NOTE 2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Jul. 01, 2019
Accounting Policies [Abstract]
Shares included upon conversion of Class C Common to calculate a diluted EPS.	128,000	128,000	128,000	128,000
Material impact on Companys balance sheet from adoption of ASU 2016-02 regarding the present value of future operating lease payments.					$ 33,300
Receivable from landlord for tenant improvements	$ 562		$ 562

During February 2016, FAS issued ASU 2016-02, Leases (Topic 842). The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based upon the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Lease with a term of 12 months or less will be accounted for similar to existing guidance for operating leases. The new guidance will be effective for annual reporting periods beginning after December 15, 2018, including interim periods within that reporting period and is applied retrospectively. The Company adopted this guidance on July 1, 2019, as required, electing to apply retrospectively at the period of adoption with practical expedients. The adoption of this guidance had a material impact on the Company’s balance sheet by virtue of including the present value of its future operating lease payments as a liability of $33.3 million and related right-to-use lease assets as of July 1, 2019.

No definition available.

Name:	FONR_MaterialImpactOnCompanysBalanceSheetFromAdoptionOfAsu201602RegardingPresentValueOfFutureOperatingLeasePayments.
Namespace Prefix:	FONR_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant