Property and Equipment

12 Months Ended

Dec. 31, 2015

Property and Equipment

Property and Equipment

6. Property and Equipment

Property and equipment consisted of the following:

	December 31
	2014		2015
Laboratory equipment	$	1,536,432	$	1,543,289
Computers and software		315,640		358,485
Furniture, office equipment and leasehold improvements		237,810		259,367
Office equipment under capital leases		125,014		125,014
		2,214,896		2,286,155
Less: accumulated depreciation and amortization		(1,686,420)		(1,868,340)
	$	528,476	$	417,815

Depreciation and amortization expense was $125,956 and $187,993 for the years ended December 31, 2014 and 2015, respectively.