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NOTE 2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Earning Per Share                      
Net Income attributable to Radnet, Inc.'s common stockholders $ 56,629 $ 5,053 $ 2,946 $ (111) $ 4,547 $ 39 $ 3,521 $ (876) $ 64,517 $ 7,231 $ (12,852)
BASIC NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS                      
Weighted average number of common shares outstanding during the year 38,349,000 38,340,000 37,761,000 37,670,000 37,426,000 37,426,000 37,358,000 37,258,000 37,751,170 37,367,736 36,853,477
Basic net income per share attributable to Radnet, Inc.'s common stockholders $ 1.47 $ 0.13 $ 0.07 $ 0 $ 0.12 $ 0 $ 0.09 $ (0.02) $ 1.71 $ 0.19 $ (0.35)
DILUTED INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS                      
Weighted average number of Common Shares outstanding during the year 38,349,000 38,340,000 37,761,000 37,670,000 37,426,000 37,426,000 37,358,000 37,258,000 37,751,170 37,367,736 36,853,477
Nonvested restricted stock subject only to service vesting                 533,014      
Additional shares issuable upon exercise of stock options and warrants                 960,502 1,417,939   
Weighted average number of common shares used in calculating diluted net income per share 39,796,000 39,861,000 39,431,000 37,670,000 38,059,000 38,470,000 39,820,000 37,258,000 39,244,686 38,785,675 36,853,477
Diluted income per share attributable to RadNet, Inc.'s common stockholders $ 1.42 $ 0.12 $ 0.07 $ 0 $ 0.12 $ 0 $ 0.09 $ (0.02) $ 1.64 $ 0.19 $ (0.35)