions that the Company believes are reasonable.

2018 Acquisitions

For the year ended December 31, 2018, the Company acquired Unified Messaging Systems ASA, PlanetRisk, Inc. and Respond B.V. and accounted for the acquisitions using the acquisition method of accounting for business combinations under ASC 805. The acquisitions were not material individually or on a consolidated basis.

Unified Messaging Systems ASA

On April 3, 2018, the Company acquired Unified Messaging Systems ASA (“UMS”) in exchange for cash consideration of $31.9 million, net of cash acquired. UMS is an industry leader in the area of critical communication and population alerting systems and is headquartered in Oslo, Norway. The Company acquired UMS for its customer base and to complement some of the existing facets of UMS’ business with the Company’s existing products.

PlanetRisk, Inc.

On May 1, 2018, the Company acquired certain assets from PlanetRisk, Inc. (“PlanetRisk”) in exchange for cash consideration of $2.0 million. PlanetRisk is a provider of data analytics and visualization solutions. The Company acquired these assets from PlanetRisk for its customer base and to complement some of the existing facets of PlanetRisk’s business with the Company’s existing products.

Respond B.V.

On May 18, 2018, the Company acquired Respond B.V. (“Respond”) in exchange for current cash consideration of $2.0 million, net of cash acquired and issued a note to be paid one year after the transaction date in the amount of $0.4 million, for a total purchase price of $2.3 million. Respond is a provider of critical communication solutions and is headquartered in the Netherlands. The Company acquired Respond for its customer base and to complement some of the existing facets of Respond’s business with the Company’s existing products.

For the three and nine months ended September 30, 2018, the Company incurred transaction costs of $0.3 million and $0.6 million, respectively, in connection with the UMS, PlanetRisk and Respond acquisitions, which were expensed as incurred and included in general and administrative expenses within the accompanying consolidated statements of operations.

Neither the investment in the assets nor the results of operations of the acquisition of UMS, PlanetRisk and Respond was significant to the Company’s consolidated financial position or results of operations, and thus pro forma information is not presented.

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Basic and Diluted Net Loss Per Share

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Basic and Diluted Net Loss Per Share

(12) Basic and Diluted Net Loss per Share

Basic net loss per common share is computed by dividing net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share is computed by giving effect to all potential dilutive shares of common stock. Basic and diluted net loss per share of common stock were the same for all periods presented as the impact of all potentially dilutive securities outstanding was anti-dilutive. The Company uses the if converted method for calculating any potential dilutive effect on diluted loss per share.

The following common equivalent shares were excluded from the diluted net loss per share calculation because their inclusion would have been anti-dilutive:

	As of September 30,
	2019		2018
Stock options		797,848		1,836,671
Convertible senior notes		3,411,199		3,411,199
Non-vested performance-based restricted stock units		594,723		93,362
Non-vested market-based restricted stock units		—		11,877
Non-vested restricted stock units		650,093		417,209
Total		5,453,863		5,770,318

The Company is required to reserve and keep available from the Company’s authorized but unissued shares of common stock a number of shares equal to the number of shares subject to outstanding awards under the 2008 Plan and the number of shares reserved for issuance under each of the 2016 Plan and 2016 ESPP.

The amount of such shares of the Company’s common stock reserved for these purposes at September 30, 2019 is as follows:

	Number of Shares
Stock options issued and outstanding		797,848
Additional shares available for grant under equity plans		2,394,561
Total		3,192,409

In connection with the issuance of the Notes in November 2017, the Company paid $12.9 million to enter into capped call option agreements to reduce the potential dilution to holders of the Company’s common stock upon conversion of the Notes. The capped call option agreements are excluded from the calculation of diluted net loss per share attributable to common stockholders, as their effect is antidilutive.

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Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2019

Accounting Standards Update 2014-09

Disaggregation Of Revenue [Line Items]

Summary of Disaggregates Revenue

The following table disaggregates the Company’s revenue by geography which provides information as to the major source of revenue (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
Primary Geographic Markets	2019		2018		2019		2018
United States	$	41,827	$	31,140	$	112,483	$	87,318
International		10,720		7,785		31,288		17,948
Total	$	52,547	$	38,925	$	143,771	$	105,266

The following table presents the Company’s revenues disaggregated by revenue source (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Subscription services	$	46,385	$	35,998	$	132,043	$	98,327
Professional services		6,162		2,927		11,728		6,939
Total revenues	$	52,547	$	38,925	$	143,771	$	105,266

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Acquisitions (Tables)

9 Months Ended

Sep. 30, 2019

Mission Mode

Summary of Allocation of Purchase Consideration and Estimated Values of Assets Acquired and Liabilities Assumed

The following table summarizes the allocation of the purchase consideration and the estimated fair value of the assets acquired and the liabilities assumed as well as the aggregate consideration during the three months ended June 30, 2019 for the acquisition of Mission Mode made by the Company (in thousands):

	Mission Mode
Assets acquired
Accounts receivable	$	295
Other assets		7
Property and equipment		6
Trade names		220
Acquired technology		310
Customer relationships		4,600
Goodwill		2,918
Total assets acquired		8,356
Liabilities assumed
Accounts payable and accrued expenses		152
Deferred revenue		880
Other liabilities		10
Net assets acquired	$	7,314
Consideration paid
Cash paid, net of cash acquired	$	6,764
Contingent consideration		550
Total	$	7,314

NC4 Inc. and NC4 Public Sector LLC

Summary of Allocation of Purchase Consideration and Estimated Values of Assets Acquired and Liabilities Assumed

The following table summarizes the preliminary estimated fair value of the assets acquired and the liabilities assumed as well as the aggregate consideration during the three months ended September 30, 2019 for the acquisition of NC4 made by the Company (in thousands):

	NC4
Assets acquired
Accounts receivable	$	2,611
Other current assets		530
Property and equipment		75
Acquired technology		5,210
Trade names		8,610
Customer relationships		35,490
Goodwill		40,424
Total assets acquired		92,950
Liabilities assumed
Deferred revenue		7,540
Other current liabilities		917
Net assets acquired	$	84,493
Consideration paid
Cash paid	$	51,655
Fair value of common stock issued		32,838
Total	$	84,493

Summary of Unaudited Pro Forma Results of Operations

The following tables reflect the results of acquired business included in our unaudited financial information for the three months ended September 30, 2019 as well as the unaudited pro forma combined results of operations for the three and nine months ended September 30, 2019 and the three and nine months ended September 30, 2018 as if the acquisition of NC4 had taken place on January 1, 2018. The unaudited pro forma financial information includes the effects of certain adjustments, including the amortization of acquired intangible assets and the associated tax effect and the elimination of the Company’s and the acquiree’s non-recurring acquisition related expenses (in thousands, except per share amounts):

	Revenue		Net loss
From the acquisition date to September 30, 2019	$	2,040	$	(1,465	)
For the three months ended September 30, 2019 pro forma		54,352		(13,387	)
For the nine months ended September 30, 2019 pro forma		154,719		(45,875	)
For the three months ended September 30, 2018 pro forma		43,037		(11,543	)
For the nine months ended September 30, 2018 pro forma		116,838		(48,652	)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Basic and diluted loss per share pro forma	$	(0.40	)	$	(0.39	)	$	(1.38	)	$	(1.66	)

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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Sep. 30, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	33,778,616	29,700,192
Common stock, shares outstanding	33,778,616	29,700,192

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Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net loss	$ (39,118)	$ (37,710)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	13,192	10,172
Amortization of deferred costs	5,486	3,928
Accretion of interest on convertible senior notes	3,667	3,435
Provision for doubtful accounts and sales reserve	642	158
Stock-based compensation	24,094	20,007
Other non-cash adjustments	(47)	(345)
Changes in operating assets and liabilities:
Accounts receivable	(8,405)	1,524
Prepaid expenses	(5,144)	(2,439)
Deferred costs	(8,438)	(6,991)
Other assets	924	(1,584)
Accounts payable	7,318	(113)
Accrued payroll and employee related liabilities	1,974	2,109
Accrued expenses	(296)	(621)
Deferred revenue	12,373	7,237
Other liabilities	632	457
Net cash provided by (used in) operating activities	8,854	(776)
Cash flows from investing activities:
Capital expenditures	(4,417)	(855)
Proceeds from landlord reimbursement	1,143
Payments for acquisition of business, net of acquired cash	(58,419)	(35,857)
Purchase of short-term investments	(1,975)	(57,709)
Maturities of short-term investments	47,765	74,069
Additions to intangibles		(184)
Additions to capitalized software development costs	(5,867)	(6,722)
Net cash used in investing activities	(21,770)	(27,258)
Cash flows from financing activities:
Restricted stock units withheld to settle employee tax withholding liability	(4,531)	(7,921)
Proceeds from public offering, net of costs	139,110
Proceeds from employee stock purchase plan	2,337	1,758
Proceeds from stock option exercises	15,822	8,821
Other	(548)	(635)
Net cash provided by financing activities	152,190	2,023
Effect of exchange rates on cash, cash equivalents and restricted cash	(227)	(746)
Net increase (decrease) in cash, cash equivalents and restricted cash	139,047	(26,757)
Cash, cash equivalents and restricted cash—beginning of period	60,068	103,051
Cash, cash equivalents and restricted cash—end of period	199,115	76,294
Supplemental disclosures of cash flow information:
Interest	863	771
Taxes, net of refunds received		43
Supplemental disclosure of non-cash activities:
Capitalized assets included in accounts payable and accrued expenses	122	278
Capitalized development costs included in accounts payable and accrued expenses	7
Common stock issued in connection with acquisition	32,838
Contingent consideration in connection with acquisition	550
Note payable issued for asset acquisition		52
Stock-based compensation capitalized for software development	$ 420	$ 250

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Goodwill and Intangible Assets, Net - Schedule of Changes in Gross Carrying Amount of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill, beginning balance	$ 48,382
Foreign currency translation	(1,018)
Increase due to acquisitions	43,342
Goodwill, ending balance	$ 90,706

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Acquisitions - Summary of Allocation of Purchase Consideration and Estimated Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands			3 Months Ended		9 Months Ended
	Jul. 29, 2019	Apr. 01, 2019	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Assets acquired
Goodwill			$ 90,706		$ 90,706		$ 48,382
Consideration paid
Cash paid					58,419	$ 35,857
Contingent consideration					550
Mission Mode
Assets acquired
Accounts receivable				$ 295
Other assets				7
Property and equipment				6
Goodwill			2,900	2,918	2,900
Total assets acquired				8,356
Liabilities assumed
Accounts payable and accrued expenses				152
Deferred revenue				880
Other liabilities				10
Net assets acquired				7,314
Consideration paid
Cash paid, net of cash acquired				6,764
Contingent consideration		$ 600		550
Total		$ 6,800		7,314
NC4 Inc. and NC4 Public Sector LLC
Assets acquired
Accounts receivable			2,611		2,611
Other current assets			530		530
Property and equipment			75		75
Goodwill			40,424		40,424
Total assets acquired			92,950		92,950
Liabilities assumed
Deferred revenue			7,540		7,540
Other current liabilities			917		917
Net assets acquired			84,493		84,493
Consideration paid
Cash paid, net of cash acquired	$ 51,700
Cash paid			51,655
Fair value of common stock issued			32,838
Total	$ 84,500		84,493
Trade Names | Mission Mode
Assets acquired
Intangible assets other than goodwill				220
Trade Names | NC4 Inc. and NC4 Public Sector LLC
Assets acquired
Intangible assets other than goodwill			8,610		8,610
Acquired Technology | Mission Mode
Assets acquired
Intangible assets other than goodwill				310
Acquired Technology | NC4 Inc. and NC4 Public Sector LLC
Assets acquired
Intangible assets other than goodwill			5,210		5,210
Customer Relationships | Mission Mode
Assets acquired
Intangible assets other than goodwill				$ 4,600
Customer Relationships | NC4 Inc. and NC4 Public Sector LLC
Assets acquired
Intangible assets other than goodwill			$ 35,490		$ 35,490

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Stock Plans and Stock-Based Compensation - Summary of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 8,301	$ 3,541	$ 24,094	$ 20,257
Cost of Revenue
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	509	312	1,356	1,877
Sales and Marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	2,423	1,180	7,338	7,147
Research and Development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	1,732	1,091	5,560	5,606
General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 3,637	$ 958	$ 9,840	$ 5,627

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Leases - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Leases [Abstract]
Lease expiration period start			2019
Lease expiration period end			2027
Operating lease expense	$ 1,207	$ 900	$ 3,492	$ 2,600
Option to extend			true
Operating lease, not yet commenced, description			As of September 30, 2019, we do not have any leases that have not yet commenced that create significant rights and obligations.

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Revenue Recognition - Summary of Revenues Disaggregated by Geography (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation Of Revenue [Line Items]
Revenue	$ 52,547	$ 38,925	$ 143,771	$ 105,266
United States
Disaggregation Of Revenue [Line Items]
Revenue	41,827	31,140	112,483	87,318
International
Disaggregation Of Revenue [Line Items]
Revenue	$ 10,720	$ 7,785	$ 31,288	$ 17,948

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Stock Plans and Stock-Based Compensation - Restricted Stock Units - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 8,301	$ 3,541	$ 24,094	$ 20,257
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation, number of stock unit grants in period			359,474
Stock-based compensation expense	3,700	$ 2,300	$ 12,000	$ 4,400
Number of stock units vested			272,022	138,155
Unrecognized compensation expense	$ 36,300		$ 36,300
Weighted-average amortization period			2 years 6 months 18 days

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Stock Plans and Stock-Based Compensation - Schedule of Assumptions Used in Determining Fair Value of Stock Option Grants (Parenthetical) (Details)	9 Months Ended
	Sep. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Dividend rate	0.00%

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Basic and Diluted Net Loss Per Share - Summary of Common Stock Reserved (Details)	Sep. 30, 2019 shares
Class Of Stock [Line Items]
Amount of common stock reserved	3,192,409
Stock Options
Class Of Stock [Line Items]
Amount of common stock reserved	797,848
Additional Shares Available for Grant Under Equity Plan
Class Of Stock [Line Items]
Amount of common stock reserved	2,394,561

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Stock Plans and Stock-Based Compensation

9 Months Ended

Sep. 30, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock Plans and Stock-Based Compensation

(11) Stock Plans and Stock-Based Compensation

The Company’s 2016 Equity Incentive Plan (the “2016 Plan”) became effective on September 15, 2016. The 2016 Plan provides for the grant of incentive stock options, non-qualified stock options, restricted stock awards, restricted stock unit awards, stock appreciation rights and performance share awards to employees, directors and consultants of the Company. A total of 3,893,118 shares of the Company’s common stock were initially reserved for issuance under the 2016 Plan, which is the sum of (1) 2,000,000 shares, (2) the number of shares reserved for issuance under the Company’s 2008 Equity Incentive Plan or the 2008 Plan, at the time the 2016 Plan became effective (up to a maximum of 42,934 shares) and (3) shares subject to stock options or other stock awards granted under the 2008 Plan that would have otherwise returned to the Company’s 2008 Plan (up to a maximum of 1,850,184 shares). The number of shares of common stock reserved for issuance under the 2016 Plan will automatically increase on January 1 of each year, beginning on January 1, 2017, by 3% of the number of shares of the Company’s capital stock outstanding on the immediately preceding December 31, or such lesser number of shares as determined by the Company’s board of directors.

