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BALANCE SHEET COMPONENTS (Tables)
 12 Months Ended
Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of components of certain balance sheet line items
The components of certain balance sheet line items are as follows (in thousands):
 
 
 
December 31,
 
 
 
2018
 
 
2017
 
Property and equipment:
 
 
 
 
 
 
 
 
Office furniture and equipment
 
$
1,172
 
 
$
998
 
Assembly equipment
 
 
128
 
 
 
128
 
Vehicles
 
 
184
 
 
 
76
 
Leasehold improvements
 
 
480
 
 
 
-
 
Leased devices
 
 
317
 
 
 
-
 
 
 
 
2,281
 
 
 
1,202
 
Less accumulated depreciation
 
 
(1,462
)
 
 
(1,014
)
 
 
$
819
 
 
$
188
 
 
 
 
 
 
 
 
 
 
 
 
December 31,
 
 
 
2018
 
 
2017
 
Assets acquired under capital lease:
 
 
 
 
 
 
 
 
Original book value
 
$
461
 
 
$
461
 
Accumulated depreciation
 
 
(441
)
 
 
(379
)
Net book value
 
$
20
 
 
$
82