Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Dec. 31, 2016	Mar. 15, 2017	Jun. 30, 2016
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY
Trading Symbol	EVBG
Entity Registrant Name	EVERBRIDGE, INC.
Entity Central Index Key	0001437352
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		27,235,633
Entity Public Float			$ 0

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 60,765	$ 8,578
Accounts receivable, net	17,812	15,699
Prepaid expenses	1,770	1,371
Other current assets	2,536	3,972
Total current assets	82,883	29,620
Property and equipment, net	2,923	3,620
Capitalized software development costs, net	8,792	8,178
Goodwill	9,676	7,839
Intangible assets, net	3,940	4,119
Other assets	108	133
Total assets	108,322	53,509
Current liabilities:
Accounts payable	2,434	3,521
Accrued payroll and employee related liabilities	7,456	6,062
Accrued expenses	1,957	1,460
Term loan		830
Deferred revenue	51,388	39,159
Notes payable		2,018
Other current liabilities	548	569
Total current liabilities	63,783	53,619
Long-term liabilities:
Deferred revenue, noncurrent	1,246	1,308
Line of credit		9,976
Term loan, net of current portion		4,146
Deferred tax liabilities	494	345
Other long term liabilities	447	166
Total liabilities	65,970	69,560
Commitments and contingencies
Stockholders’ equity (deficit):
Preferred stock
Common stock	27	11
Additional paid-in capital	132,246	62,274
Accumulated deficit	(89,618)	(78,332)
Accumulated other comprehensive loss	(303)	(13)
Total stockholders’ equity (deficit)	42,352	(16,051)
Total liabilities and stockholders’ equity (deficit)	$ 108,322	53,509
Series A Preferred Stock
Stockholders’ equity (deficit):
Preferred stock		3
Total stockholders’ equity (deficit)		3
Series A-1 Preferred Stock
Stockholders’ equity (deficit):
Preferred stock		5
Total stockholders’ equity (deficit)		5
Class A Common Stock
Stockholders’ equity (deficit):
Common stock		1
Total stockholders’ equity (deficit)		$ 1

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	0
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	27,150,674	11,106,926
Common stock, shares outstanding	27,150,674	11,106,926
Series A Preferred Stock
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	0	3,129,086
Preferred stock, shares issued	0	3,129,084
Preferred stock, shares outstanding	0	3,129,084
Preferred stock, aggregate liquidation preference value		$ 11,357
Series A-1 Preferred Stock
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	0	5,870,914
Preferred stock, shares issued	0	5,225,879
Preferred stock, shares outstanding	0	5,225,879
Preferred stock, aggregate liquidation preference value		$ 18,291
Class A Common Stock
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	0	1,164,497
Common stock, shares issued	0	1,164,105
Common stock, shares outstanding	0	1,164,105
Common stock, aggregate liquidation preference value		$ 1,339

Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement Of Income And Comprehensive Income [Abstract]
Revenue	$ 76,846	$ 58,720	$ 42,421
Cost of revenue	23,767	19,789	12,089
Gross profit	53,079	38,931	30,332
Operating expenses:
Sales and marketing	34,847	25,925	15,818
Research and development	14,765	11,521	7,365
General and administrative	14,293	12,272	7,435
Total operating expenses	63,905	49,718	30,618
Operating loss	(10,826)	(10,787)	(286)
Other income (expense), net:
Interest income	34	1	2
Interest expense	(506)	(538)	(350)
Other expenses, net	(12)	(62)	(78)
Total other expense, net	(484)	(599)	(426)
Loss before income taxes	(11,310)	(11,386)	(712)
Benefit from income taxes	24	562	89
Net loss	$ (11,286)	$ (10,824)	$ (623)
Net loss per share attributable to common stockholders:
Basic	$ (0.68)	$ (0.88)	$ (0.05)
Diluted	$ (0.68)	$ (0.88)	$ (0.05)
Weighted-average common shares outstanding:
Basic	16,659,561	12,257,413	11,788,883
Diluted	16,659,561	12,257,413	11,788,883
Other comprehensive (loss) income:
Foreign currency translation adjustment, net of taxes	$ (290)	$ 29	$ (68)
Total other comprehensive (loss) income	(290)	29	(68)
Total comprehensive loss	$ (11,576)	$ (10,795)	$ (691)

Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	IPO	Series A Preferred Stock	Series A-1 Preferred Stock	Class A Common Stock	Common Stock	Common Stock IPO	Additional Paid-in Capital	Additional Paid-in Capital IPO	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2013	$ (12,088)		$ 3	$ 5	$ 1	$ 10		$ 54,752		$ (66,885)	$ 26
Beginning Balance, shares at Dec. 31, 2013			3,129,084	5,225,879	1,164,105	10,203,325
Stock-based compensation	376							376
Issuance of common stock for acquisitions	6,851					$ 1		6,850
Issuance of common stock for acquisitions, shares						829,424
Cashless exercise of common stock warrant, shares						18,740
Exercise of stock options	225							225
Exercise of stock options, shares						185,768
Other comprehensive income (loss)	(68)										(68)
Net loss	(623)									(623)
Ending Balance at Dec. 31, 2014	(5,327)		$ 3	$ 5	$ 1	$ 11		62,203		(67,508)	(42)
Ending Balance, shares at Dec. 31, 2014			3,129,084	5,225,879	1,164,105	11,237,257
Stock-based compensation	1,522							1,522
Stock-based compensation, shares						6,023
Repurchase of common stock	(1,500)							(1,500)
Repurchase of common stock, shares						(173,913)
Issuance of common stock in initial public offering, net of issuance costs, shares		6,250,000
Exercise of stock options	$ 49							49
Exercise of stock options, shares	37,559					37,559
Other comprehensive income (loss)	$ 29										29
Net loss	(10,824)									(10,824)
Ending Balance at Dec. 31, 2015	(16,051)		$ 3	$ 5	$ 1	$ 11		62,274		(78,332)	(13)
Ending Balance, shares at Dec. 31, 2015			3,129,084	5,225,879	1,164,105	11,106,926
Stock-based compensation	3,101							3,101
Issuance of common stock in initial public offering, net of issuance costs		$ 66,103					$ 6		$ 66,097
Issuance of common stock in initial public offering, net of issuance costs, shares							6,250,000
Conversion of convertible preferred stock and Class A common stock into common stock			$ (3)	$ (5)	$ (1)	$ 9
Conversion of convertible preferred stock and Class A common stock into common stock, shares			(3,129,084)	(5,225,879)	(1,164,105)	9,519,068
Cashless exercise of common stock warrant, shares						100,683
Exercise of stock options	$ 750					$ 1		749
Exercise of stock options, shares	163,968					163,968
Exercise of common stock warrant	$ 25							25
Exercise of common stock warrant, shares						10,029
Other comprehensive income (loss)	(290)										(290)
Net loss	(11,286)									(11,286)
Ending Balance at Dec. 31, 2016	$ 42,352					$ 27		$ 132,246		$ (89,618)	$ (303)
Ending Balance, shares at Dec. 31, 2016						27,150,674

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net loss	$ (11,286)	$ (10,824)	$ (623)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	7,742	5,976	2,512
Loss on disposal of assets	74
Deferred income taxes	(138)	(431)	(315)
Accretion of interest on notes payable		130
Non-cash interest expense on line of credit and term loan	67	11
Provision for doubtful accounts	387	366	206
Stock-based compensation	3,056	1,488	376
Increase (decrease) in operating assets and liabilities:
Accounts receivable	(2,295)	(4,813)	(1,008)
Prepaid expenses	(348)	(656)	(304)
Other assets	(1,096)	(408)	(217)
Accounts payable	(423)	866	414
Accrued payroll and employee related liabilities	1,312	1,181	1,407
Accrued expenses	539	(171)	152
Deferred revenue	11,982	11,623	4,973
Other liabilities	(70)	113	143
Net cash provided by operating activities	9,503	4,451	7,716
Cash flows from investing activities:
Capital expenditures	(970)	(2,502)	(2,155)
Payments for acquisition of business, net of acquired cash	(2,306)		(304)
Additions to capitalized software development costs	(5,494)	(4,902)	(1,677)
Purchase of intangibles	(250)
Net cash used in investing activities	(9,020)	(7,404)	(4,136)
Cash flows from financing activities:
Proceeds from line of credit	9,500	12,000	6,400
Payments on line of credit	(19,500)	(5,000)	(6,766)
Payments of issuance costs relating to line of credit and term loan	(19)	(59)
Principal payments on capital leases	(58)	(101)	(85)
Proceeds from initial public offering, net of underwriters discounts and commissions	69,750
Payments of initial public offering costs	(1,960)	(1,391)
Payments on notes payable	(2,018)	(1,779)	(1,894)
(Payments) proceeds from term loan	(5,000)	5,000
Proceeds from warrant exercises	25
Proceeds from option exercises	750	49	225
Repurchase of common stock		(1,500)
Net cash provided by (used in) financing activities	51,470	7,219	(2,120)
Effect of exchange rates on cash and cash equivalents	234	(100)	(88)
Net increase in cash and cash equivalents	52,187	4,166	1,372
Cash and cash equivalents—beginning of year	8,578	4,412	3,040
Cash and cash equivalents—end of year	60,765	8,578	4,412
Supplemental disclosures of cash flow information:
Interest	495	369	217
Taxes, net of (refunds)	(117)	124	93
Supplemental disclosure of non-cash activities
Issuance of common stock in connection with acquisition			6,851
Issuance of notes payable in connection with acquisition			5,815
Capitalized assets included in accounts payable and accrued expenses	104	63	$ 190
Deferred offering costs in accounts payable and accrued expenses	298	1,175
Stock-based compensation capitalized for software development	$ 45	$ 34

