NOTE 14 - INSURANCE PROCEEDS (Details Narrative) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011
Note 14 - Insurance Proceeds Details Narrative
Insurance proceeds related to equipment lost in a fire	$ 2,400
Proceeds related to equipment lost in a flood	319
Additional proceeds related to the fire	$ 309

Insurance proceeds related to equipment lost in a fire

No definition available.

Name:	rdnt_InsuranceProceedsRelatedToEquipmentLostInFire
Namespace Prefix:	rdnt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration