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NOTE 16 - SEGMENT AND RELATED INFORMATION - Foreign Product Sales - (Details) | 12 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Foreign Product Sales | 530.00% | 4150.00% | 5590.00%
United Arab Emerites |  |  |
Foreign Product Sales |  | 710.00% | 4540.00%
Canada |  |  |
Foreign Product Sales | 30.00% |  |
England |  |  |
Foreign Product Sales | 30.00% | 2990.00% | 480.00%
Germany |  |  |
Foreign Product Sales |  | 450.00% |
Puerto Rico |  |  |
Foreign Product Sales | 470.00% |  | 570.00%

X
- Definition Foreign Product Sales + References No definition available. + Details
Name: | FONR_ForeignProductSales
Namespace Prefix: | FONR_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_StatementGeographicalAxis=country_AE
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_GB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_DE
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_PR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |