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Document And Entity Information - USD ($)
 12 Months Ended
Apr. 30, 2024
Jun. 30, 2024
Oct. 31, 2023
Document Information [Line Items]      
Entity, Registrant Name VALUE LINE, INC.    
Current Fiscal Year End Date --04-30    
Document, Fiscal Year Focus 2024    
Document, Fiscal Period Focus FY    
Document, Type 10-K/A    
Document, Annual Report true    
Document, Period End Date Apr. 30, 2024    
Document, Transition Report false    
Entity, File Number 0-11306    
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     $ 32,483,588
Entity, Common Stock Shares, Outstanding   9,418,839  
Auditor Name Horowitz & Ullmann, P.C.    
Auditor Firm ID 921    
Auditor Location New York, NY    
Amendment Description On July 26, 2024, Value Line, Inc. (the “Company”) filed its Annual Report on Form 10-K (the “Original Form 10-K”) for the fiscal year ended April 30, 2024 with the Securities and Exchange Commission (“SEC”). The purpose of this Amendment No. 1 (the “Amendment”) to the Original Form 10-K is to include Part I Item 1C, Cybersecurity, which was inadvertently omitted in the Original Form 10-K.   No other items of the Original Form 10-K are being amended and this Amendment does not reflect any events occurring after the filing of the Original Form 10-K. Accordingly, the Amendment should be read in conjunction with the Original Form 10-K and the Company’s other filings made with the SEC subsequent to the filing of the Original Form 10-K.    
Amendment Flag true    
Entity, Central Index Key 0000717720