XML 15 R1.htm IDEA: XBRL DOCUMENT v3.23.3
Cover - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2023
Nov. 21, 2023
Mar. 31, 2023
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Sep. 30, 2023    
Current Fiscal Year End Date --09-30    
Document Transition Report false    
Entity File Number 001-38532    
Entity Registrant Name i3 Verticals, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 82-4052852    
Entity Address, Address Line One 40 Burton Hills Blvd.    
Entity Address, Address Line Two Suite 415    
Entity Address, City or Town Nashville    
Entity Address, State or Province TN    
Entity Address, Postal Zip Code 37215    
City Area Code 615    
Local Phone Number 465-4487    
Title of 12(b) Security Class A Common Stock, $0.0001 Par Value    
Trading Symbol IIIV    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 562.7
Documents Incorporated by Reference Portions of the registrant’s definitive Proxy Statement for its 2024 Annual Meeting of Stockholders are incorporated by reference into Part III hereof.    
Entity Central Index Key 0001728688    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false    
Class A Common Stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   23,272,496  
Class B Common Stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   10,093,394