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Property and Equipment, Net
 12 Months Ended
Dec. 31, 2021
Property Plant And Equipment [Abstract]  
Property and Equipment, Net . Property and equipment, net

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

 

 

DECEMBER 31,
2021

 

 

DECEMBER 31,
2020

 

Leasehold improvements

 

$

21,691

 

 

$

23,949

 

Laboratory equipment

 

 

11,898

 

 

 

14,837

 

Furniture and fixtures

 

 

1,208

 

 

 

1,288

 

Computer equipment and software

 

 

119

 

 

 

159

 

Construction-in-process

 

 

372

 

 

 

1,667

 

 

 

$

35,288

 

 

$

41,900

 

Less: Accumulated depreciation and amortization

 

 

(11,809

)

 

 

(10,490

)

         Property and equipment, net

 

$

23,479

 

 

$

31,410

 

 

Depreciation and amortization expense related to property and equipment for the years ended December 31, 2021 and 2020 was $5.5 million and $4.4 million, respectively. During the year ended December 31, 2021 the Company sold laboratory equipment with a net book value of $4.8 million, which is recognized as a component of the gain on disposition (Note 3). In addition, during the year ended December 31, 2021, the Company wrote off leasehold improvements, during the normal course of business, with a net book value of less than $0.1 million, and is recognized as a component of other income (expense).