Document And Entity Information - shares	6 Months Ended
	Oct. 31, 2021	Dec. 07, 2021
Document Information [Line Items]
Entity Central Index Key	0000717720
Entity Registrant Name	VALUE LINE INC
Amendment Flag	false
Current Fiscal Year End Date	--04-30
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2022
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Oct. 31, 2021
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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		9,537,600