Document and Entity Information - shares	3 Months Ended
	Sep. 30, 2019	Nov. 06, 2019
Entity Registrant Name	FONAR CORP
Entity Central Index Key	0000355019
Document Type	10-Q
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2020
Current Fiscal Year End Date	--06-30
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity File Number	0-10248
Entity Incorporation State Country Code	DE
Is Entity Interactive Data Current	Yes
Is Entity's Reporting Status Current?	Yes
Is Entity a Small Business	true
Entity Filer Category	Accelerated Filer
Is Entity an Emerging Growth Company	false
Common Shares
Entity Common Stock, Shares Outstanding		6,447,463
Class A Non-Voting Preferred Stock
Entity Common Stock, Shares Outstanding		313,438
Class C Common Stock
Entity Common Stock, Shares Outstanding		382,513
Class B Members
Entity Common Stock, Shares Outstanding		146