Document and Entity Information - shares	3 Months Ended
	Sep. 30, 2017	Nov. 06, 2017
Entity Registrant Name	Fonar Corporation
Entity Central Index Key	0000355019
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Amendment Flag	false
Current Fiscal Year End Date	--06-30
Is Entity a Well-known Seasoned Issuer?	No
Is Entity a Voluntary Filer?	No
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Accelerated Filer
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2018
Common Shares
Entity Common Stock, Shares Outstanding		6,287,511
Class B Common Stock
Entity Common Stock, Shares Outstanding		146
Class C Common Stock
Entity Common Stock, Shares Outstanding		382,513
Preferred Stock Class A
Entity Common Stock, Shares Outstanding		313,438