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Document And Entity Information - USD ($)
 12 Months Ended
Apr. 30, 2022
Jul. 18, 2022
Oct. 29, 2021
Document And Entity Information      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Entity File Number 1-4702    
Amendment Flag false    
Document Period End Date Apr. 30, 2022    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Entity Registrant Name AMREP CORP.    
Entity Incorporation, State or Country Code OK    
Entity Tax Identification Number 59-0936128    
Entity Central Index Key 0000006207    
Entity Address, Address Line One 850 West Chester Pike, Suite 205    
Entity Address, City or Town Havertown    
Entity Address, State or Province PA    
Entity Address, Postal Zip Code 19083    
City Area Code 610    
Local Phone Number 487-0905    
Current Fiscal Year End Date --04-30    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   5,254,909  
Title of 12(b) Security Common Stock $0.10 par value    
Trading Symbol AXR    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Public Float     $ 53,336,749
Auditor Name Marcum LLP    
Auditor Firm ID 688    
Auditor Location Philadelphia, Pennsylvania