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Property And Equipment, Net (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross $ 2,562 $ 2,450
Less Accumulated Depreciation 1,488 1,417
Total Property and Equipment 1,074 1,033
Construction in Progress - Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross 90 0
Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross 273 260
Furniture And Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross 414 405
Building [Member]    
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross 1,370 1,370
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross $ 415 $ 415