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Property and Equipment
 12 Months Ended
Dec. 31, 2022
Property and Equipment  
Property and Equipment

5. Property and Equipment

 

Major classifications of property and equipment and estimated useful lives were as follows:

 

 

 

Estimated useful lives

 

As of December 31,

 

 

 

in years

 

2022

 

 

2021

 

Office furniture and equipment

 

 

3

to 

10 

 

$

66

 

 

$

5,410

 

Leasehold improvements

 

 

2

to

7 

 

 

121

 

 

 

1,610

 

Vehicles

 

 

5

to 

10 

 

 

41

  

 

 

206

 

Manufacturing and test equipment

 

 

2

to 

10 

 

 

1,146

 

 

 

2,846

 

 

 

 

 

 

 

 

 

1,374

 

 

 

10,072

 

Accumulated depreciation and amortization

 

 

 

 

 

 

 

(991

)

 

 

(9,328

)

Property and equipment, net

 

 

 

 

 

 

$

383

 

 

$

744

 

 

Depreciation expense on property and equipment for the years ended December 31, 2022 and 2021 was $263 and $378, respectively.