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PROPERTY AND EQUIPMENT
9 Months Ended
Sep. 30, 2017
Property, Plant and Equipment [Abstract]  
PROPERTY AND EQUIPMENT
(2) PROPERTY AND EQUIPMENT
 
Property and equipment as of September 30, 2017 and December 31, 2016, consist of the following (in thousands):
 
 
 
September 30,
 
December 31,
 
Useful
 
 
 
2017
 
2016
 
lives
 
 
 
(UNAUDITED)
 
 
 
 
 
Office furniture and equipment
 
$
967
 
$
911
 
3-7 years
 
Rental inventory
 
 
1,503
 
 
1,411
 
5 years
 
Vehicles
 
 
76
 
 
76
 
5 years
 
Assembly equipment
 
 
125
 
 
125
 
7 years
 
 
 
 
2,671
 
 
2,523
 
 
 
Less accumulated depreciation
 
 
(2,333)
 
 
(1,943)
 
 
 
 
 
$
338
 
$
580
 
 
 
 
Total depreciation expense related to our property and equipment was $0.1 million for the three months ended September 30, 2017 and 2016.
 
Total depreciation expense related to our property and equipment was $0.2 million and $0.3 million for the nine months ended September 30, 2017 and 2016, respectively.