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PROPERTY AND EQUIPMENT (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Property, Plant and Equipment, Gross $ 4,834 $ 4,828
Less accumulated depreciation (2,643) (2,642)
Property and Equipment, Net 2,191 2,186
Office furniture and equipment    
Property, Plant and Equipment, Gross 2,480 2,391
Assembly equipment    
Property, Plant and Equipment, Gross 100 100
Vehicles    
Property, Plant and Equipment, Gross 203 203
Leasehold improvements    
Property, Plant and Equipment, Gross 1,077 1,054
Capital projects    
Property, Plant and Equipment, Gross 16  
Leased devices    
Property, Plant and Equipment, Gross $ 958 $ 1,080