As a result of the adoption of the 2016 Plan, no further grants may be made under the 2008 Plan. The 2008 Plan provided for the grant of stock options to the Company’s employees, directors and consultants. Stock option awards were granted with an exercise price equal to the fair market value of the Company’s common stock at the date of grant as determined by the Company’s board of directors. The option awards generally vested over four years and were exercisable any time after vesting. The stock options expire ten years after the date of grant.   

2016 Employee Stock Purchase Plan

The Company’s Employee Stock Purchase Plan (the “2016 ESPP”) became effective on September 15, 2016. A total of 500,000 shares of the Company’s common stock were initially reserved for issuance under the 2016 Plan. The number of shares reserved for issuance under the 2016 ESPP will automatically increase on January 1 of each year, beginning on January 1, 2017, by the lesser of 200,000 shares of the Company’s common stock, 1% of the number of shares of the Company’s common stock outstanding on the immediately preceding December 31, or such lesser number of shares as determined by the Company’s board of directors.

The 2016 ESPP allows eligible employees to purchase shares of the Company’s common stock at a discount of up to 15% through payroll deductions of their eligible compensation, subject to any plan limitations. The 2016 ESPP provides for separate six-month offering periods beginning each March and September of each fiscal year.

On each purchase date, eligible employees will purchase the Company’s stock at a price per share equal to 85% of the lesser of (i) the fair market value of the Company’s common stock on the offering date or (ii) the fair market value of the Company’s common stock on the purchase date.

For the nine months ended September 30, 2019 and 2018, 42,481 and 74,517 shares of common stock were purchased under the 2016 ESPP, respectively. The 2016 ESPP is considered compensatory for purposes of stock-based compensation expense. The Company recorded stock-based compensation expense of $0.2 million and $0.2 million for the three months ended September 30, 2019 and 2018, respectively. The Company recorded stock-based compensation expense of $0.7 million and $0.5 million for the nine months ended September 30, 2019 and 2018, respectively.  

Stock Options

The Company recorded stock-based compensation expense of $1.3 million and $0.7 million for the three months ended September 30, 2019 and 2018, respectively. The Company recorded stock-based compensation expense of $4.7 million and $4.7 million for the nine months ended September 30, 2019 and 2018, respectively.   

The total intrinsic value of options exercised for the nine months ended September 30, 2019 was $44.5 million. This intrinsic value represents the difference between the fair market value of the Company’s common stock on the date of exercise and the exercise price of each option. Based on the fair market value of the Company’s common stock at September 30, 2019, the total intrinsic value of all outstanding options was $28.2 million.

The fair value of stock option grants and ESPP are determined using the Black-Scholes option pricing model with the following weighted average assumptions. In addition, the fair value per share on grant date is presented below: 

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Employee Stock Options:
Fair value per share on grant date		—	$58.75			—	$33.06 - $58.75
Expected term (in years) (1)		—		6.00		—		6.00
Expected volatility (2)		—	45%			—	45% - 50%
Risk-free interest rate (3)		—	2.72%			—	2.72% - 2.98%
Dividend rate (4)		—	0%			—	0%
Employee Stock Purchase Plan:
Expected term (in years) (1)		0.50		0.50		0.50		0.50
Expected volatility (2)	45%		45% - 50%		45%		45% - 60%
Risk-free interest rate (3)	1.93% - 2.52%		1.89% - 2.33%		1.93% - 2.52%		1.18% - 2.33%
Dividend rate (4)	0%		0%		0%		0%

⁽¹⁾ The expected term represents the period that the stock-based compensation awards are expected to be outstanding. Since the Company did not have sufficient historical information to develop reasonable expectations about future exercise behavior, the Company used the simplified method to compute expected term, which reflects the average of the time-to-vesting and the contractual life;

⁽²⁾ The expected volatility of the Company’s common stock on the date of grant is based on the weighted average of the Company’s historical volatility as a public company and the volatilities of publicly traded peer companies that are reasonably comparable to the Company’s own operations;

⁽³⁾ The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for zero coupon U.S. Treasury notes with maturities approximately equal to the expected term of the grant; and

⁽⁴⁾ The expected dividend yield is assumed to be zero as the Company has never paid dividends and has no current plans to pay any dividends on the Company’s common stock.

Total unrecognized compensation cost related to nonvested stock options was approximately $7.6 million as of September 30, 2019 and is expected to be recognized over a weighted average period of 2.1 years.

A summary of activities under the 2008 Plan and the 2016 Plan is shown as follows for the year ended December 31, 2018 and the nine months ended September 30, 2019:

	Stock options outstanding			Weighted average exercise price
Outstanding at December 31, 2017		2,440,290		$	16.55
Granted		557,896			35.01
Exercised		(778,370	)		13.04
Forfeited		(473,743	)		22.35
Outstanding at December 31, 2018		1,746,073			22.43
Granted		—			—
Exercised		(851,467	)		18.58
Forfeited		(96,758	)		23.95
Outstanding at September 30, 2019		797,848			26.36

Stock-based compensation expense is recognized over the award’s expected vesting schedule, which is reduced for forfeitures.

Stock options outstanding, and options exercisable and vested are as follows:

Outstanding as of September 30, 2019		Remaining contractual life (years)		Weighted average exercise price		Exercisable as of September 30, 2019		Remaining contractual life (years)		Weighted average exercise price
	797,848		7.65	$	26.36		222,219		6.53	$	18.21

Outstanding as of December 31, 2018		Remaining contractual life (years)		Weighted average exercise price		Exercisable as of December 31, 2018		Remaining contractual life (years)		Weighted average exercise price
	1,746,073		7.89	$	22.43		579,319		6.73	$	8.13

Vested and nonvested stock option activity was as follows:

	Vested				Nonvested
	Options outstanding		Weighted average exercise price		Options outstanding		Weighted average exercise price
Outstanding at September 30, 2019		222,219	$	18.21		575,629	$	29.50
Outstanding at December 31, 2018		579,319	$	8.13		1,166,754	$	26.58

Restricted Stock Units

During the nine months ended September 30, 2019, the Company granted 359,474 restricted stock units (“RSUs”) to members of its senior management and certain other employees pursuant to the 2016 Plan. The Company accounts for RSUs issued to employees at fair value, based on the market price of the Company’s common stock on the date of grant. During the three months ended September 30, 2019 and 2018, the Company recorded $3.7 million and $2.3 million, respectively, of stock-based compensation related to the RSUs that had been issued to-date. During the nine months ended September 30, 2019 and 2018, the Company recorded $12.0 million and $4.4 million, respectively, of stock-based compensation related to the RSUs. There were 272,022 RSUs that vested during the nine months ended September 30, 2019. There were 138,155 RSUs that vested during the nine months ended September 30, 2018.

As of September 30, 2019, there was $36.3 million of unrecognized compensation expense related to unvested employee RSU awards which is expected to be recognized over a weighted-average period of approximately 2.55 years. For RSUs subject to graded vesting, the Company recognizes compensation cost on a straight-line basis over the service period for the entire award.

Performance-Based Restricted Stock Units

During the nine months ended September 30, 2019, the Company granted 328,343 performance-based restricted stock units (“PSUs”) to members of its management pursuant to the 2016 Plan. The PSUs generally vest based on the Company achieving certain revenue growth thresholds which range from 20% to 40% compounded annual growth over a measurement period of two years for the first 50% of PSUs and three years for the remaining PSUs. The vesting of the PSUs is subject to the employee’s continued employment with the Company through the date of achievement. The share price of the Company’s common stock on the date of issuance of the PSUs ranged from $54.83 to $98.92 per share. The fair value is based on value of the common stock at the date of issuance and the probability of achieving the performance metric. Compensation cost is adjusted in future periods for subsequent changes in the expected outcome of the performance related conditions. During the three months ended September 30, 2019 and 2018, the Company recognized $3.1 million and $0.2 million, respectively, of stock compensation expense in connection with the PSU awards. During the nine months ended September 30, 2019 and 2018, the Company recognized $6.7 million and $0.4 million, respectively, of stock compensation expense in connection with the PSU awards.  

As of September 30, 2019, there was $31.8 million of unrecognized compensation expense related to unvested PSUs which is expected to be recognized over a weighted-average period of approximately 2.14 years. Compensation cost is recognized under the accelerated method and is adjusted in future periods for subsequent changes in the expected outcome of the performance related conditions.

None of the PSUs had vested as of September 30, 2019.

Market-Based Restricted Stock Units

The Company granted no market-based restricted stock units (“market-based RSUs”) pursuant to the 2016 Plan during the nine months ended September 30, 2019. Market-based RSUs vested based on the Company achieving certain stock price thresholds, which range from $35 per share to $65 per share for 30 consecutive trading days as reported by The Nasdaq Stock Market, LLC, subject to the employee’s continued employment with the Company through the date of achievement. The share price of the Company’s common stock on the date of issuance of the market-based RSUs was $23.16 to $51.99 per share. The fair value was based on values calculated under the Monte Carlo simulation model on the grant date. The key estimates used in the Monte-Carlo simulation were a risk-free rate of 2.26% to 2.85%, dividend yield of zero, expected term of 10 years and volatility of 50% to 60%. Compensation cost is not adjusted in future periods for subsequent changes in the expected outcome of market related conditions. No stock-based compensation expense was recorded during the nine months ended September 30, 2019 as all issued market-based RSUs were fully vested previously. For the three and nine months ended September 30, 2018, the Company recognized $0.1 million and $10.3 million, respectively, of stock compensation expense in connection with these awards.  

As of September 30, 2019, there was no unrecognized compensation expense related to unvested market-based awards.  The Company recognizes compensation cost on a straight-line basis over the service period for the entire award.

There were 657 and 543,825 market-based RSUs which had vested during the nine months ended September 30, 2019 and 2018, respectively.  

A summary of activity in connection with the Company’s RSUs, market-based RSUs and PSUs for the nine-month period ended September 30, 2019 is as follows:

	Number of Shares
Outstanding as of December 31, 2018		904,033
Granted		687,817
Vested		(271,853	)
Forfeited		(75,181	)
Outstanding as of September 30, 2019		1,244,816

Stock-Based Compensation Expense

The Company recorded the total stock-based compensation expense as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Cost of revenue	$	509	$	312	$	1,356	$	1,877
Sales and marketing		2,423		1,180		7,338		7,147
Research and development		1,732		1,091		5,560		5,606
General and administrative		3,637		958		9,840		5,627
Total	$	8,301	$	3,541	$	24,094	$	20,257

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Accounts Receivable, Net

9 Months Ended

Sep. 30, 2019

Accounts Receivable Net [Abstract]

Accounts Receivable, Net

(3) Accounts Receivable, Net

Accounts receivable, net is as follows (in thousands):

	As of			As of
	September 30, 2019			December 31, 2018
Accounts receivable	$	52,980		$	41,818
Allowance for doubtful accounts		(1,156	)		(711	)
Net accounts receivable	$	51,824		$	41,107

Bad debt expense was $0.3 million and $0.1 million for the three months ended September 30, 2019 and 2018, respectively. Bad debt expense was $0.6 million and $0.1 million for the nine months ended September 30, 2019 and 2018, respectively.

The following table summarizes the changes in the allowance for doubtful accounts (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Balance, beginning of period	$	(1,051	)	$	(716	)	$	(711	)	$	(863	)
Additions		(253	)		(134	)		(642	)		(25	)
Write-offs		148			30			197			68
Balance, end of period	$	(1,156	)	$	(820	)	$	(1,156	)	$	(820	)

The following table summarizes the changes in the sales reserve (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Balance, beginning of period	$	(195	)	$	(209	)	$	(200	)	$	(100	)
Additions		—			—			—			(133	)
Write-offs		4			69			9			93
Balance, end of period	$	(191	)	$	(140	)	$	(191	)	$	(140	)

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Goodwill and Intangible Assets, Net

9 Months Ended

Sep. 30, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets, Net

(7) Goodwill and Intangible Assets, Net

Goodwill was $90.7 million and $48.4 million as of September 30, 2019 and December 31, 2018, respectively. There were no impairments recorded against goodwill during the nine months ended September 30, 2019 and for the year ended December 31, 2018. The following table displays the changes in the gross carrying amount of goodwill (in thousands):

Balance at December 31, 2018	$	48,382
Foreign currency translation		(1,018	)
Increase due to acquisitions		43,342
Balance at September 30, 2019	$	90,706

Intangible assets consisted of the following (in thousands):

				As of September 30, 2019
	Gross carrying amount		Weighted average life (years)	Accumulated amortization			Net carrying amount
Amortizable intangible assets:
Developed technology	$	9,436	3.00	$	(3,412	)	$	6,024
Tradenames		11,452	3.48		(1,940	)		9,512
Non-compete		240	2.00		(240	)		—
Customer relationships		63,119	6.84		(8,031	)		55,088
Total intangible assets	$	84,247		$	(13,623	)	$	70,624

				As of December 31, 2018
	Gross carrying amount		Weighted average life (years)	Accumulated amortization			Net carrying amount
Amortizable intangible assets:
Developed technology	$	5,090	3.04	$	(3,225	)	$	1,865
Tradenames		3,193	4.51		(1,526	)		1,667
Non-compete		240	2.00		(230	)		10
Customer relationships		26,990	6.39		(7,335	)		19,655
Total intangible assets	$	35,513		$	(12,316	)	$	23,197

Amortization expense for intangible assets was $3.1 million and $1.9 million for the three months ended September 30, 2019 and 2018, respectively. Amortization expense for intangible assets was $6.4 million and $4.5 million for the nine months ended September 30, 2019 and 2018, respectively.    

