Property and equipment

12 Months Ended

Dec. 31, 2014

4. Property and equipment

Property and equipment, net consist of the following:

		As of December 31,
	Estimated useful life (in years)	As of December 31,
	Estimated useful life (in years)	2014			2013
Equipment	2 - 7	$	945,116		$	939,129
Computer hardware	3 - 5		2,963,629			2,493,658
Furniture and fixtures	5 - 7		194,399			182,562
Leasehold improvements	3 - 10		749,275			689,648

Total property and equipment, gross			4,852,419			4,304,997
Less: Accumulated depreciation and amortization			(2,712,672	)		(2,106,357	)

Total property and equipment, net		$	2,139,747		$	2,198,640

Property and equipment depreciation and amortization expense is as follows:

	Year ended December 31,
	2014		2013		2012
Depreciation and amortization expense	$	621,695	$	554,765	$	532,784

- Definition

The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.

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