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PROPERTY AND EQUIPMENT (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Summary of property and equipment [Abstract]    
Property and equipment, gross $ 55,989 $ 74,155
Less accumulated depreciation and amortization (50,129) (70,618)
Property and equipment, net 5,860 3,537
Construction in progress 904 777
Total 6,800 4,314
Office furniture and equipment    
Summary of property and equipment [Abstract]    
Property and equipment, gross 3,441 7,648
Computer hardware    
Summary of property and equipment [Abstract]    
Property and equipment, gross 4,239 5,209
Computer software    
Summary of property and equipment [Abstract]    
Property and equipment, gross 43,416 49,687
Automobiles    
Summary of property and equipment [Abstract]    
Property and equipment, gross 81 81
Leasehold improvements    
Summary of property and equipment [Abstract]    
Property and equipment, gross $ 4,812 $ 11,530