The expected amortization of the intangible assets, as of September 30, 2019, for each of the next five years and thereafter is as follows (in thousands):

2019 (for the remaining three months)	$	4,015
2020		14,786
2021		14,410
2022		11,200
2023		8,367
Thereafter		17,846
	$	70,624

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Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 194,742	$ 59,978
Restricted cash	1,026	90
Short-term investments		45,541
Accounts receivable, net	51,824	41,107
Prepaid expenses	10,347	4,890
Deferred costs and other current assets	10,548	10,909
Total current assets	268,487	162,515
Property and equipment, net	6,029	4,650
Capitalized software development costs, net	14,092	12,893
Goodwill	90,706	48,382
Intangible assets, net	70,624	23,197
Restricted cash	3,347
Deferred costs and other assets	26,423	10,543
Total assets	479,708	262,180
Current liabilities:
Accounts payable	8,832	2,719
Accrued payroll and employee related liabilities	19,674	17,108
Accrued expenses	5,481	5,565
Deferred revenue	112,058	92,738
Note payable		427
Other current liabilities	6,482	1,490
Total current liabilities	152,527	120,047
Long-term liabilities:
Deferred revenue, noncurrent	4,371	2,898
Convertible senior notes	97,764	94,097
Deferred tax liabilities	1,197	1,032
Other long term liabilities	12,751	1,948
Total liabilities	268,610	220,022
Commitments and contingencies
Stockholders' equity:
Preferred stock, par value $0.001, 10,000,000 shares authorized, no shares issued or outstanding as of September 30, 2019 and December 31, 2018, respectively
Common stock, $0.001 par value, 100,000,000 shares authorized, 33,778,616 and 29,700,192 shares issued and outstanding as of September 30, 2019 and December 31, 2018, respectively	34	30
Additional paid-in capital	404,676	194,866
Accumulated deficit	(186,788)	(147,670)
Accumulated other comprehensive loss	(6,824)	(5,068)
Total stockholders’ equity	211,098	42,158
Total liabilities and stockholders’ equity	$ 479,708	$ 262,180

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Condensed Consolidated Statements of Stockholders' Equity (unaudited) - USD ($) $ in Thousands	Total	NC4 Inc. and NC4 Public Sector LLC	Common Stock	Common Stock NC4 Inc. and NC4 Public Sector LLC	Additional Paid-in Capital	Additional Paid-in Capital NC4 Inc. and NC4 Public Sector LLC	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2017	$ 55,991		$ 28		$ 164,995		$ (109,252)	$ 220
Balance, shares at Dec. 31, 2017			28,330,460
Cumulative effect of adoption of ASU 2014-09, net of taxes	9,097						9,097
Stock-based compensation	6,694				6,694
Vesting of restricted stock units, shares			222,624
Restricted stock units withheld to settle employee tax withholding liability	(1,022)				(1,022)
Restricted stock units withheld to settle employee tax withholding liability, shares			(27,771)
Exercise of stock options	1,466		$ 1		1,465
Exercise of stock options, shares			153,744
Issuance of shares under employee stock purchase plan	881				881
Issuance of shares under employee stock purchase plan, shares			44,193
Other comprehensive income (loss)	(267)							(267)
Net loss	(12,342)						(12,342)
Balance at Mar. 31, 2018	60,498		$ 29		173,013		(112,497)	(47)
Balance, shares at Mar. 31, 2018			28,723,250
Balance at Dec. 31, 2017	55,991		$ 28		164,995		(109,252)	220
Balance, shares at Dec. 31, 2017			28,330,460
Net loss	(37,710)
Balance at Sep. 30, 2018	47,723		$ 29		187,909		(137,865)	(2,350)
Balance, shares at Sep. 30, 2018			29,625,465
Balance at Dec. 31, 2017	$ 55,991		$ 28		164,995		(109,252)	220
Balance, shares at Dec. 31, 2017			28,330,460
Exercise of stock options, shares	778,370
Balance at Dec. 31, 2018	$ 42,158		$ 30		194,866		(147,670)	(5,068)
Balance, shares at Dec. 31, 2018			29,700,192
Balance at Mar. 31, 2018	60,498		$ 29		173,013		(112,497)	(47)
Balance, shares at Mar. 31, 2018			28,723,250
Stock-based compensation	10,022				10,022
Vesting of restricted stock units, shares			221,624
Restricted stock units withheld to settle employee tax withholding liability	(2,750)				(2,750)
Restricted stock units withheld to settle employee tax withholding liability, shares			(53,326)
Exercise of stock options	4,369				4,369
Exercise of stock options, shares			367,819
Other comprehensive income (loss)	(2,384)							(2,384)
Net loss	(16,918)						(16,918)
Balance at Jun. 30, 2018	52,837		$ 29		184,654		(129,415)	(2,431)
Balance, shares at Jun. 30, 2018			29,259,367
Stock-based compensation	3,541				3,541
Vesting of restricted stock units, shares			226,883
Restricted stock units withheld to settle employee tax withholding liability	(4,149)				(4,149)
Restricted stock units withheld to settle employee tax withholding liability, shares			(73,372)
Exercise of stock options	2,986				2,986
Exercise of stock options, shares			182,263
Issuance of shares under employee stock purchase plan	877				877
Issuance of shares under employee stock purchase plan, shares			30,324
Other comprehensive income (loss)	81							81
Net loss	(8,450)						(8,450)
Balance at Sep. 30, 2018	47,723		$ 29		187,909		(137,865)	(2,350)
Balance, shares at Sep. 30, 2018			29,625,465
Balance at Dec. 31, 2018	42,158		$ 30		194,866		(147,670)	(5,068)
Balance, shares at Dec. 31, 2018			29,700,192
Issuance of common stock, net of cost	138,839		$ 3		138,836
Issuance of common stock, net of cost, shares			2,645,000
Stock-based compensation	7,849				7,849
Vesting of restricted stock units, shares			16,849
Restricted stock units withheld to settle employee tax withholding liability	(333)				(333)
Restricted stock units withheld to settle employee tax withholding liability, shares			(5,301)
Exercise of stock options	8,746				8,746
Exercise of stock options, shares			501,083
Issuance of shares under employee stock purchase plan	1,283				1,283
Issuance of shares under employee stock purchase plan, shares			24,266
Other comprehensive income (loss)	22							22
Net loss	(14,134)						(14,134)
Balance at Mar. 31, 2019	184,430		$ 33		351,247		(161,804)	(5,046)
Balance, shares at Mar. 31, 2019			32,882,089
Balance at Dec. 31, 2018	$ 42,158		$ 30		194,866		(147,670)	(5,068)
Balance, shares at Dec. 31, 2018			29,700,192
Exercise of stock options, shares	851,467
Net loss	$ (39,118)
Balance at Sep. 30, 2019	211,098		$ 34		404,676		(186,788)	(6,824)
Balance, shares at Sep. 30, 2019			33,778,616
Balance at Mar. 31, 2019	184,430		$ 33		351,247		(161,804)	(5,046)
Balance, shares at Mar. 31, 2019			32,882,089
Issuance of common stock, net of cost	(5)				(5)
Stock-based compensation	8,282				8,282
Vesting of restricted stock units, shares			25,720
Restricted stock units withheld to settle employee tax withholding liability	(116)				(116)
Restricted stock units withheld to settle employee tax withholding liability, shares			(1,410)
Exercise of stock options	4,741				4,741
Exercise of stock options, shares			243,920
Other comprehensive income (loss)	271							271
Net loss	(12,063)						(12,063)
Balance at Jun. 30, 2019	185,540		$ 33		364,149		(173,867)	(4,775)
Balance, shares at Jun. 30, 2019			33,150,319
Issuance of common stock in connection with acquisition		$ 32,838				$ 32,838
Issuance of common stock in connection with acquisition, shares				320,998
Stock-based compensation	8,383				8,383
Vesting of restricted stock units, shares			229,284
Restricted stock units withheld to settle employee tax withholding liability	(4,082)				(4,082)
Restricted stock units withheld to settle employee tax withholding liability, shares			(46,664)
Exercise of stock options	2,335		$ 1		2,334
Exercise of stock options, shares			106,464
Issuance of shares under employee stock purchase plan	1,054				1,054
Issuance of shares under employee stock purchase plan, shares			18,215
Other comprehensive income (loss)	(2,049)							(2,049)
Net loss	(12,921)						(12,921)
Balance at Sep. 30, 2019	$ 211,098		$ 34		$ 404,676		$ (186,788)	$ (6,824)
Balance, shares at Sep. 30, 2019			33,778,616

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Leases (Tables)

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

Summary of Additional Information Related to Leases

Additional information related to the Company’s leases as of and for the nine months ended September 30, 2019, is as follows (in thousands, except lease term and discount rate):

	September 30, 2019
Balance sheet information
ROU assets	$	13,824
Lease liabilities, current	$	3,514
Lease liabilities, non-current		12,714
Total lease liabilities	$	16,228
Supplemental data
Weighted average remaining lease term	4.33 years
Weighted average discount rate		7.00	%
Cash paid for amounts included in lease liabilities	$	2,648
ROU assets obtained in exchange for lease obligations	$	17,726

Schedule of Maturities of Lease Liabilities

Maturities of lease liabilities as of September 30, 2019 were as follows (in thousands):

Year ending December 31,
2019 (for the remaining three months)	$	1,160
2020		4,487
2021		4,341
2022		4,044
2023		3,929
Thereafter		2,023
Total undiscounted lease payments		19,984
Less: imputed interest		(3,756	)
Total lease liabilities	$	16,228

Schedule of Components of Lease Expense

The following table presents components of lease expense for the three and nine months ended September 30, 2019 (in thousands):

	Three Months Ended			Nine Months Ended
	September 30, 2019			September 30, 2019
Operating lease expense	$	1,069		$	2,802
Short-term lease expense(1)		138			690
		1,207			3,492
Less: Sublease income		(33	)		(45	)
Total lease expense	$	1,174		$	3,447

⁽¹⁾ Short-term lease expense includes all leases with lease terms ranging from less than one month to one year.

Schedule of Future Minimum Lease Payments Under Noncancelable Operating Leases Including Short Term Leases

Future minimum lease payments under non-cancelable operating leases, including short-term leases as of September 30, 2019 were as follows (in thousands):

2019 (for the remaining three months)	$	1,221
2020		4,612
2021		4,341
2022		4,044
2023		3,929
Thereafter		2,023
Total minimum lease payments	$	20,170

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Convertible Senior Notes (Tables)

9 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Schedule of Components of Convertible Senior Notes

The Notes consist of the following (in thousands):

	As of September 30, 2019			As of December 31, 2018
Liability component:
Principal	$	115,000		$	115,000
Less: debt discount, net of amortization		(17,236	)		(20,903	)
Net carrying amount	$	97,764		$	94,097
Equity component (1)		22,094			22,094

⁽¹⁾ Recorded in the consolidated balance sheet within additional paid-in capital, net of $0.8 million transaction costs in equity as of December 31, 2017.

Summary of Total Interest Expense Recognized Related To Convertible Senior Notes

The following table sets forth total interest expense recognized related to the Notes (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
1.50% coupon	$	429	$	432	$	1,294	$	1,301
Amortization of debt discount and transaction costs		1,243		1,160		3,667		3,435
	$	1,672	$	1,592	$	4,961	$	4,736

Summary of Fair Value and Carrying Value of Convertible Senior Notes

As of September 30, 2019 and December 31, 2018, the fair value of the Notes, which was determined based on inputs that are observable in the market or that could be derived from, or corroborated with, observable market data, quoted price of the Notes in an over-the-counter market (Level 2), and carrying value of debt instruments (carrying value excludes the equity component of the Company’s convertible notes classified in equity) were as follows (in thousands):

	As of September 30, 2019				As of December 31, 2018
	Fair Value		Carrying Value		Fair Value		Carrying Value
Convertible senior notes	$	217,947	$	97,764	$	189,802	$	94,097

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Goodwill and Intangible Assets, Net - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 90,706,000		$ 90,706,000		$ 48,382,000
Impairment of goodwill			0		$ 0
Amortization expense for intangible assets	$ 3,100,000	$ 1,900,000	$ 6,400,000	$ 4,500,000

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Acquisitions - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands						3 Months Ended			9 Months Ended
	Jul. 29, 2019	Apr. 01, 2019	May 18, 2018	May 01, 2018	Apr. 03, 2018	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
Note payable									$ 550
Goodwill						$ 90,706			90,706		$ 48,382
Purchase price of acquisition, cash									$ 58,419	$ 35,857
Mission Mode
Business Acquisition [Line Items]
Date of acquisition of business		Apr. 01, 2019
Total purchase price		$ 6,800					$ 7,314
Note payable		600					550
Weighted average useful life of identified acquired intangible assets									6 years 10 months 24 days
Goodwill						2,900	2,918		$ 2,900
Business acquisition transaction costs									$ 100
Cash paid							$ 6,764
Mission Mode | Acquired Technology
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets									3 years
Mission Mode | Customer Relationships
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets									7 years
Mission Mode | Trade Names
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets									1 year
Mission Mode | Maximum
Business Acquisition [Line Items]
Contingent payment		$ 1,000
Estimated useful life									7 years
Mission Mode | Minimum
Business Acquisition [Line Items]
Estimated useful life									1 year
NC4 Inc., NC4 Public Sector LLC, and Celerium Group
Business Acquisition [Line Items]
Date of acquisition of business	Jul. 29, 2019
NC4 Inc. and NC4 Public Sector LLC
Business Acquisition [Line Items]
Total purchase price	$ 84,500					84,493
Weighted average useful life of identified acquired intangible assets									5 years 10 months 17 days
Goodwill						40,424			$ 40,424
Business acquisition transaction costs						200			$ 200
Cash paid	$ 51,700
Number of newly issued common stock	320,998
Common stock price per share	$ 102.18
Purchase price of acquisition, cash						$ 51,655
NC4 Inc. and NC4 Public Sector LLC | Acquired Technology
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets									3 years
NC4 Inc. and NC4 Public Sector LLC | Customer Relationships
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets									7 years
NC4 Inc. and NC4 Public Sector LLC | Trade Names
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets									3 years
NC4 Inc. and NC4 Public Sector LLC | Maximum
Business Acquisition [Line Items]
Estimated useful life									7 years
NC4 Inc. and NC4 Public Sector LLC | Minimum
Business Acquisition [Line Items]
Estimated useful life									3 years
UMS
Business Acquisition [Line Items]
Date of acquisition of business					Apr. 03, 2018
Purchase price of acquisition, cash					$ 31,900
PlanetRisk, Inc.
Business Acquisition [Line Items]
Date of acquisition of business				May 01, 2018
Purchase price of acquisition, cash				$ 2,000
Respond B.V.
Business Acquisition [Line Items]
Date of acquisition of business			May 18, 2018
Total purchase price			$ 2,300
Note payable			400
Purchase price of acquisition, cash			$ 2,000
UMS, PlanetRisk, Inc. and Respond B.V.
Business Acquisition [Line Items]
Business acquisition transaction costs								$ 300		$ 600

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Revenue Recognition - Summary of Revenues Disaggregated by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation Of Revenue [Line Items]
Revenue	$ 52,547	$ 38,925	$ 143,771	$ 105,266
Subscription Services
Disaggregation Of Revenue [Line Items]
Revenue	46,385	35,998	132,043	98,327
Professional Services
Disaggregation Of Revenue [Line Items]
Revenue	$ 6,162	$ 2,927	$ 11,728	$ 6,939

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Stock Plans and Stock-Based Compensation - Performance-Based Restricted Stock Units - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 8,301	$ 3,541	$ 24,094	$ 20,257
Performance-Based Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation, number of stock unit grants in period			328,343
Stock-based compensation expense	3,100	$ 200	$ 6,700	$ 400
Unrecognized compensation expense	$ 31,800		$ 31,800
Weighted-average amortization period			2 years 1 month 20 days
Number of stock units vested			0
Performance-Based Restricted Stock Units | Tranche One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation, compounded annual growth measurement period			2 years
Share-based compensation, vesting stock percentage			50.00%
Performance-Based Restricted Stock Units | Tranche Two
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation, compounded annual growth measurement period			3 years
Performance-Based Restricted Stock Units | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation, thresholds percentage of revenue growth			20.00%
Share price	$ 54.83		$ 54.83
Performance-Based Restricted Stock Units | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation, thresholds percentage of revenue growth			40.00%
Share price	$ 98.92		$ 98.92

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Stock Plans and Stock-Based Compensation - Schedule of Stock Option Activity (Details) - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock options outstanding, Beginning Balance	1,746,073	2,440,290
Stock options outstanding, Granted		557,896
Stock options outstanding, Exercised	(851,467)	(778,370)
Stock options outstanding, Forfeited	(96,758)	(473,743)
Stock options outstanding, Ending Balance	797,848	1,746,073
Weighted average exercise price, Beginning Balance	$ 22.43	$ 16.55
Weighted average exercise price, Granted		35.01
Weighted average exercise price, Exercised	18.58	13.04
Weighted average exercise price, Forfeited	23.95	22.35
Weighted average exercise price, Ending Balance	$ 26.36	$ 22.43

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Basic and Diluted Net Loss per Share - Additional Information (Details) - Convertible Senior Notes - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Payments to enter capped call options		$ 12.9
Convertible debt Instrument, Issuance date, month and year	2017-11

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Basic and Diluted Net Loss Per Share - Schedule of Common Equivalent Shares were Excluded From Diluted Net Loss Per Share Calculation because their Inclusion would have been Anti-Dilutive (Details) - shares	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from diluted net loss per share	5,453,863	5,770,318
Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from diluted net loss per share	797,848	1,836,671
Convertible Senior Notes
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from diluted net loss per share	3,411,199	3,411,199
Non-vested Performance-Based Restricted Stock Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from diluted net loss per share	594,723	93,362
Non-vested Market-Based Restricted Stock Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from diluted net loss per share		11,877
Non-vested Restricted Stock Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from diluted net loss per share	650,093	417,209

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Leases - Summary of Additional Information Related to Leases (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Balance sheet information
ROU assets	$ 13,824
Lease liabilities, current	3,514
Lease liabilities, non-current	12,714
Total lease liabilities	$ 16,228
Supplemental data
Weighted average remaining lease term	4 years 3 months 29 days
Weighted average discount rate	7.00%
Cash paid for amounts included in lease liabilities	$ 2,648
ROU assets obtained in exchange for lease obligations	$ 17,726

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Capitalized Software Development Costs, Net - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Capitalized Computer Software Net [Abstract]
Capitalized software development costs			$ 6.3	$ 7.0
Capitalized software development costs, amortization expense	$ 1.8	$ 1.5	$ 5.1	$ 4.3

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Property and Equipment, Net - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2019	Dec. 31, 2018
Property Plant And Equipment [Line Items]
Property and equipment, gross		$ 13,368	$ 10,499
Less accumulated depreciation and amortization		(7,339)	(5,849)
Property and equipment, net		6,029	4,650
Furniture and Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross		$ 1,734	1,189
Property and equipment, useful life in years		5 years
Leasehold improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	[1]	$ 4,025	2,776
Property and equipment, useful life in years	[1]	5 years
Systems Hardware
Property Plant And Equipment [Line Items]
Property and equipment, gross		$ 1,471	1,404
Property and equipment, useful life in years		5 years
Office Computers
Property Plant And Equipment [Line Items]
Property and equipment, gross		$ 4,667	3,745
Property and equipment, useful life in years		3 years
Computer and System Software
Property Plant And Equipment [Line Items]
Property and equipment, gross		$ 1,471	$ 1,385
Property and equipment, useful life in years		3 years

[1] Lesser of the lease term or the estimated useful lives of the improvements, which may be up to 5 years.

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Stock Plans and Stock-Based Compensation - Stock Options - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 8,301	$ 3,541	$ 24,094	$ 20,257
Intrinsic value of options exercised			44,500
Intrinsic value of all outstanding options	28,200		28,200
Total unrecognized compensation cost	7,600		7,600
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 1,300	$ 700	$ 4,700	$ 4,700
Weighted-average amortization period			2 years 1 month 6 days

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Leases - Schedule of Maturities of Lease Liabilities (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Operating Lease Liabilities Payments Due [Abstract]
2019 (for the remaining three months)	$ 1,160
2020	4,487
2021	4,341
2022	4,044
2023	3,929
Thereafter	2,023
Total undiscounted lease payments	19,984
Less: imputed interest	(3,756)
Total lease liabilities	$ 16,228

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Convertible Senior Notes - Schedule of Components of Convertible Senior Notes (Details) - Convertible Senior Notes - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Nov. 30, 2017
Liability component:
Principal	$ 115,000	$ 115,000	$ 115,000
Less: debt discount, net of amortization	(17,236)	(20,903)
Net carrying amount	97,764	94,097
Equity component	$ 22,094	$ 22,094

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Convertible Senior Notes - Summary of Fair Value and Carrying Value of Convertible Senior Notes (Details) - Convertible Senior Notes - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value
Debt Instrument [Line Items]
Convertible senior notes	$ 217,947	$ 189,802
Carrying Value
Debt Instrument [Line Items]
Convertible senior notes	$ 97,764	$ 94,097

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Revenue Recognition

9 Months Ended

Sep. 30, 2019

Revenue From Contract With Customer [Abstract]

Revenue Recognition

(15) Revenue Recognition

The following table disaggregates the Company’s revenue by geography which provides information as to the major source of revenue (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
Primary Geographic Markets	2019		2018		2019		2018
United States	$	41,827	$	31,140	$	112,483	$	87,318
International		10,720		7,785		31,288		17,948
Total	$	52,547	$	38,925	$	143,771	$	105,266

The following table presents the Company’s revenues disaggregated by revenue source (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Subscription services	$	46,385	$	35,998	$	132,043	$	98,327
Professional services		6,162		2,927		11,728		6,939
Total revenues	$	52,547	$	38,925	$	143,771	$	105,266

Contract Assets

The Company does not have material amounts of contract assets since revenue is recognized as control of goods is transferred or as services are performed. There are a small number of professional services that may occur over a period of time, but that period of time is generally very short in duration. Any contract assets that may arise are recorded in other assets in the Company’s consolidated balance sheet. As of September 30, 2019, the Company had $1.6 million in receivables related to services performed which were not billed.

Contract Liabilities

The Company’s contract liabilities consist of advance payments and deferred revenue. The Company’s contract liabilities are reported in a net position on a contract-by-contract basis at the end of each reporting period. The Company classifies advance payments and deferred revenue as current or noncurrent based on the timing of when it expects to recognize revenue. Generally, all contract liabilities are expected to be recognized within one year and are included in deferred revenue in the Company’s consolidated balance sheet. The noncurrent portion of deferred revenue is included and separately disclosed in the Company’s consolidated balance sheet.

Deferred Costs

Current deferred costs, which primarily consist of deferred sales commissions, were $7.7 million and $6.5 million as of September 30, 2019 and December 31, 2018, respectively. Noncurrent deferred costs, which primarily consist of deferred sales commissions, were $12.0 million and $10.3 million as of September 30, 2019 and December 31, 2018, respectively. During the three months ended September 30, 2019 and 2018, amortization expense for the deferred costs was $1.9 million and $1.4 million, respectively. During the nine months ended September 30, 2019 and 2018, amortization expense for the deferred costs was $5.5 million and $3.9 million, respectively. There was no impairment loss in relation to the costs capitalized for the three and nine months ended September 30, 2019 and the year ended December 31, 2018, respectively.

Deferred Revenue

$36.9 million and $77.0 million of subscription services revenue was recognized during the three and nine months ended September 30, 2019 and was included in the deferred revenue balances at the beginning of the respective period. $4.1 million and $5.2 million of professional services revenue was recognized during the three and nine months ended September 30, 2019 and was included in the deferred revenue balances at the beginning of the respective period.

As of September 30, 2019, approximately $250.9 million of revenue is expected to be recognized from remaining performance obligations for subscription contracts.        

The Company expects to recognize revenue on approximately $138.8 million of these remaining performance obligations over the next 12 months, with the balance recognized thereafter.

As of September 30, 2019, approximately $12.2 million of revenue is expected to be recognized from remaining performance obligations for professional services contracts. The Company expects to recognize revenue on approximately $8.7 million of these remaining performance obligations over the next 12 months, with the balance recognized thereafter.

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018.

The condensed consolidated balance sheet as of December 31, 2018, included herein, was derived from the audited financial statements as of that date, but does not include all disclosures including certain notes required by GAAP on an annual reporting basis. In order to conform to the current year’s presentation, current Deferred costs of $6.5 million and noncurrent Deferred costs of $10.3 million as of December 31, 2018 are reported in Deferred costs and other current assets and Deferred costs and other assets, respectively, with no effect on Total current assets or Total assets, respectively.

In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss, statements of stockholders’ equity and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full year 2019 or any future period.

Effective January 1, 2019, the Company adopted the requirements of Accounting Standards Update (“ASU”) No. 2016-02, Leases, as discussed in this Note 2 and Note 16.

Principles of Consolidation

Principles of Consolidation

The condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated.

Use of Estimates

Use of Estimates

The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements, and the reported amount of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Assets and liabilities which are subject to judgment and use of estimates include the determination of the period of benefit for deferred commissions, allowances for doubtful accounts, the fair value of assets acquired and liabilities assumed in business combinations, the recoverability of goodwill and long-lived assets, valuation allowances with respect to deferred tax assets, useful lives associated with property and equipment and intangible assets, contingencies, and the valuation and assumptions underlying stock-based compensation. On an ongoing basis, the Company evaluates its estimates compared to historical experience and trends, which form the basis for making judgments about the carrying value of assets and liabilities. In addition, the Company engages valuation specialists to assist with management’s determination of the valuation of its fair values of assets acquired and liabilities assumed in business combinations and certain market-based performance equity awards.

Concentrations of Credit and Business Risk

Concentrations of Credit and Business Risk

Financial instruments that potentially subject the Company to a concentration of credit risk consist of cash and cash equivalents and accounts receivable.

The Company maintains cash balances at several banks. Accounts located in the United States are insured by the Federal Deposit Insurance Corporation (“FDIC”) up to $250,000. From time to time, balances may exceed amounts insured by the FDIC. The Company has not experienced any losses in such amounts.

The Company’s accounts receivable are generally unsecured and are derived from revenue earned from customers primarily located in the United States, Norway, Sweden and the United Kingdom and are generally denominated in U.S. dollars, Norwegian Krone, Swedish Kronor or British Pounds. Each reporting period, the Company reevaluates each customer’s ability to satisfy credit obligations and maintains an allowance for doubtful accounts based on the evaluations. No single customer comprised more than 10% of the Company’s total revenue for the three and nine months ended September 30, 2019 and 2018. No single customer comprised more than 10% of the Company’s total accounts receivable as of September 30, 2019 and 2018.   

Cash and Cash Equivalents

The Company considers all highly liquid instruments with original maturities of three months or less at the date of purchase to be cash equivalents. Cash and cash equivalents are recorded at cost, which approximates fair value. As of September 30, 2019, $174.8 million of the Company’s cash equivalents were invested in money market funds.

Restricted Cash

Restricted Cash

The Company’s restricted cash balance primarily consist of cash held at a financial institution for collateral against performance on the Company’s customer contracts and certain other cash deposits for specific purposes.

Short-Term Investments

Short-Term Investments

Short-term investments consist of highly liquid investments, primarily commercial paper, U.S. Treasury and U.S. agency securities, with maturities over three months from the date of purchase and less than 12 months from the date of the balance sheet. Debt securities, money market funds and U.S. agency bonds that the Company has the ability and positive intent to hold to maturity are carried at amortized cost, which approximates fair value. There were no short-term investments at September 30, 2019. Short-term investments of $45.5 million at December 31, 2018 were classified as held-to-maturity and primarily comprised of U.S. treasury and U.S. government and agency securities. All held-to-maturity securities have maturity dates within one year.

Significant Accounting Policies

Significant Accounting Policies

Except for the accounting policies for leases that were updated, as set forth below, as a result of adopting ASU No. 2016-02, there have been no changes to the Company’s significant accounting policies described in the Annual Report on Form 10-K for the year ended December 31, 2018 filed with the SEC on March 1, 2019, that have had a material impact on the Company’s condensed consolidated financial statements and related notes.

Revenue Recognition

Revenue Recognition

The Company derives its revenues primarily from subscription services and professional services. Revenues are recognized when control of these services is transferred to the Company’s customers in an amount that reflects the consideration it expects to be entitled to in exchange for those services.

The Company determines revenue recognition through the following steps:

• Identification of the contract, or contracts, with a customer

• Identification of the performance obligations in the contract

• Determination of the transaction price

• Allocation of the transaction price to the performance obligations in the contract

• Recognition of revenue when, or as, the Company satisfies a performance obligation

Subscription Services Revenues

Subscription services revenues primarily consist of fees that provide customers access to one or more of the Company’s hosted applications for critical event management, with routine customer support. Revenue is generally recognized over time on a ratable

basis over the contract term beginning on the date that the Company’s service is made available to the customer. All services are recognized using an output measure of progress looking at time elapsed as the contract generally provides the customer equal benefit throughout the contract period. The Company’s subscription contracts are generally two years or longer in length, billed annually in advance, and non-cancelable.

Professional Services Revenues

Professional services revenues primarily consist of fees for deployment and optimization services, as well as training. The majority of the Company’s consulting contracts revenue is recognized over time as the services are performed. For contracts billed on a fixed price basis, revenue is recognized over time based on the proportion performed.

Software License Revenues

On occasion we may sell software and related post contract support for on premise usage which is outside of our core business. These sales have been to a limited number of customers and is not a significant revenue stream for the Company.

Contracts with Multiple Performance Obligations

Some of the Company’s contracts with customers contain multiple performance obligations. For these contracts, the Company accounts for individual performance obligations separately if they are distinct. The transaction price is allocated to the separate performance obligations on a relative standalone selling price basis for those performance obligations with stable observable prices and then the residual method applied for any performance obligation that has pricing, which is highly variable. The Company determines the standalone selling prices based on the Company’s overall pricing objectives, taking into consideration market conditions and other factors, including the value of the Company’s contracts, the applications sold, customer demographics, geographic locations, and the number and types of users within the Company’s contracts.

Returns

The Company does not offer rights of return for its products and services in the normal course of business. 

Customer Acceptance

The Company’s contracts with customers generally do not include customer acceptance clauses.

Trade and Other Receivables

Trade and Other Receivables

Trade and other receivables are primarily comprised of trade receivables that are recorded at the invoice amount, net of an allowance for doubtful accounts, which is not material. Other receivables represent unbilled receivables related to subscription and professional services contracts.

Deferred Costs

Deferred Costs

Sales commissions earned by the Company’s sales force are considered incremental and recoverable costs of obtaining a contract with a customer. These costs are deferred and then amortized on a straight-line basis over a period of benefit that the Company has determined to be four years. The Company has determined the period of benefit by taking into consideration its customer contracts, its technology and other factors. Sales commissions attributed to renewals are not material and are not commensurate with initial and growth sales. Amortization of deferred commissions is included in sales and marketing expenses in the accompanying condensed consolidated statements of operations.

Deferred Revenue

Deferred Revenue

Deferred revenue consists of amounts that have been invoiced and for which the Company has the right to bill, but that have not been recognized as revenue because the related goods or services have not been transferred. Deferred revenue that will be realized during the succeeding 12-month period is recorded as current, and the remaining deferred revenue is recorded as non-current.

