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BALANCE SHEET COMPONENTS (Tables)
 6 Months Ended
Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Condensed Balance Sheet
The components of certain balance sheet line items are as follows (in thousands):
 
Property and equipment:
 
June 30, 2018
 
 
December 31, 2017
 
Office furniture and equipment
 
$
1,065
 
 
$
998
 
Assembly equipment
 
 
128
 
 
 
128
 
Vehicles
 
 
129
 
 
 
76
 
Leasehold improvements
 
 
479
 
 
 
-
 
Leased devices
 
 
59
 
 
 
-
 
 
 
$
1,860
 
 
$
1,202
 
Less accumulated depreciation
 
 
(1,082
)
 
 
(1,014
)
 
 
$
778
 
 
$
188
 
 
Assets acquired under capital lease:
 
June 30, 2018
 
 
December 31, 2017
 
Original book value
 
$
461
 
 
$
461
 
Accumulated depreciation
 
 
(411
)
 
 
(379
)
Net book value
 
$
50
 
 
$
82