Document and Entity Information - USD ($)	12 Months Ended
	Apr. 30, 2015	Jun. 30, 2015	Oct. 31, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	VALUE LINE INC
Entity Central Index Key	0000717720
Trading Symbol	valu
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Current Fiscal Year End Date	--04-30
Entity Filer Category	Non-accelerated Filer
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding		9,803,261
Entity Public Float			$ 18,406,297
Document Type	10-K
Document Period End Date	Apr. 30, 2015
Amendment Flag	false
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY