Property and Equipment

12 Months Ended

Dec. 31, 2021

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):

	At December 31,
	2021		2020
Equipment (useful life 3 - 15 years)	$	1,308	$	1,281
Tooling (useful life 2 - 5 years)	384		240
Vehicles (useful life 5 years)	83		47
Furniture and fixtures (useful life 5 years)	86		137
Computer software (useful life 3 years)	1,194		1,057
Leasehold improvements (the shorter of useful life or lease life)	169		169
Finance lease right-of-use asset	13		13
UV - Robots (useful life 5 years)	105		—
Construction in progress	135		140
Property and equipment at cost	3,477		3,084
Less: accumulated depreciation	(2,802)		(2,664)
Property and equipment, net	$	675	$	420

Depreciation expense was $0.2 million for both of the years ended December 31, 2021 and 2020. There were no impairment charges for property and equipment during 2021 and 2020.