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

2. Property and Equipment, Net

Property and equipment, net consists of the following:

 

 

 

At December 31,

 

 

 

2020

 

 

2021

 

Laboratory equipment

 

$

1,924,596

 

 

$

1,949,318

 

Office equipment

 

 

152,003

 

 

 

175,245

 

Furniture and fixtures

 

 

292,866

 

 

 

292,165

 

Leasehold improvements

 

 

349,976

 

 

 

349,976

 

 

 

$

2,719,441

 

 

$

2,766,704

 

Less: Accumulated depreciation and amortization

 

 

(1,104,015

)

 

 

(1,647,614

)

Property and equipment, net

 

$

1,615,426

 

 

$

1,119,090

 

 

Depreciation and amortization expense for the year ended December 31, 2020 was $572,867 of which $362,892 is included in research and development expenses. Depreciation and amortization expense for the year ended December 31, 2021 was $543,598, of which $353,388 is included in research and development expenses.