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10. RELATED PARTY TRANSACTIONS (Details Narrative) (USD $) In Thousands, unless otherwise specified | 9 Months Ended
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Sep. 30, 2012
Related Party Transactions [Abstract] |
Amount paid to related parties | $ 458,000

X
- Definition Amount paid to related parties + References No definition available. + Details
Name: | rdnt_AmountPaidToRelatedParties
Namespace Prefix: | rdnt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration