NOTE 3 - ACCOUNTS RECEIVABLE, MEDICAL RECEIVABLE AND MANAGEMENT AND OTHER FEES RECEIVABLE - Receivables, Net - (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016
Accounts receivable	$ 4,604	$ 4,370
Accounts receivable - Related party	90
Medical Receivables	10,547	10,127
Management and other fees receivable	16,560	15,638
Management and other fees receivable from related medical practices ("PC's")	4,232	4,064
Gross Receivabe
Accounts receivable	4,888	4,654
Accounts receivable - Related party	90
Medical Receivables	28,752	27,579
Management and other fees receivable	29,469	29,584
Management and other fees receivable from related medical practices ("PC's")	4,625	4,457
Allowance for Doubtful Accounts
Accounts receivable	284	284
Accounts receivable - Related party
Medical Receivables	18,205	17,452
Management and other fees receivable	12,909	13,946
Management and other fees receivable from related medical practices ("PC's")	$ 393	$ 393

Accounts receivable from service and repair fees of Related Party MRI scanner customers; net of allowances for doubtful accounts

No definition available.

Name:	FONR_AccountsReceivableNetRelatedParty
Namespace Prefix:	FONR_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Accounts receivable from service and repair fees of Non Related MRI scanner customers; net of allowances for doubtful accounts

No definition available.

Name:	FONR_AccountsReceivableServiceAndRepairFees
Namespace Prefix:	FONR_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Management of, and other fees receivable from MRI Centers owned by non-related parties, - net of allowances for doubtful accounts

No definition available.

Name:	FONR_ManagementAndOtherFees_NonRelatedParties
Namespace Prefix:	FONR_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Management of, and other fees receivable from MRI Centers owned by related medical practices - net of allowances for doubtful accounts

No definition available.

Name:	FONR_ManagmentAndOtherFeesReceivableRelatedMedicalPracticesNetAllowances
Namespace Prefix:	FONR_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Medical receivable from management of specific centers - net of allowances for doubtful accounts

No definition available.

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_AccountsReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_AllowanceForDoubtfulAccountsCurrentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: