Cover - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Sep. 08, 2025	Dec. 31, 2024
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2025
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2025
Current Fiscal Year End Date	--06-30
Entity File Number	0-10248
Entity Registrant Name	FONAR CORPORATION
Entity Central Index Key	0000355019
Entity Tax Identification Number	11-2464137
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	110 Marcus Drive
Entity Address, City or Town	Melville
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	11747
City Area Code	631
Local Phone Number	694-2929
Title of 12(b) Security	Common Stock, $.0001 par value
Trading Symbol	FONR
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float				$ 91.8
Document Financial Statement Error Correction [Flag]	false
ICFR Auditor Attestation Flag	false
Auditor Name	CohnReznick LLP	Marcum LLP
Auditor Location	Melville, NY	New York, NY
Auditor Firm ID	596	688
Common Stock [Member]
Entity Common Stock, Shares Outstanding			6,203,465
Common Class B [Member]
Entity Common Stock, Shares Outstanding			146
Common Class C [Member]
Entity Common Stock, Shares Outstanding			382,513
Class A Non Voting Preferred Stock [Member]
Entity Common Stock, Shares Outstanding			313,438