In instances where the timing of revenue recognition differs from the timing of invoicing, the Company has determined its contracts generally do not include a significant financing component. The primary purpose of the Company’s invoicing terms is to provide customers with simplified and predictable ways of purchasing the Company’s products and services, not to receive financing from its customers or to provide customers with financing. Examples include invoicing at the beginning of a subscription term with revenue recognized ratably over the contract period.

Recently Adopted Accounting Pronouncements

Recently Adopted Accounting Pronouncements

ASU No. 2016-02

In February 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-02, Leases (Topic 842), to require lessees to recognize most leases on the balance sheet, while recognition on the statement of operations will remain similar to current lease accounting. The ASU requires lessees to recognize a liability for lease obligations, which represents the discounted obligation to make future lease payments, and a corresponding right-of-use (“ROU”) asset on the balance sheet. The guidance requires disclosure of key information about leasing arrangements that is intended to give financial statement users the ability to assess the amount, timing and potential uncertainty of cash flows related to leases. The ASU also eliminates real estate-specific provisions and modifies certain aspects of lessor accounting.

The Company adopted the standard on January 1, 2019 using the modified retrospective approach. The Company elected to apply the transition method that allows companies to continue applying the guidance under the lease standard in effect at that time in the comparative periods presented in the consolidated financial statements and recognize a cumulative-effect adjustment to the opening balance of retained earnings on the date of adoption. The Company also elected the “package of practical expedients”, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs.

Results for reporting periods beginning after January 1, 2019 are presented under the new standard, while prior period amounts are not adjusted and continue to be reported under the accounting standards in effect for the prior period. Upon adoption of the new lease standard, on January 1, 2019, the Company capitalized ROU assets of $14.7 million and $16.9 million of lease liabilities, within the Company’s condensed consolidated balance sheets upon adoption. Additionally, the Company reversed its deferred rent liability of $2.2 million, which upon adoption became a component of the right-of-use asset. The adoption of this standard did not have an impact on the Company’s condensed consolidated statement of operations or cash flows and did not result in a cumulative catch-up adjustment to the opening balance of retained earnings.

ASU No. 2018-02

In February 2018, the FASB issued ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The amendments in this update allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the U.S. Tax Cuts and Jobs Act of 2017. The new standard is effective for the Company beginning on January 1, 2019, with early adoption permitted. The Company adopted ASU 2018-02 effective January 1, 2019. The adoption of this standard did not have an impact on the Company’s condensed consolidated financial statements.

ASU No. 2018-07

In June 2018, the FASB issued ASU 2018-07, Improvements to Nonemployee Share Based Payments. The improvement expands stock-based compensation guidance to include share-based payment transactions for acquiring goods and services from nonemployees. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2018. The new standard is effective for the Company beginning on January 1, 2019, with early adoption permitted. The Company adopted ASU 2018-07 effective January 1, 2019. The adoption of this standard did not have an impact on our condensed consolidated financial statements.

Recently Issued Accounting Guidance Not Yet Adopted

ASU 2016-13

In June 2016, the FASB issued ASU 2016-13 (as amended through May 2019), Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 introduces a new forward-looking approach, based on expected losses, to estimate credit losses on certain types of financial instruments, including trade receivables and held-to-maturity debt securities, which will require entities to incorporate considerations of historical information, current information and reasonable and supportable forecasts. This ASU also expands disclosure requirements. ASU 2016-13 is effective for the Company beginning in the first quarter of 2020 and early adoption is permitted. The guidance will be applied using the modified-retrospective approach. The Company is currently assessing the impact this standard will have on the Company’s consolidated financial statements.

ASU 2018-13

In August 2018, the FASB issued ASU 2018-13, Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurements, which eliminates, adds and modifies certain disclosure requirements for fair value measurements as part of the FASB’s disclosure framework project. Adoption of this guidance is required for fiscal years and interim periods within those fiscal years, beginning after December 15, 2019. The Company is currently assessing the impact this standard will have on the Company’s consolidated financial statements.

ASU 2018-15

In August 2018, the FASB issued ASU 2018-15, Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, a new standard on a customer's accounting for implementation, set-up, and other upfront costs incurred in a cloud computing arrangement (“CCA”). Under the new guidance, customers will assess if a CCA includes a software license and if a CCA does include a software license, implementation and set-up costs will be accounted for consistent with existing internal-use software implementation guidance. Implementation costs associated with a CCA that do not include a software license would be expensed to operating expenses. The standard also provides classification guidance on these implementation costs as well as additional quantitative and qualitative disclosures. The standard is effective for public business entities for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption is permitted, including adoption in any interim period. Entities can choose to adopt the new guidance prospectively or retrospectively. The Company is currently assessing the impact this standard will have on the Company’s consolidated financial statements.

Other accounting standard updates effective for interim and annual periods beginning after December 31, 2018 are not expected to have a material impact on the Company’s financial position, results of operations or cash flows.

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Accounts Receivable, Net - Schedule of Accounts Receivable Net (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Accounts Receivable Net [Abstract]
Accounts receivable	$ 52,980		$ 41,818
Allowance for doubtful accounts	(1,156)	$ (1,051)	(711)	$ (820)	$ (716)	$ (863)
Net accounts receivable	$ 51,824		$ 41,107

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Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Revenue	$ 52,547	$ 38,925	$ 143,771	$ 105,266
Cost of revenue	16,454	12,296	45,174	33,488
Gross profit	36,093	26,629	98,597	71,778
Operating expenses:
Sales and marketing	21,903	16,348	63,989	51,303
Research and development	12,877	10,350	37,164	30,548
General and administrative	13,435	7,130	34,457	23,609
Total operating expenses	48,215	33,828	135,610	105,460
Operating loss	(12,122)	(7,199)	(37,013)	(33,682)
Other income (expense), net:
Interest and investment income	1,032	460	3,541	1,316
Interest expense	(1,697)	(1,592)	(4,986)	(4,736)
Other expense, net	(35)	(33)	(129)	(237)
Total other income (expense), net	(700)	(1,165)	(1,574)	(3,657)
Loss before income taxes	(12,822)	(8,364)	(38,587)	(37,339)
Provision for income taxes	(99)	(86)	(531)	(371)
Net loss	$ (12,921)	$ (8,450)	$ (39,118)	$ (37,710)
Net loss per share attributable to common stockholders:
Basic	$ (0.39)	$ (0.29)	$ (1.19)	$ (1.30)
Diluted	$ (0.39)	$ (0.29)	$ (1.19)	$ (1.30)
Weighted-average common shares outstanding:
Basic	33,524,771	29,460,156	32,941,826	28,918,304
Diluted	33,524,771	29,460,156	32,941,826	28,918,304

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Basic and Diluted Net Loss Per Share (Tables)

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Schedule of Common Equivalent Shares were Excluded From Diluted Net Loss Per Share Calculation because their Inclusion would have been Anti-Dilutive

The following common equivalent shares were excluded from the diluted net loss per share calculation because their inclusion would have been anti-dilutive:

	As of September 30,
	2019		2018
Stock options		797,848		1,836,671
Convertible senior notes		3,411,199		3,411,199
Non-vested performance-based restricted stock units		594,723		93,362
Non-vested market-based restricted stock units		—		11,877
Non-vested restricted stock units		650,093		417,209
Total		5,453,863		5,770,318

Schedule of Common Stock Reserved

The amount of such shares of the Company’s common stock reserved for these purposes at September 30, 2019 is as follows:

	Number of Shares
Stock options issued and outstanding		797,848
Additional shares available for grant under equity plans		2,394,561
Total		3,192,409

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Business and Nature of Operations

9 Months Ended

Sep. 30, 2019

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Business and Nature of Operations

(1) Business and Nature of Operations

Everbridge, Inc., a Delaware corporation (together with its wholly-owned subsidiaries, referred to as “Everbridge” or the “Company”), is a global software company that provides enterprise software applications that automate and accelerate organizations’ operational response to critical events in order to keep people safe and businesses running. The Company’s SaaS-based platform enables the Company’s customers to quickly and reliably deliver messaging to a large group of people during critical situations. The Company’s enterprise applications, such as Mass Notification, Incident Management, Safety Connection, IT Alerting, Visual Command Center, Public Warning, Crisis Management, Community Engagement and Secure Messaging, automate numerous critical event management processes. The Company generates revenue primarily from subscription fees to the Company’s enterprise applications. The Company has operations in the United States, Norway, India, the Netherlands, Sweden, England, Germany and China.

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Goodwill and Intangible Assets, Net (Tables)

9 Months Ended

Sep. 30, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Changes in Gross Carrying Amount of Goodwill

The following table displays the changes in the gross carrying amount of goodwill (in thousands):

Balance at December 31, 2018	$	48,382
Foreign currency translation		(1,018	)
Increase due to acquisitions		43,342
Balance at September 30, 2019	$	90,706

Schedule of Intangible Assets

Intangible assets consisted of the following (in thousands):

				As of September 30, 2019
	Gross carrying amount		Weighted average life (years)	Accumulated amortization			Net carrying amount
Amortizable intangible assets:
Developed technology	$	9,436	3.00	$	(3,412	)	$	6,024
Tradenames		11,452	3.48		(1,940	)		9,512
Non-compete		240	2.00		(240	)		—
Customer relationships		63,119	6.84		(8,031	)		55,088
Total intangible assets	$	84,247		$	(13,623	)	$	70,624

				As of December 31, 2018
	Gross carrying amount		Weighted average life (years)	Accumulated amortization			Net carrying amount
Amortizable intangible assets:
Developed technology	$	5,090	3.04	$	(3,225	)	$	1,865
Tradenames		3,193	4.51		(1,526	)		1,667
Non-compete		240	2.00		(230	)		10
Customer relationships		26,990	6.39		(7,335	)		19,655
Total intangible assets	$	35,513		$	(12,316	)	$	23,197

Schedule of Expected Amortization of Intangible Assets

The expected amortization of the intangible assets, as of September 30, 2019, for each of the next five years and thereafter is as follows (in thousands):

2019 (for the remaining three months)	$	4,015
2020		14,786
2021		14,410
2022		11,200
2023		8,367
Thereafter		17,846
	$	70,624

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Capitalized Software Development Costs, Net

9 Months Ended

Sep. 30, 2019

Research And Development [Abstract]

Capitalized Software Development Costs, Net

(5) Capitalized Software Development Costs, Net

Capitalized software development costs consisted of the following (in thousands):

				As of September 30, 2019
	Gross carrying amount		Amortization period	Accumulated amortization			Net carrying amount
Capitalized software development costs	$	47,820	3 years	$	(33,728	)	$	14,092
Total capitalized software development costs	$	47,820		$	(33,728	)	$	14,092

				As of December 31, 2018
	Gross carrying amount		Amortization period	Accumulated amortization			Net carrying amount
Capitalized software development costs	$	45,677	3 years	$	(32,784	)	$	12,893
Total capitalized software development costs	$	45,677		$	(32,784	)	$	12,893

The Company capitalized software development costs of $6.3 million and $7.0 million for the nine months ended September 30, 2019 and 2018, respectively.   

Amortization expense for capitalized software development costs was $1.8 million and $1.5 million for the three months ended September 30, 2019 and 2018, respectively. Amortization expense for capitalized software development was $5.1 million and $4.3 million for the nine months ended September 30, 2019 and 2018, respectively. Amortization of capitalized software development costs is classified within cost of revenue in the consolidated statements of operations.

The expected amortization of capitalized software development costs, as of September 30, 2019, for each of the following years is as follows (in thousands):

2019 (for the remaining three months)	$	2,144
2020		6,459
2021		3,963
2022		1,526
	$	14,092

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Convertible Senior Notes

9 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Convertible Senior Notes

(9) Convertible Senior Notes

In November 2017, the Company issued $115.0 million aggregate principal amount of 1.50% convertible senior notes (the “Notes”) due November 1, 2022, unless earlier repurchased by the Company or converted by the holder pursuant to their terms. Interest is payable semiannually in arrears on May 1 and November 1 of each year, commencing on May 1, 2018.

The Notes are governed by an Indenture between the Company, as issuer, and U.S. Bank, National Association, as trustee. The Notes are unsecured and rank: senior in right of payment to the Company’s future indebtedness that is expressly subordinated in right of payment to the Notes; equal in right of payment to the Company’s existing and future indebtedness that is not so subordinated; effectively subordinated in right of payment to any of the Company’s secured indebtedness to the extent of the value of the assets securing such indebtedness; and structurally subordinated to all existing and future indebtedness and other liabilities incurred by the Company’s subsidiaries.

Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of the Company’s common stock or a combination of cash and shares of common stock, at the Company’s election. The Company’s current intention is to settle the conversion in shares of common stock if a conversion were to occur.

The Notes have an initial conversion rate of 29.6626 shares of common stock per $1,000 principal amount of Notes. This represents an initial effective conversion price of approximately $33.71 per share of common stock and approximately 3.4 million shares issuable upon conversion. Throughout the term of the Notes, the conversion rate may be adjusted upon the occurrence of certain events. Holders of the Notes will not receive any cash payment representing accrued and unpaid interest, if any, upon conversion of a Note, except in limited circumstances. Accrued but unpaid interest will be deemed to be paid by cash, shares of the Company’s common stock or a combination of cash and shares of the Company’s common stock paid or delivered, as the case may be, to the holder upon conversion of a Note.

Prior to the close of business on the business day immediately preceding May 1, 2022, the Notes will be convertible at the option of holders during certain periods, only upon satisfaction of certain conditions set forth below. On or after May 1, 2022, until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their Notes at the conversion rate at any time regardless of whether the conditions set forth below have been met.

Holders may convert all or a portion of their Notes prior to the close of business on the business day immediately preceding May 1, 2022, in multiples of $1,000 principal amount, only under the following circumstances:

• during any calendar quarter commencing after the calendar quarter ending on March 31, 2018 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day;

• during the five business day period after any five consecutive trading day period (the “Notes Measurement Period”) in which the “trading price” (as the term is defined in the Indenture) per $1,000 principal amount of notes for each trading day of such Notes Measurement Period was less than 98% of the product of the last reported sale price of the Company’s common stock on such trading day and the conversion rate on each such trading day;

• If the Company calls any or all of the notes for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the maturity date; or

• upon the occurrence of specified corporate events.

Based on the market price of the Company’s common stock during the 30 trading days preceding June 30, 2018, the Notes are convertible at the option of the debt holder as of September 30, 2018. No debt holders have exercised their right for conversion as of September 30, 2019. The Notes are classified as long-term on the consolidated balance sheet as of September 30, 2019 as it is the Company’s intent to settle all of the debt at maturity or to settle in shares if exercised by the debt holder prior to maturity.

Based on market data available for publicly traded, senior, unsecured corporate bonds issued by companies in the same industry and with similar maturity, the Company estimated the implied interest rate of its Notes to be approximately 6.93%, assuming no conversion option. Assumptions used in the estimate represent what market participants would use in pricing the equity component, including market interest rates, credit standing, and yield curves, all of which are defined as Level 2 observable inputs. The estimated implied interest rate was applied to the Notes, which resulted in a fair value of the liability component of $92.1 million upon issuance, calculated as the present value of implied future payments based on the $115.0 million aggregate principal amount. The excess of the principal amount of the liability component over its carrying amount, or the debt discount, is amortized to interest expense over the term of the Notes. The $22.9 million difference between the aggregate principal amount of $115.0 million and the estimated fair value of the liability component was recorded in additional paid-in capital as the Notes were not considered redeemable.

The Notes consist of the following (in thousands):

	As of September 30, 2019			As of December 31, 2018
Liability component:
Principal	$	115,000		$	115,000
Less: debt discount, net of amortization		(17,236	)		(20,903	)
Net carrying amount	$	97,764		$	94,097
Equity component (1)		22,094			22,094

⁽¹⁾ Recorded in the consolidated balance sheet within additional paid-in capital, net of $0.8 million transaction costs in equity as of December 31, 2017.

The following table sets forth total interest expense recognized related to the Notes (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
1.50% coupon	$	429	$	432	$	1,294	$	1,301
Amortization of debt discount and transaction costs		1,243		1,160		3,667		3,435
	$	1,672	$	1,592	$	4,961	$	4,736

As of September 30, 2019 and December 31, 2018, the fair value of the Notes, which was determined based on inputs that are observable in the market or that could be derived from, or corroborated with, observable market data, quoted price of the Notes in an over-the-counter market (Level 2), and carrying value of debt instruments (carrying value excludes the equity component of the Company’s convertible notes classified in equity) were as follows (in thousands):

	As of September 30, 2019				As of December 31, 2018
	Fair Value		Carrying Value		Fair Value		Carrying Value
Convertible senior notes	$	217,947	$	97,764	$	189,802	$	94,097

In connection with the issuance of the Notes, the Company entered into capped call transactions with certain counterparties affiliated with the initial purchasers and others. The capped call transactions are expected to reduce potential dilution of earnings per share upon conversion of the Notes. Under the capped call transactions, the Company purchased capped call options that in the aggregate relate to the total number of shares of the Company’s common stock underlying the Notes, with an initial strike price of approximately $33.71 per share, which corresponds to the initial conversion price of the Notes and is subject to anti-dilution adjustments substantially similar to those applicable to the conversion rate of the Notes, and have a cap price of approximately $47.20. The cost of the purchased capped calls of $12.9 million was recorded to shareholders’ equity as of December 31, 2018 and will not be re-measured.

Based on the closing price of the Company’s common stock of $61.71 on September 30, 2019, the if-converted value of the Notes was more than their respective principal amounts.

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Revenue Recognition - Remaining Performance Obligations - Additional Information (Details 1) $ in Millions	Sep. 30, 2019 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-10-01
Disaggregation Of Revenue [Line Items]
Revenue remaining performance obligation	$ 138.8
Remaining performance obligation recognition period	12 months
Professional Services
Disaggregation Of Revenue [Line Items]
Revenue remaining performance obligation	$ 12.2
Professional Services | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-10-01
Disaggregation Of Revenue [Line Items]
Revenue remaining performance obligation	$ 8.7
Remaining performance obligation recognition period	12 months

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Stock Plans and Stock-Based Compensation - Summary of Activity in Connection with RSUs, Market-based RSUs and RSUs (Details) - Restricted Stock Units, Market-based RSUs and Performance-based RSUs	9 Months Ended
	Sep. 30, 2019 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Outstanding, Beginning Balance	904,033
Number of Shares, Granted	687,817
Number of Shares, Vested	(271,853)
Number of Shares, Forfeited	(75,181)
Number of Shares, Outstanding, Ending Balance	1,244,816

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Stock Plans and Stock-Based Compensation - Schedule of Vested and Nonvested Stock Option Activity (Details) - $ / shares	Sep. 30, 2019	Dec. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Options outstanding, Vested	222,219	579,319
Weighted average exercise price, Vested	$ 18.21	$ 8.13
Options outstanding, Nonvested	575,629	1,166,754
Weighted average exercise price, Nonvested	$ 29.50	$ 26.58

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Segment Information - Additional Information (Details)	9 Months Ended
	Sep. 30, 2019 Segment
Segment Reporting [Abstract]
Number of operating segment	1

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Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Money Market Funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	$ 174,800,000
Fair Value Measurements, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total financial assets	174,819,000	$ 95,071,000
Contingent consideration	550,000
Total financial liabilities	550,000
Fair Value Measurements, Recurring | Money Market Funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	174,819,000	47,258,000
Fair Value Measurements, Recurring | U.S. Treasury Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Short-term investments		38,809,000
Fair Value Measurements, Recurring | U.S. Government and Agency Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents		2,272,000
Short-term investments		6,732,000
Fair Value Measurements, Recurring | Quoted Prices in Active Markets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total financial assets	174,819,000	47,258,000
Fair Value Measurements, Recurring | Quoted Prices in Active Markets (Level 1) | Money Market Funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	174,819,000	47,258,000
Fair Value Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total financial assets	0	47,813,000
Total financial liabilities	0
Fair Value Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. Treasury Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Short-term investments		38,809,000
Fair Value Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. Government and Agency Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents		2,272,000
Short-term investments		$ 6,732,000
Fair Value Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contingent consideration	550,000
Total financial liabilities	$ 550,000

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Goodwill and Intangible Assets, Net - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 84,247	$ 35,513
Accumulated amortization	(13,623)	(12,316)
Net carrying amount	70,624	23,197
Developed Technology
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	9,436	5,090
Accumulated amortization	(3,412)	(3,225)
Net carrying amount	$ 6,024	$ 1,865
Developed Technology | Weighted-Average
Finite Lived Intangible Assets [Line Items]
Weighted average life (years)	3 years	3 years 14 days
Tradenames
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 11,452	$ 3,193
Accumulated amortization	(1,940)	(1,526)
Net carrying amount	$ 9,512	$ 1,667
Tradenames | Weighted-Average
Finite Lived Intangible Assets [Line Items]
Weighted average life (years)	3 years 5 months 23 days	4 years 6 months 3 days
Non-compete
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 240	$ 240
Accumulated amortization	$ (240)	(230)
Net carrying amount		$ 10
Non-compete | Weighted-Average
Finite Lived Intangible Assets [Line Items]
Weighted average life (years)	2 years	2 years
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 63,119	$ 26,990
Accumulated amortization	(8,031)	(7,335)
Net carrying amount	$ 55,088	$ 19,655
Customer Relationships | Weighted-Average
Finite Lived Intangible Assets [Line Items]
Weighted average life (years)	6 years 10 months 2 days	6 years 4 months 20 days

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Acquisitions - Summary of Unaudited Pro Forma Results of Operations (Details) - NC4 Inc. and NC4 Public Sector LLC - USD ($) $ / shares in Units, $ in Thousands	2 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Business Acquisition [Line Items]
Revenue from the acquisition date	$ 2,040
Net loss from the acquisition date	$ (1,465)
Revenue, pro forma		$ 54,352	$ 43,037	$ 154,719	$ 116,838
Net loss, pro forma		$ (13,387)	$ (11,543)	$ (45,875)	$ (48,652)
Basic and diluted loss per share pro forma		$ (0.40)	$ (0.39)	$ (1.38)	$ (1.66)

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Leases - Schedule of Future Minimum Lease Payments Under Noncancelable Operating Leases Including Short Term Leases (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Future minimum lease payments
2019 (for the remaining three months)	$ 1,221
2020	4,612
2021	4,341
2022	4,044
2023	3,929
Thereafter	2,023
Total minimum lease payments	$ 20,170

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Convertible Senior Notes - Summary of Total Interest Expense Recognized Related To Convertible Senior Notes (Details) - Convertible Senior Notes - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Debt Instrument [Line Items]
Amortization of debt discount and transaction costs	$ 1,243	$ 1,160	$ 3,667	$ 3,435
Total interest expense	1,672	1,592	4,961	4,736
1.50% Coupon
Debt Instrument [Line Items]
Interest expense	$ 429	$ 432	$ 1,294	$ 1,301

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Stock Plans and Stock-Based Compensation - Additional Information (Details) - shares	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018	Sep. 15, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for issuance	3,192,409
Stock option granted during period		557,896
2016 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for issuance			3,893,118
Automatic increase percentage			3.00%
2016 Equity Incentive Plan | Tranche One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for issuance			2,000,000
2008 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options vesting period	4 years
Stock options expiration period	10 years
Stock option granted during period	0
2008 Equity Incentive Plan | Tranche Two | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for issuance			42,934
2008 Equity Incentive Plan | Tranche Three | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for issuance			1,850,184

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Fair Value Measurements - Additional Information (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair value of assets transferred from level 1 to level 2	$ 0
Fair value of assets transferred from level 2 to level 1	0
Fair value of convertible senior notes	217,900,000	$ 189,800,000
Carrying value of convertible senior notes	97,764,000	94,097,000
Fair Value Measurements, Nonrecurring
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Asset impairment charges	0	0
Fair Value Measurements, Recurring
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Financial assets	174,819,000	95,071,000
Financial liabilities	550,000
Fair Value Measurements, Recurring | Level 2 Securities
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Financial assets	0	$ 47,813,000
Financial liabilities	$ 0

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Property and Equipment, Net - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Property Plant And Equipment [Abstract]
Depreciation and amortization expense	$ 0.6	$ 0.5	$ 1.7	$ 1.4

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Accounts Receivable, Net - Schedule of Changes in Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accounts Receivable Net [Abstract]
Balance, beginning of period	$ (1,051)	$ (716)	$ (711)	$ (863)
Additions	(253)	(134)	(642)	(25)
Write-offs	148	30	197	68
Balance, end of period	$ (1,156)	$ (820)	$ (1,156)	$ (820)

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Income Taxes

9 Months Ended

Sep. 30, 2019

Income Tax Disclosure [Abstract]

Income Taxes

(13) Income Taxes

The Company is subject to income tax in the United States as well as other tax jurisdictions in which it conducts business. Earnings from non-U.S. activities are subject to local country income tax. The Company does not provide for U.S. deferred income taxes on the undistributed earnings of its foreign subsidiaries as such earnings are reinvested indefinitely.

The Company’s tax provision for interim periods is determined using an estimate of its annual effective tax rate, adjusted for discrete items arising in that quarter. In each quarter, the Company updates its estimate of the annual effective tax rate, and if the estimated annual tax rate changes, the Company makes a cumulative adjustment in that quarter. The Company’s quarterly tax provision, and its quarterly estimate of its annual effective tax rate, are subject to significant volatility due to several factors, including the Company’s ability to accurately predict its pre-tax income and loss in multiple jurisdictions.

For the three months ended September 30, 2019 and 2018, the Company recorded a provision for income taxes of $0.1 million and $0.1 million, respectively, resulting in an effective tax rate of 0.77% and 1.03%, respectively. For the nine months ended September 30, 2019 and 2018, the Company recorded a provision for income taxes of $0.5 million and $0.4 million, respectively, resulting in an effective tax rate of 1.38% and 0.99%, respectively. During the current year periods, the effective tax rate is lower than the statutory federal tax rate as the Company was not able to benefit from its net operating losses due to its full valuation allowance.

As of September 30, 2019, the Company had gross tax-effected unrecognized tax provision of $0.6 million, of which $0.6 million, if recognized, would favorably impact the effective tax rate. The Company’s existing tax positions will continue to generate an increase in unrecognized tax benefits in subsequent periods. The Company’s policy is to record interest and penalties related to unrecognized tax benefits as income tax expense. During the three and nine months ended September 30, 2019 and 2018, the amounts recorded related to the accrual of interest and penalties were immaterial in each period.  

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2019

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

(17) Commitments and Contingencies

Litigation

From time to time the Company may become involved in legal proceedings or be subject to claims arising in the ordinary course of business. Although the results of litigation and claims cannot be predicted with certainty, the Company currently believes that the final outcome of these ordinary course matters will not have a material adverse effect on its business, operating results, financial condition or cash flows. Regardless of the outcome, litigation can have an adverse impact because of defense and settlement costs, diversion of management resources and other factors.

Employee Contracts

The Company has entered into employment contracts with certain of the Company’s executive officers which provide for at-will employment. However, under the provisions of the contracts, the Company would incur severance obligations of up to twelve months of the executive’s annual base salary for certain events, such as involuntary terminations.

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Property and Equipment, Net (Tables)

9 Months Ended

Sep. 30, 2019

Property Plant And Equipment [Abstract]

Schedule of Property and Equipment, Net

Property and equipment consisted of the following (in thousands):

	Useful life in years		As of September 30, 2019			As of December 31, 2018
Furniture and equipment		5	$	1,734		$	1,189
Leasehold improvements (1)		5		4,025			2,776
System hardware		5		1,471			1,404
Office computers		3		4,667			3,745
Computer and system software		3		1,471			1,385
				13,368			10,499
Less accumulated depreciation and amortization				(7,339	)		(5,849	)
Property and equipment, net			$	6,029		$	4,650

⁽¹⁾ Lesser of the lease term or the estimated useful lives of the improvements, which may be up to 5 years.

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Convertible Senior Notes - Summary of Total Interest Expense Recognized Related To Convertible Senior Notes (Parenthetical) (Details) - Convertible Senior Notes	Sep. 30, 2019	Sep. 30, 2018	Nov. 30, 2017
Debt Instrument [Line Items]
Debt instrument, interest rate			1.50%
1.50% Coupon
Debt Instrument [Line Items]
Debt instrument, interest rate	1.50%	1.50%

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Stock Plans and Stock-Based Compensation - 2016 Employee Stock Purchase Plan - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Sep. 15, 2016	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for issuance		3,192,409		3,192,409
Stock-based compensation expense		$ 8,301	$ 3,541	$ 24,094	$ 20,257
2016 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for issuance	500,000
Purchase price as percentage of fair market value of common stock	85.00%
Shares purchased under the plan				42,481	74,517
Stock-based compensation expense		$ 200	$ 200	$ 700	$ 500
2016 Employee Stock Purchase Plan | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Increase in number of shares reserved and available for issuance	200,000
2016 Employee Stock Purchase Plan | Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Increase in number of shares reserved and available for issuance, percentage	1.00%
2016 Employee Stock Purchase Plan | Common Stock | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Purchase price, discount percentage	15.00%

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Property and Equipment, Net - Schedule of Property and Equipment (Parenthetical) (Details) - Leasehold improvements	9 Months Ended
	Sep. 30, 2019
Property Plant And Equipment [Line Items]
Property and equipment, useful life in years	5 years	[1]
Maximum
Property Plant And Equipment [Line Items]
Lease term	5 years
Property and equipment, useful life in years	5 years

[1] Lesser of the lease term or the estimated useful lives of the improvements, which may be up to 5 years.

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Accounts Receivable, Net - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accounts Receivable Net [Abstract]
Bad debt expense	$ 0.3	$ 0.1	$ 0.6	$ 0.1

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Capitalized Software Development Costs, Net - Schedule of Expected Amortization of Capitalized Software Development Costs (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Capitalized Computer Software Net [Abstract]
2019 (for the remaining three months)	$ 2,144
2020	6,459
2021	3,963
2022	1,526
Net carrying amount	$ 14,092	$ 12,893

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Capitalized Software Development Costs, Net (Tables)

9 Months Ended

Sep. 30, 2019

Research And Development [Abstract]

Summary of Capitalized Software Development Costs, Net

Capitalized software development costs consisted of the following (in thousands):

				As of September 30, 2019
	Gross carrying amount		Amortization period	Accumulated amortization			Net carrying amount
Capitalized software development costs	$	47,820	3 years	$	(33,728	)	$	14,092
Total capitalized software development costs	$	47,820		$	(33,728	)	$	14,092

				As of December 31, 2018
	Gross carrying amount		Amortization period	Accumulated amortization			Net carrying amount
Capitalized software development costs	$	45,677	3 years	$	(32,784	)	$	12,893
Total capitalized software development costs	$	45,677		$	(32,784	)	$	12,893

Schedule of Expected Amortization of Capitalized Software Development Costs

The expected amortization of capitalized software development costs, as of September 30, 2019, for each of the following years is as follows (in thousands):

2019 (for the remaining three months)	$	2,144
2020		6,459
2021		3,963
2022		1,526
	$	14,092

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Segment Information

9 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Segment Information

(14) Segment information

The Company operates as one operating segment. Operating segments are defined as components of an enterprise for which separate financial information is evaluated regularly by the chief operating decision maker (“CODM”), who is the Company’s chief executive officer, in deciding how to allocate resources and assess the Company’s financial and operational performance. While the Company has applications that address multiple use cases, all of the Company’s applications operate on and leverage a single technology platform and are deployed and sold in an identical way. In addition, the Company’s CODM evaluates the Company’s financial information and resources and assesses the performance of these resources on a consolidated basis. As a result, the Company has determined that the Company’s business operates in a single operating segment. Since the Company operates as one operating segment, all required financial segment information can be found in the consolidated financial statements.

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Subsequent Events

9 Months Ended

Sep. 30, 2019

Subsequent Events [Abstract]

Subsequent Events

(18) Subsequent Events

The Company evaluated subsequent events and concluded that no subsequent events have occurred that would require recognition in the unaudited Condensed Consolidated Financial Statements or disclosure in the notes thereto.

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Stock Plans and Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Assumptions Used in Determining Fair Value of Stock Option Grants

The fair value of stock option grants and ESPP are determined using the Black-Scholes option pricing model with the following weighted average assumptions. In addition, the fair value per share on grant date is presented below: 

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Employee Stock Options:
Fair value per share on grant date		—	$58.75			—	$33.06 - $58.75
Expected term (in years) (1)		—		6.00		—		6.00
Expected volatility (2)		—	45%			—	45% - 50%
Risk-free interest rate (3)		—	2.72%			—	2.72% - 2.98%
Dividend rate (4)		—	0%			—	0%
Employee Stock Purchase Plan:
Expected term (in years) (1)		0.50		0.50		0.50		0.50
Expected volatility (2)	45%		45% - 50%		45%		45% - 60%
Risk-free interest rate (3)	1.93% - 2.52%		1.89% - 2.33%		1.93% - 2.52%		1.18% - 2.33%
Dividend rate (4)	0%		0%		0%		0%

⁽¹⁾ The expected term represents the period that the stock-based compensation awards are expected to be outstanding. Since the Company did not have sufficient historical information to develop reasonable expectations about future exercise behavior, the Company used the simplified method to compute expected term, which reflects the average of the time-to-vesting and the contractual life;

⁽²⁾ The expected volatility of the Company’s common stock on the date of grant is based on the weighted average of the Company’s historical volatility as a public company and the volatilities of publicly traded peer companies that are reasonably comparable to the Company’s own operations;

⁽³⁾ The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for zero coupon U.S. Treasury notes with maturities approximately equal to the expected term of the grant; and

⁽⁴⁾ The expected dividend yield is assumed to be zero as the Company has never paid dividends and has no current plans to pay any dividends on the Company’s common stock.

Schedule of Stock Option Activity

A summary of activities under the 2008 Plan and the 2016 Plan is shown as follows for the year ended December 31, 2018 and the nine months ended September 30, 2019:

	Stock options outstanding			Weighted average exercise price
Outstanding at December 31, 2017		2,440,290		$	16.55
Granted		557,896			35.01
Exercised		(778,370	)		13.04
Forfeited		(473,743	)		22.35
Outstanding at December 31, 2018		1,746,073			22.43
Granted		—			—
Exercised		(851,467	)		18.58
Forfeited		(96,758	)		23.95
Outstanding at September 30, 2019		797,848			26.36

Schedule of Stock Options Outstanding and Options Exercisable and Vested

Stock options outstanding, and options exercisable and vested are as follows:

Outstanding as of September 30, 2019		Remaining contractual life (years)		Weighted average exercise price		Exercisable as of September 30, 2019		Remaining contractual life (years)		Weighted average exercise price
	797,848		7.65	$	26.36		222,219		6.53	$	18.21

Outstanding as of December 31, 2018		Remaining contractual life (years)		Weighted average exercise price		Exercisable as of December 31, 2018		Remaining contractual life (years)		Weighted average exercise price
	1,746,073		7.89	$	22.43		579,319		6.73	$	8.13

Schedule of Vested and Nonvested Stock Option Activity

Vested and nonvested stock option activity was as follows:

	Vested				Nonvested
	Options outstanding		Weighted average exercise price		Options outstanding		Weighted average exercise price
Outstanding at September 30, 2019		222,219	$	18.21		575,629	$	29.50
Outstanding at December 31, 2018		579,319	$	8.13		1,166,754	$	26.58

Summary of Activity in Connection with RSUs, Market-based RSUs and RSUs

A summary of activity in connection with the Company’s RSUs, market-based RSUs and PSUs for the nine-month period ended September 30, 2019 is as follows:

	Number of Shares
Outstanding as of December 31, 2018		904,033
Granted		687,817
Vested		(271,853	)
Forfeited		(75,181	)
Outstanding as of September 30, 2019		1,244,816

Summary of Stock-Based Compensation Expense

The Company recorded the total stock-based compensation expense as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Cost of revenue	$	509	$	312	$	1,356	$	1,877
Sales and marketing		2,423		1,180		7,338		7,147
Research and development		1,732		1,091		5,560		5,606
General and administrative		3,637		958		9,840		5,627
Total	$	8,301	$	3,541	$	24,094	$	20,257

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Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

(2) Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018.

The condensed consolidated balance sheet as of December 31, 2018, included herein, was derived from the audited financial statements as of that date, but does not include all disclosures including certain notes required by GAAP on an annual reporting basis. In order to conform to the current year’s presentation, current Deferred costs of $6.5 million and noncurrent Deferred costs of $10.3 million as of December 31, 2018 are reported in Deferred costs and other current assets and Deferred costs and other assets, respectively, with no effect on Total current assets or Total assets, respectively.

In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss, statements of stockholders’ equity and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full year 2019 or any future period.

Effective January 1, 2019, the Company adopted the requirements of Accounting Standards Update (“ASU”) No. 2016-02, Leases, as discussed in this Note 2 and Note 16.

Principles of Consolidation

The condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated.

Use of Estimates

The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements, and the reported amount of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Assets and liabilities which are subject to judgment and use of estimates include the determination of the period of benefit for deferred commissions, allowances for doubtful accounts, the fair value of assets acquired and liabilities assumed in business combinations, the recoverability of goodwill and long-lived assets, valuation allowances with respect to deferred tax assets, useful lives associated with property and equipment and intangible assets, contingencies, and the valuation and assumptions underlying stock-based compensation. On an ongoing basis, the Company evaluates its estimates compared to historical experience and trends, which form the basis for making judgments about the carrying value of assets and liabilities. In addition, the Company engages valuation specialists to assist with management’s determination of the valuation of its fair values of assets acquired and liabilities assumed in business combinations and certain market-based performance equity awards.

Concentrations of Credit and Business Risk

Financial instruments that potentially subject the Company to a concentration of credit risk consist of cash and cash equivalents and accounts receivable.

The Company maintains cash balances at several banks. Accounts located in the United States are insured by the Federal Deposit Insurance Corporation (“FDIC”) up to $250,000. From time to time, balances may exceed amounts insured by the FDIC. The Company has not experienced any losses in such amounts.

The Company’s accounts receivable are generally unsecured and are derived from revenue earned from customers primarily located in the United States, Norway, Sweden and the United Kingdom and are generally denominated in U.S. dollars, Norwegian Krone, Swedish Kronor or British Pounds. Each reporting period, the Company reevaluates each customer’s ability to satisfy credit obligations and maintains an allowance for doubtful accounts based on the evaluations. No single customer comprised more than 10% of the Company’s total revenue for the three and nine months ended September 30, 2019 and 2018. No single customer comprised more than 10% of the Company’s total accounts receivable as of September 30, 2019 and 2018.   

Cash and Cash Equivalents

The Company considers all highly liquid instruments with original maturities of three months or less at the date of purchase to be cash equivalents. Cash and cash equivalents are recorded at cost, which approximates fair value. As of September 30, 2019, $174.8 million of the Company’s cash equivalents were invested in money market funds.

Restricted Cash

The Company’s restricted cash balance primarily consist of cash held at a financial institution for collateral against performance on the Company’s customer contracts and certain other cash deposits for specific purposes.

Short-Term Investments

Short-term investments consist of highly liquid investments, primarily commercial paper, U.S. Treasury and U.S. agency securities, with maturities over three months from the date of purchase and less than 12 months from the date of the balance sheet. Debt securities, money market funds and U.S. agency bonds that the Company has the ability and positive intent to hold to maturity are carried at amortized cost, which approximates fair value. There were no short-term investments at September 30, 2019. Short-term investments of $45.5 million at December 31, 2018 were classified as held-to-maturity and primarily comprised of U.S. treasury and U.S. government and agency securities. All held-to-maturity securities have maturity dates within one year.

Significant Accounting Policies

Except for the accounting policies for leases that were updated, as set forth below, as a result of adopting ASU No. 2016-02, there have been no changes to the Company’s significant accounting policies described in the Annual Report on Form 10-K for the year ended December 31, 2018 filed with the SEC on March 1, 2019, that have had a material impact on the Company’s condensed consolidated financial statements and related notes.

Revenue Recognition

The Company derives its revenues primarily from subscription services and professional services. Revenues are recognized when control of these services is transferred to the Company’s customers in an amount that reflects the consideration it expects to be entitled to in exchange for those services.

The Company determines revenue recognition through the following steps:

• Identification of the contract, or contracts, with a customer

• Identification of the performance obligations in the contract

• Determination of the transaction price

• Allocation of the transaction price to the performance obligations in the contract

• Recognition of revenue when, or as, the Company satisfies a performance obligation

Subscription Services Revenues

Subscription services revenues primarily consist of fees that provide customers access to one or more of the Company’s hosted applications for critical event management, with routine customer support. Revenue is generally recognized over time on a ratable

basis over the contract term beginning on the date that the Company’s service is made available to the customer. All services are recognized using an output measure of progress looking at time elapsed as the contract generally provides the customer equal benefit throughout the contract period. The Company’s subscription contracts are generally two years or longer in length, billed annually in advance, and non-cancelable.

Professional Services Revenues

Professional services revenues primarily consist of fees for deployment and optimization services, as well as training. The majority of the Company’s consulting contracts revenue is recognized over time as the services are performed. For contracts billed on a fixed price basis, revenue is recognized over time based on the proportion performed.

Software License Revenues

On occasion we may sell software and related post contract support for on premise usage which is outside of our core business. These sales have been to a limited number of customers and is not a significant revenue stream for the Company.

Contracts with Multiple Performance Obligations

Some of the Company’s contracts with customers contain multiple performance obligations. For these contracts, the Company accounts for individual performance obligations separately if they are distinct. The transaction price is allocated to the separate performance obligations on a relative standalone selling price basis for those performance obligations with stable observable prices and then the residual method applied for any performance obligation that has pricing, which is highly variable. The Company determines the standalone selling prices based on the Company’s overall pricing objectives, taking into consideration market conditions and other factors, including the value of the Company’s contracts, the applications sold, customer demographics, geographic locations, and the number and types of users within the Company’s contracts.

Returns

The Company does not offer rights of return for its products and services in the normal course of business. 

Customer Acceptance

The Company’s contracts with customers generally do not include customer acceptance clauses.

Trade and Other Receivables

Trade and other receivables are primarily comprised of trade receivables that are recorded at the invoice amount, net of an allowance for doubtful accounts, which is not material. Other receivables represent unbilled receivables related to subscription and professional services contracts.

Deferred Costs

Sales commissions earned by the Company’s sales force are considered incremental and recoverable costs of obtaining a contract with a customer. These costs are deferred and then amortized on a straight-line basis over a period of benefit that the Company has determined to be four years. The Company has determined the period of benefit by taking into consideration its customer contracts, its technology and other factors. Sales commissions attributed to renewals are not material and are not commensurate with initial and growth sales. Amortization of deferred commissions is included in sales and marketing expenses in the accompanying condensed consolidated statements of operations.

Deferred Revenue

Deferred revenue consists of amounts that have been invoiced and for which the Company has the right to bill, but that have not been recognized as revenue because the related goods or services have not been transferred. Deferred revenue that will be realized during the succeeding 12-month period is recorded as current, and the remaining deferred revenue is recorded as non-current.

In instances where the timing of revenue recognition differs from the timing of invoicing, the Company has determined its contracts generally do not include a significant financing component. The primary purpose of the Company’s invoicing terms is to provide customers with simplified and predictable ways of purchasing the Company’s products and services, not to receive financing from its customers or to provide customers with financing. Examples include invoicing at the beginning of a subscription term with revenue recognized ratably over the contract period.

Recently Adopted Accounting Pronouncements

ASU No. 2016-02

In February 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-02, Leases (Topic 842), to require lessees to recognize most leases on the balance sheet, while recognition on the statement of operations will remain similar to current lease accounting. The ASU requires lessees to recognize a liability for lease obligations, which represents the discounted obligation to make future lease payments, and a corresponding right-of-use (“ROU”) asset on the balance sheet. The guidance requires disclosure of key information about leasing arrangements that is intended to give financial statement users the ability to assess the amount, timing and potential uncertainty of cash flows related to leases. The ASU also eliminates real estate-specific provisions and modifies certain aspects of lessor accounting.

The Company adopted the standard on January 1, 2019 using the modified retrospective approach. The Company elected to apply the transition method that allows companies to continue applying the guidance under the lease standard in effect at that time in the comparative periods presented in the consolidated financial statements and recognize a cumulative-effect adjustment to the opening balance of retained earnings on the date of adoption. The Company also elected the “package of practical expedients”, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs.

Results for reporting periods beginning after January 1, 2019 are presented under the new standard, while prior period amounts are not adjusted and continue to be reported under the accounting standards in effect for the prior period. Upon adoption of the new lease standard, on January 1, 2019, the Company capitalized ROU assets of $14.7 million and $16.9 million of lease liabilities, within the Company’s condensed consolidated balance sheets upon adoption. Additionally, the Company reversed its deferred rent liability of $2.2 million, which upon adoption became a component of the right-of-use asset. The adoption of this standard did not have an impact on the Company’s condensed consolidated statement of operations or cash flows and did not result in a cumulative catch-up adjustment to the opening balance of retained earnings.

ASU No. 2018-02

In February 2018, the FASB issued ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The amendments in this update allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the U.S. Tax Cuts and Jobs Act of 2017. The new standard is effective for the Company beginning on January 1, 2019, with early adoption permitted. The Company adopted ASU 2018-02 effective January 1, 2019. The adoption of this standard did not have an impact on the Company’s condensed consolidated financial statements.

ASU No. 2018-07

In June 2018, the FASB issued ASU 2018-07, Improvements to Nonemployee Share Based Payments. The improvement expands stock-based compensation guidance to include share-based payment transactions for acquiring goods and services from nonemployees. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2018. The new standard is effective for the Company beginning on January 1, 2019, with early adoption permitted. The Company adopted ASU 2018-07 effective January 1, 2019. The adoption of this standard did not have an impact on our condensed consolidated financial statements.

Recently Issued Accounting Guidance Not Yet Adopted

ASU 2016-13

In June 2016, the FASB issued ASU 2016-13 (as amended through May 2019), Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 introduces a new forward-looking approach, based on expected losses, to estimate credit losses on certain types of financial instruments, including trade receivables and held-to-maturity debt securities, which will require entities to incorporate considerations of historical information, current information and reasonable and supportable forecasts. This ASU also expands disclosure requirements. ASU 2016-13 is effective for the Company beginning in the first quarter of 2020 and early adoption is permitted. The guidance will be applied using the modified-retrospective approach. The Company is currently assessing the impact this standard will have on the Company’s consolidated financial statements.

ASU 2018-13

In August 2018, the FASB issued ASU 2018-13, Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurements, which eliminates, adds and modifies certain disclosure requirements for fair value measurements as part of the FASB’s disclosure framework project. Adoption of this guidance is required for fiscal years and interim periods within those fiscal years, beginning after December 15, 2019. The Company is currently assessing the impact this standard will have on the Company’s consolidated financial statements.

ASU 2018-15

In August 2018, the FASB issued ASU 2018-15, Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, a new standard on a customer's accounting for implementation, set-up, and other upfront costs incurred in a cloud computing arrangement (“CCA”). Under the new guidance, customers will assess if a CCA includes a software license and if a CCA does include a software license, implementation and set-up costs will be accounted for consistent with existing internal-use software implementation guidance. Implementation costs associated with a CCA that do not include a software license would be expensed to operating expenses. The standard also provides classification guidance on these implementation costs as well as additional quantitative and qualitative disclosures. The standard is effective for public business entities for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption is permitted, including adoption in any interim period. Entities can choose to adopt the new guidance prospectively or retrospectively. The Company is currently assessing the impact this standard will have on the Company’s consolidated financial statements.

Other accounting standard updates effective for interim and annual periods beginning after December 31, 2018 are not expected to have a material impact on the Company’s financial position, results of operations or cash flows.

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis

The following table summarizes the Company's financial assets and liabilities measured at fair value on a recurring basis at September 30, 2019 and December 31, 2018 by level within the fair value hierarchy. Financial assets and financial liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement (in thousands):

	As of September 30, 2019
	Quoted		Significant
	Prices in		Other		Significant
	Active		Observable		Unobservable
	Markets		Inputs		Inputs		Total Fair
	(Level 1)		(Level 2)		(Level 3)		Value
Assets:
Cash equivalents:
Money market funds	$	174,819	$	—	$	—	$	174,819
Total financial assets	$	174,819	$	—	$	—	$	174,819
Liabilities:
Contingent consideration	$	—	$	—	$	550	$	550
Total financial liabilities	$	—	$	—	$	550	$	550
	As of December 31, 2018
	Quoted		Significant
	Prices in		Other		Significant
	Active		Observable		Unobservable
	Markets		Inputs		Inputs		Total Fair
	(Level 1)		(Level 2)		(Level 3)		Value
Assets:
Cash equivalents:
Money market funds	$	47,258	$	—	$	—	$	47,258
U.S. government and agency securities		—		2,272		—		2,272
Short-term investments:
U.S. treasury securities		—		38,809		—		38,809
U.S. government and agency securities		—		6,732		—		6,732
Total financial assets	$	47,258	$	47,813	$	—	$	95,071

Summary of Changes in Level 3 Financial Instruments

The following table summarizes the changes in Level 3 financial instruments (in thousands):

Fair Value at December 31, 2018	$	—
Additions from acquisition		550
Balance at September 30, 2019	$	550

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Nov. 04, 2019
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Entity Registrant Name	Everbridge, Inc.
Entity Central Index Key	0001437352
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		33,790,452
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity File Number	001-37874
Entity Tax Identification Number	26-2919312
Entity Address, Address Line One	25 Corporate Drive
Entity Address, Address Line Two	Suite 400
Entity Address, City or Town	Burlington
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01803
City Area Code	818
Local Phone Number	230-9700
Document Quarterly Report	true
Document Transition Report	false
Entity Incorporation, State or Country Code	DE
Title of 12(b) Security	Common Stock, $0.001 par value per share
Trading Symbol	EVBG
Security Exchange Name	NASDAQ

XML

Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($) Customer	Sep. 30, 2018 Customer	Sep. 30, 2019 USD ($) Customer	Sep. 30, 2018 Customer	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Deferred costs current	$ 7,700,000		$ 7,700,000			$ 6,500,000
Deferred costs non current	12,000,000.0		12,000,000.0			10,300,000
Short-term investments	0		$ 0			$ 45,500,000
Subscription contracts			The Company’s subscription contracts are generally two years or longer in length, billed annually in advance, and non-cancelable.
ROU assets	13,824,000		$ 13,824,000
Lease, liability	16,228,000		$ 16,228,000
ASU 2016-02 [Member]
ROU assets					$ 14,700,000
Lease, liability					16,900,000
Deferred rent liability reversed to right-of-use asset upon adoption					$ 2,200,000
Incremental and Recoverable Costs
Deferred cost amortization period			4 years
Money Market Funds
Cash and cash equivalents fair value disclosure	$ 174,800,000		$ 174,800,000
Customer Concentration Risk | Revenue
Number of customers above 10% threshold | Customer	0	0	0	0
Customer Concentration Risk | Accounts Receivable
Number of customers above 10% threshold | Customer	0	0	0	0
Maximum
Cash and cash equivalent, FDIC insured amount	$ 250,000		$ 250,000

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Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (12,921)	$ (8,450)	$ (39,118)	$ (37,710)
Other comprehensive income (loss):
Foreign currency translation adjustment, net of taxes	(2,049)	81	(1,756)	(2,570)
Total comprehensive loss	$ (14,970)	$ (8,369)	$ (40,874)	$ (40,280)

XML

Fair Value Measurements

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurements

(6) Fair Value Measurements

The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities approximate fair value because of the short maturity of these items.

Certain assets, including long-lived assets, goodwill and intangible assets are also subject to measurement at fair value on a non-recurring basis if they are deemed to be impaired as a result of an impairment review. For the nine months ended September 30, 2019 and year ended December 31, 2018, no impairments were identified.

The following table summarizes the Company's financial assets and liabilities measured at fair value on a recurring basis at September 30, 2019 and December 31, 2018 by level within the fair value hierarchy. Financial assets and financial liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement (in thousands):

	As of September 30, 2019
	Quoted		Significant
	Prices in		Other		Significant
	Active		Observable		Unobservable
	Markets		Inputs		Inputs		Total Fair
	(Level 1)		(Level 2)		(Level 3)		Value
Assets:
Cash equivalents:
Money market funds	$	174,819	$	—	$	—	$	174,819
Total financial assets	$	174,819	$	—	$	—	$	174,819
Liabilities:
Contingent consideration	$	—	$	—	$	550	$	550
Total financial liabilities	$	—	$	—	$	550	$	550
	As of December 31, 2018
	Quoted		Significant
	Prices in		Other		Significant
	Active		Observable		Unobservable
	Markets		Inputs		Inputs		Total Fair
	(Level 1)		(Level 2)		(Level 3)		Value
Assets:
Cash equivalents:
Money market funds	$	47,258	$	—	$	—	$	47,258
U.S. government and agency securities		—		2,272		—		2,272
Short-term investments:
U.S. treasury securities		—		38,809		—		38,809
U.S. government and agency securities		—		6,732		—		6,732
Total financial assets	$	47,258	$	47,813	$	—	$	95,071

The Company classifies and discloses fair value measurements in one of the following three categories of fair value hierarchy:

Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets and liabilities.

Level 2 - Quoted prices in markets that are not active or financial instruments for which all significant inputs are observable, either directly or indirectly.

Level 3 - Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable.

A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.

The Company’s assets that are measured by management at fair value on a recurring basis are generally classified within Level 1 or Level 2 of the fair value hierarchy. The Company did not have any transfers into and out of Level 1 or Level 2 during the nine months ended September 30, 2019.  

The Company considers all highly liquid investments purchased with a remaining maturity of three months or less to be cash equivalents. The fair value of the Company’s investments in certain money market funds is their face value and such instruments are classified as Level 1 and are included in cash and cash equivalents on the consolidated balance sheets. At December 31, 2018, the Company’s Level 2 securities were priced by pricing vendors. These pricing vendors utilize the most recent observable market information in pricing these securities or, if specific prices are not available for these securities, use other observable inputs like market transactions involving identical or comparable securities. There were no Level 2 securities at September 30, 2019.

The following table summarizes the changes in Level 3 financial instruments (in thousands):

Fair Value at December 31, 2018	$	—
Additions from acquisition		550
Balance at September 30, 2019	$	550

The Company estimates the fair value of the convertible senior notes based on their last actively traded prices (Level 1) or market-observable inputs (Level 2). As of September 30, 2019 and December 31, 2018, the fair value of the convertible senior notes was determined to be $217.9 million and $189.8 million, respectively, and the carrying value of the notes was $97.8 million and $94.1 million, respectively.

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Stockholders' Equity

9 Months Ended

Sep. 30, 2019

Equity [Abstract]

Stockholders' Equity

(10) Stockholders’ Equity

Preferred Stock

As of September 30, 2019, the Company had authorized 10,000,000 shares of preferred stock, par value $0.001, of which no shares were outstanding.

Common Stock

As of September 30, 2019, the Company had authorized 100,000,000 shares of common stock, par value $0.001. Holders of common stock are entitled to one vote per share. At September 30, 2019 and December 31, 2018, there were 33,778,616 and 29,700,192 shares of common stock issued and outstanding, respectively.

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Revenue Recognition - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Disaggregation Of Revenue [Line Items]
Receivables related to service	$ 1,600,000		$ 1,600,000
Deferred sales commissions current	7,700,000		7,700,000		$ 6,500,000
Deferred sales commissions noncurrent	12,000,000.0		12,000,000.0		10,300,000
Amortization expense for the deferred costs	1,900,000	$ 1,400,000	5,500,000	$ 3,900,000
Impairment loss related to costs capitalized	0		0		$ 0
Subscription Services
Disaggregation Of Revenue [Line Items]
Revenue recognized	36,900,000		77,000,000.0
Revenue remaining performance obligation	250,900,000		250,900,000
Professional Services
Disaggregation Of Revenue [Line Items]
Revenue recognized	4,100,000		5,200,000
Revenue remaining performance obligation	$ 12,200,000		$ 12,200,000

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Stock Plans and Stock-Based Compensation - Market-Based Restricted Stock Units - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 8,301	$ 3,541	$ 24,094	$ 20,257
Dividend rate			0.00%
Market-Based Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation, number of stock unit grants in period			0
Share Based compensation threshold consecutive trading days			30 days
Stock-based compensation expense		$ 100	$ 0	$ 10,300
Dividend rate			0.00%
Expected term (in years)			10 years
Unrecognized compensation expense	$ 0		$ 0
Vesting of restricted stock units			657	543,825
Market-Based Restricted Stock Units | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation, vesting stock price trigger			$ 35
Share-based compensation, share price on the date of issuance	$ 23.16		$ 23.16
Risk-free interest rate			2.26%
Expected volatility			50.00%
Market-Based Restricted Stock Units | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation, vesting stock price trigger			$ 65
Share-based compensation, share price on the date of issuance	$ 51.99		$ 51.99
Risk-free interest rate			2.85%
Expected volatility			60.00%

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Stock Plans and Stock-Based Compensation - Schedule of Stock Options Outstanding and Options Exercisable and Vested (Details) - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock options, outstanding	797,848	1,746,073	2,440,290
Stock options, remaining contractual life (years)	7 years 7 months 24 days	7 years 10 months 20 days
Stock options, weighted average exercise price	$ 26.36	$ 22.43	$ 16.55
Stock options, exercisable	222,219	579,319
Stock options exercisable, remaining contractual life (years)	6 years 6 months 10 days	6 years 8 months 23 days
Stock options exercisable, weighted average exercise price	$ 18.21	$ 8.13

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Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 99	$ 86	$ 531	$ 371
Effective income tax rate	0.77%	1.03%	1.38%	0.99%
Unrecognized tax provision	$ 600		$ 600
Unrecognized tax provision that would favorably impact effective tax rate	$ 600		$ 600

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Convertible Senior Notes - Additional Information (Details) - Convertible Senior Notes	1 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended
	Nov. 30, 2017 USD ($) $ / shares shares	Jun. 30, 2018 d	Sep. 30, 2019 USD ($) d $ / shares	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Aggregate principal amount	$ 115,000,000.0		$ 115,000,000	$ 115,000,000
Debt instrument, interest rate	1.50%
Debt instrument, maturity date	Nov. 01, 2022
Debt instrument, interest rate terms			Interest is payable semiannually in arrears on May 1 and November 1 of each year, commencing on May 1, 2018.
Interest payment commencing date	May 01, 2018
Debt Conversion, initial conversion rate | shares	29.6626
Principal amount per note used in conversion rate	$ 1,000
Conversion price per share | $ / shares	$ 33.71
Shares issuable upon conversion of debt | shares	3,400,000
Description of convertible notes at option of holders			Prior to the close of business on the business day immediately preceding May 1, 2022, the Notes will be convertible at the option of holders during certain periods, only upon satisfaction of certain conditions set forth below. On or after May 1, 2022, until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their Notes at the conversion rate at any time regardless of whether the conditions set forth below have been met.
Number of trading days | d		30
Implied interest rate			6.93%
Debt instrument, fair value			$ 92,100,000
Difference between aggregate principal amount and estimated fair value of liability component recoded in additional paid-in capital			$ 22,900,000
Initial strike price of capped call options | $ / shares			$ 33.71
Capped call options, cap price | $ / shares			47.20
Cost of purchased capped call options				$ 12,900,000
Share price | $ / shares			$ 61.71
Scenario One
Debt Instrument [Line Items]
Number of trading days | d			20
Number of consecutive trading days | d			30
Percentage of last reported sale price to conversion price on each applicable trading day			130.00%
Scenario Two
Debt Instrument [Line Items]
Number of consecutive trading days | d			5
Percentage of last reported sale price to conversion price on each applicable trading day			98.00%
Notes measurement period			5 days

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Fair Value Measurements - Summary of Changes in Level 3 Financial Instruments (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Fair Value Disclosures [Abstract]
Additions from acquisition	$ 550
Ending balance, fair value	$ 550

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Goodwill and Intangible Assets, Net - Schedule of Expected Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
2019 (for the remaining three months)	$ 4,015
2020	14,786
2021	14,410
2022	11,200
2023	8,367
Thereafter	17,846
Net carrying amount	$ 70,624	$ 23,197