Property and Equipment

6 Months Ended

Jun. 30, 2016

Property, Plant and Equipment [Abstract]

Property and Equipment

PROPERTY AND EQUIPMENT

Property and equipment are stated at cost and depreciated using the straight-line method over the estimated useful lives of the related assets and consist of the following (in thousands):

	June 30, 2016			December 31, 2015
Equipment (useful life 3 to 15 years)	$	3,388		$	2,864
Tooling (useful life 2 to 5 years)	802			851
Vehicles (useful life 5 years)	78			39
Furniture and fixtures (useful life 5 years)	170			104
Computer software (useful life 3 years)	707			581
Leasehold improvements (the shorter of useful life or lease life)	534			509
Construction in progress	519			310
Property and equipment at cost	6,198			5,258
Less: accumulated depreciation	(3,059		)	(2,829		)
Property and equipment, net	$	3,139		$	2,429

Depreciation expense was $185 thousand and $52 thousand for the three months ended June 30, 2016 and 2015, respectively. For the six months ended June 30, 2016 and 2015, depreciation expense was $336 thousand and $101 thousand, respectively.