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NOTE 3 - ACCOUNTS RECEIVABLE, MEDICAL RECEIVABLE AND MANAGEMENT AND OTHER FEES RECEIVABLE - Total Facilities (Details) - Integer | 12 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Receivables [Abstract] |  |
Total Facilities Owned or Managed (at Beginning of Year) | 25 | 26
Acquisition | 1 |
Internal development | 1 |
Managed Facilities Closed |  | (1)
Total Facilities Owned or Managed (at End of Year) | 27 | 25

X
- Definition The Company's receivables from the related and non-related professional corporations (PS's) substantially consist of fees outstanding under management agreements. Set forth in the table are the number of facilities for the fiscal year-end. + References No definition available. + Details
Name: | FONR_ManagedFacilitiesAddedAcquisition
Namespace Prefix: | FONR_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The Company's receivables from the related and non-related professional corporations (PS's) substantially consist of fees outstanding under management agreements. Set forth in the table are the number of facilities for the fiscal year-end. + References No definition available. + Details
Name: | FONR_ManagedFacilitiesAddedByInternalDevelopment
Namespace Prefix: | FONR_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The Company's receivables from the related and non-related professional corporations (PS's) substantially consist of fees outstanding under management agreements. Set forth in the table are the number of facilities for the fiscal year-end. + References No definition available. + Details
Name: | FONR_ManagedFacilitiesClosedDuringYear
Namespace Prefix: | FONR_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The Company's receivables from the related and non-related professional corporations (PS's) substantially consist of fees outstanding under management agreements. Set forth in the table are the number of facilities for the fiscal year-end. + References No definition available. + Details
Name: | FONR_TotalFacilitiesOwnedOrManagedAtBeginningOfYear
Namespace Prefix: | FONR_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The Company's receivables from the related and non-related professional corporations (PS's) substantially consist of fees outstanding under management agreements. Set forth in the table are the number of facilities for the fiscal year-end. + References No definition available. + Details
Name: | FONR_TotalFacilitiesOwnedOrManagedAtEndOfYear
Namespace Prefix: | FONR_
Data Type: | xbrli:integerItemType
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