Business and Nature of Operations	12 Months Ended
Business and Nature of Operations	Dec. 31, 2016
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 critical communications and enterprise safety applications that enable customers to automate and accelerate the process of keeping people safe and businesses running during critical events. 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, IT Alerting, Safety Connection, Community Engagement, Secure Messaging, Crisis Commander and Visual Command Center, automate numerous critical communications processes. The Company generates revenue primarily from subscription fees to the Company’s enterprise applications. The Company has operations in the United States, Sweden, the United Kingdom and China. Initial Public Offering On September 21, 2016, the Company completed an initial public offering, or IPO, in which the Company sold 6,250,000 shares of its common stock at the public offering price of $12.00 per share. The Company received net proceeds of $66.1 million, after deducting underwriting discounts and commissions and offering expenses paid and payable by the Company, from sales of its shares in the IPO. In connection with the closing of the IPO, all shares of Class A common stock then outstanding were converted into 1,164,105 shares of common stock and all shares of convertible preferred stock then outstanding were converted into 8,354,963 shares of common stock, in each case on a one-to-one basis.

Summary of Significant Accounting Policies	12 Months Ended
Summary of Significant Accounting Policies	Dec. 31, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	(2) Summary of Significant Accounting Policies Basis of Presentation The accompanying consolidated financial statements include the Company’s results of operations and those of its wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. The Company’s accounting and financial reporting policies conform to generally accepted accounting principles in the United States of America, or U.S. GAAP. Principles of Consolidation The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. Business acquisitions are included in the Company’s consolidated financial statements from the date of the acquisition. The Company’s purchase accounting resulted in all assets and liabilities of acquired businesses being recorded at their estimated fair values on the acquisition dates. Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the 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 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. Recent Accounting Standards In January 2017, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update, or ASU, 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. This guidance eliminates Step 2 from the goodwill impairment test, instead requiring an entity to recognize a goodwill impairment charge for the amount by which the goodwill carrying amount exceeds the reporting unit’s fair value. This guidance is effective for interim and annual goodwill impairment tests in fiscal years beginning after December 15, 2019, and early adoption is permitted. This guidance must be applied on a prospective basis. The Company expects to adopt this guidance for interim and annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company does not expect the adoption of this guidance to have a material impact on its financial position, results of operations or cash flows. In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. This guidance narrows the definition of a business. This standard provides guidance to assist entities with evaluating when a set of transferred assets and activities is a business. This guidance is effective for interim and annual reporting periods beginning after December 15, 2017, and early adoption is permitted. This guidance must be applied prospectively to transactions occurring within the period of adoption. The Company expects to adopt this guidance effective January 1, 2018. The Company does not expect the adoption of this guidance to have a material impact on its financial position, results of operations or cash flows. In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. This guidance requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and restricted cash. As a result, restricted cash will be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The new guidance is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, and the new guidance is to be applied retrospectively. The Company does not expect the adoption of this guidance to have a material impact on its cash flows. In September 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. This guidance clarifies the presentation requirements of eight specific issues within the statement of cash flows. The new guidance is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted. The adoption of this guidance is not expected to have a significant impact on the Company’s financial statements, as the Company's treatment of the relevant affected items within its consolidated statement of cash flows is consistent with the requirements of this guidance. In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. This standard is intended to simplify several areas of accounting for share-based compensation arrangements, including the income tax impact, classification on the statement of cash flows and forfeitures. ASU 2016-09 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016, and early adoption is permitted. The ASU will be effective for the Company in the first quarter of 2017. The Company does not expect this ASU to have a material impact on its consolidated financial statements. In February, 2016, the FASB issued ASU 2016-02, Leases. The standard will affect all entities that lease assets and will require lessees to recognize a lease liability and a right-of-use asset for all leases (except for short-term leases that have a duration of less than one year) as of the date on which the lessor makes the underlying asset available to the lessee. For public companies, the new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. For leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, lessees and lessors must apply a modified retrospective transition approach. The Company is still evaluating the effect that this guidance will have on its consolidated financial statements and related disclosures. In April 2015, the FASB issued ASU 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. The new standard requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The Company adopted this standard retrospectively in the first quarter of 2016. The balance sheet as of December 31, 2015 was retrospectively adjusted, which resulted in reductions to other assets of $0.1 million and long-term debt of $0.1 million. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), which amends the existing accounting standards for revenue recognition. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, which delays the effective date of ASU 2014-09 by one year. The FASB also agreed to allow entities to choose to adopt the standard as of the original effective date. In March 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net), which clarifies the implementation guidance on principal versus agent considerations. The guidance includes indicators to assist an entity in determining whether it controls a specified good or service before it is transferred to the customers. The new revenue recognition standard will be effective for the Company in the first quarter of 2018, with the option to adopt it in the first quarter of 2017. The Company currently anticipates adopting the new standard effective January 1, 2018. The new standard also permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), or retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (the modified retrospective method). The Company currently anticipates adopting the standard using the modified retrospective method. The Company is still in the process of completing its analysis on the impact this guidance will have on its consolidated financial statements and related disclosures. Fair Value Measurements Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. Accounting standards describe a fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value which are the following: Level 1—Quoted prices in active markets for identical assets or liabilities or funds. Level 2—Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Contingent Consideration Liability The Company recorded a contingent consideration liability upon the acquisition of Svensk Krisledning AB, or Crisis Commander, on December 30, 2016 (See Note 5). Contingent consideration is measured at fair value and is based on significant inputs not observable in the market, which represents a Level 3 measurement within the fair value hierarchy. The valuation of contingent consideration uses assumptions the Company believes would be made by a market participant. The Company assesses these estimates on an on-going basis as additional data impacting the assumptions is obtained. Changes in the fair value of contingent consideration related to updated assumptions and estimates are recognized within the consolidated statements of operations and comprehensive loss. The Company determined the fair value of the contingent consideration using the probability adjusted discounted cash flow method. The significant unobservable inputs used in the fair value measurement of contingent consideration are the probabilities of achieving sales milestones, the period in which these milestones are expected to be achieved, and discount rates. At December 31, 2016, it was determined to be probable that the Company would achieve the sales milestones as included in the Crisis Commander purchase agreement. This resulted in the recognition of an obligation of $0.4 million at December 31, 2016, which is classified under other long term liabilities. There was no change in the fair value of contingent consideration liability during the year ended December 31, 2016. Significant increases or decreases in the probabilities of achieving the milestones would result in a significantly higher or lower fair value measurement, respectively. Significant increases or decreases in the period in which milestones will be achieved would result in a significantly lower or higher fair value measurement, respectively. The Company expects to pay the contingent consideration in March of 2018. Concentrations of Credit and Business Risk Financial instruments that potentially subject the Company to a concentration of credit risk consist of cash, cash equivalents and accounts receivable. The Company maintains cash and cash equivalent balances at several banks. Accounts located in the United States are insured by the Federal Deposit Insurance Corporation, or 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 located in the United States and the United Kingdom and are generally denominated in U.S. dollars 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 years ended December 31, 2016 and 2015. No single customer comprised more than 10% of the Company’s accounts receivable balance at December 31, 2016 and 2015. Cash and Cash Equivalents The Company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. Cash equivalents consist of funds deposited into money market funds. Cash and cash equivalents are stated at cost which approximates fair value. Accounts Receivable Accounts receivable includes trade accounts receivables from the Company’s customers, net of an allowance for doubtful accounts. Accounts receivable are recorded at the invoiced amount and do not bear interest. Allowance for doubtful accounts is established based on various factors including credit profiles of the Company’s customers, historical payments and current economic trends. The Company reviews its allowance by assessing individual accounts receivable over a specific aging and amount and all other balances are pooled based on historical collection experience. Accounts receivable are written-off on a case by case basis, net of any amounts that may be collected. Deferred Commissions The Company capitalizes commission costs earned by sales personnel that are incremental and directly related to the acquisition of customer contracts. Commission costs are accrued and capitalized upon execution of the sales contract by the customer. Payments to sales personnel are made shortly after the receipt of the related customer payment. Commissions are earned based on annual billings and are not earned on multi-year contracts until the annual billing is renewed. Deferred commissions are amortized over the commissionable portion of the contract which is subject to clawback should the customer cancel, which generally can only occur if the Company materially fails to perform under the contract. Amortization of deferred commissions is included in sales and marketing expenses in the accompanying consolidated statements of operations and comprehensive loss. Deferred commissions, net of amortization, are included in other assets in the accompanying consolidated balance sheet. Deferred Offering Costs Deferred offering costs consist primarily of direct incremental costs related to the Company’s proposed IPO of its common stock. Upon the completion of the Company’s IPO in September 2016, $3.6 million was offset against the proceeds of the offering. Property and Equipment, Net Property and equipment are stated at cost, less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets, which is generally three years for computer software, office computers and system software, five years for system hardware and furniture and equipment, and over the shorter of lease term or useful life of the assets for leasehold improvements. Maintenance and repairs are expensed as incurred. When assets are retired or otherwise disposed of, the cost and related accumulated depreciation are removed from the accounts and any resulting gain or loss is reflected in the Company’s results of operations. Assets held under capital lease are recorded at the net present value of the minimum lease payments of the leased asset at the inception of the lease. Depreciation expense is computed using the straight-line method over the shorter of the estimated useful lives of the asset or the period of the related lease for leasehold improvements. Capitalized Software Development Costs The Company capitalizes the costs of software developed or obtained for internal use in accordance with ASC Topic 350-40, Internal Use Software. Capitalized software development costs consist of costs incurred during the application development stage and include purchased software licenses, implementation costs, consulting costs, and payroll-related costs for projects that qualify for capitalization. These costs relate to major new functionality. All other costs, primarily related to maintenance and minor software fixes, are expensed as incurred. The Company amortizes the capitalized software development costs on a straight-line basis over the estimated useful life of the software, which is generally three years, beginning when the asset is substantially ready for use. The amortization of capitalized software development costs is reflected in cost of revenue. Business Combinations The results of businesses acquired in a business combination are included in the Company’s consolidated financial statements from the date of acquisition. Purchase accounting results in assets and liabilities of an acquired business being recorded at their estimated fair values on the acquisition date. Any excess consideration over the value of the assets acquired and liabilities assumed is recognized as goodwill. The Company performs valuations of assets acquired and liabilities assumed on each acquisition accounted for as a business combination, and allocates the purchase price to the tangible and intangible assets acquired and liabilities assumed based on its best estimate of fair value. Acquired intangible assets include: tradenames, customer relationships, and developed technology. The Company determines the appropriate useful life of intangible assets by performing an analysis of cash flows based on historical experience of the acquired businesses. Intangible assets are amortized over their estimated useful lives based on the pattern in which the economic benefits associated with the asset are expected to be consumed, which to date has approximated the straight-line method of amortization. The estimated useful lives for tradenames, customer relationships, and technology are generally, two to seven years, five years, and two to three years, respectively. Long Lived Assets The Company evaluates the recoverability of its long lived assets with finite useful lives for impairment whenever events or changes in circumstances indicate that the carrying amounts may not be recoverable. The Company performs impairment testing at the asset group level that represents the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets and liabilities. If events or changes in circumstances indicate that the carrying amount of an asset group may not be recoverable and the expected undiscounted future cash flows attributable to the asset group are less than the carrying amount of the asset group, an impairment loss equal to the excess of the asset’s carrying value over its fair value is recorded. Fair value is determined based upon estimated discounted future cash flows, if any. Goodwill Goodwill represents the excess of the aggregate purchase price paid over the fair value of the net assets acquired in our business combinations. Goodwill is not amortized and is tested for impairment at least annually or whenever events or changes in circumstances indicate that the carrying value may not be recoverable. Events or changes in circumstances that could trigger an impairment review include a significant adverse change in business climate, an adverse action or assessment by a regulator, unanticipated competition, a loss of key personnel, significant changes in the manner of our use of the acquired assets or the strategy for our overall business, significant negative industry or economic trends, or significant underperformance relative to expected historical or projected future results of operations. The Company has the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying value, including goodwill. If, after assessing the totality of events or circumstances, the Company determines that it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, additional impairment testing is not required. However, if the Company concludes otherwise, the Company is required to perform the first step of a two-step impairment test. Alternatively, the Company may elect to proceed directly to the first step of the two-step impairment test and bypass the qualitative assessment. The first step of the impairment test involves comparing the estimated fair value of a reporting unit with its book value, including goodwill. If the estimated fair value exceeds book value, goodwill is considered not to be impaired and no additional steps are necessary. If, however, the fair value of the reporting unit is less than book value, the carrying amount of the goodwill is compared to its implied fair value. The estimate of implied fair value of goodwill may require valuations of certain internally generated and unrecognized intangible assets. If the carrying amount of goodwill exceeds the implied fair value of that goodwill, an impairment loss is recognized in an amount equal to the excess. The Company tests for goodwill impairment annually on November 30. The Company performed a qualitative goodwill assessment at November 30, 2016 and concluded there was no impairment based on consideration of a number of factors, including the improvement in the Company’s key operating metrics over the prior year, improvement in the strength of the general economy and the Company’s continued execution against its overall strategic objectives. Based on the foregoing, the Company determined that it was not more likely than not that the fair value of its reporting unit is less than its carrying amount and therefore that no further