Document and Entity Information - USD ($)	12 Months Ended
	Jun. 30, 2017	Sep. 14, 2017	Dec. 30, 2016
Document And Entity Information
Entity Registrant Name	Fonar Corporation
Entity Central Index Key	0000355019
Document Type	10-K
Document Period End Date	Jun. 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
Entity Public Float			$ 114,000,000
Entity Common Stock, Shares Outstanding		6,287,511
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2017