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NOTE 3 – ACCOUNTS RECEIVABLE, MEDICAL RECEIVABLE AND MANAGEMENT AND OTHER FEES RECEIVABLE (Details Narrative) | 3 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020
Receivables [Abstract] |  |
Percentage of PC's net revenue derived from no-fault and personal injury protection claim | 66.70% | 66.00%
Percentage of consolidated net revenue from management fees charged to related party medical practices | 11.80% | 12.80%

X
- Definition Percentage of consolidated net revenue from management fees. + References No definition available. + Details
Name: | FONR_PercentageOfConsolidatedNetRevenueFromManagementFees
Namespace Prefix: | FONR_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of PCs net revenue derived from nofault and personal injury protection claims. + References No definition available. + Details
Name: | FONR_PercentageOfPcsNetRevenueDerivedFromNofaultAndPersonalInjuryProtectionClaims
Namespace Prefix: | FONR_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration