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SUBSEQUENT EVENTS (Details Narrative) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012 Percent
Acquisition for cash	$ 700,000
Percentage of ownership interest sold	41.00%
Sale of ownership interest in joint venture	$ 1,800

X

- Definition

Custom Element.

+ References

No definition available.

+ Details

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Namespace Prefix:	rdnt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Custom Element.

+ References

No definition available.

+ Details

Name:	rdnt_SaleOfOwnershipInterestInJointVenture
Namespace Prefix:	rdnt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of cash paid to acquire the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph f(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
Period Type:	instant