Property and Equipment

9 Months Ended

Sep. 30, 2022

Property, Plant and Equipment [Abstract]

Property and Equipment

PROPERTY AND EQUIPMENTProperty 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):

	September 30, 2022		December 31, 2021
Equipment (useful life 3 to 15 years)	$	1,096	$	1,308
Tooling (useful life 2 to 5 years)	413		384
Vehicles (useful life 5 years)	81		83
Furniture and fixtures (useful life 5 years)	86		86
Computer software (useful life 3 years)	1,144		1,194
Leasehold improvements (the shorter of useful life or lease life)	141		169
Finance lease right-of-use asset	13		13
mUVeTM ultraviolet-C light disinfection robots (useful life 5 years)	—		105
Projects in progress	68		135
Property and equipment at cost	3,042		3,477
Less: accumulated depreciation	(2,609)		(2,802)
Property and equipment, net	$	433	$	675

Depreciation expense was $42 thousand and $43 thousand for the three months ended September 30, 2022 and 2021, respectively. For the nine months ended September 30, 2022 and 2021, depreciation expense was $129 thousand and $143 thousand, respectively. During the third quarter of 2022 it was determined that the mUVeTM ultraviolet-C light disinfection robots were no longer of use and the net book value of $76 thousand was recorded as a loss on write-off of fixed assets.