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11. INCOME TAXES (Details - Net operating loss carryforward) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014
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Net operating loss carryforward | $ 248,576us-gaap_OperatingLossCarryforwards
NOL carryforward subject to 382 limitation | 42,111rdnt_NolCarryforwardSubjectTo382Limitation
California Operating Loss Carryforward | 47,506rdnt_OperatingLossCarryforwardsState
2015 |
Net operating loss carryforward | 0us-gaap_OperatingLossCarryforwards / us-gaap_RangeAxis = rdnt_Year2015Member
NOL carryforward subject to 382 limitation | 0rdnt_NolCarryforwardSubjectTo382Limitation / us-gaap_RangeAxis = rdnt_Year2015Member
California Operating Loss Carryforward | 13,741rdnt_OperatingLossCarryforwardsState / us-gaap_RangeAxis = rdnt_Year2015Member
2016 |
Net operating loss carryforward | 0us-gaap_OperatingLossCarryforwards / us-gaap_RangeAxis = rdnt_Year2016Member
NOL carryforward subject to 382 limitation | 0rdnt_NolCarryforwardSubjectTo382Limitation / us-gaap_RangeAxis = rdnt_Year2016Member
California Operating Loss Carryforward | 5,629rdnt_OperatingLossCarryforwardsState / us-gaap_RangeAxis = rdnt_Year2016Member
2017 |
Net operating loss carryforward | 15,185us-gaap_OperatingLossCarryforwards / us-gaap_RangeAxis = rdnt_Year2017Member
NOL carryforward subject to 382 limitation | 1,501rdnt_NolCarryforwardSubjectTo382Limitation / us-gaap_RangeAxis = rdnt_Year2017Member
California Operating Loss Carryforward | 9,172rdnt_OperatingLossCarryforwardsState / us-gaap_RangeAxis = rdnt_Year2017Member
2018 |
Net operating loss carryforward | 12,284us-gaap_OperatingLossCarryforwards / us-gaap_RangeAxis = rdnt_Year2018Member
NOL carryforward subject to 382 limitation | 0rdnt_NolCarryforwardSubjectTo382Limitation / us-gaap_RangeAxis = rdnt_Year2018Member
California Operating Loss Carryforward | 0rdnt_OperatingLossCarryforwardsState / us-gaap_RangeAxis = rdnt_Year2018Member
2019 |
Net operating loss carryforward | 7,178us-gaap_OperatingLossCarryforwards / us-gaap_RangeAxis = rdnt_Year2019Member
NOL carryforward subject to 382 limitation | 0rdnt_NolCarryforwardSubjectTo382Limitation / us-gaap_RangeAxis = rdnt_Year2019Member
California Operating Loss Carryforward | 0rdnt_OperatingLossCarryforwardsState / us-gaap_RangeAxis = rdnt_Year2019Member
Thereafter |
Net operating loss carryforward | 213,929us-gaap_OperatingLossCarryforwards / us-gaap_RangeAxis = rdnt_ThereafterMember
NOL carryforward subject to 382 limitation | 40,610rdnt_NolCarryforwardSubjectTo382Limitation / us-gaap_RangeAxis = rdnt_ThereafterMember
California Operating Loss Carryforward | $ 18,964rdnt_OperatingLossCarryforwardsState / us-gaap_RangeAxis = rdnt_ThereafterMember

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- Definition NOL carryforward subject to 382 limitation + References No definition available. + Details
Name: | rdnt_NolCarryforwardSubjectTo382Limitation
Namespace Prefix: | rdnt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References No definition available. + Details
Name: | rdnt_OperatingLossCarryforwardsState
Namespace Prefix: | rdnt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
Name: | us-gaap_OperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_RangeAxis=rdnt_ThereafterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=rdnt_Year2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=rdnt_Year2016Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=rdnt_Year2017Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=rdnt_Year2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=rdnt_Year2019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |