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Property and Equipment
 12 Months Ended
Dec. 31, 2020
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

 

2020

 

 

2019

 

Office furniture and equipment

 

 

3

to 

10 

 

$

5,219

 

 

$

4,979

 

Leasehold improvements

 

 

2

to

10 

 

 

1,610

 

 

 

1,609

 

Vehicles

 

 

5

to 

10 

 

 

206

  

 

 

206

 

Manufacturing and test equipment

 

 

2

to 

10 

 

 

2,833

 

 

 

2,779

 

 

 

 

 

 

 

 

 

9,868

 

 

 

9,573

 

Accumulated depreciation and amortization

 

 

 

 

 

 

 

(8,962

 )

 

 

(8,529

 )

Property and equipment, net

 

 

 

 

 

 

$

906

 

 

$

1,044

 

 

Depreciation expense on property and equipment for the years ended December 31, 2020 and 2019 was $422 and $512, respectively.