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NOTE 2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 1) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2011
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FAIR VALUE MEASUREMENTS |
Interest Rate Swaps | $ 5,064
Fair Value Inputs Level 1 Member |
FAIR VALUE MEASUREMENTS |
Interest Rate Swaps |
Fair Value Inputs Level 2 Member |
FAIR VALUE MEASUREMENTS |
Interest Rate Swaps | 5,064
Fair Value Inputs Level 3 Member |
FAIR VALUE MEASUREMENTS |
Interest Rate Swaps |

X
- Definition Interest Rate Swaps + References No definition available. + Details
Name: | rdnt_InterestRateSwaps
Namespace Prefix: | rdnt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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