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NOTE 9 - CONTROLLING AND NONCONTROLLING INTERESTS - Imperial Members Equity (Details) - Imperial Equity | Jun. 30, 2018 USD ($)
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Class A Members |
Opening Members Equity | $ 1,279,446
Distributions | (202,500)
Buyout | 48,054
Redemption | (1,125,000)
Class B Members |
Opening Members Equity | 15,000,446
Ending Members Equity | $ 15,000,446

X
- Definition On January 8, 2015, the Company purchased 20% of the Class A members ownership interest at a cost of $4,971,094. The Company has a 60.4% ownership interest in HDM after this transaction. + References No definition available. + Details
Name: | FONR_Buyout
Namespace Prefix: | FONR_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Distributions to each class of members equity as of June 30, 2016, 2015 and 2014. + References No definition available. + Details
Name: | FONR_Distributions
Namespace Prefix: | FONR_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Ending Members Equity for each class of members equity as of June 30, 2016, 2015 and 2014. + References No definition available. + Details
Name: | FONR_EndingMembersEquity
Namespace Prefix: | FONR_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Opening Members Equity for each class of members equity as of June 30, 2016, 2015 and 2014. + References No definition available. + Details
Name: | FONR_OpeningMembersEquity
Namespace Prefix: | FONR_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Redemption of cash to Class A Members (outside investors) in exchange for percentage of Imperial Managements Services + References No definition available. + Details
Name: | FONR_Redemption
Namespace Prefix: | FONR_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=FONR_ImperialEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |