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Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2020
Property and Equipment  
Schedule of major classifications of property and equipment and estimated useful lives

 

 

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