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PROPERTY AND EQUIPMENT
12 Months Ended
Dec. 31, 2022
PROPERTY AND EQUIPMENT  
PROPERTY AND EQUIPMENT

10. PROPERTY AND EQUIPMENT

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

​

​

​

​

​

​

​

​

​

​

December 31, 

​

​

2022

    

2021

Equipment

​

$

48,632

​

$

42,892

Leasehold improvements

​

 

18,527

​

 

15,263

Land and buildings

​

​

15,893

​

​

17,214

Construction in process

​

 

5,008

​

 

4,185

Furniture and fixtures

​

 

2,396

​

 

1,844

Software

​

 

2,183

​

 

2,346

Tooling

​

 

2,145

​

 

2,000

Computer equipment

​

 

2,076

​

 

1,725

Automobiles

​

​

1,180

​

​

905

Property and equipment, gross

​

 

98,040

​

 

88,374

Less: accumulated depreciation

​

 

(41,769)

​

 

(29,664)

Total property and equipment, net

​

$

56,271

​

$

58,710

​

For the years ended years ended December 31, 2022, 2021 and 2020, depreciation expense was $12.1 million, $8.5 million, and $7.6 million, respectively.