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BALANCE SHEET COMPONENTS
3 Months Ended
Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
BALANCE SHEET COMPONENTS
(2) 
BALANCE SHEET COMPONENTS
 
The components of certain balance sheet line items are as follows (in thousands):
 
 
 
March 31, 2019
 
 
December 31, 2018
 
Property and equipment
 
 
 
 
 
 
 
 
Office furniture and equipment
 
$
1,541
 
 
$
1,172
 
Assembly equipment
 
 
128
 
 
 
128
 
Vehicles
 
 
184
 
 
 
184
 
Leasehold improvements
 
 
482
 
 
 
480
 
Leased devices
 
 
411
 
 
 
317
 
 
 
$
2,746
 
 
 
2,281
 
Less accumulated depreciation
 
 
(1,955
)
 
 
(1,462
)
 
 
$
791
 
 
$
819
 
 
The Company monitors devices out on lease for potential loss and places an estimated reserve on the net book value based on historical loss rates.
 
Total depreciation expense related to our property and equipment was $0.1 million and $25,000 for the three months ended March 31, 2019 and 2018, respectively.
 
Total depreciation expense related to devices out on lease was $0.1 million for the three months ended March 31, 2019 and 2018, respectively. Depreciation on leased units is reflected on the income statement as cost of revenue.