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4. EARNINGS PER SHARE
 9 Months Ended
Sep. 30, 2015
Earnings Per Share [Abstract]  
EARNINGS PER SHARE

Earnings per share is based upon the weighted average number of shares of common stock and common stock equivalents outstanding, net of common stock held in treasury, as follows (in thousands except share and per share data):

 

   Three Months Ended   Nine Months Ended 
   September 30,   September 30, 
   2015   2014   2015   2014 
Net income (loss) attributable to RadNet, Inc.'s common stockholders  $7,987   $4,451   $6,828   $(2,829)
                     
BASIC NET INCOME (LOSS) PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS                    
Weighted average number of common shares outstanding during the period   43,637,022    41,644,606    43,247,002    40,734,083 
Basic net income (loss) per share attributable to RadNet, Inc.'s common stockholders  $0.18   $0.11   $0.16   $(0.07)
                     
DILUTED NET INCOME (LOSS) PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS                    
Weighted average number of common shares outstanding during the period   43,637,022    41,644,606    43,247,002    40,734,083 
Add nonvested restricted stock subject only to service vesting   437,689    1,001,190    484,810    – 
Add additional shares issuable upon exercise of stock options and warrants   677,225    1,387,784    972,511    – 
Weighted average number of common shares used in calculating diluted net income per share   44,751,936    44,033,580    44,704,323    40,734,083 
Diluted net income (loss) per share attributable to RadNet, Inc.'s common stockholders  $0.18   $0.10   $0.15   $(0.07)

 

For the nine months ended September 30, 2014 we excluded all outstanding options and restricted stock awards in the calculation of diluted earnings per share because their effect would be antidilutive.