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PROPERTY AND EQUIPMENT (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross $ 2,522 $ 2,523
Less accumulated depreciation (2,000) (1,943)
Property and Equipment, Net 522 580
Office furniture and equipment    
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross $ 911 911
Office furniture and equipment | Maximum    
Property, Plant and Equipment [Line Items]    
Property and Equipment, Useful Life 7 years  
Office furniture and equipment | Minimum    
Property, Plant and Equipment [Line Items]    
Property and Equipment, Useful Life 3 years  
Rental inventory    
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross $ 1,410 1,411
Property and Equipment, Useful Life 5 years  
Vehicles    
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross $ 76 76
Property and Equipment, Useful Life 5 years  
Assembly equipment    
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross $ 125 $ 125
Property and Equipment, Useful Life 7 years