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PROPERTY AND EQUIPMENT (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Summary of property and equipment [Abstract]    
Property and equipment, gross $ 55,708 $ 54,551
Less accumulated depreciation and amortization (51,214) (49,290)
Property and equipment, net 4,494 5,261
Construction in progress 864 865
Total 5,358 6,126
Office furniture and equipment    
Summary of property and equipment [Abstract]    
Property and equipment, gross 2,739 2,638
Computer hardware    
Summary of property and equipment [Abstract]    
Property and equipment, gross 3,856 3,879
Computer software    
Summary of property and equipment [Abstract]    
Property and equipment, gross 44,264 43,454
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 4,508 4,230
Assets Held under Capital Leases [Member]    
Summary of property and equipment [Abstract]    
Property and equipment, gross $ 260 $ 269