COMMITMENTS AND CONTINGENCIES (Details Narrative) - USD ($)		12 Months Ended
Feb. 29, 2016	Jun. 30, 2023	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Rent Expense		$ 5,887,000	$ 5,668,000
Property Tax Abatement From Suffolk County IDA	50.00%
Property Tax Abatement	$ 440,000
Employee Stock Ownership Plan (ESOP), Cash Contributions to ESOP		36,523	0
Liability for individual claims		110,000
Liability for Claims and Claims Adjustment Expense, Disability, Accident and Health		$ 101,000	$ 79,000

This represents the amount of lease and rental expenses during year.

No definition available.

Name:	FONR_LeaseAndRentalExpenses
Namespace Prefix:	FONR_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This represents the amount of property tax abatement during year.

+ References

No definition available.

+ Details

Name:	FONR_PropertyTaxAbatement
Namespace Prefix:	FONR_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This represents the rate of property tax abatement from Suffolk county ida during year.

+ References

No definition available.

+ Details

Name:	FONR_PropertyTaxAbatementFromSuffolkCountyIda
Namespace Prefix:	FONR_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This represents the amount of stop loss umbrella policy with 3 rd paryinsurer to limit maximum potential liability for individual claims during year.

+ References

No definition available.

+ Details

Name:	FONR_StoplossUmbrellaPolicyWith3RdParyinsurerToLimitMaximumPotentialLiabilityForIndividualClaims
Namespace Prefix:	FONR_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

This item represents the amount of cash contributions during the period made by the entity to the Employee Stock Ownership Plan (ESOP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 40
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480489/718-40-50-1

+ Details

Name:	us-gaap_EmployeeStockOwnershipPlanESOPCashContributionsToESOP
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount needed to reflect the estimated ultimate cost of settling claims relating to disability, accident and health insurance insured events that have occurred on or before a particular date (ordinarily, the balance sheet date) and the amount needed to provide for the estimated ultimate cost required to investigate and settle claims relating to insured events that have occurred on or before a particular date (ordinarily, the balance sheet date), whether or not reported to the insurer at that date.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480081/944-40-50-3

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (cc)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480081/944-40-50-3

+ Details

Name:	us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseDisabilityAccidentAndHealth
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant