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ACCOUNTS RECEIVABLE, MEDICAL RECEIVABLE AND MANAGEMENT AND OTHER FEES RECEIVABLE - Total Facilities (Details) - Integer | 12 Months Ended
--- | ---
Jun. 30, 2024 | Jun. 30, 2023
Receivables [Abstract] |  |
Total Facilities Owned or Managed (at Beginning of Year) | 27 | 27
Internal development | 1 | 1
Managed Facilities Closed | 0 | (1)
Total Facilities Owned or Managed (at End of Year) | 28 | 27

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- References No definition available. + Details
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Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
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Namespace Prefix: | FONR_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | FONR_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | FONR_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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