Business and Nature of Operations	12 Months Ended
Dec. 31, 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, Risk Intelligence 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. Follow-On Public Offering In January 2019, the Company completed a follow-on public offering in which the Company sold 2,645,000 shares of its common stock, which included 345,000 shares sold pursuant to the exercise by the underwriters of an option to purchase additional shares, at a public offering price of $55.25 per share. The Company received net proceeds of $139.1 million, after deducting underwriting discounts and commissions. Convertible Senior Notes In December 2019, the Company issued $450 million aggregate principal amount of 0.125% convertible senior notes due December 15, 2024 (the “2024 Notes”). The 2024 Notes will mature on December 15, 2024, unless earlier redeemed or repurchased by the Company or converted by the holder pursuant to their terms. In connection with the issuance of the 2024 Notes, the Company entered into capped call transactions with certain counterparties affiliated with the initial purchasers and other financial institutions. The cost of the purchased capped calls was $44.9 million. The capped call transactions are expected to reduce potential dilution of earnings per share upon conversion of the 2024 Notes. In connection with the issuance of the 2024 Notes in December 2019, the Company paid $57.8 million to repurchase $23.0 million principal balance of its 1.50% convertible senior notes due 2022 (the “2022 Notes”). The Company also partially terminated capped call options entered into in connection with the 2022 Notes during fiscal year 2019 and received $5.8 million.

Business and Nature of Operations

12 Months Ended

Dec. 31, 2019

Organization Consolidation And Presentation Of Financial Statements [Abstract]

(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, Risk Intelligence 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.

Follow-On Public Offering

In January 2019, the Company completed a follow-on public offering in which the Company sold 2,645,000 shares of its common stock, which included 345,000 shares sold pursuant to the exercise by the underwriters of an option to purchase additional shares, at a public offering price of $55.25 per share. The Company received net proceeds of $139.1 million, after deducting underwriting discounts and commissions.

Convertible Senior Notes

In December 2019, the Company issued $450 million aggregate principal amount of 0.125% convertible senior notes due December 15, 2024 (the “2024 Notes”). The 2024 Notes will mature on December 15, 2024, unless earlier redeemed or repurchased by the Company or converted by the holder pursuant to their terms. In connection with the issuance of the 2024 Notes, the Company entered into capped call transactions with certain counterparties affiliated with the initial purchasers and other financial institutions. The cost of the purchased capped calls was $44.9 million. The capped call transactions are expected to reduce potential dilution of earnings per share upon conversion of the 2024 Notes.

In connection with the issuance of the 2024 Notes in December 2019, the Company paid $57.8 million to repurchase $23.0 million principal balance of its 1.50% convertible senior notes due 2022 (the “2022 Notes”). The Company also partially terminated capped call options entered into in connection with the 2022 Notes during fiscal year 2019 and received $5.8 million.