ACCOUNTS RECEIVABLE, MEDICAL RECEIVABLE AND MANAGEMENT AND OTHER FEES RECEIVABLE - Total Facilities (Details) - Integer	12 Months Ended
Jun. 30, 2023	Jun. 30, 2022
Receivables [Abstract]
Total Facilities Owned or Managed (at Beginning of Year)	27	27
Internal development	1
Managed Facilities Closed	(1)
Total Facilities Owned or Managed (at End of Year)	27	27

The Company's receivables from the related and non-related professional corporations (PS's) substantially consist of fees outstanding under management agreements. Set forth in the table are the number of facilities for the fiscal year-end.

No definition available.

Name:	FONR_TotalFacilitiesOwnedOrManagedAtBeginningOfYear
Namespace Prefix:	FONR_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration