Property and equipment

12 Months Ended

Dec. 31, 2016

Property and equipment

Property and equipment

3. Property and equipment

Property and equipment, net consist of the following:

	Estimated
	useful life			December 31,
	(in years)			2016		2015
Equipment	2	-	7	$	998,722	$	958,175
Computer hardware	3	-	5		3,637,938		3,266,233
Furniture and fixtures	5	-	7		256,889		192,565
Leasehold improvements	3	-	10		1,037,386		746,336
Total property and equipment, gross					5,930,935		5,163,309
Less: Accumulated depreciation and amortization					(4,256,525)		(3,351,690)
Property and equipment, net				$	1,674,410	$	1,811,619

Property and equipment depreciation and amortization expense is as follows:

	Year ended December 31,
	2016			2015		2014
Depreciation and amortization expense		$	927,691	$	664,303	$	621,695

Included in depreciation and amortization expense for the year ended December 31, 2016 is $0.4 million 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 6.