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SEGMENT AND RELATED INFORMATION - Foreign Product Sales - (Details) | 12 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Foreign Product Sales | 14.10% | 48.90%
DOMINICAN REPUBLIC |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Foreign Product Sales | 0.00% | 12.00%
CANADA |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Foreign Product Sales | 8.50% | 0.60%
GERMANY |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Foreign Product Sales | 4.90% |
UNITED ARAB EMIRATES |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Foreign Product Sales | 0.70% |
PUERTO RICO |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Foreign Product Sales |  | 36.30%

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- Definition This represents the rate of foreign product sales during year. + References No definition available. + Details
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Namespace Prefix: | FONR_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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