impairment testing was required. Revenue Recognition The Company derives substantially all of its revenue from contract subscription fees for use of its applications. The Company recognizes revenues in accordance with ASC 605, and accordingly revenue is recognized when persuasive evidence of an arrangement exists, delivery has occurred, the fee is fixed or determinable, collectability is reasonably assured and acceptance criteria, if any, have been met. If any of these criteria are not met, revenue recognition is deferred until such time that all of the criteria are met. The Company’s subscription arrangements do not provide customers with the right to take possession of the software at any time. Subscription Revenue Subscription revenue is recognized ratably over the initial subscription period committed by the customer commencing when the customer’s environment has been created in the Company’s hosted environment. The initial subscription period is typically one to three years and the level of service provided each customer varies based on the level of service required by the complexity of a customer’s business. The level of service also specifies the level of usage by the customer in terms of minutes or data used to transmit the notifications. In the event actual usage exceeds the level purchased, overages are invoiced and are recorded as revenue during the service period. The subscription services are noncancelable, although customers have the right to terminate their contracts if the Company materially fails to perform. The Company generally invoices the Company’s customers in advance in annual installments for the subscription fees, including the set-up fees on the first annual invoice. Other Revenue The Company recognizes revenue for set-up fees, which historically have not been material to the Company’s financial statements. The Company has concluded that set-up fees do not meet the criteria for separation from the Company’s primary service as they do not have stand-alone value as the Company has historically not sold set-up fees separately. Since set-up fees are charged for substantially all new applications and services, they are recognized ratably over the contractual period, which approximates the life of the application. The Company also sells professional services, which have been immaterial to date. Deferred Revenue Deferred revenue includes amounts collected or billed in excess of recognizable revenue. Such amounts are recognized by the Company over the life of the contract upon meeting the revenue recognition criteria. Deferred revenue that will be recognized during the succeeding 12-month period is recorded as current deferred revenue and the remaining portion is recorded as non-current deferred revenue. Cost of Revenue Cost of revenue includes expenses related to the fulfillment of the Company’s 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. Advertising Expenses Advertising expenses to promote the Company’s services are expensed as incurred. Advertising expenses included in sales and marketing expense were $1.1 million, $0.8 million and $0.3 million for the years ended December 31, 2016, 2015 and 2014, respectively. Research and Development Research and development expenses primarily consist of employee-related costs for research and development staff, including salaries, bonuses, benefits and stock-based compensation and the cost of certain third-party service providers related to the development of the Company’s solutions that do not meet the criteria to be capitalized under ASC Topic 350-40, Internal Use Software. Stock-Based Compensation Stock-based compensation expense is comprised of stock options, which are issued under the Company’s 2008 and 2016 equity incentive plans, and restricted stock awards, or RSAs, and employee stock purchase plan awards. Stock-based compensation related to stock options and RSAs is measured at the grant date based on the fair value of the award and is recognized straight-line as expense, net of estimated forfeitures, over the requisite service period, which is generally the vesting period of the respective award. The Company utilizes the Black-Scholes pricing model for determining the estimated fair value of the stock options and RSAs. The Black-Scholes pricing model requires the use of subjective assumptions including the option’s expected term, the volatility of the underlying stock, the fair value of the stock and the expected forfeiture rate. Income Taxes The Company accounts for income taxes using the asset and liability method of accounting for income taxes in which deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized as income in the period that includes the enactment date. A valuation allowance is established if it is more likely than not that all or a portion of the deferred tax asset will not be realized. The calculation of the Company’s tax liabilities involves dealing with uncertainties of the application of complex tax regulations. The Company recognizes liabilities for uncertain tax positions based on a two-step approach. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates it is more likely than not, that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount, which is more than 50% likely of being realized upon ultimate settlement. The Company considers many factors when evaluating and estimating its tax positions and tax benefits, which may require periodic adjustments. Foreign Currency Translation The functional currency for the Company’s foreign subsidiaries is the local currency. For those subsidiaries, the assets and liabilities are translated into U.S. dollars at the exchange rate method at the balance sheet date. Income and expenses are translated at the average exchange rates for the period. Foreign currency exchange gain and losses are recorded in other expenses. Other Comprehensive Income (Loss) For all periods presented, the Company’s other comprehensive income (loss) is comprised of foreign currency translation adjustments related to the Company’s foreign subsidiaries. Net Loss Per Share Attributable to Common Stockholders Basic net loss per share attributable to common stockholders is computed by dividing the Company’s net loss attributable to common stockholders by the weighted-average number of common shares used in the loss per share calculation during the period. Diluted net loss per share attributable to common stockholders is computed by giving effect to all potentially dilutive securities, including stock options, restricted stock awards and warrants. Basic and diluted net loss per share attributable to common stockholders was the same for all periods presented as the inclusion of all potentially dilutive securities outstanding was anti-dilutive.

Accounts Receivable, Net

12 Months Ended

Dec. 31, 2016

Accounts Receivable Net [Abstract]

Accounts Receivable, Net

(3) Accounts Receivable, Net

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

	As of December 31,
	2016			2015
Accounts receivable	$	18,231		$	16,080
Allowance for doubtful accounts		(419	)		(381	)
Net accounts receivable	$	17,812		$	15,699

Bad debt expense for the years ended December 31, 2016, 2015 and 2014 was $0.4 million, $0.4 million and $0.2 million, respectively.

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

	As of December 31,
	2016			2015
Allowance, at beginning of period	$	(381	)	$	(282	)
Charged to bad debt expense		(387	)		(366	)
Write-offs, net of recoveries		349			267
Allowance, at end of period	$	(419	)	$	(381	)

- Definition

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.

+ References + Details

Property and Equipment

12 Months Ended

Dec. 31, 2016

Property Plant And Equipment [Abstract]

Property and Equipment

(4) Property and Equipment

Property and equipment consists of the following at December 31, 2016 and 2015 (in thousands):

	'Useful life		As of December 31,
	in years		2016			2015
Furniture and equipment		5	$	928		$	822
System hardware		5		3,320			6,495
Office computers		3		1,777			2,003
Computer and system software		3		1,478			1,341
				7,503			10,661
Less accumulated depreciation and amortization				(4,580	)		(7,041	)
Property and equipment, net			$	2,923		$	3,620

Depreciation and amortization expense for the years ended December 31, 2016, 2015 and 2014 was $1.7 million, $1.4 million and $0.7 million, respectively.

Goodwill

12 Months Ended

Dec. 31, 2016

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill

(5) Goodwill

Goodwill was $9.7 million and $7.8 million as of December 31, 2016 and 2015, respectively. There were no impairments recorded against goodwill in 2016, 2015 or 2014. The following table displays the changes in the gross carrying amount of goodwill (in thousands):

	Amount
Balance at December 31, 2015 and 2014	$	7,839
Crisis Commander acquisition		1,837
Balance at December 31, 2016	$	9,676

Acquisition

On December 30, 2016, the Company completed the acquisition of Crisis Commander, a privately held SaaS mobile crisis management company based out of Norsburg, Sweden. The acquisition was consummated pursuant to a purchase agreement for an initial preliminary purchase price of $2.7 million, subject to earn out payments contingent on meeting certain revenue thresholds which are expected to be paid in March 2018.

The excess of purchase consideration over the fair value of net tangible liabilities assumed and identifiable intangible assets acquired was recorded as goodwill. The fair values assigned to tangible and identifiable intangible assets acquired and liabilities assumed are based on management’s estimates and assumptions. The estimated fair values of assets acquired and liabilities assumed may be subject to change as additional information is received. Thus, the provisional measurements of fair value have been recorded.

The goodwill balance is primarily attributed to the anticipated synergies from the acquisition and expanded market opportunities with respect to the integration of Crisis Commander’s platform with the Company's other solutions. The goodwill balance is not deductible for U.S. income tax purposes.

The assets and results of operations of Crisis Commander were not significant to the Company’s consolidated financial position or results of operations, and thus pro forma information is not presented.

Fair Value Measurements

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Fair Value Measurements

(6) Fair Value Measurements

The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable, capital leases and accrued liabilities approximate fair value because of the short maturity of these items. The fair value of the Company’s revolving line of credit and term loan approximates carrying value based on the Company’s current incremental borrowing rate for similar types of borrowing arrangements. The fair value of the Company’s notes payable approximates carrying value due to the short term nature of the arrangement.

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 years ended December 31, 2016 and 2015, no impairments were identified of those assets requiring measurement at fair value on a non-recurring basis.

The following table summarizes the Company's financial assets and liabilities measured at fair value on a recurring basis at December 31, 2016 by level within the fair value hierarchy. There were no financial assets and liabilities that were required to be measured at fair value basis on a non-recurring basis at December 31, 2015. 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:

	At December 31, 2016
	Quoted		Significant
	Prices in		Other		Significant
	Active		Observable		Unobservable
	Markets		Inputs		Inputs		Total Fair
	(Level 1)		(Level 2)		(Level 3)		Value
	(in thousands)
Assets:
Money market funds (included in cash and cash equivalents)	$	57,032		—		—	$	57,032
Total financial assets	$	57,032	$	—	$	—	$	57,032
Liabilities:
Contingent consideration		—		—	$	388	$	388
Total financial liabilities	$	—	$	—	$	388	$	388

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

	Amount
Fair value at December 31, 2015	$	—
Contingent consideration from acquisition		388
Fair value at December 31, 2016	$	388

There were no level 3 financials instruments for the year ended December 31, 2015.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Capitalized Software Development Costs

12 Months Ended

Dec. 31, 2016

Research And Development [Abstract]

Capitalized Software Development Costs

(7) Capitalized Software Development Costs

Capitalized software development costs consisted of the following at December 31, 2016 and 2015 (in thousands):

				As of December 31, 2016
	Gross carrying amount		Amortization period	Accumulated amortization			Net carrying amount
Capitalized software development costs	$	30,658	3 years	$	(21,866	)	$	8,792
Total capitalized software development costs	$	30,658		$	(21,866	)	$	8,792

				As of December 31, 2015
	Gross carrying amount		Amortization period	Accumulated amortization			Net carrying amount
Capitalized software development costs	$	25,119	3 years	$	(16,941	)	$	8,178
Total capitalized software development costs	$	25,119		$	(16,941	)	$	8,178

The Company capitalized software development costs of $5.5 million and $4.9 million during the years ended December 31, 2016 and 2015, respectively.

The total amortization expense related to capitalized software development costs for the years ended December 31, 2016, 2015 and 2014 was $4.9 million, $3.0 million and $0.8 million, respectively. Amortization of capitalized software development costs is classified within cost of revenue in the consolidated statements of operations and comprehensive loss.

The expected amortization, as of December 31, 2016, for each of the next three years is as follows:

Year ending December 31:

	(in thousands)
2017	$	4,361
2018		2,844
2019		1,587
	$	8,792

- Definition

The entire disclosure for research, development, and computer software activities, including contracts and arrangements to be performed for others and with federal government. Includes costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility and in-process research and development acquired in a business combination consummated during the period.

+ References + Details

Intangible Assets

12 Months Ended

Dec. 31, 2016

Goodwill And Intangible Assets Disclosure [Abstract]

Intangible Assets

(8) Intangible Assets

Intangible assets consisted of the following finite lived intangible assets at December 31, 2016 and 2015 (in thousands):

				As of December 31, 2016
	Gross carrying amount		Weighted-average life (years)	Accumulated amortization			Net carrying amount
Amortizable intangible assets:
Developed technology	$	1,490	3.60	$	(878	)	$	612
Tradenames		883	6.08		(254	)		629
Customer relationships		4,779	5.00		(2,080	)		2,699
Total intangible assets	$	7,152		$	(3,212	)	$	3,940

				As of December 31, 2015
	Gross carrying amount		Weighted-average life (years)	Accumulated amortization			Net carrying amount
Amortizable intangible assets:
Developed technology	$	1,211	3.07	$	(763	)	$	448
Tradenames		582	5.55		(223	)		359
Customer relationships		4,941	5.00		(1,629	)		3,312
Total intangible assets	$	6,734		$	(2,615	)	$	4,119

Total amortization expense for the years ended December 31, 2016, 2015 and 2014 was $1.2 million, $1.5 million and $1.0 million, respectively. Amortization expense of tradenames and customer relationships is included within general and administrative expenses, while amortization of developed technology is included in cost of revenue. The Company recorded amortization expense attributed to developed technology of $0.2 million, $0.4 million and $0.2 million for the period ended December 31, 2016, 2015 and 2014, respectively.

The expected amortization of the intangible assets, as of December 31, 2016, for each of the next five years and thereafter is as follows:

	(in thousands)
2017	$	1,392
2018		1,221
2019		772
2020		262
2021		263
Thereafter		30
	$	3,940

Income Taxes

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Income Taxes

(9) Income Taxes

The components of loss before income taxes are as follows:

	Year Ended December 31,
	2016			2015			2014
	(in thousands)
Domestic	$	(8,572	)	$	(8,016	)	$	395
Foreign		(2,738	)		(3,370	)		(1,107	)
Total	$	(11,310	)	$	(11,386	)	$	(712	)

For purposes of the reconciling the Company’s provision for income taxes at the statutory rate and the Company’s provision (benefit) for income taxes at the effective tax rate, a notional 34% tax rate was applied as follows:

	Year Ended December 31,
	2016			2015			2014
	(in thousands)
Income tax at federal statutory rate	$	(3,846	)	$	(3,871	)	$	(242	)
Increase/(Decrease) in tax resulting from:
State income tax expense, net of federal tax effect		(183	)		(103	)		9
Nondeductible permanent items