XML 4 R1.htm IDEA: XBRL DOCUMENT v3.25.2
Document and Entity Information - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Mar. 31, 2025
Jun. 23, 2025
Sep. 30, 2024
Cover [Abstract]      
Entity Registrant Name OLD MARKET CAPITAL CORPORATION    
Entity Central Index Key 0001000045    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Current Fiscal Year End Date --03-31    
Entity Filer Category Non-accelerated Filer    
Entity Well-known Seasoned Issuer No    
Document Type 10-K/A    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Mar. 31, 2025    
Amendment Flag false    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Document Financial Statement Error Correction [Flag] false    
Entity Interactive Data Current Yes    
Entity File Number 0-26680    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 59-2506879    
Entity Address, Address Line One 1601 Dodge St.    
Entity Address, Address Line Two Suite 3350    
Entity Address, City or Town Omaha    
Entity Address, State or Province NE    
Entity Address, Postal Zip Code 68102    
City Area Code 531    
Local Phone Number 867-3631    
Title of 12(b) Security Common Stock    
Trading Symbol OMCC    
Security Exchange Name NASDAQ    
Documents Incorporated by Reference

Portions of the registrant’s definitive Proxy Statement for the 2025 Annual General Meeting of Shareholders are incorporated by reference into Part III, Items 10 through 14, of this Annual Report on Form 10-K.

    
Entity Public Float     $ 42.3
Entity Common Stock, Shares Outstanding   6.7