Property and equipment

9 Months Ended

Sep. 30, 2017

6. Property and equipment

Property and equipment, net consist of the following:


	Estimated			As of		As of
	useful life			September 30,		December 31,
	(in years)			2017		2016
Equipment	2	-	7	$	1,070,822	$	998,722
Computer hardware	3	-	5		4,057,362		3,637,938
Furniture and fixtures	5	-	7		258,065		256,889
Leasehold improvements	3	-	10		1,058,023		1,037,386
Total property and equipment, gross					6,444,272		5,930,935
Less: Accumulated depreciation and amortization					(4,791,788)		(4,256,525)
Property and equipment, net				$	1,652,484	$	1,674,410

Property and equipment depreciation and amortization expense is as follows:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Depreciation and amortization expense	$	215,488	$	328,181	$	527,526	$	768,740

Included in depreciation and amortization expense for the three and nine months ended September 30, 2016 is $0.2 million and $0.3 million, respectively, of expense related to the acceleration of amortization on certain assets due to exiting a floor in the Company’s corporate location before the end of the lease term. The cease use date was October 1, 2016. For additional information on the Company’s restructuring charges disclosure, refer to Note 14.