Property and equipment

6 Months Ended

Jun. 30, 2017

Property and equipment

Property and equipment

6. Property and equipment

Property and equipment, net consist of the following:

	Estimated			As of		As of
	useful life			June 30,		December 31,
	(in years)			2017		2016
Equipment	2	-	7	$	1,001,081	$	998,722
Computer hardware	3	-	5		3,843,177		3,637,938
Furniture and fixtures	5	-	7		257,531		256,889
Leasehold improvements	3	-	10		1,077,657		1,037,386
Total property and equipment, gross					6,179,446		5,930,935
Less: Accumulated depreciation and amortization					(4,572,331)		(4,256,525)
Property and equipment, net				$	1,607,115	$	1,674,410

Property and equipment depreciation and amortization expense is as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
Depreciation and amortization expense	$	153,421	$	277,433	$	312,038	$	440,559