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Property and Equipment, Net
 12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Property and Equipment, Net

5. Property and Equipment, Net

Property and equipment consist of the following (in thousands):

 

 

 

 

 

 

 

 

 

 

 

Estimated

 

 

 

 

 

 

    

 

Useful Life

 

December 31, 

 

    

(in years)

    

2020

    

2019

Machinery and equipment

 

3-5

 

$

95

 

$

13

Computers and hardware

 
3

 

 

660

 

 

529

Leasehold improvements

 

lease term

 

 

3,074

 

 

2,391

Furniture and fixtures

 
7

 

 

452

 

 

459

Software

 
3

 

 

995

 

 

824

 

 

 

 

 

5,276

 

 

4,216

Less:  accumulated depreciation

 

 

 

 

(1,876)

 

 

(1,133)

Total property and equipment, net

 

 

 

$

3,400

 

$

3,083

 

Depreciation expense was approximately $744,000,  $650,000, and $400,000 for the years ended December 31, 2020, 2019 and 2018, respectively.