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PROPERTY AND EQUIPMENT - Summary of property and equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Public Utility, Property, Plant and Equipment [Line Items]    
Total $ 11,772 $ 11,769
Less accumulated depreciation and amortization (7,138) (6,792)
Property and equipment, net 4,634 4,977
Land    
Public Utility, Property, Plant and Equipment [Line Items]    
Total 1,056 1,056
Building and improvements    
Public Utility, Property, Plant and Equipment [Line Items]    
Total 9,060 9,060
Computer equipment    
Public Utility, Property, Plant and Equipment [Line Items]    
Total 629 626
Purchased software    
Public Utility, Property, Plant and Equipment [Line Items]    
Total 83 83
Furniture and fixtures    
Public Utility, Property, Plant and Equipment [Line Items]    
Total 778 778
Office equipment    
Public Utility, Property, Plant and Equipment [Line Items]    
Total $ 166 $ 166