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1. DESCRIPTION OF BUSINESS (Details)
Dec. 31, 2014
Franklin Imaging Joint Venture [Member]  
Percent owned by Radnet, Inc. 49.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= rdnt_FranklinImagingJointVentureMember
Carroll County Radiology, LLC [Member]  
Percent owned by Radnet, Inc. 40.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= rdnt_CarrollCountyRadiologyLlcMember
MRI at St. Joseph Medical Center, LLC [Member]  
Percent owned by Radnet, Inc. 49.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= rdnt_MriAtStJosephMedicalCenterLlcMember
Greater Baltimore Diagnostic Imaging Partnership [Member]  
Percent owned by Radnet, Inc. 50.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= rdnt_GreaterBaltimoreDiagnosticImagingPartnershipMember