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SEGMENT AND RELATED INFORMATION (Details Narrative)	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting [Abstract]
Export sales of medical equipment percentage	1.40%	0.20%
Percentage of service and repair of medical equipment	7.70%	7.40%

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

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

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