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

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

No definition available.

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

On June 30, 2016, the Company purchased 100% interest in TK2 Equipment Management, LLC and Turnkey Services of New York, LLC.

No definition available.

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

Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.

No definition available.

Name:	us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of an asset, typically cash, provided to a counterparty to provide certain assurance of performance by the entity pursuant to the terms of a written or oral agreement, such as a lease.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.8,17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682