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Document And Entity Information - USD ($)
 12 Months Ended
Apr. 30, 2025
Jun. 30, 2025
Oct. 31, 2024
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Apr. 30, 2025    
Document Transition Report false    
Entity File Number 0-11306    
Entity Registrant Name VALUE LINE, INC.    
Entity Incorporation, State or Country Code NY    
Entity Tax Identification Number 13-3139843    
Entity Address, Address Line One 551 Fifth Avenue    
Entity Address, City or Town New York    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 10176-0001    
City Area Code 212    
Local Phone Number 907-1500    
Title of 12(b) Security Common stock, $0.10 par value per share    
Trading Symbol VALU    
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 Non-accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Document Financial Statement Error Correction [Flag] false    
ICFR Auditor Attestation Flag false    
Entity Shell Company false    
Entity Public Float     $ 37,922,887
Entity Common Stock, Shares Outstanding (in shares)   9,409,522  
Auditor Firm ID 921    
Auditor Name Horowitz & Ullmann, P.C.    
Auditor Location New York, NY    
Entity Central Index Key 0000717720    
Current Fiscal Year End Date --04-30    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Amendment Flag false