Note 4 - Property and Equipment, Net
 12 Months Ended
Dec. 31, 2021
Notes to Financial Statements  
Property, Plant and Equipment Disclosure [Text Block]

4. Property and Equipment, net

 

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

 

  

As of December 31,

 
  

2021

  

2020

 

Laboratory equipment

 $4,406  $4,406 

Leasehold improvements

  5,838   4,616 

Computer equipment and software

  1,589   1,724 

Construction in process

  13,805   14,101 

Tooling

  826   1,109 

Furniture and fixtures

  250   292 
   26,714   26,248 

Less accumulated depreciation and amortization

  (10,786)  (10,589)

Property and equipment, net

 $15,928  $15,659 

 

Depreciation and amortization expense was $1.1 million for each of the years ended December 31, 2021 and 2020, respectively.