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

5. Property, Equipment and Leasehold Improvements

Property, equipment and leasehold improvements consist of the following at:

 

 

 

June 30,

2021

 

 

December 31,

2020

 

Laboratory equipment

 

$

12,220,329

 

 

$

11,100,116

 

Office equipment

 

 

1,317,510

 

 

 

1,233,823

 

Leasehold improvements

 

 

6,592,419

 

 

 

6,058,400

 

Total

 

 

20,130,258

 

 

 

18,392,339

 

Less: accumulated depreciation and amortization

 

 

(8,430,778

)

 

 

(6,132,824

)

Property, equipment and leasehold improvements, net

 

$

11,699,480

 

 

$

12,259,515

 

 

Depreciation and amortization expense totaled $1,165,385 and $635,104 for the three months ended June 30, 2021 and 2020, respectively, and $2,313,395 and $1,252,573 for the six months ended June 30, 2021 and 2020, respectively.