Property, Equipment, and Leasehold Improvements

12 Months Ended

Dec. 31, 2020

5. Property, Equipment, and Leasehold Improvements

Property, equipment, and leasehold improvements, at cost, consisted of:


	December 31,
	2020			2019
Computer equipment	$	19,691		$	19,691
Furniture		434,697			434,697
Lab equipment		1,864,367			1,864,368
Leasehold improvements		2,006,389			2,028,013

		4,325,144			4,346,769
Less: accumulated depreciation and amortization		(3,415,069	)		(3,246,821	)

	$	910,075		$	1,099,948

Depreciation expense was $168,249, $169,159 and $151,292 for the years ended December 31, 2020, 2019 and 2018, respectively.