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5. PROPERTY AND EQUIPMENT (Tables)
12 Months Ended
Dec. 31, 2014
Property, Plant and Equipment [Abstract]  
Schedule of property and equipment
   December 31, 
   2014   2013 
         
Medical equipment  $36,618   $34,190 
Office equipment, furniture and fixtures   3,238    3,206 
Leasehold improvements   14,335    14,589 
Equipment under capital leases       1,982 
    54,191    53,967 
Accumulated depreciation and amortization   (40,346)   (36,173)
   $13,845   $17,794