Cover
Cover - USD ($) $ in Billions | 12 Months Ended | ||
Dec. 31, 2021 | Apr. 06, 2022 | Jun. 30, 2021 | |
Cover [Abstract] | |||
Document Type | 10-K/A | ||
Amendment Flag | false | ||
Document Annual Report | true | ||
Document Transition Report | false | ||
Document Period End Date | Dec. 31, 2021 | ||
Document Fiscal Period Focus | FY | ||
Document Fiscal Year Focus | 2021 | ||
Current Fiscal Year End Date | --12-31 | ||
Entity File Number | 001-36067 | ||
Entity Registrant Name | Mandiant, Inc. | ||
Entity Central Index Key | 0001370880 | ||
Entity Tax Identification Number | 20-1548921 | ||
Entity Incorporation, State or Country Code | DE | ||
Entity Address, Address Line One | 11951 Freedom Drive, 6th Floor | ||
Entity Address, City or Town | Reston | ||
Entity Address, State or Province | VA | ||
Entity Address, Postal Zip Code | 20190 | ||
City Area Code | 703 | ||
Local Phone Number | 935-1700 | ||
Title of 12(b) Security | Common Stock, par value $0.0001 per share | ||
Trading Symbol | MNDT | ||
Security Exchange Name | NASDAQ | ||
Entity Well-known Seasoned Issuer | Yes | ||
Entity Voluntary Filers | No | ||
Entity Current Reporting Status | Yes | ||
Entity Interactive Data Current | Yes | ||
Entity Filer Category | Large Accelerated Filer | ||
Entity Small Business | false | ||
Entity Emerging Growth Company | false | ||
Entity Shell Company | false | ||
Entity Public Float | $ 4.8 | ||
Entity Common Stock, Shares Outstanding | 233,978,294 | ||
ICFR Auditor Attestation Flag | true | ||
Auditor Firm ID | 34 | ||
Auditor Name | Deloitte & Touche LLP | ||
Auditor Location | San Jose, CA |