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Property and Equipment
6 Months Ended
Jun. 30, 2021
Property Plant And Equipment [Abstract]  
Property and Equipment

Note 6. Property and Equipment

Depreciation and amortization of property and equipment is calculated on the straight-line method based on the shorter of the estimated useful life or the term of the lease for tenant improvements and three to fifteen years for all other property and equipment. Property and equipment consist of the following (in thousands):

 

 

June 30,

 

 

December 31,

 

 

 

2021

 

 

2020

 

Computers and software

 

$

607

 

 

$

596

 

Furniture, fixtures, and equipment

 

 

400

 

 

 

400

 

Manufacturing and testing equipment

 

 

4,613

 

 

 

3,874

 

Construction in process

 

 

22

 

 

 

120

 

Leasehold improvements

 

 

932

 

 

 

932

 

Property and equipment, gross

 

 

6,574

 

 

 

5,922

 

Less accumulated depreciation

 

 

(3,803

)

 

 

(3,545

)

Property and equipment, net

 

$

2,771

 

 

$

2,377

 

 

Depreciation expense was $0.1 million for both the three months ended June 30, 2021 and 2020, and $0.3 million and $0.2 million for the six months ended June 30, 2021 and 2020, respectively.