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2. SUMMARY OF ACCOUNTING POLICIES (Details - Earnings Per Share) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Earnings Per Share [Abstract]      
Net loss attributable to Radnet, Inc.'s common stockholders $ 2,120 $ 59,834 $ 7,231
BASIC NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS      
Weighted average number of common shares outstanding during the period 39,140,480 37,751,170 37,367,736
Basic net income per share attributable to Radnet, Inc.'s common stockholders $ 0.05 $ 1.58 $ 0.19
DILUTED NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS      
Weighted average number of common shares outstanding during the period 39,140,480 37,751,170 37,367,736
Add nonvested restricted stock subject only to service vesting 316,906 533,014 0
Add additional shares issuable upon exercise of stock options and warrants 357,150 960,502 1,417,939
Weighted average number of common shares used in calculating diluted net income per share 39,814,535 39,244,686 38,785,675
Diluted net income per share attributable to RadNet, Inc.'s common stockholders $ 0.05 $ 1.52 $ 0.19