Document and Entity Information (USD $)	12 Months Ended
	Apr. 30, 2012	Jun. 29, 2012	Oct. 31, 2011
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		9,896,381
Entity Public Float			$ 15,921,991
Document Type	10-K
Document Period End Date	Apr. 30, 2012
Amendment Flag	false
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY