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PROPERTY AND EQUIPMENT (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 194,908 $ 174,606
Less: Accumulated depreciation (81,721) (72,493)
Property and equipment, net 113,187 102,113
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 2,642 2,642
Building and improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 71,359 53,568
Office and lab equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 96,927 85,881
Furniture and fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 12,676 8,921
Construction-in-progress [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 11,304 $ 23,594