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Property and Equipment
 3 Months Ended
Mar. 31, 2022
Property Plant And Equipment [Abstract]  
Property and equipment

Note 4. Property and equipment

Property and equipment, net consisted of the following (in thousands):

 

 

 

 

 

December 31,

 

 

March 31,

 

 

 

Useful Life

 

2021

 

 

2022

 

 

 

 

 

 

 

 

(unaudited)

 

Equipment and tooling

 

3 to 5 years

 

$

29,621

 

 

$

30,534

 

Computer equipment

 

3 to 5 years

 

 

3,835

 

 

 

3,967

 

Furniture and fixtures

 

10 years

 

 

844

 

 

 

839

 

Leasehold improvements

 

2 to 3 years

 

 

457

 

 

 

453

 

Total cost

 

 

 

 

34,757

 

 

 

35,793

 

Less: Accumulated depreciation

 

 

 

 

(24,267

)

 

 

(25,061

)

Property and equipment, net

 

 

 

$

10,490

 

 

$

10,732

 

 

 

 

 

 

 

 

 

 

 

 

Total depreciation expense was $0.9 million and $0.9 million for the three-month periods ended March 31, 2021 and 2022, respectively.