Property and Equipment

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property and equipment consisted of the following at December 31:



	Range of useful lives	2017			2016

Computer equipment	3 – 5 years	$	1,074,172		$	933,752
Office equipment	3 – 15 years	457,945			355,456
Furniture and fixtures	5 – 15 years	633,577			618,808
Leasehold improvements	3 – 15 years, or remaining lease term	1,274,660			1,256,378
Total property and equipment, gross		3,440,354			3,164,394
Less: accumulated depreciation and amortization		(2,911,472		)	(2,699,940		)
Total property and equipment, net		$	528,882		$	464,454

Depreciation expense, including amortization expense related to leasehold improvements, is included in general and administrative expense in the consolidated statements of operations. Depreciation expense was as follows for the years ended December 31:



	2017		2016		2015

Depreciation expense	$	211,532	$	202,868	$	257,545