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NOTE 17 - SEGMENT AND RELATED INFORMATION (Details Narrative)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting [Abstract]
[custom:ExportSalesOfMedicalEquipmentPercentage]	69.30%	20.20%
[custom:ForeignRevenuesOfServiceAndRepairOfMedicalEquipmentPercentage]	4.50%	5.60%

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- References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

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