Statements of Cash Flows (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Cash Flows from Operating Activities:
Net income	$ 9,230us-gaap_ProfitLoss	$ 8,816us-gaap_ProfitLoss
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,665us-gaap_DepreciationAndAmortization	2,887us-gaap_DepreciationAndAmortization
Provision for bad debts	10,784FONR_ProvisionForBadDebts	7,894FONR_ProvisionForBadDebts
Non-cash considerations	76FONR_NoncashConsiderations	407FONR_NoncashConsiderations
Stock option exercised		31
Compensatory element of stock issuances	53	86
(Increase) decrease in operating assets, net:
Accounts, management fee and medical receivable(s)	(13,554)	(11,012)
Notes receivable	118us-gaap_IncreaseDecreaseInReceivables	75us-gaap_IncreaseDecreaseInReceivables
Costs and estimated earnings in excess of billings on uncompleted contracts	79	(236)
Inventories	158us-gaap_IncreaseDecreaseInInventories	(433)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other current assets	89	31
Other assets	18	63
Increase (decrease) in operating liabilities, net:
Accounts payable	(178)	110
Other current liabilities	(501)	964
Customer advances	(259)	(67)
Other liabilities	(230)	(221)
Due to related medical practices	(2)	1
Income tax payable		(20)
Net cash provided by operating activities	8,546	9,376
Cash Flows from Investing Activities:
Purchases of property and equipment	(125)	(375)
Cost of patents	(108)	(172)
Net cash used in investing activities	(233)	(547)
Cash Flows from Financing Activities:
Repayment of borrowings and capital lease obligations	(2,166)us-gaap_RepaymentsOfNotesPayable	(3,401)us-gaap_RepaymentsOfNotesPayable
Distributions to noncontrolling interests	(3,306)	(3,724)
Buyout of noncontrolling interests	(4,971)FONR_BuyoutOfNoncontrollingInterests
Repayment of notes receivable from employee stockholders	6us-gaap_RepaymentsOfOtherDebt	14us-gaap_RepaymentsOfOtherDebt
Net cash used in financing activities	(10,437)	(7,111)
Net (Decrease) Increase in Cash and Cash Equivalents	(2,124)	1,718
Cash and Cash Equivalents - Beginning of Period	9,952	7,871
Cash and Cash Equivalents - End of Period	$ 7,828	$ 9,589

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