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Property and Equipment, Net
 6 Months Ended
Jun. 30, 2022
Property, Plant and Equipment [Abstract]  
Property and Equipment, Net

4. Property and Equipment, Net

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

 

 

 

JUNE 30,

 

 

DECEMBER 31,

 

 

 

2022

 

 

2021

 

Machinery and equipment

 

$

6,615

 

 

$

6,659

 

Leasehold improvements

 

 

579

 

 

 

579

 

Furniture and fixtures

 

 

319

 

 

 

319

 

 

 

$

7,513

 

 

$

7,557

 

Less: Accumulated depreciation and amortization

 

 

(4,830

)

 

 

(4,511

)

 

 

$

2,683

 

 

$

3,046

 

 

Depreciation and amortization expense for each of the three months ended June 30, 2022 and 2021 was $0.3 million. Depreciation and amortization expense for each of the six months ended June 30, 2022 and 2021 was $0.6 million.