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PROPERTY AND EQUIPMENT (Details - Narrative) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]      
Depreciation and amortization expense $ 92.3 $ 83.1 $ 77.5
Construction in Progress      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 18.1    
Medical Equipment      
Property, Plant and Equipment [Line Items]      
Construction in progress, gross 2.6    
Computer and Office Equipment      
Property, Plant and Equipment [Line Items]      
Construction in progress, gross 6.1    
Leasehold improvements      
Property, Plant and Equipment [Line Items]      
Construction in progress, gross $ 9.3