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NOTE 19 - ALLOWANCE FOR DOUBTFUL ACCOUNTS - Allowance For Doubtful Accounts (Details) (USD $) - USD ($) | 12 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020
Accounts Receivable [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Beginning Balance |  | $ 514,561 |  | $ 190,244
Additions (Included in provision for bad debts) |  |  | [1] | 380,000
Deductions |  | 72,291 |  | 55,683
Ending Balance |  | 442,270 |  | 514,561
Management And Other Fees Receivable [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Beginning Balance |  | 11,063,233 |  | 9,404,944
Additions (Included in provision for bad debts) |  | 4,723,645 | [1] | 3,526,742
Deductions |  |  |  | (1,868,453)
Ending Balance |  | 15,786,878 |  | 11,063,233
Management And Other Fees Receivable Related Medical Practices [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Beginning Balance |  | 3,322,055 |  | 2,310,731
Additions (Included in provision for bad debts) |  | 862,344 | [1] | 1,011,324
Deductions |  |  |  |
Ending Balance |  | 4,184,399 |  | 3,322,055
Notes Receivable [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Beginning Balance |  | 777,354 |  |
Additions (Included in provision for bad debts) | [1] |  |  |
Deductions |  |  |  |
Ending Balance |  | 777,354 |  | 777,354
Medical Receivables [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Beginning Balance |  | $ 777,354 |  |
Additions (Included in provision for bad debts) |  |  |  | 777,354
Deductions |  |  |  |
Ending Balance |  |  |  | $ 777,354
[1] | Included in provision for bad debts.

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- Definition Allowance For Doubtful Accounts Additions + References No definition available. + Details
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Namespace Prefix: | FONR_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Allowance For Doubtful Accounts Deductions + References No definition available. + Details
Name: | FONR_AllowanceForDoubtfulAccountsDeductions
Namespace Prefix: | FONR_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Definition Amount of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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- Details
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- Details
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- Details
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